Coleman regulator filament. A heatsink will get hot.

Coleman regulator filament. Later I replaced L2 with a Coleman regulator.
 


Coleman regulator filament The gyrator is early prototype of Ale Moglia design. 4. Later I replaced L2 with a Coleman regulator. The required supply voltage headroom: Tag: Rod Coleman filament regulator The low gain DHT pre-amp library. bartola. Each set consists of a pair of regulator (Original price: GBP 25) and a pair of raw power supply (diode bridge and CLC filter, priced at GBP12). DHT filament regulators. The bias regulators will go into the Prologue 2. In my opinion the filament in ac for dht is the best way to run. Kit tersedia dalam dua versi, RC-v8 dan RC-v9, di mana masing-masing versi Filament Bias: Using Coleman Regulator for 26 and 4П1Л(4P1L) DHTs. The Mule Project (continues) 3B7 DHT Preamp; UV-201a DHT Preamp Revisited; 2P29L DHT Preamp; 2Ж27Л / 2Z27L DHT Preamp; 01a Preamp (Gen2) 4P1L (4П1Л) Siberian Gen4 – DHT Preamplifier; Siberian Gen 3 (4P1L pre-amplifier) 26 DHT pre The Ronan regulator was the DIY rage back before the TentLabs and Coleman DHT filament regs became available. See Lyrima, UK. This needed a 470Ω The problems you outline are exactly what Mr. The best approach is to work with -9V, and if the anode-current is too high (not likely) - you can reduce the B+ a little. 2015-08-13 2:10 pm #753 2015-08-13 2:10 pm Filament works like current regulator, if it gets warmer resistance gets higher and prevents change of the current. I would expect better results (sound quality) by using multiple regulators, though. 2014­8­19. 5 out of 5 stars. But for something like a 2A3 (45V bias, 2. 70. 5V after Coleman or 7. There are a few schematics of the ANdht01v7 ©Rod Coleman 2004 – 2015 DHT Coleman Regulator a current probe and a good oscilloscope to monitor the little current peaks in the rectifiers, and adjust parts values to get Rod Coleman’s DHT filament regulator. T. Primarily designed for Coleman stoves experiencing pressure issues, this replacement Each regulator will need its own transformer winding. I've used a few recently with really excellent results in terms of eliminating filament noise on DHT's in SET's with full range highly sensitive drivers (Lowthers, 101 db). I do use LT1084 as pre-regulators which can be problematic because of the behavior of their current limiting as well as the sorts of issues Frank mentions. Add to wishlist Specification; Reviews; SKU. The Coleman regulator is adjusted at 1A which is perfect for the 101D tube and slightly starved for the 26. After many years of refining the DC filament The Coleman Collectors Forum The best information regarding Coleman stoves, lanterns and other gas pressured appliances! Poo Ping Ancient Asian Philosopher Says: My husband has his dad's old Coleman Propane camp stove and it's missing the regulator hose. The filaments should be supplied with DC by a Coleman-like DHT filament regulator, and it would be nice if both regulators could run off the same raw DC supply. This means a B+ of about 120V for 26, and 150V for 4P1L. Next Last. My rule of thumb: Filament voltage + bias voltage on bias resistor (if it exist) + R. Category: PCB-KIT. Thread starter revintage; Start date 2023-12-12 10:19 pm; 1; 2; Next. I remember in early 2000’s when I was actively reading/participating in diyaudio forums, he Coleman regulator is also a current source regulator so my guess Paul hasn't used it. I reused the 01a Rod Coleman regulators and the filament bias is a pair of 27Ω Russian 2% NOS wire wound filaments. If the DHT's are using cathode resistors for the bias, each tube will need its own regulator. LJ mengimpornya langsung dari Rod Coleman dalam jumlah sangat terbatas. I am going to try the Rod Coleman regulators, and then if the voltage is not sufficient to drive the Rod Coleman Regulator. The Mule Project (continues) 3B7 DHT Preamp; UV-201a DHT Preamp Revisited; 2P29L DHT Preamp; 2Ж27Л / 2Z27L DHT Preamp; 01a Preamp (Gen2) 4P1L (4П1Л) Siberian Gen4 – DHT Preamplifier; Siberian Gen 3 (4P1L pre-amplifier) 26 DHT pre Extend the life of your older RoadTrip® Grill model 9941 model with this replacement clip-on regulator assembly. Keeping the Hi, I have a few sets of Coleman DHT filament heaters to let go. I'm in the testing phase and I encounter a strange behaviour, seems like not enough current is fed to the reg, witch seems odd. 5 V. Rod Coleman has developed another fantastic circuit after the success of his DHT filament regulator which is now the preferred filament supply kit within the DIY audio community. Not rated yet. PP with Rod Coleman CCS heater regulators Dave Slagle came with the DHT filament regulators Last Post Swingarm (@swingarm) New Member. I was erroneously locked in on the low dropout part. For really significant signal frequency isolation, you also need something like the Rod Coleman regulators. The DHT filament regulators; DHT Preamps; Traced curves; Library; 300B SE Amplifier; THD measurement; The grid of the GM-70 is properly driven by a source follower which also provides the DC bias using a Rod Difficult to quantify sound improvement - but I can say this: A Coleman Regulator applied in a Filament Bias Regime (that is: a low-value cathode-resistor, which carries the whole filament current, so that the resistor becomes low enough that a bypass-capacitor is not required) - in this Regime the negative end of the filament must be connected to the resistor - or else the When we are talking about DC heating, we must talk about Rod Coleman also. It is a fantastic filament supply, many people use them with excellent results. Ritchie. 5A Assembly Manual. co. over 10 years I am using my own DHT filament regulator. regulator (between "input" and "output"). Why you need so low noise for heaters ? IMO, you should play safe and use current regulated DC for heating 71A filaments. Add to compare. I'm still using a 1998 Sovtek 300B (one of the worst filament-snappers) bearing witness to this improvement. Filament bias using Rod Coleman v7 regulators. 2021-06-17 5:39 pm #2 2021-06-17 5:39 pm #2 Like many others I use Rod Coleman regulators - much better sound than LT1085 which they replaced. They're an excellent solution but they do require a decent I'm a happy Coleman Regulator user, but I love this form factor. Joined 2004. I plan to include an interlock signal - able to drive a relay - once the filament is warmed up enough for the voltage to come into spec. 2019-03-11 12:37 pm #6 2019-03-11 12:37 pm #6 kokoriantz said: The output voltage is selectable but no 6. R. Compatible with Coleman regulator C001, Buy exact-fit Coleman Propane Regulator & Hoses at GrillSpot Canada, the replacement grill parts store. Joined 2010. Submitted by VT52 on Sat, 09/06/2018 - 16:14. It also has a custom option that allows the builder to set an output voltage in the range of 1. no more than 10. Testing the Rod Coleman Fixed Regulator. 2017-11-14 8:43 am #50 Rod Coleman. Below is an extract of my e-mail exchanges with Rod Coleman and Guido Tent. 3V supplied after Coleman that is 9V on 10ohms. Not Fits Coleman Gas Stove Regulator. Rectifier and filter caps, current control, one of the fancy filament supplies like the Coleman regulator? Just curious. PP with Rod Coleman CCS heater regulators. It works well. I was wanting to measure ripple on the output of the regultaors. Before building any stage with filament bias, be sure to check the power burned in that resistor. NEW! a PCB and some of the parts to make a raw dc Supply for your "Rod Coleman" DHT Filament Regulators are now available as a kit. DHTs are constructed with the audio signal path directly connected to the heating current of their cathodes. Add first review. This regulator can adjust from about 215mA to 330mA. You may find this is way too much gain in your system. Regulators are mounted, inspected very carfully but not installed 1. Account Closed. 46 filament bias and the regulator . ~Tom Rod Coleman DHT Filament Regulator . The model is 5424 B701. Promo khusus pengguna baru di aplikasi Tokopedia! Website tokopedia memerlukan javascript untuk dapat ditampilkan. It differs from general 1. The Mule Project (continues) 3B7 DHT Preamp; UV-201a DHT Preamp Revisited; 2P29L DHT Preamp; 2Ж27Л / Hello, I like the concept of *heater bias* with Rod Coleman Filament Regulators which has been shown as viable for eliminating cathode bypass caps in *indirectly heated triode* driver stagesthinking of doing this for C3g triode driving 300B as a two stage amp. audiowize. dreamth. The LT raw supply C-r-CMC-C type. 6 V by Coleman bias and filament regulators. I'm new to filament bias so not sure whats going on and starved DHT filament regulators. 2019-03-06 11:24 pm #3 2019-03-06 11:24 pm #3 I have the Coleman but haven't built it yet. This amplifier responds better to the grid current of the output stage once the output power goes over 3. HP8903B. ” Then on April 22, 2016, you said: Kit Rod Coleman Regulator, filament supply for directly-heated triodes (DHT). 900. The test-resistor is a “fake filament” - its resistance value is: R = Vf/If (Vf: normal filament voltage, If: normal filament current). Since the filament current is 150% higher Rod Coleman DHT Filament Regulator I have first hand experience - I run a derivative of the Transcendent 300B SE-OTL amps - thats four 300Bs per channel, single-ended with no output transformer that uses eight of this type of filament supply - ridiulously inefficient but so, so special. 5V/1A -put it to socket filament pins-) with R. Back in 2018, I built the below pre-amp. Overall, current sources sounded better, so I stopped using the CMCs. I will back up my claims with measurements and I will base my design Hi everyone, I'm converting my raphaelite CSK30 to monoblocks and I wish to integrate the rod coleman regs V7 I assembled some months ago. As a bonus we get soft start and regulated filament current in the fragile DHT filaments found in current production tubes which is a must for long life of the tube. 003% = 36uV; Rod Coleman DHT Filament Regulators are available as a kit: 2x PCB + all PCB parts. 80 $ 23. I will do the initial tests with the filament boards I have and will send you a PM to get yours and do a comparison, ok? Thanks! The build was very quick given the minor modification needed on my mule setup. Rod Coleman has developed another fantastic circuit after the success of his DHT Rod Coleman DHT Filament Regulator Issue. Compatible with Coleman Regulator C001, 5010000743. You get also two custom made EI two bobbin transformers and DC power supply boards on a wooden plate whit Panasonic FM capacitors. Rod Coleman DHT Filament Regulators are available as a kit: 2x PCB + all PCB parts. You can use a pair of FT-2 100nF alternatively. There are so many different ways to go with biasing the 01A. They are installed on copper plates, this also included in price. 0. 1; 2; First Prev 2 of 2 Go to page. 2019-07-05 10:31 pm #3 2019-07-05 10:31 pm #3 demetrios said: Please look at this Application Note: Assembling Low-Current, Low Noise DHT Coleman Regulator. Main Features of the Raw dc Kit: 2A version or 5A Version. This power supply kit is used to provide well-filtered DC for the filaments of directly heated tubes, such as the 4P1L, 26, 01A, 45, 2A3, 300B, etc. fit for Roadtrip LXE, Le, Lx, LXX grills, Party Portable grills. uk/valves/ 2017-09-24 10:21 am #247 2017-09-24 10:21 am Ale's Gyrator-Filament bias Rod Coleman I bread boarded the gyrator with the 01A today. Joined 2019. DHT Push-Pull; DHT filament regulator; Why filament regulators in DHT? DHT Preamps. At . The Coleman Regulators will run from rectified dc, and still give ripple-current in the low microamp region. Date. 4V for nominal value, with these. Description; KIT đốt tim Rod Coleman có sẵn cho các loại sau, Vui lòng liên hệ để đặt hàng cho đúng nhu cầu. 8 KB · Views: 472 Windcrest77. This is a new regulator for the 5430 stove series. Jump to Latest Magz. 25A, R = 3Ω (use 3x 1Ω Direct Heated Triode Filament Regulator System Design Considerations and Installation manual Rod Coleman: valve. You could use this signal to apply B+ through a relay, since you will get on turn-ON delay of 30~60 seconds, depending on the filament Filament Bias: Using Coleman Regulator for 26 and 4П1Л(4P1L) DHTs. FREE delivery Tue, Nov 12 on $35 of items shipped by Amazon. 50 CAD stateside. 80. victordascalescu54. Coleman regulator on 2A3. Because the filament IS the cathode and all that that implies. 2x PCB 170 x 18mm to support raw dc for a stereo pair of Filament Regulators After the sun sets, illuminate your night under the stars with the NorthStar® 1500 Lumens 1-Mantle Propane Lantern. It's probably the best filament supply kit available for DIY out there. It seems a long time indeed. One thing that came up is that a CMC after a voltage reg improved the sound BUT a CMC after a current source degraded the sound. Although there is no available hard evidence for or against such mechanism, professional equipment Coleman regulator on 2A3 . Not ever offered as a separate Thanks Tom. Normally it would be followed by a regulator like the Testing the Rod Coleman Fixed Regulator. Jump to Latest The two PP valves have anode current flowing in the filament in antiphase (180° apart). New enclosure with better layout for improved wiring, a few tweaks and the replacement of unregulated DC filament supplies with Rod Coleman's DHT regulators for the output tubes. My PT is a PW300ABA-230 from raphaelite 390V - 320V - 100V - 0V - 320V - 390V at 300mA I understand that with DH filaments there is a great advantage of using a regulator like the Coleman regulator. amps@yahoo. Measure voltage headroom on R. It differs from general-purpose voltage regulators in a number of ways: 1. With our low price guarantee, we strive to offer the lowest everyday prices on the best 1. nautibuoy. V5 original. In fact, when tested THD, I found that starving the filaments to 200mA has a great impact in reducing THD. Tjj226. Separate transformer windings, rectifiers, filtering, yada yada, are the bare minimum for cathode bias. Can I just connect F+/F- to both sides of filament without grounding? or any filament resistor needed Hi, I am comparing the effects of having a regulated DC filament supply for my DIY preamp, loosely based on C22. Application Note: Assembling the Coleman Regulator V7 1. Voltage durability is 250V, or even higher. uk. $1. The preamplifier uses either the 101D or the 26 tube in a filament bias Regulated DC power supply or filament supply. I always expect Canadians to get a better price on Hammond stuff, but that doens't seem to be the case. V7, add transmitter types. General application. Without over-dwelling on this subject, to me DHT preamps Testing the Rod Coleman Fixed Regulator. Parts you will need (NOT supplied in the kit): filament. Coleman Regulators - GM70 Heating of directly heated filaments is a much discussed subject. I am selling fully assembled, working 2x sets of the filament boards used whit 301, 01A tubes but can be also used whit 71A or 12A whit 5V 250mA filament. C. A heatsink will get hot. Nov 21, 2019 #63 Yes, bridge rectifier and 16,000uF cap for each tube. 7 Design example for the 01A, 71A 112A: 5. 1 V on 30 ohms bias resistor The main On my exchange with Rod Coleman regarding this post, I asked him to send me a pair of his latest DHT filament regulator (version 9) ER-801a, Gyrator, RC Reg V9, Rod Coleman Regulator, VT-25, VT-25 preamp 4 Comments on 801a preamp revisited (part I) About Bartola® Valves. The anode current produces a signal-voltage If you connect this circuit to a DHT and enjoy the wonderful sound for a while, then try putting a 1uF across the filament – the sound is degraded below AC standard. V. 2020-12-19 11:02 pm #1 2020-12-19 11:02 pm #1 Hello all. In both cases - 26 & 4P1L - about -9V of bias is desirable. Thread starter Milkduds; Start date 2017-03-08 4:38 pm; Status This old topic is closed. 1. If voltage is 10V then means you are running the filaments at full spec, which is About this item 【Compatibility 】Regulator replacement for Coleman Roadtrip Portable Grill, Fix your grill to keep it running like new. At least in DIY audio circles. If you want to reopen this topic, contact a moderator using the "Report Post" button. Version: v4. 25A, R = 3Ω (use 3x 1Ω Coleman bias and filament regulators. This will also impact the stage gain, but here all this is not a problem. 7. 2015­3­12. I think the ground can be shared, but I'm not 100% sure. Set starved to 200mA; The output caps are Russian NOS teflon FT-3 220nF / 600V. 5W. 0. 2020-11-16 8:28 Coleman 2 stage regulators, along with voltage doubling, would be excellent. Beli Kit Rod Coleman Regulator Filament Supply DHT Triode 26 300B di Langsung Jadi Elc. Notes. Rod Coleman has developed another fantastic circuit after the success of his DHT Coleman Bias Regulator V1 1. The bias point is changed slightly up to Why Should I use a Coleman Regulator to heat my directly heated triodes? When connected as a CCS, for say a 1,2A 300B filament, the regulator applies 1,2V across a 1-ohm resistor (the 1 Ohm is the current-sense resistor), so the output noise is: Vn = 1,2V x 0. Thread starter Bdubois61; Start date 2020-12-19 11:02 pm; Jump to Latest B. Coleman regulator is only the filament supply of the DHT. It differs from Why Should I use a Coleman Regulator to heat my directly heated triodes? (Rod Coleman) I asked Rod for some details around DC in DHT and kindly offered writing this page. Can I just connect F+/F- to both sides of filament without grounding? or any filament resistor needed IDHT Bias with Rod Coleman Filament regulator. The test-resistor is a “fake filament” - its resistance value is: R = Vf/If (Vf: normal filament Application Note: Assembling the Coleman Regulator RC-V8 1. 2013-08-04 8:29 am Tried the Rod Coleman and Tentlab regulators without success. Joined 2016. com : Coleman Tabletop 2-in-1 Camping Grill/Stove, 2-Burner Propane Grill & Stove for Outdoor Cooking with Adjustable Burners & Pressure Regulator, 20,000 BTUs of Power for Camping, Tailgating, Grilling : The filament regulator designed by Rod Coleman (V4, later changed to V7). I can achieve total silence when using these regulators in my 300b SETs (D3a driver with interstage). 2011-06-01 2:48 pm #45 2011-06-01 2:48 pm #45 TheGimp said: How do you distinguish 2nd order harmonic noise from electrical induced emission from second order harmonic noise from thermal induced emission? I will also be posting complete schematics of the amplifier and filament regulators as I have for my On my exchange with Rod Coleman regarding this post, I asked him to send me a pair of his latest DHT filament regulator (version 9) to test them on my 801a preamp with a cathode bias resistor (degenerated or un Just started building a 300B SE, the original design connect +5VDC to one filament, and the other to ground. S. 46 Driver -2 x Rod Coleman 4P1L filament regulator board (populated, unused) -Raw power supply board for the RC Regs (not soldered, includes 8 x 4700uF/25V Pana FC's and Schottkey diodes) -2 x 56uF/400V caps for the Rod Coleman DHT Filament Regulator . The Coleman regulator is pretty cool. I've had my eye on building the Pete Millett 6B4G / 6S4S (6C4C in cyrillic) / or possibly 6A3 (with adapter) amp (version 2) for over a year now, its truly DHT filament regulators. Details & order: The filament bias resistors are removed and we use the Coleman regulators directly on the filaments of the 4P1L. Randy . 0 output stage as well as the planned DHT amps at a later date. Used on the input side, even a small choke will filter some AM or HF radio stations I lost count of happy conversions from these modules to my filament regulator, and as an example, here's one in the open forum space: TRAM-II-Filament Regulator upgrading Rod Coleman. Carlson could add something to the filament regulation design This will not seal the typical Coleman lantern cap. The Mule Project (continues) 3B7 DHT Preamp; UV-201a DHT Preamp Revisited; 2P29L DHT Preamp; The Rod Coleman Filament Regulators were already tested in the New Year. If this is for your 300B project, no. Raw dc Supply PCB Kit for use with Rod Coleman DHT Filament Regulator. Joined 2018. I bet Mr. IDHT Bias with Rod Coleman Filament regulator. Without any tube, feed the filament bias resistor (example 10R) series connected 1R5 (as tube filament 1. There are 5 tubes in this pre-amp. Raw DC Filament Power Supply Kit. (Some newer 9941 RoadTrip® models will use Shop for Coleman Replacement Camp Stove Pressure Regulator, Pipe, and Valve at Cabela’s, your trusted source for quality outdoor sporting goods. Same PSU when switched to 01A ( biased at 230mA), will provide at least 12. Overall the Rod Coleman Regulators V4 are fantastic. The raw filament supply circuit follows the standard design recommended by Rod Coleman to use the filament regulator boards. I don't think the Coleman regulator is shorted to ground as that was one of the first things I checked: the positive line shows no continuity, while the 1) Test filament supply: if your Rod Coleman regulator is working, you should be able to measure 7-8V across the 10 ohm bias resistor array. 328. " there obviously is something tangible between those applications, more than (so typical) better sound. I never changed my starting setup: low In this case the filament resistor R9 will increase anode resistance by R9 times (μ+1). You need to have some General Description of the Coleman Regulator for Filament-Heating. I'm currently using Rod Coleman's filament regulator boards (CCS and gyrator) to heat the GM70s in my amps, quite happy with their performance and they're reasonably priced. Look for the markings on your grill to confirm the model number. Enjoy our money-back guarantee,1-year warranty & free shipping offer. The preamp is extremely quite - in the sense, the sound seems to come from a quite and a black back ground, hard to explain, but that is what Testing the Rod Coleman Fixed Regulator. 5V for 300Bs (at low mains); Aim for about 9. Testing the 4-65a filament regulators . I tried some over the years, and did not like them. 2, 2012-9-5: Add 6P21S Please Read this Note together with Andht01 [PDF Manual] 6. This is good enough to get the longest lifetime from the filaments of DHTs. When the Regulator is assembled, test the regulator using a resistor, to make sure everything is OK, before connecting it to your filament. Hopefully soon. For the 01A, 112A, 71A (etc) recommended raw dc level is 9 - The filament supply for the 46 is pretty elaborate - LCRC feeding to coleman reg, and I have built 46 linestages with other filament supplies, and this one just took the sound to another dimension. I use the Coleman regs in my GM70 amp, which have been running reliability for several years, so no complaints But that has more substantial demands on the raw power supply, and between the transformers, power supply and regulator, and Just started building a 300B SE, the original design connect +5VDC to one filament, and the other to ground. Stability brought to the amp and sound impact is impressive. I could easily reuse my Rod Coleman’s regulators and provide the 250mA required. 000 đ. 2A3s and #45s have 2. The Bias Regulator is a low current (<1mA) shunt regulator, intended for grid-bias voltages in the presence of the high voltage supply before the cathode/filament has warmed up. 6A3sUMMER. See attached layout. The Mule Project (continues) 3B7 DHT Preamp; UV-201a DHT Preamp Revisited; 2P29L DHT Preamp; DHT filament regulators. . The filament regulators will be for those same DHT amps, giving me a The Coleman Gas Stove 5430 Regulator is a valuable essential for ensuring your Coleman stove maintains a steady gas pressure. KIT1: 01A, 71A 26, 6A3, 6B4G, WE101D, PX4, 300B, 801A On my exchange with Rod Coleman regarding this post, I asked him to send me a pair of his latest DHT filament regulator (version 9) to test them on my 801a preamp with a cathode bias resistor (degenerated or un I've used quite a few designs for DC filaments. On the inside lid it says approved for use with regulator Output 15V, . Control-loop of the Filament Heating power is highly isolated from the music-signal across the Filament. I have already built a pair of old-fashioned LCLC-filtered power supplies but I´m not satisfied with them so let´s forget about them. The PSU box is simple, I put it at the bottom of the rack. lucat. Joined 2014. Selling price: GBP25 for Coleman regulator, filament bias and CCS load (Gary Pimm latest rev before it was pulled from the interweb). Modules were meant for an upgrade of my DHT linestage but I decided to go another direction and ended by selling it couple of days ago. General Description of the Coleman Regulator for Filament-Heating. reg headroom (variable of versions) == raw DC Each filament has its own Rod Coleman regulator. The purpose is to increase the output driving Re: Have You Used Rod Coleman Filament Regulators & Ale Bartola Gyrators? Reply #4 on: August 25, 2022, 12:21:28 AM Use a very similar setup myself, Ale's gyrator boards & Rods filament regulators in a CX301 preamp. 1 of 2 Go to page. The PerfectFlow™ pressure regulator helps the lantern perform consistently even in extreme conditions so Application Note: Assembling the Coleman Regulator V7 (Transmitter). Ordered a some bias regulator kits and DHT filament regulators from Rod Coleman. (that cost is heat not DHT filament regulators. Coleman's regulator solves, and by all reports, quite reliably. As I have 9Vac and 6Vac outputs from my transformer, I used the 9Vac supply for 3 ECC83s for audio and Alternatively I could consider using a Coleman regulator as described here (diagram attached): The old version of filament regulator that served for bias (in the drawing at post #1) has given way to a dedicated regulator (Thanks for posting, Hearinspace!) and can supply -250V or any value of bias voltage for big triodes. My filament regulators have the advantage that they have been used widely for 14 The 01A is filament biased using Coleman regulators. The voltage headroom allows a high The filament supply was mains transformer - Schottky bridge - 100mH inductor (L1) - 40000uF capacitance - umbilical from external filament supply to signal part of amp - 100mH inductor (L2) on positive filament, filament return grounded through bias resistor. 5 to 12. 2 Test Resistors (Cheap Cement wirewound type). So I connected the tip of a probe to one side of the filament, and another tip of a probe to the With modern filamentary cathodes (Directly Heated Valves) though, it is a different story. The Coleman regulator gives microampere-level ripple, or even lower, and no energy storage is required. 55; This is the gasket that goes between the propane regulator and the small propane bottles that you screw on. The issue. Amazon. Joined 2009. It mainly keeps out the 50hz hum and other high frequency hash from DHT SE sound. png. 2. ** For Receiving Tubes (2. Not difficult, but won’t say dead easy. John . That tube only draws 50mA so the battery lasted a good long while - roughly 24 hours. The Mule Project (continues) 3B7 DHT Preamp; UV-201a DHT Preamp Revisited; 2P29L DHT Preamp; 2Ж27Л / 2Z27L DHT Preamp; 01a Preamp (Gen2) 4P1L (4П1Л) Siberian Gen4 – DHT Preamplifier; Siberian Gen 3 (4P1L pre-amplifier) 26 DHT pre Coleman Regulators Part 2 - GM70 Rather a long time ago now I posted about Rod Coleman's filament regulators which I use for heating GM70s (and other DHTs). I just assembled 2 each of the Coleman DHT regs with his raw dc supplies and I am having trouble Coleman Bias Regulator V2 1. It takes an AC input voltage from a transformer winding and provides these output voltages: 1. Each filament must float, meaning ideally as isolated from its power supply as possible. 5. 5, 2. 6. Version. filaments and AC heating is frequently OK. I managed to get a nice pair of [email protected] chokes made by JMS transformers which 300B-5V-Regulated-Filament-Schematic. Parts you will need (NOT supplied in the kit): before connecting it to your filament. If it corresponds to Rod recommended value, the regulator working properly. Mine are on my top plate which is 4mm aluminium, so that is I have a Coleman regulator ready to go, so seems easy to try filament bias as well. Regulators for the filament, not for me. 1. It differs from general-purpose voltage regulators in a numbers of ways: 1. D. Longer life, better sound. The HT PSU working with AZ1 mesh anode rectifier, c-L-C-L-C design. 2022-01-21 10:58 pm #8 2022-01-21 10:58 pm Author Ale Moglia Posted on October 28, 2013 November 2, 2013 Categories DHT, Music, Pre-amplifier, THD, Valves & Hi-Fi Tags 26 DHT, 26 DHT preamp Gen3, 26 filament bias, 26 Gen3, 26 LL2745 preamp, 26 preamp, 26 Preamplifier, DHT Preamp, Rod Coleman Regulators, SSHV2 2 Comments on 26 Pre-amplifier Gen3 Now for the sound - a DIY friend has compared this solution with the Coleman regulator, and has found that the difference in sound quality is minimal (might be even placebo, for that matter). TentLabs filament supply is designed to heat DHT's the cleanest way possible, without affecting the music currents generated inside the tubes' heater, see this presentation that explains the advantages of current source filament supplies. Add to cart. This replacement regulator assembly keeps your camp grill performing optimally. 0, and 6. Joined 2012. This circuit feeds the filament from the ‘positive’ Learn about the design considerations and installation of the DHT Coleman Regulator, a device for providing a regulated DC supply for the filaments of direct-heated triode tubes. It works with RoadTrip® grill models 9949 and 9949A and some 9941 model grills. 0V 250mA Filament. No hum at all Application Note: Assembling the Coleman Regulator RC-V8 1. with Rod Coleman regulators as well. Filament breakage is very common with all the modern factory output, and lower stress from CCS heating is certainly worth the trouble. For valves with reasonably low filament current, and low bias voltages, it is a good solution. However, the hum increases, when higher filament voltages are used. Refer to PP with Rod Coleman CCS heater regulators . 5A and lower), Please use the 2. 5, 5. 3v . An idea discussed with Rod Coleman, Andy Evans and others in DYIAudio forum which still is evolving. I can get that choke for 16. Set the R. I must add that he has tried standard AC as well, and while AC had unacceptable hum levels on his efficient speakers, he did not find AC sonically With my regulators for the 300B filament, please remove the humpot, and connect the cathode bias resistor to the NEGATIVE side of the filament, for the V9 Regulator. $23. Is there any reason why I can’t just add a LCLC at the output of the bench supply to get the ripple where I AC filaments with a triode that is built somewhat like a 45, 2A3 (double filament/double plate), 300B, 845, 211, etc. The filament regulators will be for those same DHT amps, giving me a The last circuit uses a fixed-5V LDO voltage regulator also shields the filament from the positive power-supply connection, as the regulator and filament define a constant-current source, with the filament resistance replacing the usual The resistors only dropping voltage, so CMC and R. One regulator with fixed bias (Circuit 4): Each DHT valve has its own fixed bias at the grid (circuit omitted for simplicity) and both filament share a Rod Coleman DHT filament regulators. L. regulator to 1A. 75 lbs; We hope you enjoy shopping at Old Coleman Parts Did you use 1k for R20 and 4ohm for R1 on the Coleman regulator in filament bias on the 01A? mogliaa. As part of my 300B SE project design, I looked into various fixed bias arrangements and regulators. Unlike indirectly heated valves directly heated filaments are a whole lot more picky about how they're warmed up as they are 1. (without using a regulator) by upping my filament voltage to maybe 9V DC and inserting a large resistor to bring it back down to the 6 volts. Sunsun22. . PS as is usual for me damper diode and choke input to oil cap, and selection of teflon/foil or PIO output caps (my amplifiers MCAMPAS QCC1 Universal Grill Regulator Hose with Coleman Threaded Regulator for Coleman Roadtrip Grills. Just use a Rod Coleman regulator, it will answer all your problems and sound better. And to supply the "raw DC" to the filament regulator I Testing the Rod Coleman Fixed Regulator. You assemble the Regulator yourself, using the PCB and components. 2020-03-27 3:48 pm #RESTOCK: Rod Coleman Regulator module for DHT (directly-heated triode) supply available now: v8 and v9. Rod Coleman has developed another fantastic circuit after the success of his DHT filament Not sure how widely known the Coleman filament regulator kits are. 4-65a filaments are lovely . $36. Was aiming for 15Ω, but That's totally OK for a 300B filament. A brief description of the amp: three Thinking about using a Tentlabs negative bias module in combination with Rod Coleman's Filament Supply, to fixed-bias and dc-power the filaments of a DHT. Heats 2 Tubes. Rod Coleman has developed another fantastic circuit after the success of his DHT If the difference between LM317 regulator to Rod Coleman filament regulator, as mcandmar said is like: "difference was night and day. Three for audio and two for power supply. Rod Coleman DHT Filament Regulator Issue. 2021-09-17 2:04 pm #21 2021-09-17 2:04 pm #21 It has the same audio-frequency isolating qualities as the filament regulator, and the same ultra-low noise. Rod Coleman. Example: for 845 or 211: 10V/3. Just my opinions and experience. I forgot to add that I'm running the valve with filament bias, therefore I will probably need 7V. The required supply voltage headroom: The Universal Filament Regulator is BAAAACK!!! This time in a completely redesigned revision 5. (The current-drive filament warms up MUCH slower than any other method). I've used a few recently with really excellent results in terms of eliminating filament noise on DHT's in SET's Rod Coleman also has a very interesting approach to DHT filament regulation. The Coleman Regulator is a purpose-designed Regulator for heating Directly-Heated Electron Tubes. Here is Not sure how widely known the Coleman filament regulator kits are. Thread starter Cagomat; Start date 2021-07-01 10:19 pm; Prev. These two are like synonyms now. 5430-5541; Weight. I want to implement a Coleman regulator, apparently I can't connect one filament to GND, which shorts the CCS part of the regulator. A. regulator. 3 V selectable by jumper. For more than 10 years I’ve been experimenting, designing and enjoying DHT pre-amps. Go. Best design of all is by Rod Coleman - total overkill but great sound: I think you would have to isolate both + and ground filament traces for the coleman. jdsalinger Super Member. Minimise hum without interfering with the anode current. Today most guys building amps and preamps today, use the Rod Coleman regulator. For DHT's with one end of the filament grounded, you could try to run multiple tubes from the same regulator. You can find boards/kits for sale here (no commercial interest, just admiration for the design). Stuffing all kit components in the PCB is very simple. Tag: Rod Coleman Regulator Improving the CX301a DHT pre-amp. 5A current: = >110W burned in the resistor) the heating power in the filament bias resistor is far too much. Bdubois61. Joined 2015. Member. Rod Coleman’s filament DC regulators are crucial to Great campsite meals start with an efficient grill. More info on the connection and testing is available on the V7 Filament Regulator page - there's a link to that on I am offering here a pair of Rod Coleman fabulous DHT filament regulators with their corresponding raw power supplies ( also designed by Rod). 2011-05-30 9:32 pm #27 I intend to design a filament regulator that performs well both when considered as a stand-alone voltage source and when used for a filament supply in either a directly headed triode or an indirectly heated tube. I designed and built a simple DC regulated power supply to drive the 300B filaments in the "Unnecessarily Complex 300B Amp" some time ago. 00; Out of stock. PP with Rod Coleman CCS heater regulators . The latest versions of my Filament Regulator (V5 and V7) can accept input voltages down to 8. Cooling: The Regulator power transistors are cooled by mounting to a heatsink - or you can use some amplifier-chassis or metalwork for cooling. Before switching to the 2P29L, I was experimenting with the 1LE3 and using a single AA on the filament. Since then I have had a number of At startup, the Coleman Filament Regulator is slowly feeding current into the high impedance of the cold DHT filament. Greetings, Eduard Click to expand They're excellent. With a capacitor-input supply at startup, the raw DC voltage supplied to the regulator is only slightly The filaments draws 7,5V 4A each and AC heating is out of the question since µ=49. Although there is no available hard evidence for or against such mechanism, professional equipment I'm currently building an 845 amp, and have my coleman regulator's built. regulator dissipation decreases. H. nqxmqc tqkz jkwp ahysnrr amysf pikfdxs bxibo wqvtqlf jns dxto