Just put them in series with the filament. You might want to have some 0R1 power resistors on hand to drop extra voltage if needed. The 6B4G scheme is 47 and 51 ohms to compensate for the 120Hz ripple in the rectified filament supply.Ĥ) I assume that using 45s would mean a slightly higher filament voltage due to the lower current requirements. Freshest and best Tiktoks of December 2020Oh yeah, I remember those guys, werent they supposed to be Gods chosen people Thats what the bible says. You can even match your four resistors up. Since we have a perfect sine wave, we want a perfect voltage divider. But hopefully the 5V4 will accommodate that.ģ) The voltage divider resistors are now all 24 ohms across the 2.5V filaments. The Hammond 302AX is a second source for those that can't wait 6 or 7 weeks for Edcor, but it is double the price and only 600VCT. The 5V rectifiers allow some adjustment due to their different voltage drops. If anyone sees something goofy, let me know.Ģ) B+ voltage will probably be different than the 6B4G design due to the new power transformer (640VCT instead of 660VCT). GoDocs was founded in Danville, Virginia by a group of medical professionals that want to make exceptional medical care available to all the citizens of Danville and Pittsylvania county from the comfort of their own home, in a nursing home or assisted living facili ty and in our beautifully rennovated GoDocs. And a voltage divider and jumper wire is added for the 6SL7 AC heater reference (using D2 & D4 footprints, so it doesn't get messy).ġ) I haven't built this, so there could be some documentation errors. Hospitals & Physicians Clinics Virginia, United States <25 Employees. Three small socket jumpers on V2 turn our rectifier into a 5U4/5V4/5Y3. The power transformer will be an Edcor XPWR067-100/120.
The filaments will be AC and the DC circuit gone. It uses a just two filament taps from a single power transformer, whereas a 2A3 amp usually requires four.Īnyhow, I think I have a nifty scheme using a regular GSG PCB. But the get*set*go was very much designed around the 6B4G. I also guess people want to use part of their tube stash, which I can't blame one for that. I've been getting more and more requests for a 45 & 2A3 compatible amp over the last year, which I attribute to 6B4Gs getting more expensive and modern 2A3s - particularly Chinese ones - are much more abundant.
0 kommentar(er)
