Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Colas LeGrippa on April 26, 2024, 11:12:47 am

Title: 6g15 Fender reverb unit
Post by: Colas LeGrippa on April 26, 2024, 11:12:47 am
Hi my friends,I plan to build a Fender external reverb unit and I am wondering if I can substitute the 6k6gt tube for another one  (eg 6V6gt) with the same efficiency.
Thanks for comments


Colas
Title: Re: 6g15 Fender reverb unit
Post by: sluckey on April 26, 2024, 11:28:08 am
yes

https://el34world.com/Hoffman/files/Hoffman_6G15.pdf
Title: Re: 6g15 Fender reverb unit
Post by: idsnowdog on April 26, 2024, 02:37:29 pm
Could you add tremolo with this 6AV6 circuit based on Rob Rob's 1/2 tube circuit?  I have been thinking about building one but I would like tremolo too.
Title: Re: 6g15 Fender reverb unit
Post by: tubeswell on April 26, 2024, 02:42:33 pm
Yes, and decrease the cathode resistor for the 6V6 (1k is way too cold).
Title: Re: 6g15 Fender reverb unit
Post by: idsnowdog on April 26, 2024, 02:50:25 pm
Do I have the pinout right for the 6AV6?
Title: Re: 6g15 Fender reverb unit
Post by: sluckey on April 26, 2024, 04:09:00 pm
If you are dreaming of adding tremolo, take a look at Hoffman's Revibe.
Title: Re: 6g15 Fender reverb unit
Post by: Colas LeGrippa on April 26, 2024, 04:27:23 pm
Ok thanks
Title: Re: 6g15 Fender reverb unit
Post by: sluckey on April 26, 2024, 04:45:37 pm
Quote from: tubeswell on April 26, 2024, 02:42:33 pm
Yes, and decrease the cathode resistor for the 6V6 (1k is way too cold).
1K works very well in Revibe
Title: Re: 6g15 Fender reverb unit
Post by: HotBluePlates on April 30, 2024, 02:55:19 pm
Quote from: tubeswell on April 26, 2024, 02:42:33 pm
Yes, and decrease the cathode resistor for the 6V6 (1k is way too cold).
Quote from: sluckey on April 26, 2024, 04:45:37 pm
1K works very well in Revibe

1kΩ works very well in the original 6G15 reverb units.

They don't need "max power output" (1 watt +/- is good enough), and they need to not-distort even on strong signals (the schematic shows 24v of bias).