syscokid
Ambassador of War & Peace
The whole point of posting is that this little project turned out to lead into a pretty cool sounding 20-watt amp. The whole idea of building a clone of a 6G3 started after I briefly considered rewiring my Tweedy style Deluxe 5E3 clone to the Brownface specs, but omitting the tremolo because of the 5E3’s smaller chassis and board. But the more I played through my Tweedy, the more I wanted to keep as it is and start with a completely separate build. So, hot on the heels of T-Rex’s 6G3 build and thread that was posted earlier this month, I’m ready to show off mine. My build resulted in three different versions that started about five months ago. And what I mean by “Lite”, is that the 6G3’s stock tremolo circuit is omitted, the stock fixed bias circuit is replaced with the simpler cathode biased circuit, and some of the original circuit’s voicing has been “lightened”… I’ll explain more later, but all is very similar to what T-Rex put together on his 6G3 clone.
Transformers, chassis, and custom faceplates, are manufactured and sold from Modulus Amplification. My first time trying Modulus’s home built trannies. Head shell cab was built and sold from Guitar Cabinets Direct.
First of all, this is what looks like on the outside currently:
First version circuit board completed in June. The power tube's cathode bias 250 ohm resistor was modded to produce 400 ohms of total resistance and help keep the bias at about 95%. Eventually, I did order a separate 400 ohm power resister to clean up the add-ons', but i never ended up using it. The whole circuit's grounding and the parallel heater wiring instead of twisted heater wiring, was another inspiration from Modulus Amps. Amp already sounds awesome at this point, but I couldn't leave well enough on it's own.
But after some enlightening wisdom I picked out from The Amp Garage forum, I changed the amp back to its original and intended fixed bias circuit, but with an added pot for adjustability. A floating mini board hosting the adjustable fixed bias circuit. The normal channel's cathode circuit has been almost Pexified. It's already looking "Frankenstiened"! Version number 2:
Version 3 came about the main idea to lower the 435v of B+ voltage down to the 380's. Fortunately, Granger Amps had a sweet little add-on kit that will do the trick. I opted for their -51v setup. The little MOSFET secures to the chassis with a screw and heat sink compound. The board with stand-offs floats above it:
Transformers, chassis, and custom faceplates, are manufactured and sold from Modulus Amplification. My first time trying Modulus’s home built trannies. Head shell cab was built and sold from Guitar Cabinets Direct.
First of all, this is what looks like on the outside currently:
First version circuit board completed in June. The power tube's cathode bias 250 ohm resistor was modded to produce 400 ohms of total resistance and help keep the bias at about 95%. Eventually, I did order a separate 400 ohm power resister to clean up the add-ons', but i never ended up using it. The whole circuit's grounding and the parallel heater wiring instead of twisted heater wiring, was another inspiration from Modulus Amps. Amp already sounds awesome at this point, but I couldn't leave well enough on it's own.
But after some enlightening wisdom I picked out from The Amp Garage forum, I changed the amp back to its original and intended fixed bias circuit, but with an added pot for adjustability. A floating mini board hosting the adjustable fixed bias circuit. The normal channel's cathode circuit has been almost Pexified. It's already looking "Frankenstiened"! Version number 2:
Version 3 came about the main idea to lower the 435v of B+ voltage down to the 380's. Fortunately, Granger Amps had a sweet little add-on kit that will do the trick. I opted for their -51v setup. The little MOSFET secures to the chassis with a screw and heat sink compound. The board with stand-offs floats above it:
