Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Rixster909 on October 18, 2023, 12:33:50 am

Title: RIX plexi 6V6
Post by: Rixster909 on October 18, 2023, 12:33:50 am

After building 9 plexi's to sell, decided to build one to keep. This one incorporates all my favorite mods. Uses 6EY6 output tubes to pull the filament voltage down to 6.6 volts. I have used a 12AY7 PI a la Merlin. Capacitor values fine tuned to reduce excessive bass from the normal channel. Tonemaster Tone stack. The chassis is a Hammond 1550J diecast box that was powdercoated after metalwork. The dual gang Post PI master really works to allow crunch preamp grind at low volume.

Title: Re: RIX plexi 6V6
Post by: sluckey on October 18, 2023, 05:28:27 am

Nice looking amp. Can we see some gutshots? And a schematic?

Title: Re: RIX plexi 6V6
Post by: Rixster909 on October 18, 2023, 05:58:59 pm

The amp is built on a Hoffman turretboard and follows the Huss/Hoffman Schematic except for component variations which are shown on the .diy layout. There is an added 100pF 3kV ceramic on the bright preamp from cathode to Plate, I always add this to suppress any Parasitic oscillation . A mains filter on the right hand side eliminates Noises coming in from the power line...clicks,pops, Solar inverter noises etc.