300B project

[Dave C]

This dirty workbench represents the start of my 300B project. I ordered Antek power transformers and am doing research on using 7193 driver tubes. I know just enough to be dangerous but if I can only find the right paper I know I'll find the information I need! My old trusty HK playing some Floyd through my old Heathkit AS-10's provides my insperation.

 

[clydeselsor]

Looks like my garage...

 

[spaceman]

Take your time, you have to set the proper mood. I've been flirting with the paperwork for my Cit I for a day or 2 now, but don't want to spook her.

 

[djnagle]

Got a schem? I have my 300B in the cue for an update and rebuild. Good luck.

 

[Dave C]

My 300B schematic is a spin off of the Walton audio 300B. I still have some unknowns in selecting resistors in the 7193 end of the amp.

 

[bricktop]

Seems to be close to a 6SN7/6J5, you can check out some designs that use them. Using them instead of the 7193 will also make it easier not having to rig up plate and grid caps.

 

[Dave C]

Hey bricktop, The Walton uses a 6SN7 driver. My idea was to try the 7193 instead.

 

[Dave C]

300B as I've drawn it. I don't yet know the values of the circled resistors. Comments and corrections welcome.