ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

Any one ever build a plexi head?

:

2/23/2000 7:22 AM
nathan	Any one ever build a plexi head? has any one ever done this or could help me with building one? Thanks, Nathan

2/23/2000 12:06 PM

It's not that bad.. what do you want to know?
I mean it's tougher than a tweed Champ, ;-)

;-)

but it's really the same as a 5F6-A Bassman with a
few tweaks here and there. The key to good results
is just using the best parts (esp tubes!) and taking your
time to build it right/cleanly. I have a photo of some plexi
'guts' up on my website if you want to see what a typical
amp might look like inside. There's another thread going
about DIY Marshall-type amps with parts sources suggestions
etc.

2/23/2000 7:18 PM
Richie	i think you'll find many on here have built the plexi amp..and bassman. and are using them to play through..I have built a few... {~}==::: Richie

2/23/2000 8:35 PM
nathan	did you happen to use hammond or just replacement transformers? what type? what are the values on the three diodes used in the power section and bias area? Is there a way I can replace the diodes with a power tube? thanks nathan

2/23/2000 11:26 PM
jason	Go to speedracers site, obsolete electronics. He has a plexi spec 50watt output tranny that is suppose to be the sh%t. He also has a nice page with photos of a plexi layout along with other good info on his marshall tech page. Is there a way I can replace the diodes with a power tube? why not use a rectifier tube instead of a power tube. good luck, jason

2/24/2000 3:57 PM

quote:
"He has a plexi spec 50watt output tranny that is suppose to be the sh%t."

I've tried them out and they ARE the S#!T!!! They sound far better than the Marshall "replacements" everyone else sells. I'd recommend these for anyone looking to build a marshall of their own or for those who need to replace a tranny. I also tried one in my JCM800 50 watter and it sounded FAR better! The 800 50 watter's always seemed a bit "squishier" than the 100 watters, which is why everyone favors the 100 watters IMHO.

Trace

2/25/2000 8:47 PM
pgambon	Check Hoffman's site for board layout. You might just buy one if your not on a tight budget. You could build it using a tweed bassman chassis for mounting in a combo cab. good luck

Page 1 of 2