I Wrecked my Bassman

[Bob-I]

I found this old Bassman on ebay, really destroyed by poorly done mods including a replacement PT. I decided to try using the Express ckt in it.

So I gutted it and put in the board, one tube unused. The input is wired so that if I plug into #1 the V1 triodes are in parallel, plug into #2 and only one triode is active. I wired up a PPIMV which seems pretty effective so far.

It's too soon to say how it really sounds. I put in a pair of JJ EL-34's but the max bias current only gets to 28ma so I need to change out the bias range resistor. I'm running on chinese 12AX7's to see if everything checks out, so far so good.

[drhulsey]

I found this old Bassman on ebay... I decided to try using the Express ckt in it...

Very Cool You took a wreck and made a Wreck

[Bob-I]

Now I've measured the plate voltage at 417, to my mind that's a tad high. I'm thinking that I should put maybe 30V of zener on the CT to drop that down.

I'm thinking of trying to make a BF faceplate with the Fender logo modded from Bassman amp to Basswreck amp. I'm thinking I'll leave teh cab ragged.

[Buschman]

Welcome to the dark side Bob. I think 417v will be fine. The Komet has a higher voltage & sounds great. Much like the Dumble, these are about building a good solid amp & then tweaking to personal taste unless you are building a replica. I have a tough time deciding which amp to take to the gigs. A Liverpool will be next for me.

[Bob-I]

Welcome to the dark side Bob. I think 417v will be fine. The Komet has a higher voltage & sounds great.

Maybe I'll leave it then. I'm sure there are things I can do before messing with B+ Voltage anyway.

I have a tough time deciding which amp to take to the gigs. A Liverpool will be next for me.

I'm in the same boat. On my list to do it to build an amp/head switcher so I can bring more than one head without hauling another cab.

[skyboltone]

Hey Bob:
What's a baseline price on a donor like that?

[Johnhenry]

Bob Said : ( I Wrecked my Bassman )
I Hope the Airbag Deployed Properly Bob
Just Jokin,
Started my first Wreck Style amp in an old KMD head a buddy gave me, got tranny's for a pair of EL34's, Guess i'll spend some time lookin through the thread's here to see what direction to go.
Put a clip up when you get it ironed out Bob, I alway's enjoy hearing your build's,
Johnhenry

[Bob-I]

I paid $200 for the head in pretty poor condition. The guy modded it really badly. Just for fun here's a pic of the filter cap board as I found it under the doghouse. No that lead didn't come off when I removed the board, it was hanging like that.

I swapped V1 with an EH12AX7..... then another after I couldn't control the microphonics. It's much fatter sounding now. I'll have to start going through the tubes one by one and finding the right combination, it makes a huge difference.