freestompboxes.org

Reviving an old thread:

I'll be posting picies of the Thunderfunk 750 head in a little bit. The new big brother to the BH420.

Interesting. How different are they?

Not very. A cleaner layout, more caps...some modernized stuff..Ill post them in a little bit here.

Phone pics..schematics and pcb and transformer

Starting now..

Do it! Hey... wait a minute... will be a puzzle?

A big frikkin puzzle!!!!!

These are NOT in order. I'm too busy today with other stuff to really do that. I will get much better piccies of the preamp traces though. and cap values.

I think 3 pictures per post is good...I dont know the file size limit per post..

I have to take a pause for the cause, but I am thinking I should just put these in a zip file.

I need to take more pictures any hoo.

I want to build the preamp.

chicago_mike wrote:A big frikkin puzzle!!!!!

I like puzzles!
You're right. A zipped file should help for pictures, but a well scanned schemo would be the most appreciated
Maybe you should you start a new thread for the 750

I thought about that... a new thread.

what I don't have access to, is the preamp schematic, unless I can actually get that...pure luck if I can.

anyways, yeah, I need to finish a few things then I can post more piccies.

I crazy enough to build the preamp and maybe try a diy class D output??

Hang on!!!

MODS!!!!! Please Read!!

I wish to start a new Clean thread on this amp and its brothers...

I'll start the new thread this weekend. Maybe we can merge after that??

Guts of an AMP BH 420...

and LOOK!!!! the output board is......ahh...you all know by now.