Tube Amp Archive

Thanks guys, for all your comments. I shall re-wire and re-route to address the issues you have highlighted - the photos you've posted are very helpful. I just didn't realise the importance of wire dressing at the time. During this build I've looked at this forum a lot as well as reading and re-read...

Ok - I hope the links to the pics will appear. The dodgy resistor on the input, by the way, is a temporary thing as the kit included one at the wrong value. We didn't know what to do with the unused PT wires, so we heat shrank them and coiled them, as you can see. http://i96.photobucket.com/albums/l...

Thanks for all the input. I've taken some pics and will upload them soon. Here's what I think: Now, let me get my excuses in first! You have to remember that this is my first attempt at an amp build. Also, the chap I roped into helping me on this, whilst highly qualified, has no experience of tube d...

Labb - thanks for the link, nice one. Well, we wired up the OT the other way and, hey presto, she wails! Thanks very much for your help chaps. Just one thing. I know a Tweed Champ is going to hum, but how much is too much? I know it's a difficult thing to describe, but there is quite a lot of hum wh...

Tom - thanks for the input. Regarding the OT being wired out of phase - there was an additional document included in the OT's box saying to wire it opposite to the way the schematic showed - rather annoying if it turns out to be incorrect! I have to say that I don't think the Mojotone documentation ...

paulster,

Thanks for your input - makes complete sense - thought it was a slightly dumb thing to ask!

Thanks again.

Regards,

Retiarius

Thanks soma_hero and Mark for your replies - much appreciated.

May I beg your indulgence and ask a further (possibly dumb?) question: why did the squeal stop when we took out the negative feedback?

Regards,

Retiarius

Hello everybody, I'm building my first amp, a 5F1 Tweed Champ clone from a Mojotone kit. To be honest a friend, better qualified in the safe handling of these things, is actually doing most of it with my 'help' with the hope that I will be able to complete the next build alone. Today we finally swit...

Hello All, This is my first post on this very informative forum. I have a question, and hope it's not a dumb one, it is this: Say if I bought a kit (Tweed Deluxe is what I have in mind) from Weber, or some other supplier, is there anyone in the UK offering a build service? Thanks in advance for any ...