proximity of OT to speaker frame in combo amp

[steve-o]

Hey all!
Anyone with knowledge of the spacing needs for the OT and speaker frame? In my 18 watt combo I'm building (with the frame/chassis) from my blues Jr., the OT is about 1/2 inch from the metal frame of my speaker. When I hold the OT in place, I can feel a magnetic pull. This can't be good, can it?

So, do I need to move the tranny? If so, should I move it vertically (toward the tone pots)? Or horizontally (away from the center of the chassis)?

This is my first build, and I have to say, this amp building thing is fairly addictive. I remember, before I decided to take the plunge, reading this forum and thinking y'all had too much free time. Now, I'm having to make myself stop to do housework, sleep, etc...

Thanks for your help!
steve[/img]

[David Root]

I see you're already developing the right attitude to build tube amps! Now all you need is to develop a taste for the smell of solder flux smoke in the morning!

Seriously though, so long as the iron doesn't physically interfere with speaker frame, don't worry about it. If you take a look inside a lot of old combo amps you'll see some pretty close fits sometimes. I just finished a rather overstuffed BFDR chassis with an oversize OT which barely misses the speaker frame in a BFDR cabinet. Amp sounds great, don't sweat it!

And if I could add one more tip, after becoming a competent solderer, next master the art of grounding design and layout, it will make the rest of the learning experience much more productive! (Ask me how I know this). drz400 is the expert on this forum IMHO. Oh, and always remember, if you're going to steal, steal from the best!

[pila]

I know what you mean by addictive Steve... I built my first amp in 1953 in Germany while in the military. I did it because of thier 220 volt ac line voltage, and got tired of lugging an auto-transformer around to reduce to 110 volts.
Then, it was about three years ago I built a Valco clone. (shoulda stopped there!) Last November I built a 5E3 tweed Deluxe ( had a lot of problems) then two more Valco clones,using a Hoffman type turretboard I designed for the Valco circuit. Lastly, a Fender Princeton Reverb clone, which came out excellent. I'm trying to do something else for a while, while I make room for all these amps!
PILA