Another 5F1 Amp mod question - 6L6 mod

[leevc5]

I was looking at a Vibro Champ schematic with a 6L6 in it. It had a 5U4 rectifier, I'm wondering if I replaced the 5Y3 rectifier with a 5U4 and the 6V6 with a 6L6 if I'd get the few extra Watts and headroom of a 6L6. Any opinions?

[jeremy]

Re: Another 5F1 Amp mod question - 6L6 mod

output tranny is still the same. youll get more clean headroom and a different tone but the overall volume will only increase a little id guess. the 5u4 also pulls more from the power tranny so be careful

[leevc5]

Re: Another 5F1 Amp mod question - 6L6 mod

The fuse should protect my PT shouldn't it. I don't want to try this if I'm running the risk of blowing the PT those things cost as much as the rest of the amps combined.

[jeremy]

Re: Another 5F1 Amp mod question - 6L6 mod

should yes. if you know the model pt, look up the specs and see how much 5v current you have available

[leevc5]

Re: Another 5F1 Amp mod question - 6L6 mod

3 amps. Won't work, 6L6 / 5U4 circuit needs 6.3 amps.
Thanks leading me in the right direction.

[jeremy]

Re: Another 5F1 Amp mod question - 6L6 mod

ive use a 5v4 in my tweed deluxe without issue, it will raise the voltages some and give you less sag

[leevc5]

Re: Another 5F1 Amp mod question - 6L6 mod

Maybe I'll try a 5V4 it draws less 5V than the 5U4. Are you using a 6L6 with your 5V4?

[jeremy]

Re: Another 5F1 Amp mod question - 6L6 mod

not currently but i have in the past. the 6l6 is a different tone but its not much louder at all. going from the 5y3 to 5v4 made as much of a difference as the power tube swap

[leevc5]

Re: Another 5F1 Amp mod question - 6L6 mod

I found a cool little amp project. The xfmrs and such are only about $75, I have most of the tubes and I don't think the resistors and caps will cost more that $25. In the end you get an 18W+ dual 6L6 guitar amp:
http://www.lh-electric.net/projects/17gita.html
Am I missing something?