The Amp Garage

Well... It's actually pretty easy and not very complicated.... Peavey calls it a Texture control. It's basically a post PI volume control for one of the power tubes. You turn the volume off for one of the power tubes, the remaining tube becomes your SE amp output. If you play with the value of the 8...

OK I see! that 6G7 TC is very unusual for a fender design, so it looks like you've got it hooked up correctly then...

Any idea what you'll do with the un-used triode @ V2?

TT

The problem with too high of a temp is that the flux will evaporate before it can clean the surfaces to be joined properly and the soldered joint will be of poor quality.... :oops: You need to know the characteristics of the type of solder you're using, melting point etc, and experiment with temps b...

The tone stack doesn't look right. The bass control looks Voxish but seems to be connected backwards. It also looks like your missing a tone cap, (.1uf?) is the 200k slope resistor supposed to be hardwired to the bottom of the treble control?

TT

There are several ampbuilders that have had good results along those lines..... TopHat amps had some success in building amps with the Voxish + 6V6 formula... Back in the 90's when Dr-Z was building amp exclusively with EL84's I asked him if he'd ever consider building an amp with 6V6's his somewhat...

My ODS footswitch was: relay 1 = Clean-OD / relay 2 = Clean-OD+Midboost...

No reason you couldn't have a Clean-OD+PAB footswitch in addition to a standard Clean-OD switch is there?

TT

De-Tuned_Cabs_&_Amp.JPG Sorry don't have the exact dimensions and I don't have these cabinets anymore but if I recall correctly they were around 11.5" to 12" deep. Ther amphead on top was about 23" wide and would sit suggly on the top some I'm thinking they were ~24" wide. Two of the cabs have 15" ...

There's no phase cancel issues but on thing I found out after building four detuned cabs was if you make the ports too small you're guitar will sound like a bass and you'll shake the walls, windows, and anything not nailed down in the house....

Since the gain in this amp is higher that a AC30 type amp you might want to increase those 100 ohm screen resistors to 1k or higher. KOC recommends 2k.

Also 25W is a bit overkill on the 120 ohm cathode resistors. 10W is more than adequate.

TT

that drawing looks much better layout wise. Each item having its own individual ground. Grounding grids, cathode, signal and filter on the same gain stage close together but keeping each gain stage separate would be the idea Merlin, O'Connor, etc... keep stressing

TT

I maybe using the term "star Ground" a bit loosely but the point is you've got several ground points tied onto your ground lug while other ground leads are running in series. My point is your grounding scheme is non-standard and I've seen this type of grounding cause issues. It may not be your probl...

Your grounding looks "daisy chained" to me; could the way you're using the volume control lug as a star ground point be an issue?

Maybe try adding a grounded copper buss wire, separate the grounds and attach them to the buss....

Just a thought...

TT

That's my drawing.... I put that circuit into a Train-wreckish type of amp I built years ago. I came up with that design due to paranoia involving the thought of HV DC on a mini toggle switch with a metal toggle mechanism on it, which I would have to touch.... Another thing you can do with that arra...

Pretty cool

Like a Williamson amp with tone controls....

TT

It could be a difference in color due to age. Black speaker cones can get bleached by sunlight which can change the color.

What do the cones look like on the back? That should reveal the original color...

TT