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This is about an hour from me. I feel like kind of an idiot every day I don't buy it.

Peavey Roadmaster - $400

https://syracuse.craigslist.org/msg/d/m ... 63782.html

BrendanK wrote: Wed Mar 22, 2023 7:13 am This is about an hour from me. I feel like kind of an idiot every day I don't buy it.

Peavey Roadmaster - $400

https://syracuse.craigslist.org/msg/d/m ... 63782.html

Yeah the last thing I need is another boat anchor amp but I'd have a hard time passing on this too. That's a lot of amp for not much money. Very cool.

I didn't realize the Roadmaster used 6 power tubes. That's a ridiculous amount of power.

That cabinet though...you'd want casters on it almost immediately. Bring a dolly. Those Scorpions are cool-looking for sure, but sound-wise definitely the weakest link in that rig.

Broken Fender 400PS for $100 in Athens:

https://www.ebay.com/itm/304852325819?h ... SwRsNkGyAH

Used Balls G-50 if anyone is interested. Marshall 2204 circuit that I "fixed" to remove/tame all the stuff I dont like from the 2204.

https://maindragmusic.com/collections/a ... balls-g-50

Nate Dort wrote: Wed Mar 22, 2023 12:15 pm Broken Fender 400PS for $100 in Athens

Man, you would be THE GUY who should get it because that seems like would require intense labor of love/patience/expertise.

You should hit up some of our Athens folks & see if you can get it.

Garth wrote:

Nate Dort wrote: Wed Mar 22, 2023 12:15 pm Broken Fender 400PS for $100 in Athens

Man, you would be THE GUY who should get it because that seems like would require intense labor of love/patience/expertise.

You should hit up some of our Athens folks & see if you can get it.

I had the same thought.

"Will probably never run again, do not get your hopes up."

It's like a fucking challenge. This dude don't know who he's dealing with! Paging Ringo...

It doesn’t seem like there will ever be power tubes for that again, but maybe it could be adapted to use a different power transformer and get the voltages down to what a current production 6550 can tolerate. Probably have to change the dropping resistors so the preamp gets the right voltages. Definitely looks like a challenge.

biscuitdough wrote: Thu Mar 23, 2023 9:12 am It doesn’t seem like there will ever be power tubes for that again, but maybe it could be adapted to use a different power transformer and get the voltages down to what a current production 6550 can tolerate. Probably have to change the dropping resistors so the preamp gets the right voltages. Definitely looks like a challenge.

There are plenty 6550A tubes on ebay...but yeah they are $$$$.

Instead of choking it back, could a Fender 400 PS be modded to take a higher-power tube like a KT88 without a huge mod?

I read up on this amp a few times years ago and apparently it is an ODD DUCK build-wise. Most information I have ever read about this amp is at this Heaven's Gate-style site: http://www.timeelect.com/400-PS-IDX.htm

The original author (also an odd duck) lays out a case after having worked w/ Ed Jahns how "oh this is a special amp and only certain special people should work on this" and how special the 6550A tubes are...and then also has a couple photos up of the chassis with power tubes in them that are CERTAINLY not GE 6550A...
So IDK what to think here. It's a super interesting amp though for sure.

The 010309 tubes in the 400PS are just selected TungSol 6550s (it says it on the schematic). Selected for what? Voltage i'm guessing. The plates in the 400PS are run at like 700V and most 6550s are only rated up to 600V. The KT88, however, is functionally the same tube as 6550 but rated up to 800V. So yes, one could use a KT88 in this place with no mods.

Dr Tony Balls wrote: Wed Mar 22, 2023 12:26 pm Used Balls G-50 if anyone is interested. Marshall 2204 circuit that I "fixed" to remove/tame all the stuff I dont like from the 2204.

https://maindragmusic.com/collections/a ... balls-g-50

I'm actually have tempted to sell my '79 JMP 2204 and buy this.