The Amp Garage

The actual problem as it turns out, after pulling main and tube pcb, there was some crud residue at the solder joints at each end of the ribbon cable causing a short between grid and plate. Cleaned crud. Amp works.
Thank you for responding

Pins 1 and 6 both measure about 4vdc. Over 200vdc dumping across plate load resistors. 1-Changed plate load resistors,no change 2-Checked filament voltage between 4-9, 5-9. Normal 3-Checked continuity from tube socket to corresponding parts on pcb. All good. 4-Cathode resistors check out and are gro...

Am I correct in thinking a dot is missing from this schematic to indicate a connection?

These are multisection can caps in the originals, so getting bleeders in the right place is non-trivial. If you use modern Mallory twist-lock caps, they no longer come with heavy black insulator sleeves, so the "top" cap case will sit at half the B+. You can't let it ground. If you touch it, it wil...

what a terrible idea to take something that is a thing of vintage perfection and hack it. Really bad idea.

mhartman wrote:Here's a schem that I found on the web a while back. I'm not sure if it is accurate or not, but it might be helpful to you.

not accurate

[img576]http://i967.photobucket.com/albums/ae15 ... lphaop.png[/img]

I think it is sdo if there is such a thing or sdq

inside

inside

inside

inside

inside

inside