tubedogsmith wrote:Man, what a pain in the ass it must have been soldering those tube sockets to those boards with those short wires like that.
Looks like the other 9 pin mounting holes are threaded...
if that's the case maybe wire the socket to board then install in chassis.
This is what I can see...not sure this is any help
I did add a 220k not on the layout?
Added Mr. Webers version of tremolo which I think is close to the AB763
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Last edited by dcribbs1412 on Wed Aug 22, 2012 10:57 pm, edited 1 time in total.
Trem circuit to me favors a Magnatone M-10 that has been modified with a bug.
Mike I don't have a schematic of this version Magnitone..Can you please post it
Tony
Tony, I found it in Vol 3 of Pittman's book on page 568. The couple of soft copies I've found on the net to be scanned from it and the resolution is so poor when enlarged. I'll try to scan it or possibly just hand draw it.
dcribbs1412 wrote:
This is what I can see...not sure this is any help
Change the 27K, 82K to 270K and 820K. I still say that Piher is a 22K vs 2.2K.
Trem circuit to me favors a Magnatone M-10 that has been modified with a bug.
TM
Thanks TM
guess I'm yellow blind...I see what you are saying about the possible orange band on the piher marked 2.2k on the layout.
Not sure if this is the M10 you are referring to.
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dcribbs1412 wrote:
This is what I can see...not sure this is any help
Change the 27K, 82K to 270K and 820K. I still say that Piher is a 22K vs 2.2K.
Trem circuit to me favors a Magnatone M-10 that has been modified with a bug.
TM
Thanks TM
guess I'm yellow blind...I see what you are saying about the possible orange band on the piher marked 2.2k on the layout.
Not sure if this is the M10 you are referring to.
That's the one, the M10a. If nothing else, there sure are plenty of common values between the two.
Here's a collage of the working layout, the gut shot (enhanced) and the AB763 trem section. Note the 220k in the gut shot I added to the layout. I also think maybe the two large resistors shown as 470 may be 47k? I don't see the cathode bypass caps (25uF electrolytics), unless they are the brown pair of things and they are tantalum caps?
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Last edited by martin manning on Thu Aug 23, 2012 9:41 am, edited 1 time in total.
Many companies use LDR's for relays..Since there are no mechanical contacts and the dark resistance is very high and don't have a dead short so there is no need for the 22m (popping)resistor..They can be extremely quiet and great for high gain channel switching amps..I Know Soldano uses them..
Tony
Last edited by talbany on Thu Aug 23, 2012 1:47 am, edited 1 time in total.
" The psychics on my bench is the same as Dumble'"
talbany wrote:Many companies use LDR's for relays..Since there are no mechanical contacts and the dark resistance is very high..They can be extremely quiet and great for high gain channel switching amps..I Know Soldano uses them..
AKA Vactrols- I've seen them in Fender and Crate channel switching amps too.
