Separate names with a comma.
This is the original schematic for the L100 mine came from. The power amp is in the upper right corner. The date codes on the original trannies...
With the original Hammond PT and a 5U4G rectifier, the reservoir sits at about 369V loaded. The schematic says these ran at 330V in the 60s, which...
A non-electrolytic cap could certainly be used, but the form factor would be huge. This is an interesting ball of wax, most definitely.
I found the Hammond schematic for the AO-43. The voltage (turns) ratio is about 34:1, or as the schematic shows it 62:1.8. Squaring that to get...
You know, the more coffee I get in me the more I think a full service, including a full set of caps throughout, might go a long way towards curing...
I don't have the schematic here with me tonight to take a pic of. Here's the vital stats, though. Plate to cathode voltage: 360V Screen grid...
Not so much blocked as sequentially shorted to ground. First cap shunts the majority of the noise to ground, dropping resistor lessens it further,...
Looks like rectifier hash noise. You see a hard spike when the diode conducts, followed by a drop as the diode stops conducting and the cap...
Ok, just to sum up and organize thoughts. The power to the tube looks clean, since the noise is greater on the tube side of the plate loads plus...
Nope, nope, nope, nopeity nope. I've dealt with gooping once, in a pedal, and never again. It makes repairs a nightmare, just like you're suspecting.
Thank you for this so far. I've been running the math on a couple of existing amps so far, and I'm starting to see some trends develop that...
The mind can trick the body into trying to go into shock when presented with the right stimuli. If anyone else remembers the Tom Cruise movie...
The layout should show most of the wires, like the green, yellow, and red, and the red/yellow center tap. Your profile says you're in Iceland,...
How old are those power supply caps? Scope the power supply nodes, and see what kind of AC component is present at each one. Heavy edit: Node C...
How old are those power supply caps? Scope the power supply nodes, and see what kind of AC component is present at each one. There's not a lot of...
