I've decided I'm gonna put a LarMar PPIMV on my 1973 Marshall Super Lead with 6550s. No big deal. I've done them before. But I don't really understand it. I've always just followed instructions and it works. Yay! Lol.
I'm spare-partsing my "kit" though.
The grid leak resistors are 150k for the 6550s. I have a 100k linear dual pot in a drawer. That should be ok, right? A 250k seems to be most often used pot, but it's also most often used with EL34s/6V6/6L6 tubes, which use 220k grid leaks. I'm thinking my 100k pot should be a good enough match for the 150k grid leaks. Am I wrong?
Also, this mod often uses 2.2M "safety resistors" strapped across the pot as a safeguard against pot failure. I don't have any 2.2M resistors, but I have a pile of 1Megs. Could those suffice?
The rest is pretty straightforward. I love this amp. I want to be able to use it without breaking windows.
I'm spare-partsing my "kit" though.
The grid leak resistors are 150k for the 6550s. I have a 100k linear dual pot in a drawer. That should be ok, right? A 250k seems to be most often used pot, but it's also most often used with EL34s/6V6/6L6 tubes, which use 220k grid leaks. I'm thinking my 100k pot should be a good enough match for the 150k grid leaks. Am I wrong?
Also, this mod often uses 2.2M "safety resistors" strapped across the pot as a safeguard against pot failure. I don't have any 2.2M resistors, but I have a pile of 1Megs. Could those suffice?
The rest is pretty straightforward. I love this amp. I want to be able to use it without breaking windows.
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