01-01-2018, 02:44 PM
So the Ampeg is back on the bench. I decided to do a couple of things:
- change back to one cathode bias resistor and cap shared between the two 6V6 tubes. The value was 300 ohms originally, and I changed that to 680 ohms to lower the plate current to get the tubes output power down a little (explained earlier).
- replace the speaker with a Ted Weber replacement for an original Jensen P12Q. I am waiting for the speaker to arrive.
I decided against rebuilding the old Jensen speaker, which actually sounds quite excellent, but I thought I would never know if the speaker was holding me back unless I try this swap.
Larry
- change back to one cathode bias resistor and cap shared between the two 6V6 tubes. The value was 300 ohms originally, and I changed that to 680 ohms to lower the plate current to get the tubes output power down a little (explained earlier).
- replace the speaker with a Ted Weber replacement for an original Jensen P12Q. I am waiting for the speaker to arrive.
I decided against rebuilding the old Jensen speaker, which actually sounds quite excellent, but I thought I would never know if the speaker was holding me back unless I try this swap.
Larry