Gary, can I steal a idea I got from my Express build and use (3) reverse diodes per tube from pin3 to ground for protection?
I am going to try to lower the voltages tonight!
Scott, I just want to clarify that the you mean to hang that 150k plate resistor from the positive end of the 1.2k 2w (b+4 to b+5) dropping resistors on the filter caps to ground?
Thanks again for the help
Sure the diodes on the plates should not hurt anything. Pretty common protection method. Of course for the purists, HAD did not use them.
Yes, on Scotts suggestion, a 150K to ground at the end of the power supply string will drop things to the correct levels.
Gary
Located in the St Croix River Valley- Afton, MN
About 5 miles south of I-94
aka K0GWA, K0 Glas Werks Amplification www.glaswerks.com
Well, I added a 150K resistor to ground and the amp does sound like it opened up a lot! Dare I say it.....a more complex midrange! Now V1 pin1 voltage is 197v and I am now wondering whether raising the volts a little will make it sound even better. I am down to the last volts! Thanks again for all the guidance.
Thanks again for all the guidance.