06-28-2018, 12:24 PM
(06-28-2018, 09:40 AM)Eliot Ness Wrote: Although it sounds like you located at least one problem with too much current draw through that resistor.
no,, that was a isolated situation that was not a part of the radio working.
the set still does this.
warms up then i have no control over the crackle and poping on the speaker **WITH VOL all the way down, stations are not tuneable .
i have dongle jumper wired the filiments of each tube excluding the rect and push pulls and powered up.. the noise remains.
when i lift the 220kohm resistor on pin 6 of the 6sq7, the noise goes away.,, and if i turn vol up to max then i can tune to a station.
when i ground the input to the grid of the 6sq7,, the noise & problem remains.
when the set cools down , and all terminations connected, i power up and the set works fine for about a minute.
so far it appears there is a bad socket,,, but ive been told its not really likely with this type of set but "could be" possible.
Three 6SQ7's were used in this socket and all three tubes have the same result.
