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Help Please! 38-116 Troubles
#9

OK, I found #111, not where it should be and way out of spec, like 220ohm instead of 25,000 so I changed it out and put it back by the bakelite condenser.

I do have feedback when I touch the top of the 6r7 and I went one step further, the 1 meg resistor in the tube cap circuit that wnet nowhere, well it should go to resistor #111, I did that and my pin #3 voltage on the 6r7 went from 45 volts to 89 volts(spec is 70v) and it did not kill the static like before. Should I be concerned now that the voltage is 10 - 20 volts higher everywhere if the negative bias is pretty much at spec?
Grid voltage still holding at -25.5 by the 6l6's
Static can be controlled by the volume and treble/selectivity but bass compensation has little to no effect. We are making great progress!!
The 20 ohm resistor (your#133) has seen a lot of heat at one point, (all the paint is burned off still checks decent 24ohms), I have a 33ohm would it hurt to put that big of one in?
And yes -25.4 on both 6l6's, voltage on the plate of both tubes are now 300v and at pin 4 they are at 312volts.

Bob


Messages In This Thread
Help Please! 38-116 Troubles - by bm071 - 11-28-2011, 01:54 PM
Re: Help Please! 38-116 Troubles - by 7estatdef - 11-28-2011, 02:31 PM
Re: Help Please! 38-116 Troubles - by bm071 - 11-28-2011, 09:32 PM
Re: Help Please! 38-116 Troubles - by 7estatdef - 11-28-2011, 10:25 PM
Re: Help Please! 38-116 Troubles - by bm071 - 11-29-2011, 01:18 PM
Re: Help Please! 38-116 Troubles - by bm071 - 11-29-2011, 09:38 PM
Re: Help Please! 38-116 Troubles - by 7estatdef - 11-29-2011, 09:55 PM
Re: Help Please! 38-116 Troubles - by bm071 - 11-29-2011, 11:52 PM
Re: Help Please! 38-116 Troubles - by 7estatdef - 11-30-2011, 05:36 PM
Re: Help Please! 38-116 Troubles - by bm071 - 11-30-2011, 10:35 PM
Re: Help Please! 38-116 Troubles - by 7estatdef - 11-30-2011, 11:19 PM
Re: Help Please! 38-116 Troubles - by bm071 - 12-01-2011, 08:06 AM
Re: Help Please! 38-116 Troubles - by 7estatdef - 12-01-2011, 05:51 PM
Re: Help Please! 38-116 Troubles - by bm071 - 12-01-2011, 09:47 PM
Re: Help Please! 38-116 Troubles - by bm071 - 12-01-2011, 10:34 PM
Re: Help Please! 38-116 Troubles - by 7estatdef - 12-01-2011, 11:28 PM
Re: Help Please! 38-116 Troubles - by bm071 - 12-15-2011, 07:40 PM
Re: Help Please! 38-116 Troubles - by 7estatdef - 12-15-2011, 08:31 PM
Re: Help Please! 38-116 Troubles - by bm071 - 12-20-2011, 09:08 PM
Re: Help Please! 38-116 Troubles - by codefox1 - 12-21-2011, 01:40 PM



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