Ground the grid of the 35L6, see if that stops the buzz.
Lewis
:
:
:Ground the grid of the 35L6, see if that stops the buzz.
:Lewis
Yes, that seems to kill the buzz grounding the grid of the 35L6, so what does that mean? What could cause that buzz? Sounds just like interference from flourescent lights but don't have any on.
::
::
::Ground the grid of the 35L6, see if that stops the buzz.
::Lewis
:
:Yes, that seems to kill the buzz grounding the grid of the 35L6, so what does that mean? What could cause that buzz? Sounds just like interference from flourescent lights but don't have any on.
Does the volume control have any effect on the buzzing, or does it just control the radio stations timed in???
Lewis
We were mainly just still worried about it originating from the audio stage or the power supply, but that sort of cleared ‘em.
I still am heavily thinking of interference, be it AC line, fluorescent or some modern electronics fast switching radiations.
Could also be a microphonic tube, tap each one lightly to see if it makes it worse. Or, hand holding the envelope might
dampen the susceptibility of noise and abate the condition.
How’s about running in a second AM radio in the same position, same station tuning, and plugged into the same AC supply
to see if it is also duplicating that reception quirk.
If so then. . . . . s- l – o- w - l -y . . . .rotate the set 90 degrees to utilize the directional characteristics of its built in loop
antenna and see if the “interference” level nulls down at any point.
Waiting for feedback. . . . . .
73's de Edd
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:
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:We were mainly just still worried about it originating from the audio stage or the power supply, but that sort of cleared ‘em.
:
:I still am heavily thinking of interference, be it AC line, fluorescent or some modern electronics fast switching radiations.
:
:
:
:Could also be a microphonic tube, tap each one lightly to see if it makes it worse. Or, hand holding the envelope might
:
:dampen the susceptibility of noise and abate the condition.
:
:
:
:How’s about running in a second AM radio in the same position, same station tuning, and plugged into the same AC supply
:
:to see if it is also duplicating that reception quirk.
:
:
:
:If so then. . . . . s- l – o- w - l -y . . . .rotate the set 90 degrees to utilize the directional characteristics of its built in loop
:
:antenna and see if the “interference” level nulls down at any point.
:
:
:
:
:Waiting for feedback. . . . . .
:
:
:
:
:
:73's de Edd
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Well, I had just recapped an old Hallicrafters model 38C and runs good with no buzz. So I tried the RCA again and rotated the radio in different directions but still buzzes. I tried tapping on a tube or two and one I tapped on was the 35L6 and at times the buzz would go away. Had another 35L6 handy so tried it and no buzz. Put the old tube back and buzzed then tried the new tube again and no buzz. Looks like that was it. THANKS MUCH, John
:::
:::
:::Ground the grid of the 35L6, see if that stops the buzz.
:::Lewis
::
::Yes, that seems to kill the buzz grounding the grid of the 35L6, so what does that mean? What could cause that buzz? Sounds just like interference from flourescent lights but don't have any on.
:
:
:Does the volume control have any effect on the buzzing, or does it just control the radio stations timed in???
:Lewis
Buzzes about the same even with the volume all the way down. John
::::
::::
::::Ground the grid of the 35L6, see if that stops the buzz.
::::Lewis
:::
:::Yes, that seems to kill the buzz grounding the grid of the 35L6, so what does that mean? What could cause that buzz? Sounds just like interference from flourescent lights but don't have any on.
::
::
::Does the volume control have any effect on the buzzing, or does it just control the radio stations timed in???
::Lewis
:
:Buzzes about the same even with the volume all the way down. John
Bad 35L6, huh? Well, we know what, but I'm darned if I know why.
Lewis