I just purchased this beautiful project to get restored and noticed the 2 6V6 amp tubes are replaced with 6K6 tubes, I am not sure if the electronics were modified for this or it was to save money in the past. Since one of the tubes is bad, can I replace it with a 6V6 or will that cause problems? Any ideas are appreciated,'
Thanks

Is this your schematic? http://www.nostalgiaair.org/PagesByModel/358/M0021358.pdf

I do not see any 6V6 or 6K6 tubes listed on the lineup.
Doug

:I just purchased this beautiful project to get restored and noticed the 2 6V6 amp tubes are replaced with 6K6 tubes, I am not sure if the electronics were modified for this or it was to save money in the past. Since one of the tubes is bad, can I replace it with a 6V6 or will that cause problems? Any ideas are appreciated,'
:Thanks

Hi Dave,

If your model number is right, your proper output tubes are 6L6.
Often if a tube like a 6L6 went bad and the repaiman had 6K6 lying around, but no 6L6 he would stick them in to get the radio playing.
The bad match could be a reason why you have a bad 6K6.

As Doug indicated make sure you have the right model number and schematic and make your replacements according to the schematic, not by what is there.
You ought to check the output section for modifications, too. It is unlikely this was done, though.

Best Regards,

Bill Grimm

If we're are, in fact, talking about the 6L6 output tubes, then it would be best if they both were the same type. They are in a push-pull circuit.
Doug

:Hi Dave,
:
:If your model number is right, your proper output tubes are 6L6.
:Often if a tube like a 6L6 went bad and the repaiman had 6K6 lying around, but no 6L6 he would stick them in to get the radio playing.
:The bad match could be a reason why you have a bad 6K6.
:
:As Doug indicated make sure you have the right model number and schematic and make your replacements according to the schematic, not by what is there.
:You ought to check the output section for modifications, too. It is unlikely this was done, though.
:
:Best Regards,
:
:Bill Grimm

:If we're are, in fact, talking about the 6L6 output tubes, then it would be best if they both were the same type. They are in a push-pull circuit.
:Doug
:
::Hi Dave,
::
::If your model number is right, your proper output tubes are 6L6.
::Often if a tube like a 6L6 went bad and the repaiman had 6K6 lying around, but no 6L6 he would stick them in to get the radio playing.
::The bad match could be a reason why you have a bad 6K6.
::
::As Doug indicated make sure you have the right model number and schematic and make your replacements according to the schematic, not by what is there.
::You ought to check the output section for modifications, too. It is unlikely this was done, though.
::
::Best Regards,
::
::Bill Grimm

The schematic definitely calls for 2 6V6 tubes, but a technician did work on this radio in 1981, from an invoice I found near the chassis, and he put in 2 6K6 tubes. I cannot tell how he modified the chassis as I am not that knowledgable. The radio just humms, so I am going to replace the caps he shows he replaced and then see what happens. All the other tubes are the same as the schematic. Perhaps he saved the previous owners on cost?

::If we're are, in fact, talking about the 6L6 output tubes, then it would be best if they both were the same type. They are in a push-pull circuit.
::Doug
::
:::Hi Dave,
:::
:::If your model number is right, your proper output tubes are 6L6.
:::Often if a tube like a 6L6 went bad and the repaiman had 6K6 lying around, but no 6L6 he would stick them in to get the radio playing.
:::The bad match could be a reason why you have a bad 6K6.
:::
:::As Doug indicated make sure you have the right model number and schematic and make your replacements according to the schematic, not by what is there.
:::You ought to check the output section for modifications, too. It is unlikely this was done, though.
:::
:::Best Regards,
:::
:::Bill Grimm
:
:The schematic definitely calls for 2 6V6 tubes, but a technician did work on this radio in 1981, from an invoice I found near the chassis, and he put in 2 6K6 tubes. I cannot tell how he modified the chassis as I am not that knowledgable. The radio just humms, so I am going to replace the caps he shows he replaced and then see what happens. All the other tubes are the same as the schematic. Perhaps he saved the previous owners on cost?
I meant 6L6, nor 6V6 as the correct tubes, sorry.
Dave