In my RCA Console K60 the 6F6 gets very hot, metal or glass tube. Nothing else in set including transformer gets as hot or even comes close. Voltages read good. After hours of playing you can hold hand on transformer but you better not touch the 6F6. I kept it out of cabinet for a long time waiting to see if something blew. Then decided to put in cabinet but still I'm concerned. Do I have a problem?

Hi Bill

A 6F6 gets very hot especially the metal version. The tube can dissiplate 17 watts between plate & filament. Almost like a small soldering iron. While using a glass version you shouldn't notice any red color on the plate.

Pin #5 of a 6F6 should be around 20 volts negative in relation to pin #8. If this voltage is missing the tube will run even hotter. This usually causes distortion and excessive transformer heating. The plate may start to glow red.

Norm

:In my RCA Console K60 the 6F6 gets very hot, metal or glass tube. Nothing else in set including transformer gets as hot or even comes close. Voltages read good. After hours of playing you can hold hand on transformer but you better not touch the 6F6. I kept it out of cabinet for a long time waiting to see if something blew. Then decided to put in cabinet but still I'm concerned. Do I have a problem?

Hi Norm,
Thanks for your help. I measure -15.2. Unless something else went wrong, since using the metal 6F6, pin 3 and 4 voltages have increased 26 volts. Pin 3 from 272 to 298 and pin 4 from 281 to 307. Radio plays without distortion and transformer does not heat up.
Bill

Hi Bill
:
: A 6F6 gets very hot especially the metal version. The tube can dissiplate 17 watts between plate & filament. Almost like a small soldering iron. While using a glass version you shouldn't notice any red color on the plate.
:
: Pin #5 of a 6F6 should be around 20 volts negative in relation to pin #8. If this voltage is missing the tube will run even hotter. This usually causes distortion and excessive transformer heating. The plate may start to glow red.
:
:Norm
:
:
:
::In my RCA Console K60 the 6F6 gets very hot, metal or glass tube. Nothing else in set including transformer gets as hot or even comes close. Voltages read good. After hours of playing you can hold hand on transformer but you better not touch the 6F6. I kept it out of cabinet for a long time waiting to see if something blew. Then decided to put in cabinet but still I'm concerned. Do I have a problem?