07-04-2010, 07:21 AM
Hi
The 6J7 is electrically very, very similar to type 77.
http://www.nj7p.org/Tube4.php?tube=6J7
http://www.nj7p.org/Tube4.php?tube=77
Look at the figures for a class A amplifier with 250 volts on the plate and 100 volts on the screen - the figures are almost the same.
I think I would probably reinstall a six pin socket and a 77 tube, but if you leave the 6J7 no harm will occur and the radio should perform as original.
If you do leave the octal socket in place, be sure to ground pin 1 of that socket.
The 6J7 is electrically very, very similar to type 77.
http://www.nj7p.org/Tube4.php?tube=6J7
http://www.nj7p.org/Tube4.php?tube=77
Look at the figures for a class A amplifier with 250 volts on the plate and 100 volts on the screen - the figures are almost the same.
I think I would probably reinstall a six pin socket and a 77 tube, but if you leave the 6J7 no harm will occur and the radio should perform as original.
If you do leave the octal socket in place, be sure to ground pin 1 of that socket.
--
Ron Ramirez
Ferdinand IN
