05-26-2013, 09:13 PM
Tom,
getting back to your
>>Oh yes, and with respect to the 6J5, do NOT replace with a 6J5GT or 6J5 metal tubes, as they will not insert into the ones that have a tube shield base.
Not sure what you meant by that, but what I have is one "G" and two "GT/G".
Firs of, there was no metal tubes there whatsoever.
And if anything, "GT/G" goes in the shields I have without any problem; "G" does resist, and there is one tube unshielded and two shielded so I intend to use the same as I have now - 2 "GT/G" will go in the shields and 1 will be unshielded, and that can be either "G" or "GT/G" (not metal, I guess, as it may want the case grounded.
The schematic calls for "5J5G".
I could never figure that out: many of those Philco shields fo over shouldered "G" envelope with quite a bit of squeaking and I was always wondering how they did not crack. Even if you install the shield without damaging a tube, thermally it is not good to have metal against hot glass....though they heat up simultaneously so maybe that's OK, but the insertion is still hard.
getting back to your
>>Oh yes, and with respect to the 6J5, do NOT replace with a 6J5GT or 6J5 metal tubes, as they will not insert into the ones that have a tube shield base.
Not sure what you meant by that, but what I have is one "G" and two "GT/G".
Firs of, there was no metal tubes there whatsoever.
And if anything, "GT/G" goes in the shields I have without any problem; "G" does resist, and there is one tube unshielded and two shielded so I intend to use the same as I have now - 2 "GT/G" will go in the shields and 1 will be unshielded, and that can be either "G" or "GT/G" (not metal, I guess, as it may want the case grounded.
The schematic calls for "5J5G".
I could never figure that out: many of those Philco shields fo over shouldered "G" envelope with quite a bit of squeaking and I was always wondering how they did not crack. Even if you install the shield without damaging a tube, thermally it is not good to have metal against hot glass....though they heat up simultaneously so maybe that's OK, but the insertion is still hard.
