tube 77/78

10/27/2009 11:36:42 AMfrank

Does anyone think that a 78 tube may make a substitute for a 77 in a Philco 80

Frank. Doncaster England

10/27/2009 10:46:09 PMNorm Leal

Hi Frank

Each 77 in this radio is used as a detector. A sharp cutoff tube like 77 works better than 78, remote cutoff type. You can try a 78 but signal volume may be low.

Do you have a 6C6? This tube will work in place of a 77 but may require a taller shield.

If you can't find a 77 or 6C6 email for address.

Norm

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:Does anyone think that a 78 tube may make a substitute for a 77 in a Philco 80
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:Frank. Doncaster England
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10/29/2009 1:32:42 PMfrank

Norm. Many thanks for the info. I do have a couple 6C6. I will use this as the replacement - but I have lots of 78's

Thanks again. Frank.

:Hi Frank
:
: Each 77 in this radio is used as a detector. A sharp cutoff tube like 77 works better than 78, remote cutoff type. You can try a 78 but signal volume may be low.
:
: Do you have a 6C6? This tube will work in place of a 77 but may require a taller shield.
:
: If you can't find a 77 or 6C6 email for address.
:
:Norm
:
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::Does anyone think that a 78 tube may make a substitute for a 77 in a Philco 80
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::Frank. Doncaster England
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