- RE: difference in 26 and 27 tube - jonusgrumby 09:38:21 11/09/09
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- In Reply to: RE: difference in 26 and 27 tube posted by wdewolfe@pacourts.us on November 06, 2009 at 11:08:23
The 37 is a 6.3 volt version of the 27. The 56 is basically the same as a 27. The 76 is slightly different and has a slightly higher gain. The 6P5 is a 76 in an octal base.
All three tubes, the 27, 37 and 76 all have lower plate dissipation than the 6SN7. Typically the dissipation is 1 watt maximum for them.
I've used all these tubes and they are capable of very low distortion when biased with a 150 to 175 volts on the plate and 3 to 4 mA bias.
I know the 26 is popular, I have not used it.
Good luck.
- RE: difference in 26 and 27 tube - thermionic addictions 10:20:24 11/07/09
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- In Reply to: RE: difference in 26 and 27 tube posted by wdewolfe@pacourts.us on November 06, 2009 at 11:08:23
How about the 6F8-G? It is a 6SN7-GT in an ST bottle. The only drawback is, it has a grid cap. So, you would have to rewire.
Cal
Edits: 11/07/09
- RE: difference in 26 and 27 tube - Caucasian Blackplate 12:34:02 11/06/09
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- In Reply to: RE: difference in 26 and 27 tube posted by wdewolfe@pacourts.us on November 06, 2009 at 11:08:23
The 27, 37, 56, 76 can more or less be substituted for half a 6Sn7, although something like a 6J5 or 6P5 would have the same look and work in an octal socket.
The 26 is a directly heated tube, and not even close to a direct substitute.
- 26 is a DHT while the 27 is an IDHT... - Ivan303 11:15:43 11/06/09
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- In Reply to: RE: difference in 26 and 27 tube posted by wdewolfe@pacourts.us on November 06, 2009 at 11:08:23
HUGE difference.
Boats and Fish!
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