Tubes Asylum

RE: difference in 26 and 27 tube

24.107.155.67

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.

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