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In Reply to: 6BQ5/EL84 are there any Beam Tetrode 9-pin equivalents posted by Timbo in Oz on March 18, 2004 at 16:15:11:
What's the plate voltage in the Leak Stereo 20?6BW6: basically a 6V6 type in B9A envelope. Gain is less, so more drive signal is required. Bias resistor change required.
7558: US industrial type, B9A, good for about 20 watts in PP AB1.
6CH6: B9A video pentode, very similar operating conditions with slightly lower power output. a.k.a. CV4055, CV2127. Specs available at retrovox datapage
N78: GEC pentode, B7G. Operating conditions very close to 6BQ5 (within maximum ratings). A 9K PP laod is spec'd, most 6BQ5 spec 8K. a.k.a. CV4062, CV3711. Specs available from TDSL3. Pic shows CV3711
There are a number of other B9A pentodes, usually used for RF or video amplifier service, that will work in audio applications
David Crittle
retrovox.com.au
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- Re: 6BQ5/EL84 are there any Beam Tetrode 9-pin equivalents - critter 19:03:43 03/18/04 (0)
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