gibosi
Headphoneus Supremus
- Joined
- Oct 18, 2012
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Have begun to roll 6A6 today. First up is a tube labeled as a Tung-Sol, but as I have seen RCA's with the same construction, specifically those cross-shaped mica spacers, it could be a rebrand. The 6A6 uses a medium 7-pin U7B base, also referred to as a UX7 base, instead of the more common octal base, so an adapter is necessary. This tube preceded the 6N7 and they are electrically identical. In fact, early 6N7G's appear to be nothing more than 6A6 bottles shoved into an octal base.
The 6A6 and 6N7G are very similar to the ECC31, with powerful heaters, a common cathode, and designed to operate as a push-pull Class B2 audio amplifier in radios of the late 1930's, hence my interest in rolling these.
It sounds pretty good, but it has been up and running for less than an hour, plus I have my "burn-kit" installed (a pair of mismatched RCA 6AS7's with different construction and a Sylvania 3DG4 regulator) so I can't say anymore at this time.
The 6A6 and 6N7G are very similar to the ECC31, with powerful heaters, a common cathode, and designed to operate as a push-pull Class B2 audio amplifier in radios of the late 1930's, hence my interest in rolling these.
It sounds pretty good, but it has been up and running for less than an hour, plus I have my "burn-kit" installed (a pair of mismatched RCA 6AS7's with different construction and a Sylvania 3DG4 regulator) so I can't say anymore at this time.