Tung-Sol 6520 - test questions - Byrd69

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Tung-Sol 6520 - test questions

I have some Tung-Sol 6520 tubes to test. Doing some research shows it's a version of the 6AS7.

I'm confused by what I'm seeing on my Hickok testers charts.

The 539B wants to test it as a rectifier @ 6.3 volts. No micromho value. Read the Rectifier and Diodes OK area of the meter.

The 6000A wants to test it @ 7.5 volts, with a average new test value of 2600 on the chart.

I'm lost. This is a tube I'm not familiar with.

Who's right or wrong, or both?

Your interest may vary but the results will be same. (Byrd 2020)

I can't compete with the dead. (Buck W. 2010)

Cowards can't be heroes. (Byrd 2017)

Why don't catfish have kittens? (Moe Howard 1937)

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Topic - Tung-Sol 6520 - test questions - Byrd69 09:26:26 02/19/23 (2)

RE: Tung-Sol 6520 - test questions - MP62 17:11:45 02/19/23 (0)

This is what I have found: - John PA 12:26:55 02/19/23 (0)

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