Yellow Jacket's have internal resistors

Tubes Asylum

Questions about tubes and gear that glows. FAQ

In Reply to: Yellow Jacket Adapter posted by billwendell on January 10, 2024 at 06:05:25:

"They not only rearrange the pin locations of the tubes, but also provide the necessary plate voltage drop and current limiting on the screens as well as blocking the amplifier's grid bias voltage while configuring the EL84 in a Class-A, self-adjusting cathode-bias circuit."

So, they are not just a pin adaptor, they adjust voltage and current as well. For measurement you will have to take this into consideration. It is not a bad thing necessarily, if you have one good known tube you can use as a bogey, you can compare other tubes to it as a %. You will just hot be able to match the expected values on the meter instructions.

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Follow Ups Full Thread

Topic - Yellow Jacket Adapter - billwendell 06:05:25 01/10/24 (1)

Yellow Jacket's have internal resistors - Chip647 06:58:24 01/10/24 (0)

Follow Ups

Yellow Jacket's have internal resistors - Chip647 06:58:24 01/10/24 (0)

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