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Tested Matched Pair Sylvania Type 24A Tubes Engraved Base Foil Getters Codes D7R

Tested Matched Pair Sylvania Type 24A Tubes Engraved Base Foil Getters Codes D7R

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$32.95 USD
$32.95 USD
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Tested Matched Pair of Sylvania Type 24A Engraved Base Tubes.
Date Codes D7R.

Tubes are very closely matched for Gm testing (see below), date codes and internal structure - they are identical.

Foil getters with screen mesh plates.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:

Gm Test = 950 and 975 micromhos
Minimum pass/good = 630

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