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6SK7 / 6SK7GT and Other Glass/Metal Tubes
Phlogiston
Radio-Fixer-Upper
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Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
#11

12-16-2020, 06:37 PM
See this auction on Pay-Bay:

https://www.ebay.com/itm/Pair-GE-6J5-Met...%3A2334524

He states the 6J5tubes test at  2300 with a spec of 2600, which is the value for a gt. The RCA manual says that his tubes would test new at 3000. This would lower the value from 86% of spec to 76% of spec. He is probably testing to the single, Hickok test value.

This would take those tubes from "strong" to meh...
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Messages In This Thread
RE: 6SK7 / 6SK7GT - by Nathan Slingerland - 12-16-2020, 12:52 PM
RE: 6SK7 / 6SK7GT - by Phlogiston - 12-16-2020, 01:11 PM
RE: 6SK7 / 6SK7GT and Other Glass/Metal Tubes - by Phlogiston - 12-16-2020, 06:37 PM



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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment