1960's RCA Marked Heintz and Kaufman 6SL7GT ECC35 Tubes - Matched Pair, NOS/NIB, Tested, Matched Codes
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1960's RCA Marked Heintz and Kaufman 6SL7GT ECC35 Tubes - Matched Pair, NOS/NIB, Tested, Matched Codes
These tubes were made by RCA and have black plates, D getters and matched 1960's date codes. Heintz and Kaufman was a tube manufacturer from the 1930's to early 1950's and eventually became a rebrander of tubes.
These were tested on my calibrated TV-7/U. They have been tested for shorts, gas, and transconductance. All of the tubes test with readings of 56/58 and 55/58. Minimum is 32.
They have been sonically tested in my DIY pre-amp and are quiet with no noise or microphonics.
I will combine shipping. Just ask.
I will ship international.
Don't see the tubes you are looking for? Contact me and I may be able to help you.
| Condition | Brand New (New) Brand New items are sold by an authorized dealer or original builder and include all original packaging.Learn more |
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