Up for your consideration are 2 pairs of Made in Holland Amperex ECC88/ 6DJ8 pre-amplifier tubes.
These are labeled as RCA and measure very close to new.
I have 2 pairs and all are made in 1970 and date codes indicate they are 2 months apart in production.
Made in Holland with steel pins, they sound sweet and musical with huge sound stage.
A great upgrade for your tube equipment.
Price is $90 per pair and $160 for all 4, and guaranteed to be low noise.
Shorts Test: Passed
Gas Test: Passed
Matching: As you can see in the Gm values, these are well matched
Listening Test: Very good noise characteristics with no ringing
Gm Test: Both tubes tested like new and closely matched
with no issues (all 8 sections are within 11%). Results are as follows:
Triode Section 1: 12100
Triode Section 2: 12000
Triode Section 1: 12000
Triode Section 2: 12100
Triode Section 1: 12600
Triode Section 2: 11800
Triode Section 1: 12900
Triode Section 2: 12200
Where minimum good is 7750
Value for new tubes is 12500
I guarantee excellent performance, so bid with confidence.
If you are not satisfied with my tubes for any reason, I will issue full refund for your purchase price.
Buyer pays for return shipping (no returns so far).
Priority Mail shipping within US with delivery confirmation is $5.90.
Priority Mail International Small Flat Rate Box shipping is $13.45.
First class mail will cost less. I can ship by First class mail if requested.
All tubes are tested by Hickok 539C vacuum tube tester. This tester was precision calibrated by Roger Kennedy to improve measurement accuracy. 83 and 5Y3 tubes were replaced by Solid State rectifiers to minimize calibration drift in the tester.
I also perform listening tests on these tubes using Music Reference RM-4 pre-preamp (moving coil head amp), which has 30 db gain. This unit uses two 6DJ8 tubes (one for each channel). Each channel uses both sections of the 6DJ8 tube.