Mullard XF2 EL34 PAIR Blackburn *AMPLITREX TESTED* Adzam 6CA7
USD $275.00
Condition : Used
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Up for sale is a nice vintage pair of vintage Mullard XF2, single halo getter EL34’s.
B1C3, B1C2 white acid date codes..(Blackburn factory). These were Adzam branded.
Fully Amplitrex tested at 3 different voltages to give you an idea of the plate currents at those values. See images for results. More info below:
Please read about how i test power tubes:
These EL34s were tested at 3 different plate voltages: (265V, 450V, 500V) in fixed bias, computer controlled tests. I run the B+ for 5-10 mins to fully warm the tube up and then run the test.
Images show all test sheet results of each voltage.
(FYI: Run time timestamps are wonky on the printouts because when you stop the B+ warmup and switch to test mode, it resets the counter. Tests were run immediately after the warmup.)
My buy-it-now asking price reflects the amount of time it takes to test this way.
If you are using these in a guitar amp, please have someone who knows how to properly bias them for the install. Trying to plug and play or just swap out power tubes can cause damage to the tube and or amp.
Tube history: These had very light use in an audiophile amp. (CJ Premier 11).
I will guarantee the test results to match other Amplitrex AT1000 testers using the same parameters ONLY.
Due to the nature of vintage vacuum tubes and tube rollers abusing Pricetronics return policies, these are being sold AS-IS, no returns accepted. I will guarantee them to NOT be DOA.
These will ship in generic white boxes via USPS PRIORITY MAIL.
Be sure to check out my other listings for more tubes for sale.
Thanks for looking!!
B1C3, B1C2 white acid date codes..(Blackburn factory). These were Adzam branded.
Fully Amplitrex tested at 3 different voltages to give you an idea of the plate currents at those values. See images for results. More info below:
Please read about how i test power tubes:
These EL34s were tested at 3 different plate voltages: (265V, 450V, 500V) in fixed bias, computer controlled tests. I run the B+ for 5-10 mins to fully warm the tube up and then run the test.
Images show all test sheet results of each voltage.
(FYI: Run time timestamps are wonky on the printouts because when you stop the B+ warmup and switch to test mode, it resets the counter. Tests were run immediately after the warmup.)
My buy-it-now asking price reflects the amount of time it takes to test this way.
If you are using these in a guitar amp, please have someone who knows how to properly bias them for the install. Trying to plug and play or just swap out power tubes can cause damage to the tube and or amp.
Tube history: These had very light use in an audiophile amp. (CJ Premier 11).
I will guarantee the test results to match other Amplitrex AT1000 testers using the same parameters ONLY.
Due to the nature of vintage vacuum tubes and tube rollers abusing Pricetronics return policies, these are being sold AS-IS, no returns accepted. I will guarantee them to NOT be DOA.
These will ship in generic white boxes via USPS PRIORITY MAIL.
Be sure to check out my other listings for more tubes for sale.
Thanks for looking!!
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