Identical Matched Pair-RCA 7591A power output tubes. TV-7 test super strong.

Description

Identical Matched Pair-RCA 7591A power output tubes. TV-7 test super strong.
Identical Matched Pair-RCA 7591A power output tubes. TV-7 test super strong.
Click images to enlarge
Description
Identical Matched Pair
(Gm/Plate Current)
RCA
7591A
Power Pentode Output tubes.
TV-7 test super strong.
Up for bids is a pair of RCA branded, type 7591A power pentode output tubes.
The 7591A is used in high-end, high-quality audio applications.
Except for the style of base labeling, they are identical in appearance and construction.
They have "chrome-top" flashing, halo getters and three hole gray plates.  Both bases are tight.
These RCA branded 7591A's were tested on my Dan Nelson calibrated TV-7/U tube tester for transconductance (Gm), noise, gas, and shorts using a digital meter that also measures plate current draw.
The TV-7/U minimum recommended value (65%) for the 7591A is 36 (Gm=4500).
As pictured with TV-7/U readings, Gm, plate current draw and date codes/dates:
TV-7/U       Gm         Plate Curreent     Date code/date
1.     73          9125             36 mA              CP  Sept 1969
2.     68          8500             35 mA              BP  July 1967
From a Gm standpoint, both tubes match within 6.9%.
Plate current draws match within 1 mA (2.8%).
Click on any picture to enlarge it and get a better look at these tubes.
They will ship in sturdy tube cartons, double bubble wrapped and carefully packed to ensure safe delivery.
All test results are guaranteed to be accurate however no warranty is expressed or implied as to how tubes will perform in any audio application.
Please visit my other auctions. When possible, I can combine into one shipment, up to five auctions purchased on the same day and save you money on shipping.
Read my feedback!
I pack and ship to you, the way I would want you to pack and ship to me. I
strive to ensure your entire buying experience rates 5 stars.
Winning bidder makes payment within 2 days
of the auction with USPS First Class Mail delivery.
Please read the "fine print" below.
Thank you for bidding & Good Luck!
1. Questions?? Please contact me BEFORE bidding!
2. As with all used electronics, this item, unless stated otherwise, is
sold as-is with no guarantees.
3. Returns are only accepted where
my description was inaccurate.
The pictures are a major part of the description. Enlarge and preview them before bidding, please.
4. Payment to be received within 2
days
of the auction.
5. Winning bidder in the State of Florida adds 7% sales tax.
Get images that
make Supersized seem small.
Showcase your items with Auctiva's
Listing Templates!
THE simple solution for eBay sellers.
Track Page Views With
Auctiva's FREE Counter