2 Western Electric 271A balloon triodes

 

Welcome to another VintageElectric auction!

All my tubes are 100% guaranteed.

 

Up for sale is a pair of Western Electric 271A balloon triodes. Made in the USA and of vintage production. Early version with hot-stamped bases.

Also known as the "baby" WE 252A; they are a scaled-down version with a indirectly heated filament and was used exclusively in the 78-A, 78-B and 82-A amplifiers.  

Clean pins and quite clear glass overall. Tight bases with no cracks. Halo getters. Gettering is quite good. No loose bits inside. Serial numbers: 1384 and 47F9.

 

Tested on a TV-7D for shorts and grid emission, then finally tested for Gm and Ip.

 

Tested on:

Dan Nelson calibrated Hickok TV-7D.

 

Hickok TV-7D test

Min GM for the 271A on the TV7 is 36.
Very good 50’s test above 50. New test ~58.

Anode current measured during the TV7 test.

GM conversion- 36 = 1800 µmohs. 58 = 2900 µmohs.

TV-7D test results-

 

Mutual Cond

(Gm)

Plate current

(Ip)

Grid emission, gas, shorts tests

Tube 1

56 (2800 µm)

22 mA

PASS

Tube 2

55 (2750 µm)

20 mA

PASS

 

In conclusion-


 

These test as very good tubes. 100% guaranteed. If you are not happy with your purchase, you may return for a full refund. If you have any questions, please ask.

 

 

 

All my items are 100% guaranteed to arrive, as represented, for 30 days upon arrival. My mission is to make you happy with your purchase. All items are professionally packed to arrive safely with no extra handling costs.

 

I've been selling vintage electronics since 1999 with perfect ebay feedback and many happy, satisfied customers.

 

Tested for GM & plate current on a calibrated Hickok TV-7D/U.

 

 

Terms & Conditions:

Payment must be received within 3 days of the auction end date. Items described to the best of my ability. Items 100% guaranteed to arrive safely and be as represented for 30 days. Unless requested, all items will be shipped by U.S. Priority Mail. Heavier items will be shipped via UPS.

 

My guarantee is VOID if you- (A) use these in an circuit not designed to run this part or tube type; (B) use in a circuit that has NOT been restored or serviced.

 

No extended warranties are implied on any item.

 

If you have questions, please call or text me at (-1) 510-504-0634 BEFORE bidding. By bidding you confirm that you have read, understand and accept these terms and conditions.

 

Thank you and happy bidding!