Here are (4) RCA made in USA 12AX7 long black plates twin triode's that I have tested on my Heathkit TT-1 Mutual Conductance tester. The minimum for a good 12AX7 tube on this tester is 1040. They test

 

Thanks for viewing this auction for North American buyers for a 65 piece lot of vacuum tubes including balloon 30 nib, (2) c484 Cardon, 24, 324 as examples. They have been made by various manufacturer

 

You are bidding on the January 1920 issue of Electrical Experimenter magazine. Published by Hugo Gernsback. It is in good condition. Some wear on spine. Please email me with any questions. Buyer pays

 

It is brand new looks like and has never been used or installed from what I can tell. Based on the condition of the bottom, there is a possibility that it may have been refurbished. I received it exac

 

KELLOGG 5 BAR CRANK TELEPHONE RINGER BOX....UNIT IS COMPLETE AND IN GOOD CONDITION...IF YOU WANT JUST THE PARTS WITHOUT THE CASE TO SAVE ON SHIPPING I WILL DO THAT FOR YOU.....HAS U.S.F.S. STAMP ON BA

 

Hi! Please consider this Edison 2 minute wax cylinder. Entitled - "Two Rubes at the Circus", it will come to you in its original case - both cylinder and case are marked #8773. This cylinder has a nic

 

Look at this super nice zenith rare find six band..solid state and in great shape and works well...wow nice multi band radio..and great name....the continental...nice old find...........I was just lis

 

PLEASE CHECK OUT MY OTHER AUCTIONS FOR RELATED ITEMS, SEE WINDOWS BELOW. BID WITH CONFIDENCE! If you are dissatisfied with your purchase of this item, I will refund your purchase price and original sh

 

Confirming reception of the SW outlet of the famous Cuban broadcaster, CMQ on 9750kHz. In good condition.

 

VERY HARD TO FIND AE MONOPHONE TOOLS , the tools where a must for telephone repair and installation people. The tools where used from 1930 on for a variety of phones.