Hickock Mod 121 Cardmatic Transconductance Tube Tester
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Hickock Mod 121 Cardmatic Transconductance Tube Tester Picture(s) and Description:
This listing is for a Hickock Model 121 Cardmatic Transconductance Tube Tester. This is probably the very best, rarest and easiest-to-use Hickock Tube Tester of all. In addition to the usual advantages of the Hickock, tester, this one takes all of the work out of the testing process.It does this by using a set of pre-punched data cards, in the tray to the front of the tester. These cards set the correct pins to the various sockets. The cards set the Filament voltage, Plate voltage, Grid voltage, EVERYTHING. You just plug in the Data Card, and the tube and then push the Test button. It even allows you to test dual section tubes with only one data card by pressing the button marked "4". This switches the data settings to measure the other half of the tube. This is an excellent true Mutual Conductance Tester that actually gives useful information. It also tests semiconductor diodes, selenium rectifiers and transistors! It can test any tube whose pinouts are available and whose electrical characteristics are known. You could even use clip leads to test tubes whose sockets are not available. This tests all 4, 5 and 6 prong legacy tubes plus Loctal and Octal and 7, 9 pin miniatures. No Roll Chart is needed! Cosmetically it is in very good condition . It would be rated excellent but someone dinged the top of the case. The actual case is excellent but has the din, as you can see. Inside, this tester looks like it has never been used. This has a full set of data cards. I think it would be easy to make up data cards for tubes that may not be in the bin with a card punching tool. This Tube Tester is 100% Solid State, so no finicky and hard-to-find type 83 rectifier needed! It is sold guaranteed properly working. I show it testing a known good 6SN7 tube.This is a mighty impressive tester. This comes with the original Owner's Manual, with all operating instructions, operating theory, schematic etc. It even has the warranty card. NO EMAILS WILL BE ACCEPTED IF THEY DO NOT COME THROUGH EBAY'S EMAIL SYSTEM. PLEASE PASS ALL CORRESPONDENCE THROUGH EBAY. NO OTHERS WILL BE RECEIVED. If there are any problems in your getting your winning bidder email, call me immediately on the telephone number I have on file at Ebay. Dukeshifi does NOT make use of the "Second Chance Offer" method of selling. If you receive such an offer for any item sold by Dukeshifi, it is NOT from Dukeshifi! NO EXCEPTIONS!!!! SquareTrade © squaretrade warranty v2.0 On Dec-13-09 at 09:41:46 PST, seller added the following information: SquareTrade © AP6.0