Hickok Manuals Schematics Catalogs. Hickok Electrical Instrument Co. Documentation , Tube Tester Schematic, 12/18/, W, Download. Download HICKOK MODEL TUBE TESTER service manual & repair info for electronics experts. Tube Tester P Equipment Hickok Electrical Instrument Co.; Cleveland, OH, build /, 9 pictures, United States of America, schematics, tubes.

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Report item – opens in a new window or tab. The TV reads out in umhos where the TV-7 reads on a ” quality” scale for gm. Have one to sell?

Tube Tester 532P

The meter at the bottom of the panel shows the difference between the two states and is calibrated in micromhos. If the cathode is 40 volts positive in relation to the grid, that’s the same as saying the grid is 40 volts negative.

Grid voltage is always measured in relation to the cathode. Payment method Buyer protection on eBay. This is a must, if you test a lot of 12AX7’s! Here the wiper of the bias control is shown closest to the positive end of the voltage divider. They are older than the B and C’s, and for this reason it hickoi important to only buy one in good working order, but this tester has been my bench tester for over a year, and Hickpk have gotten to like it a lot.

Learn More – opens in a new window or tab. Frederick Koelsch, a retired chemistry professor at the U of M.

Tube Tester P Equipment Hickok Electrical Instrument Co.;

This Buy It Now listing has ended. The keys to the performance of the Hickok circuit are accurately calibrated potentiometers, a sensitive and accurate Gm meter, and the absolute predictability of hickoj phase relationships of the voltages produced by the secondary windings of the power transformer.


It is classic military construction with potted transformers, ceramic sockets on the minis and octal, and hermetically sealed caps. This item will be posted through the Global Shipping Program and includes international tracking. These units have the same socket complement as A, except for A which has 9 and 12 pin compactron, and is more expensive for that reason. Don’t buy a tester that is recommended gickok hearsay-like “it worked when my uncle had it” or “Ray the radio guy said it’s fine, but I don’t know how to run it”.

The A does not have this. This tester will give you the most repeatable tests. Has switch selected micromho ranges. If most of the screws are gone it means that somebody knowledgeable looked inside and decided the tester was SHOT and there was no point in bothering to put all the screws back in.

A recommended list of Hickok tube testers

The is a beautiful machine. Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab. One of my favorite artifacts at the Pavek is this Hickok classroom demonstrator, donated in by Dr.

It allowed Hickok to produce the best-selling dynamic mutual conductance tube tester on the market until the patent expired in The TV is a nice compact military version Hickok. Learn More – opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc. The cathode of the tube under test is tied to the negative lead of the volt plate supply and to the wiper of the bias control.


Englewood, Colorado, United States. I am not saying that you should not purchase a Hickok like a or at the right price and condition, however in the absence of other considerations, these are good choices. Sign in for more lists.

At this point the cathode and the grid are at the same potential, in other words, zero grid bias. The has sockets up to 9-pin mini. Sep 15, Image not available Photos not available for this variation.

As the 523 on the bias pot is adjusted toward R the cathode becomes positive in relation to the grid. The “A” model has the 9 and 12 pin compactron sockets and is more money. Avoid like monkey plague. The wiper of the bias pot is shown closest to the negative end of the voltage divider across the screen supply.

Rockford, Michigan, United States.

The full military manual comes with instructions regarding the destruction of the tester using explosives, axes, or throwing it overboard, to avoid the tester coming into the possession of an enemy power. Select a valid country.

The B and C units have a “VR” function to give a quantitative test on voltage regulator tubes like 0A2. Back to eBay Home.