This High end tube tester with original manual and one original supplemental tube setting books is considered one of the best bench top tube testers made.
The exterior of the cabinet has some wear and some of the cloth covering has a few rips, and wear marks, the interior is in very good condition. The tube chart rolls perfectly. This tester is very good to excellent condition – the meter and knobs are in perfect condition.
- Checks mutual transconductance for tube quality test which is the most reliable test known.
- Meter has only one scale which makes it easier to read than most other Hickok testers. A multiplier switch is set rather than using several meter scales.
- Handy “Plate 2” button allows for testing double section tubes without resetting selector switches.
- Meter and roll chart are backlit….another feature not found on most Hickok checkers. This feature really makes the tester a joy to use in darker rooms.
- #49 light bulb acts as a bias fuse to protect the sensitive bias potentiometer.
- 2 plate voltages available.
- Life Test button
- Terminals for attaching external self-bias resistor.
- Shorts and leakage are indicated on the meter rather than a less reliable neon bulb.
- Sensitive gas test
- The Model 752A has all of these sockets with the addition of 9 pin and 12 pin compactron, 10 pin decal, and both types of nuvistor sockets
752 and 752A.
These are the famous FAA testers. The 752 is a beautiful machine . The “A” model has the 9 and 12 pin compactron sockets and is more money.
The best feature of the 752’s is the dual triode test buttons-you can test both halves of a twin triode without re-setting the selectors. This is a must, if you test a lot of 12ax7’s – 12au7’s etc
The model 580 is somewhat similar to 752 but really demands a premium price
The Hickok 750, 752 and 752A are a little more costly. All these also have noise tests, and short/leakage tests too! More than one test signal is provided. The 752/752A also allows you to test both sections of a dual section tube without re-setting all the switches for that section of the tube. In addition the 752/752A does not have a short test lamp they use the main Gm meter as an ohm meter and measure leakage in ohms. The 750 uses the short lamp circuit only. All these models have only one power transformer. These do not have a separate AC line set meter so the line sag issue is more prevalent. Again good, reliable, accurate tester.