REFURBISHING AND CALIBRATING. THE PRECISION 612 TUBE TESTER. The precision model 612 is a combination tube and battery tester that, although employing only simple, straightforward (some would say "classic") vacuum tube emission testing circuitry is very well constructed of high quality components including a hefty, well made power transformer and rugged, durable switches.
Feb 18, 2016 · Leeds Radio, Selling tubes and electronic parts since 1923. Leeds Radio . 175 Walnut Avenue, Bronx NY 10454. email Leeds ...
Jul 06, 2020 · Connect the grid lead to the remaining cap on the tube. Note C: Set the MICROMHOS switch at 6000 when testing this section if the tube tester bears either Order No. 27613-Phila-44-52 or 52346-Phila-45-10 on the nomenclature plate. Note D: This test is only a partial indication of a good tube. A complete test is only possible when using equipment.
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Mercury Model 202 Tube Tester. I picked this up in Sudbury Ontario and it was full of tubes. The top was long gone but I found the one here at a radio swap meet in Guelph for $5. A good friend was able to reproduce the plastic sign and now it's working great. Great tube storage but takes up a lot of room.
Sep 11, 2010 · Even the best old tube testers only did a so so job of matching tubes. That's because most tube testers only put about 250V on the plates of power tubes. Today, there are two modern testers, the Maxi-Matcher and the Amplitrex-AT1000. Both of these are several thousand dollars each.
I am selling one Stark 9-55 tube tester in fair condition. I don't have the manual for it. It comes with a GE data book that has hand written test data for most of the common audio tubes. I test a few tubes and it is working ok. Prefer local pickup.
Demonstration of testing a power amplifier output tube using an EICO 666 portable tube tester. Shot in full 4K ultra HD.
Alibaba.com offers 1,747 tube tester products. About 16% of these are Testing Equipment, 0% are Other Electronic Measuring Instruments, and 0% are Industrial Metal Detectors.