This is the sought-after B&K 747B mutual conductance tube tester, one of B&K’s most advanced and user-friendly models. It features true mutual conductance (Gm) testing, allowing accurate evaluation of a
Category: Tube Testers
Restored and Calibrated Tube Testers.
Restored and Calibrated Hickok 600A Tube Tester for Sale – SOLDRestored and Calibrated Hickok 600A Tube Tester for Sale – SOLD
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This Hickok 600A has been electrically restored, serviced, and calibrated. All normal age-related repairs have been completed, and a new replacement meter has been installed for accurate readings. The case and
Restored and Calibrated Conar 224 Tube Tester for SaleRestored and Calibrated Conar 224 Tube Tester for Sale
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This restored and calibrated Conar 224 Tube Tester delivers dependable, accurate emission testing for a wide range of vintage radio and audio tubes. Originally sold as an NRI student kit,
Restored and Calibrated Hickok 6000 Tube Tester for Sale – SOLDRestored and Calibrated Hickok 6000 Tube Tester for Sale – SOLD
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Restored and calibrated Hickok 6000 tube tester featuring a new meter, new polarized power cord, and solid-state rectifier in place of the #83 tube. Capacitors and resistors affecting calibration have
Restored and Calibrated Hickok 600A Tube Tester for Sale – SOLDRestored and Calibrated Hickok 600A Tube Tester for Sale – SOLD
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This restored and calibrated Hickok 600A tube tester delivers accurate transconductance and emission readings with modern reliability. Featuring a new power cord, solid-state rectifier, and socket savers, it’s ready for
Restored and Calibrated Precision 920 Tube Tester for Sale – SOLDRestored and Calibrated Precision 920 Tube Tester for Sale – SOLD
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Precision 920 Tube Tester – Professionally restored and calibrated for accurate, dependable tube evaluation. Includes 9-pin adapter for preamp tubes, rebuilt analyzing leads, and restored original finish. Tests a wide
Restored and Calibrated Hickok 800 Tube Tester For Sale – SOLDRestored and Calibrated Hickok 800 Tube Tester For Sale – SOLD
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Fully restored Hickok 800 Tube Tester – Professionally serviced for long-term reliability and accuracy. Includes new meter, #83 solid-state rectifier, new 1970 roll chart, new power cord, calibration to factory
Restored and Calibrated Hickok 539B Tube Tester For Sale – SOLDRestored and Calibrated Hickok 539B Tube Tester For Sale – SOLD
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Restored Hickok 539B tube tester with replaced capacitors, resistors as needed, and a new tube test roll chart. Fully serviced and tested for accurate, reliable tube measurements.
Restored and Calibrated EICO 628 Tube Tester For Sale – SOLDRestored and Calibrated EICO 628 Tube Tester For Sale – SOLD
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Fully restored and verified with known-good tubes. Capacitors replaced, solder joints checked, contacts cleaned, and resistors verified. Clean, smooth roll chart and includes the original EICO box. A dependable emissions-style
Restored and Calibrated B&K 707 Tube Tester For Sale – SOLDRestored and Calibrated B&K 707 Tube Tester For Sale – SOLD
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B&K 707 dynamic mutual conductance tube tester – fully restored, calibrated, and ready for service. Includes repaired tube settings book.