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5 cm) in diameter
to this great piece of history
All of which highly desired by collectors
it belts out some great sound
Great looking post war set
Heathkit TT-1 Mutual Conductance Tube Tester Antenna wire 5 cm) in diameterThe Heathkit TT 1 is a classic, professional grade mutual conductance tube tester, popular in the 1960s for its accuracy in testing tube health (transconductance, leakage) by loading tubes like real equipment, unlike simpler testers. Key features include constant current heater supplies, an ultra sensitive grid current test, and a direct reading ohmmeter. The unit powered up and the meter responded appropriately to a line adjustment The needle falls
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