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to this great piece of history
it belts out some great sound
It has now been wired to take a number of 9 volt batteries and a 1
Great looking post war set
It now has Bluetooth and FM functionality with aux input or Bluetooth transmitter
Heathkit TT-1 Mutual Conductance Tube Tester Antenna wire to this great piece ofThe 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
