Amplifier/Receiver Manufacturer:
Hallicrafters
Model:
HA-1 W9TO Keyer
Description:
Primo tube set for this fine keyer - all tubes included (see tube list below)
Amp Bias Type:
not applicable
Tube Quantity in ( )
Rectifier/regulator Tubes:
0A2 (1), 0B2 (1)
Keying logic Tubes:
12AU7/5963 (4)
RF Output Tubes:
none 
Total Tubes in this set:
6