[ForSale-Swap] SELL: 115VAC Mini-Variacs 0-132VAC output/2amps

[w2cqm at juno.com]

SELL:  Mini-Variac 0-115VAC input 0-132VAC output @ 2 amps. Perfect for
adjusting critical filament voltage on the 8877's, 3-500's, and the
3cx1200A7's. 3" diameter 2" depth. Shaft mounted. Includes  1/4" shaft
lock. Good idea to install pinouts and an outboard meter to continually
monitor filament voltage to prevent an exponential decline in tube life
due
 to filament overvoltage.   $18+ shipping Ron W2CQM/3