POWER TRANSFORMER DYNACO for ST-70 PA-521 060Original version

Availability: In stock
Delivery date: Immediate
Manufacturer: Hammond Manufacturing
$212.80

New unit MADE IN USA by transformer professionals with decades of experience manufacturing high voltage transformers.

Improved replacement 240/120 volt dual primary export power transformer. Heavier construction, runs cooler, gives better regulation, won't buzz and hum like some originals do. Bolts in to ST70 with the same hole on the chassis.

Also could be used to make a 70-90W mono power amp (depending on output tubes and rectifier) using the our output transformer. Secondary B+ winding is 720VCT (360-0-360) at 300mA with 55V bias tap, plus two 6.3VCT 5 amps and one 5V 4 amp tube filament and rectifier windings. Can use solid state rectifiers or any single tube rectifier with filament up to 5V at 4 amps (or 2 5AR4/GZ34 could be used in parallel) and sufficient B+ current rating. Usually 5AR4 or 5U4. Note, watch that the voltage isn't above capacitor ratings if solid-state rectifier is used!
Primary 240VAC or 120VAC 50/60 Hz.
Mounts original dimension. Nice long insulated leads.

Characteristics:

Primary: 240/120V
Secondary 1: 360-0-55-360V 300mA
Secondary 2: 6,3V 5A
Secondary 3: 6,3V 5A
Secondary 4: 5V 4A

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