Transformer - Output, 8 W, Single Ended
Specifications
Power | 8 W |
---|---|
Primary Impedance | 5,000 Ω single-ended |
Secondary Impedance | 8 Ω |
Primary DC Resistance (Red to Blue) | 230 Ω |
Mounting Centers | 2.375" |
Mounting Type | U-bracket |
Weight | 0.7 lbs |
Wiring:
SKU:
P-T31
Item ID:
003561
RoHS Compliant
Item Height | 1.606 in. | ||
Item Length | 2.8 in. | ||
Item Width | 1.9 in. | ||
Mounting Hole Center to Center A | 2.35 in. | ||
Mounting Hole Diameter | 0.187 in. | ||
Mounting Type | U-bracket | ||
Power | 8 W | ||
Primary D.C. Resistance, blue-red | 230 Ω | ||
Primary Impedance | 5 kΩ | ||
Secondary Impedance | 8 Ω |
Packaging Dimensions | 2.8 in. × 1.6 in. × 1.8 in. | ||
Weight (Packaging) | 0.6592 lbs. |
Wiring | All Models |
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Product Reviews
significant high frequency notch around 4k-8k, at least on the one i used
The transformer worked in an old battery operated tube radio.
Worked great thanks Tony
Great replacement for my Antique Radio projects.
Hi
The audio output Xfmr was installed on 1938 old GE radio and it worked perfectly
Perfect match for the amplifier I am building. Good quality and workmanship.
Good price too.
I HAVE NOT TRIED THEM YET. I PURCHASED 2 OF THE XFMRS TO BE ABLE TO CONNECT 8 OHM SPEAKERS TO MY VINTAGE HALLICRAFTER AND COLLINS RADIOS.
Excellent quality great product!
Restoring a 1941 Zenith 7s529 radio. The audio output transformer was “open.” Took a chance and bought the PT 31 transformer. Installed the new transformer and the radio came back to life!! The mounting holes do not line up. Made up my own bracket and good to go! Highly recommend this transformer!!
I have used a bunch of these transformers in a number of single ended audio amplifiers using a variety of final output tubes including the 6F6, 6V6, 6L6 and 12BH7. Projects include a 1939 vintage regenerative receiver, single ended stereo amplifiers and a stereo headphone amp. Testing with a signal generator and an oscilloscope yields a flat response from about 100 Hz up to 20kHz. The roll off is gradual down to about 20Hz. Since my speakers [big Pioneer CS-V9910's] roll off at about 40Hz, these are are ideal , especially for the price. As long as I keep building low-power audio amplifiers, I'll keep using these.