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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) | 0.676 lbs. |
 Wiring | All Models |
My Project Lists
Specifications, Files, and Documents
Questions and Answers
Click each question to see its answers.
2 answers
Can this transformer (P-T31) be used to replace a Hammond AO-24158-D in a AO-44 reverb amplifier.
Asked by Anonymous on July 10th, 2017.
We are not techs and are unsure if this will work in the AO-44. The best thing to do is compare the specs of the P-T31 with the AO-24158-D.
no the AO44 is a push pull type amp it uses 2x ecl86 tubes but any output transformer that is push pull type and works for 2 EL84 tubes (ecl86 has 1/2 of a 12ax7 and 1 el84 in 1 tube) should work i think Hammond universal push pull 8w would work plus offer different speaker outputs, the Ao44 was 8ohm speaker only
1 answers
Does this work with a 6V6 tube?
Asked by Anonymous on August 24th, 2016.
By looking at the spec sheet above, this transformer should work with 6V6, 7C5, and 6AQ5/A tubes.
1 answers
How many pins does a 6V6 and 6J5 tube have?
Asked by Anonymous on December 16th, 2016.
Both a 6V6 and a 6J5 tube have 8 pins each. If you are asking how many used or active pins, the answer is different. A 6V6 is a pentode. A 6J5 is a triode.
1 answers
Hi: I want to built an stereo amplifier Hi-Fi with single ended audio transformers, I was searching the store and the frequency response are only
10Khz like for a guitar amp,any audio transformer with a list 40hz to 20Khz?
Thanks
Alfred
Asked by Anonymous on December 16th, 2016.
Most of our current transformer stock will be leaning towards guitar amplification. I would suggest checking out the Hammond offerings as those would have the best chance of meeting your needs.
1 answers
What kind of speaker should I use on the P-T31 transformer. I am restoring an old GE E-61 radio and the speaker and transformer are missing. Hoping this transformer will work, but not sure what kind of 8" speaker I need next.
Asked by Anonymous on December 16th, 2016.
From what I can see you would want to use an 8 ohm speaker with this transformer.
1 answers
What is the distance between mounting holes?
Asked by Anonymous on December 16th, 2016.
The distance between mounting holes is 2-3/8".
1 answers
WILL THIS TRANSFORMER WORK WITH THE 6V6 AUDIO TUBE?
Asked by Anonymous on December 16th, 2016.
By looking at the spec sheet above, this transformer should work with 6V6, 7C5, and 6AQ5/A tubes.
1 answers
Will this transformer work with an El84/6BQ5 tube?
Asked by Anonymous on December 16th, 2016.
Yes, this transformer should work with the El84. We use this transformer with our MOD102 Kit: K-MOD102.
1 answers
If this transformer isn't for the EL84, what one do you recommend for a single end?
Asked by Anonymous on December 16th, 2016.
Hello, this transformer should work with EL84 tubes.
1 answers
Is this transformer current production or surplus stock?
Asked by Anonymous on December 16th, 2016.
Hi, this is a current production transformer.
1 answers
What is the max DC bias for this OT?
Asked by Anonymous on February 23rd, 2017.
The maximum DC bias depends on the tube being used, the plate voltage, and the value of the cathode resistor.
1 answers
How much current can this OT handle?
Asked by Anonymous on March 1st, 2017.
The manufacturer does not provide a maximum current specification. However, our MOD102+ amplifier kit, runs the P-T31 at a current of 35 milliamps with a plate voltage of 242 VDC.
1 answers
What would you recommend as the best sounding speaker for this transformer?
Asked by Anonymous on March 28th, 2017.
Since speaker selection is a very personal choice, it is hard to say what is best for this transformer. I would look for a low wattage 8ohm speaker. For an economical solution SKU: P-A-MOD6-15-8 would be a good choice. If you wanted a large speaker SKU: P-A-C10R would be another option.
1 answers
What is the frequency response of this OT? For example, the low and high frequency -3db points.
Asked by Anonymous on April 21st, 2017.
Unfortunately we do not have the frequency response available for this transformer.
1 answers
Where are they made?
Asked by Screwdriver on November 10th, 2017.
These are made in Mexico.
1 answers
What is the primary side inductance of this device?
Asked by Anonymous on November 21st, 2018.
November 21st, 2018
Staff Member
3.1 H
1 answers
Will the P-T31handle the output of a 6L6 tube?
Asked by Anonymous on July 11th, 2021.
July 13th, 2021
Staff Member
A transformer with a higher power rating would be a better choice since 6L6 tubes can exceed the power rating of this transformer.
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Product Reviews
I'm using this transformer in the recording amplifier on a Lear Wire Recorder, which is very rare, and it is working perfectly!
The second one is a spare, as I have 2 of these wire recorders.
This product is excellent and everyone involved in my purchasing and receiving it were excellent!
Suprisingly good sound from such a small and cheap device. very pleased.