![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 1](https://rvb-img.reverb.com/i/s--0VVGXf_x--/quality=medium-low,height=800,width=800,fit=contain/gfie93pw025eayrnchud.jpg)
![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 1](https://rvb-img.reverb.com/i/s--aruaSPrC--/quality=medium-low,height=400,width=400,fit=cover,gravity=bottom/gfie93pw025eayrnchud.jpg)
![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 2](https://rvb-img.reverb.com/i/s--5BO8DWVK--/quality=medium-low,height=400,width=400,fit=cover,gravity=bottom/g53anmynw6bbepr6eaaz.jpg)
![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 3](https://rvb-img.reverb.com/i/s--EepD1H_I--/quality=medium-low,height=400,width=400,fit=cover,gravity=bottom/jpm70dstc83qikkvatm5.jpg)
![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 4](https://rvb-img.reverb.com/i/s--EpBFlXps--/quality=medium-low,height=400,width=400,fit=cover,gravity=bottom/pumihxijwfuvgolabtr9.jpg)
![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 5](https://rvb-img.reverb.com/i/s--PdYGv3_X--/quality=medium-low,height=400,width=400,fit=cover,gravity=bottom/hx64slvg9iwwwukfch1b.jpg)
![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 6](https://rvb-img.reverb.com/i/s--UNpzUTP---/quality=medium-low,height=400,width=400,fit=cover,gravity=bottom/ghf8sgbekdbj5ryneoay.jpg)
![Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960 image 7](https://rvb-img.reverb.com/i/s--TLRR55Q6--/quality=medium-low,height=400,width=400,fit=cover,gravity=bottom/dnieqdlrxu7uhy3ob5ur.jpg)
Telefunken 3085:1 [12300 Ohms] Bv. 40.5107.050-32 Bv/Pv Vintage Output Transformer OT 12kOhm into 4 Ohm Tested Tube Amp Audio 1954-1960
Our users rate Reverb
One (1) fully 1.00 kHz AC tested and guaranteed vintage tube amp output transformer. AC testing using an oscilloscope allows us to find and reject transformers with noisy outputs, which a simple resistance or continuity test will not reveal. Made in Germany in 1954-1960 by Telefunken. No IEA date code found. Weighs 0 lbs 8 oz. Center-to-center bolt spacing is 57 mm, and height of casing is 42 mm. Quantity sometimes available - please enquire.
Using a 10V_pp, 1.00 kHz input to the primary coil, we have verified these connections for this vintage transformer:
The turns ratio (pri:sec) is 56:1, leading to an impedance ratio for the main secondary coil of 3085:1. This winding of the transformer would provide a 12300 ohm load resistance to the tube plate if you hook it to a 4 ohm speaker.
Rated at 12kOhm primary and 4 Ohm secondary. This is distinct from SKU O-T050 by its mounting technique: this SKU has screw holes!
SKU O-T050F.
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| Listed | 2 years ago |
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| Condition | Very Good (Used) Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more |
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