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Tips on Audio Interstage Transformers – Philco Library
https://philcoradio.com/library/index.php/shop-talk/general/tips-on-audio-interstage-transformers/
The primary of the audio interstage transformer always has DC voltage across it, which feeds the plate of the Type 27 audio amplifier tube. It is the primary winding of these audio interstage transformers which usually goes bad.
Transformer - Audio Interstage, 10 mA | Antique Electronic ...
https://www.tubesandmore.com/products/transformer-audio-interstage-10-ma
Transformer - Audio Interstage, Coil Assembly for P-T156. Product Measurements by Type. Impedance, Primary to Secondary. 10 kΩ to 90 kΩ. Item Height. 1.36 in. …
Audio & Interstage Transformers - Open Frame
https://www.surplussales.com/class/inductor/audio_openframe_transformers-Primary%20Z.html
Audio & Interstage Transformers - Open Frame Audio & Interstage Transformers for balancing or stepping signals up or down. Transformers in this category are open frame of various impedance. Surplus Sales of Nebraska carries a large variety of hard to find audio & interstage transformers to choose from.
Audio Interstage Transformers - arbeiii
https://www.arbeiii.com/Transformers/
Audio Interstage Transformers Standard Center Tapped $21.50 + S/H $22.50 + S/H Fits nicely inside Atwater Kent transformer cans We also offer transformer cores in 0.50", 0.625" and 0.75" sizes Allows you to use your original laminations and housing $33.50 each including 1st class mail shipment Please contact me with your shipping address,
Audio & Interstage Transformers - Hermetically Sealed ...
https://www.surplussales.com/class/inductor/audio_sealed_lowimp_transformers.html
Audio & Interstage Transformers for balancing or stepping signals up or down. Transformers in this category are hermetically sealed and of lower impedance than 1K ohms. Surplus Sales of Nebraska carries a large variety of hard to find audio & interstage transformers to choose from.
Transformer - Hammond, Audio Interstage, 12 Watt | Antique ...
https://www.tubesandmore.com/products/transformer-hammond-audio-interstage-12-watt
Transformer - Hammond, Audio Interstage, 12 Watt. Click to zoom in. Customer Images: No Images yet! Submit a product image below! Submit your …
Softone RC-20 Versatile Audio Interstage Transformer
http://softone.a.la9.jp/english/RC20/RC20.htm
RC-20 is an R core audio interstage transformer. The excellent magnetic properties of R core and precisely wound coil by the computerized manufacturing system achieve a wide bandwidth, low distortion, and low magnetic loss of the transformer. Outline Wide bandwidth, low distortion, low magnetic loss Primary 1+1: Secondary 1.8+1.8
Tube Driver - Interstage (124 Series)
https://files.valinonline.com/userfiles/documents/hammond-tube-audio-transformers.pdf
Tube Driver - Interstage (126 Series) TUBE DRIVER - INTERSTAGE TRANSFORMERS • Designed for driver use ONLY in single ended tube output amplifiers. These units replace coupling capacitor circuits for improved sound. • Closed style with minimum 8" long leads. • All models use bifilar wound windings for exceptional coupling and bandwidth.
FAQ on interstage and line output transformers (Lundahl)
https://www.diyparadiso.com/lundahl/faq21.htm
Unloaded interstage or direct grid drive (circuit A,B&C) What interest us : Aa what frequency 80H will = 6K F = 6000/6,3 . 80H) = 11,9 Hz ( lowest frequency ) Bb the recommended upper primary impedance = 6K , as soon as we load the secondarys this drops Why is it the recommended impedance , because at 12 Hz we have -6 dB and 6 Kohm
By-passing Defective Audio and IF Transformers
https://antiqueradios.com/chrs/journal/transformers.html
In the case of Audio Interstage Transformers, connect a capacitor from the plate of the driving tube to the driven tube grid, The value is not critical. I suggest 0.1 mfd at 400 volts. Then bypass the open winding with a resistor. Again the value is not critical. If the plate to B+ side is open, try using a 22K at 1 watt.
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