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Homebrew Isolation Transformer
http://radiorestorer.com/isotrans.html
Homebrew Isolation Transformer My isolation transformer is made of two matching, and very large transformers ( 600v to 12/240 v). My unit is rated for 2.0 KVA, which is well enough for general radio repair.
Homebrew Isolation Transformer - Antique Radios
https://www.antiqueradios.com/forums/viewtopic.php?t=295857
Antique Radio Forums Index » Category » Homebrew Radios and Equipment. All times are UTC [ DST] Homebrew Isolation Transformer : Page 1 of 2 [ 37 posts ] Go to page 1, 2 Next Previous topic | Next topic : Author Message; Macrohenry Post subject: Homebrew Isolation Transformer ...
Antique Radio Forums • View topic - homebrew isolation ...
https://antiqueradios.com/forums/viewtopic.php?t=242252
The 50 Watt Triad N-68X 115V/230V to 115V isolation transformer is $11.20 (economy shipping $4.99) from Mouser so it's not only more power at the correct voltage but costs less than a back to back pair of $11.99 RS 12.6V 3A transformers. The shipping over head is less if you already need other parts.
Audio Isolation Transformer - QRZ Forums
https://forums.qrz.com/index.php?threads/audio-isolation-transformer.323807/
It consists of a home brew interface that filters the audio and converts it to On/Off keying. The computer is a old IBM Sub Note running Window 3.1 and a software program written in C (Runs in the DOS mode). K7MEM, Dec 8, 2011 #2 W8JI Ham Member QRZ Page
Amazon.com: Audio Isolation Transformer
https://www.amazon.com/Audio-Isolation-Transformer/s?k=Audio+Isolation+Transformer&page=2
Roadiress Audio Transformers, 10pcs/Pack 600 : 600 Ohm 1:1 EI14 Isolation Transformer Audio Transformers. 5.0 out of 5 stars 1. $3.70 $ 3. 70. Get it Fri, Mar 18 - Wed, Apr 13. FREE Shipping. Tripp Lite IS250 Isolation Transformer 250W Surge …
Audio Isolation Transformer 1 - YouTube
https://www.youtube.com/watch?v=L9j3YO6QFg0
Blocks DC but allows audio signals to pass.http://www.sciencewriter.net
Isolation Transformer - Page 1 - EEVblog
https://www.eevblog.com/forum/beginners/isolation-transformer-82690/
In the past, I used to use such transformers for my audio pre-amps and dac units as they offered superior isolation without the cost of special grade transformers. Another trick if you cant find a 120v-120v transformer, I at times would use a 120v-48v and then a second using it backwards to get back to 120v, or even a 120-240v, then another one ...
Homebrew transmitter done! And it works! - Amfone
http://amfone.net/Amforum/index.php?topic=45228.0
The audio input isolation transformer and balanced audio chain is AM broadcast engineering practice, and that's the way uh huh uh huh I like it. Maybe you recognize KC and the Sunshine Band sneaked in there. (;->) That's a cool marriage of old and new, all it needs is something blue.
Sound Card Interface - KA1MDA
http://ka1mda.org/ham/homebrew/sound/index.htm
Although the 600 ohm impedance was not an optimal match to the radio's RX audio line, the transformers, along with the opto-isolated keying line, offered full isolation between both pieces of equipment. TX audio level matching still required the use of a resistive pad.
Groundloop information pages - Audio
https://www.epanorama.net/documents/groundloop/antenna_isolator_building.html
The easiest way to build the isolator is to use two chassis-mount antenna cable connectors (typically EIC antenna connectors on Europe and F-connectors on USA). Connect the center pins with one 10 nF capacitor and use the connectors' mounting nuts to connect a second 10 nF capacitor between the bodies, making sure that the connectors don't touch.
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