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Author Topic: Knights Radio Broadcaster  (Read 1305 times)
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g4jqt
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« on: March 06, 2023, 04:34:05 AM »

Does anyone have the details of the impedance matching for T1 and the turns ratio/inductances of L1 in the Knights Radio Broadcaster? There seem to be various versions of this design produced by Knights (all appear to be potential death traps!) and I wonder if anyone has the specifications of these components.

I'd like to think that the design gave excellent results and was based designed by the best in the business, despite the obvious cost restrictions, and I would like to make a copy, although a mains isolating transformer for our 240VAC would be necessary.

I did have a search in the forum but didn't find any reference to it.

Thanks.
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W1GFH
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« Reply #1 on: March 06, 2023, 12:17:26 PM »

This site is pretty helpful:

https://www.knightkit.com

Specifically...

https://www.knightkit.com/mysteryparts.htm

Never had one of these but always wanted one.
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g4jqt
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« Reply #2 on: March 06, 2023, 12:19:51 PM »

Thanks for the link. One I missed.
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Tom WA3KLR
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« Reply #3 on: March 06, 2023, 06:28:06 PM »

A ham friend of mine had one as a kid, re-acquired one, restored it, I'm not sure if he ever posted the story here before.

Here is his webpage on the Broadcaster, includes links to other Broadcaster sites with information:

https://wa3dsp.org/KnightBroadcaster/
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AC0OB - A Place where Thermionic Emitters Rule!
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« Reply #4 on: March 15, 2023, 12:19:25 AM »

Does anyone have the details of the impedance matching for T1 and the turns ratio/inductances of L1 in the Knights Radio Broadcaster? There seem to be various versions of this design produced by Knights (all appear to be potential death traps!) and I wonder if anyone has the specifications of these components.

I'd like to think that the design gave excellent results and was based designed by the best in the business, despite the obvious cost restrictions, and I would like to make a copy, although a mains isolating transformer for our 240VAC would be necessary.

I did have a search in the forum but didn't find any reference to it.

Thanks.

In the Transmitter section

http://amfone.net/Amforum/index.php?topic=42107.0

There is a set of schematics and explanation on homebrewing your own HIFI broadcast transmitter with references to the Knight and another transmitter.

Phil - AC0OB
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