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Title: Knights Radio Broadcaster Post by: g4jqt 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. Title: Re: Knights Radio Broadcaster Post by: W1GFH on March 06, 2023, 12:17:26 PM This site is pretty helpful:
https://www.knightkit.com (https://www.knightkit.com) Specifically... https://www.knightkit.com/mysteryparts.htm (https://www.knightkit.com/mysteryparts.htm) Never had one of these but always wanted one. Title: Re: Knights Radio Broadcaster Post by: g4jqt on March 06, 2023, 12:19:51 PM Thanks for the link. One I missed.
Title: Re: Knights Radio Broadcaster Post by: Tom WA3KLR 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/ Title: Re: Knights Radio Broadcaster Post by: DMOD 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 |