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Topics - digitalmod

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76
The RF Workbench / AM stereo Generator designs plus 300 watt Digital RF
« on: December 08, 2017, 1906 UTC »
 8)

Seems like we need more Captain Jolly engineers from broadcasting. I am one, albeit a kid reborn at age 70! Question: Seems to me we need some kits for shortwave DDS and not less than 250 watt transmitters. Yes, we need engineers that design and build.
I was thinking I own several stereo analog generators. I have designed switching type generator with 38 kHz L-R and 19 kHz pilots, but that's FM! Yeah and we piroots want shortwave .. so I would ask for any chips out there for a roll it easy AM stereo generator.
The station I was engineer for went AM stereo, but gave it up because public rather did not want that with 5 kHz fidelity. However two sidebands allow some nice potentials for Stereo Shortwave. Beyond that the DRM mode is easy as its just software. But, DRM has NOT really caught on either.
 ;)

77
North American Shortwave Pirate / Clever Name Radio 6940 2111 UTC 5 Dec 2017
« on: December 05, 2017, 2120 UTC »
 8)  Very strong usb signal, rap music that suddenly stopped abruptly at 2115. Maybe a test of some regular users?
Located South Carolina in up state near NC line.

78
Other / AM Country and Ragtime 6850 2022UTC
« on: December 05, 2017, 2049 UTC »
 :D

Almost in noise, but great audio quality! AM Unidentified at 2022UTC 6850 kHz,
 playing country, ragtime music from 1920"s.
Signal steady, but weak some Spanish interference. Broadcast grade Audio !

79
The RF Workbench / Any DDS 200 watt AM Transmitters or kits
« on: November 27, 2017, 1348 UTC »
 I am a retire engineer and yes very frustrated with the CB-Ham old man crap so now what's next? Most AM stations are exclusively using FET class E transmitters these days. I find very few designs for such as a Pirate high quality transmitter. In fact, so far I have located only FETS and DDS chips which after all, without a lab and shop equipped system including a scope, rather make making my own rubbish at this time. But perhaps somebody has designed a pirate class E AM transmitter. They are very high quality with wonderful baseband audio potential. Just, look as I have, they are no where, as scare as hen's teeth.

Jay

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