Shortwave frequency for pantry TX - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Restoration73 · 12th Feb 2020, 9:48 pm

If SW is used, it might be better to use crystal oscillator to prevent drift. There are so called parts of the spectrum designated ISM that have various uses but are not protected e.g. 13.56 MHz just below the 22m broadcast band.
The technique often used for MW is the leaky feeder system, where the transmitter is connected to a run of coax which is not terminated with a e.g. 50 ohm load. The range is limited to receivers in vicinity of the coax.

12th Feb 2020, 9:48 pm	#21
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,801	Re: Shortwave frequency for pantry TX If SW is used, it might be better to use crystal oscillator to prevent drift. There are so called parts of the spectrum designated ISM that have various uses but are not protected e.g. 13.56 MHz just below the 22m broadcast band. The technique often used for MW is the leaky feeder system, where the transmitter is connected to a run of coax which is not terminated with a e.g. 50 ohm load. The range is limited to receivers in vicinity of the coax.