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eHam Forums => SWL (Shortwave Listening) => Topic started by: N5PVL on April 05, 2016, 06:19:43 AM



Title: 30m USB Rx on the Cheap
Post by: N5PVL on April 05, 2016, 06:19:43 AM
Hello,

I am looking for an inexpensive HF receiver that will receive USB digital signals on 30m, specifically around 10.138 10.144 USB. Several units are required, so I'm looking for something easy to obtain at the lowest cost possible.

A kit may work if it is easy enough to build, but an assembled and ready to go unit is preferred.

Many of the radios that I have looked at only Rx around 10.100 Mhz, intended for AM or CW reception, I suppose.

I'm looking for the cheapest readily available receiver that will do the job. Any suggestions would be greatly appreciated.

73 DE Charles, N5PVL


Title: RE: 30m USB Rx on the Cheap
Post by: RENTON481 on April 06, 2016, 06:51:08 PM
I would think any digital SW portable with SSB and general coverage from 2.3 to 29 Mhz would do the trick.

Every Sangean SSB portable I have from the 1990's (ATS909, ATS818, ATS505, etc.) will tune SSB on 30 Meters.

Some of the Tecsuns probably tune that range of frequencies also, also in SSB. AT reasonable prices.


Title: RE: 30m USB Rx on the Cheap
Post by: KB9BVN on June 28, 2016, 11:09:47 AM
Can you use RTL-SDR dongles?  They be cheap... but you need a computer.


Title: RE: 30m USB Rx on the Cheap
Post by: VK3YE on September 03, 2016, 01:38:57 AM
That is an easy frequency to build direct conversion receivers for because crystals for 10.140 MHz are readily available from ESS http://www.expandedspectrumsystems.com/prod4.html

The very simplest approach is a direct conversion receiver that offers no sideband suppression.

I had success a few years back with this method

https://www.youtube.com/watch?v=2aUHNRgV7kw

https://www.youtube.com/watch?v=9gY9U99yl7U

My source was W3PM's website http://www.knology.net/~gmarcus/  (though I didn't bother with the opposite sideband filtering)

Another approach is direct conversion but with the phasing method to null out the opposite side.