[600MRG] 630 meter Kits, and Transverters

[dick.bingham]

Greetings All !

What has worked well for me is to use a 10MHz local oscillator signal to feed a doubly-balanced mixer (DBM) plus a transceiver capable of tuning from 10.000MHz to 30MHz (or higher) to listen to MF signals

I connect an antenna to the RF-Port, the LO to the LO-Port and IF-Port to the receiver input and copy DC-to-1.000MHz directly on the tranceiver as 10.000 to 11MHz. Just subtract 10MHz from the tranceiver readout to know what base frequency you are hearing.

All of this works OK for me on receive without filters between the antenna and the mixer mainly due to no strong local signal sources within ten's-of-miles. A BPF for your frequencies of interest probably will be needed. 

This same scheme will work well for transmitting. A few milliwatts of TX RF from your tranceiver (with 10dBm of LO), some BPF's to keep things "clean" plus an amplifier chain to achieve the output power level you desire, and you are on-the-air.

That is about as close to a "kit" on 630-meters as you can get these days. . .

73 Dick/w7wkr CN98pi



--------------------------------------------------------------------------------------------- 



> On Apr 12, 2016, at 7:16 PM, J Mcvey <ac2eu at yahoo.com> wrote:
> 
> Heathkit rebounding? Their site looks like a half baked yard sale of unsaleable 70's leftovers at crazy prices.  Don't hold your breath waiting for something worth having from them!If you don't like the dongle SDR radios, I'm sure there is an article about MF converters from QST or an offering on some Ham's website if you google it.There isn't much to it. Basically a converter/mixer stage designed to heterodyne 479 KHZ to maybe 1.8 MHZ just like they do in the superhetrodyne receivers.
> A google search yielded this:http://www.amrad.org/wp-content/uploads/2015/09/AMRAD_Low_Frequency_Upconverter-1.pdf
> A bit overdone, IMO, but you get the idea...
> 
> 
> 
> 
>    On Tuesday, April 12, 2016 9:45 PM, Alan Cooper <w7aln at netzero.net> wrote:
> 
> 
> Hello..!
> 
> 
> 
> On the topic of a lack of gear for MF I put a bunch of idea's in the slowly
> rebounding Heath Kit company
> 
> Of offering such a thing on the basis that it would put them in the middle
> of a historic event of Ham
> 
> Radio's return to the Place in the spectrum where it all started. They have
> not replied but I did not
> 
> Really think they would respond with much. But perhaps if more of us put
> this suggestion in their ear?
> 
> 
> 
> Alan Cooper
> 
> w7aln at netzero.com
> 
> Bandon, Oregon
> 
> 
> 
> Morse Code Forever! the original digital that started it all
> 
>                                           AKA CW (circa 1880's)
> 
> 
> 
> 
> ____________________________________________________________
> Affordable Wireless Plans
> Set up is easy. Get online in minutes.
> Starting at only $9.95 per month! 
> www.netzero.net?refcd=nzmem0216
> _______________________________________________
> 600MRG mailing list
> 600MRG at w7ekb.com
> http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com
> 
> 
> 
> _______________________________________________
> 600MRG mailing list
> 600MRG at w7ekb.com
> http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com