[600MRG] 735 mods

[Dick Bingham]

Ah, it has been years since I read about the escapades of "Need new thread for this one, Hon Ed. sez my sidekick, Hashtafisti Scratchie!!! Today, the PC-Police would be all-over that column.

For those reading this thread about RX/TX on 630-meters, receiving and virtual direct read-out of frequency is easily accomplished by tuning a tranceiver to 30-meters and using a doubly balanced mixer (DBM) and an external 10MHz LO . 

Connect a suitable antenna-wire directly to the DBM input port, a 10MHz source to the LO port and the DBM IF-port  to the antenna port of the xceiver. Tune the tranceiver to 10.4xxMHz (ignore the leading "10" and look only at the digits following the decimal-point to read the 630-meter frequency)  and you are listening to 630 meters. Potential for lots of birdies without an input tuner but you will have a decent receiver for the new band.

TX on 630m is similarly easy if your tranceiver has low power transverter ports. Appropriate BPF's and an amplifier puts you on 630m. City-lot antenna installations will be your main challenge on 630m.

Get busy and join the fun!

73 Dick/w7wkr and wd2xsh-26



> On Jan 26, 2018, at 8:12 AM, Dave Riley <dave.riley3 at verizon.net> wrote:
> 
> Need new thread for this one, Hon Ed. sez my sidekick, Hashtafisti Scratchie!!!
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