[600MRG] 735 mods

[N1BUG]

I decided I don't need linear modes and wanted more RF output so I 
took it a step further. Sorry about the rough hand drawn schematic. 
I'm too busy building to be bothered fighting with software to draw 
it nice. ;-)

I have a similar converter for 2200m which uses the same mixer to 
keep cost down.

Paul

On 01/26/2018 02:37 PM, Kenneth G. Gordon wrote:
> On 26 Jan 2018 at 9:47, Edward R Cole wrote:
> 
>>
>> Like this?
> 
> SNAZZY! :-)
> 
> Ken W7EKB
> 
>>
>> At 08:19 AM 1/26/2018, Dick Bingham wrote:
>>      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
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 630m-xmt-conv-schem-600px.jpg
Type: image/jpeg
Size: 82459 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/600mrg/attachments/20180126/860cc94c/attachment-0001.jpg>