[600MRG] 735 mods

[Edward R Cole]

I use the free schematic sw from ExpressPCB.
www.expresspcb.com


I have made a few boards with them, too
http://www.kl7uw.com/control_box.htm

73, Ed

At 10:49 AM 1/26/2018, N1BUG wrote:
>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)Â  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
>
>
>
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73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com