[600MRG] IC735 mods...an alternative

[J Mcvey]

Got $9 in the budget?https://www.mouser.com/Passive-Components/Frequency-Control-Timing-Devices/Oscillators/_/N-7jdfi?P=1z0woad
just add 3.3 to 5V , a cap and a filter if you like...
Those Ic735 mods mostly seem to extend the PA capability downward in frequency.Not sure what shorting the transistor in receive section  was about but  those were my initial impressions.
The LPF might need some tweaking for 630M. I think going all the way down to 2200 meters is too much of stretch, though.I might try before and after tests with a spectrum analyzer to see what happens when I get time to do it.
Since the target frequency is below 160M, why would harmonics be much of an issue with the 160M LPF?Add a 630M section in series with the 160M LPF? 
 

    On Friday, January 26, 2018 7:53 AM, N1BUG <paul at n1bug.com> wrote:
 

 >> Why ruin a perfectly good radio???

If I'd had a IC-735 around that wasn't being used on HF, I probably 
would have 'ruined' it in a heartbeat. That would have been the most 
cost effective way to get on.

With a little help to keep it within budget I build a really cheap 
transmit converter. But since a good stable 10 MHz oscillator isn't 
happening here for some time, I'm using a signal generator that I 
would prefer not to leave running for so many hours. So even now, if 
I had a 735 that wasn't needed for HF I'd dig into the little 
bugger... ;-)

73,
Paul N1BUG
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