[DSP-10] EZ Lite CPU Replacement

[dsp-10@mailman.qth.net]

Good Evening To the Group,

Thanks to the info from the users manual that Paul, HB9OMQ sent to me and to 
the advice and encouragement I received from Dave, WB9OWN, I was able to 
diagnose and replace the failed CPU in my original EZ Lite unit.

I have about half the parts necessary to build another unit.  The LMX1501AM 
is no longer available from Digi Key.  Is there sub for this part or another 
source perhaps?

Since 432 is included in the software as a possible transverter is anyone 
using (planning to use) a DSP-10 for that purpose?  If so, what frequency  
conversion scheme is anticipated (or used)?  It seems to me that the obvious 
harmonically related 144/288/432  scheme would be a no-no.

One more question if I may?  I have used the 90 mhz oscillator circuit from 
the no tune transverter designs for several units and I have always bought my 
crystals from Down East Microwave since they use the same oscillator circuit 
in their transverters.  I went to the DEM website last week looking for a 
93.6667 mhz crystal for an AO-40 L Band transmit converter and was surprised 
to find that DEM has apparently replaced all their 90 mhz crystals with 180 
mhz units.  Has there been a circuit for these crystals published anywhere?  
I would guess that the basic circuit is the same but with some changed values 
for components in the oscillator circuit.

Thanks for all the help.

73 de Jess - W4MVB


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