[Collins] Re: SYNTHESIZER FOR DRAKE RECEIVER BY HAGEMAN

[kiyoinc at attglobal.net]

collins-request at mailman.qth.net wrote:

> I don't believe you can switch bands like that on the 75S-1. I have
> the 75S-3 and you have to switch the band switch to change coils and
> then switch crystals within the passband of the switch setting. The
> crystal sockets are also selected by the band switch but with the
> extra sockets you can change crystals within the passband. The mod to
> add extra crystals from Collins added a second switch deck and
> another crystal board. This allowed several crystals for each switch
> position. The 75S series was not designed for SWL type service.

Yes and no.  Glen's add-on crystal switch board effectively -2's the 75S-1.

I'm not asking for continuous .3 to 30 tuning by spinning one knob.

I'm looking for a DDS to control the 1st mixer.  It might integrate with 
Glen's crystal switch.

If I get the itch to listen to a frequency, I'd have to switch the 
S-Line's bandswitch to proper letter band, switch the DDS on and tune it 
to the band segment, and switch the modified Glen crystal bank expander 
to engage the DDS.

Then I'd have peak the front end and tune the PTO.

I have the Collins crystal pack so I can do that now by lifting the lid 
and plugging the appropriate crystal.  Glen's crystal switch makes that 
easier.

A DDS would make it even easier. The DDS would replace the crystal pack 
and the act of plugging and unplugging crystals.

The AOR DDS2A is an elegant, albeit costly solution.  I think it's 
overkill because part of its magic is to replace the PTO.

I'm satisfied with the PTO's readout, stability, and feel.

I could not get the folks at SSENG to understand that I don't want a 
VFO, I want the 100+ Collins front end crystals.

de ah6gi/4