[Elecraft] Elecraft Receiver

[Larry Phipps]

I would love to see an actual K-RCV with low distortion synchronous AM 
detector.

In the meantime, here's a concept I have been toying with building. The 
R-388, like most Collins gear, uses front-end converters to shift a 
whole band segment so that the rest of the receiver becomes a tuneable 
IF. This brings back some of the problems associated with multiple 
conversion receivers that the K2 beats the pants off of... but full K2 
performance isn't as necessary in non-contest general coverage conditions.

I'm thinking of a strong passive mixer preceded by selectable filters, 
and followed by a 500 kHz wide bandpass filter. Collins used 200 kHz 
segments on the S-Line, but for simplicity I think 500 kHz would have to 
suffice. The LO would be adjustable in 500 kHz steps, with a LED display 
to show the 3 most significant digits of received freq, ie.13.0, 13.5, 
etc. LO output could be 7.5-37 MHz to cover .5 - 30 MHz, making the 
converter output 7.000 mHz. You would have to ignore the first couple 
digits on the rig's readout. You could feed the converter output to the 
2nd antenna input on the K2. The preamp in the K2 would need to be used 
to overcome losses in the front end.

Not the best solution, but a workable one for those who do occasional 
listening outside the ham bands.

Larry N8LP


Phil LaMarche wrote:

>Even though I have a Collins R-388 that I use on AM, I would also purchase a
>receiver immediately.  
>
>Phil  K2 & KX-1
>
>Philip LaMarche
>LaMarche Enterprises, Inc.
>www.instantgourmetspices.com 
>727-944-3226
>(800) 395-7795 pin 02
>Cell 727-510-5038
>FAX- 727-937-8834
>N.A.S.F.T # 30210
>W9DVM
> 
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