Re: Elecraft Receiver

Posted by N8LP on Jan 30, 2005; 11:41pm
URL: http://elecraft.85.s1.nabble.com/Elecraft-Receiver-tp374150p374151.html


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
>[phone] pin 02
>Cell 727-510-5038
>FAX- 727-937-8834
>N.A.S.F.T # 30210
>W9DVM
>
>
>
>
>
>  
>

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