MIke in the bfo circuit you could replace the
trimmer cap with and inductor and move the bfo freq to the lower side of the
"window" of the filter and rec upper side band ala? Bitx20. the first mixer
xtal could be massaged to get right on freq. I built a similar rec for lowfer
using 5.0 mhz injection and a 5.185 filter. It rec 185 khz usb. Stability wasnt
good enough for qrss 30 but it would work ok on qrss 3. I also built a tx strip
for 185 khz first mixer changed to bal mod at 5.185khz second mixer to tx
mixer.
?
N3zi's dds generator would make this rec a real
winner. Some where I have a box of backlit displays and ......
?
Paul
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----- Original Message -----
Sent: Thursday, June 17, 2010 1:34
AM
Subject: Re: [QRPLabs] beacon
receiver
?
I don't know, using 5068.8kc rocks would end up with a 2.4kc center freq
in the audio output.
Hans, what do you
think?
Mike
WE0H
Paul D wrote:
>
>
> I
found a link to n3zi's site where he has a gen coverage rx kit
>
suitable for 30m beacon op with dds or xtal control.
>
> I will
have to check microprocessor xtals for combo that will cover
> 10.140.
5.068if and 5.068 injection woiuld give 10.136 tweaking the
> xtals
slightly would bring it up to 10.140 or use spectran which will go
> up
to 5khz.
>
> comments welcome. Neat kit for $19.95.
>
> Paul k5wms
