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I have used to SRA-8 in an LF receiver and found no problems whatsoever
with signal handling. It is a standard level 7 mixer, (optimised for 7dBm
Lo drive) so will have a 3rd order output intercept around teh 17 to 20dBm
mark. From what I recall of teh SL6440 it had a comparable
performance. I had quite a few used SRA-8 devices from a surplus
source, but certainly woulkdn't dream of buying one when there are many better
mixers around much cheaper.
I did once make some measurements using an FST3125 bus switch in
a simple a double balanced mixer. At 10MHz measured an IP3
figure near to 40dBm - seriously better.
Andy G4JNT
----- Original Message -----
Sent: Friday, September 17, 2004 6:57
PM
Subject: Re: LF: SL6440 / mixers
Dear
LF Group,
I have been considering purchasing the SRA-8 for the first
mixer in
a new LF receiver I am designing. This is a passive DBM and
is
fairly expensive. Would I be better off using an
SL6440?
73
Joe
If it's strong signal performance you are looking for ( small sig + CFH)
then perhaps an H mode switching mixer would be a good choice. The IP3
and balance should be spectacular at <1000 kHz.
73
David
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