On 01/30/2009 06:12 AM, Jim Shorney wrote:
On Thu, 29 Jan 2009 22:40:29 -0500, Garey Barrell wrote:
I don't recall just how much LO is available, but I'm pretty sure a
Mini-Circuits SRA-1H or SRA-3H would work just fine in that spot. The
CM1 is long gone....
Found it. This page discusses replacing a CM-1HF with a SRA-3MH:
http://www.sm6rpz.se/radio/mod7.php
I'll see if I can find my scanned pages from the CM-1HF data sheet, and
put them on my web-page also.
Another thing to consider, not mentioned on my page mentioned above, is
the insertion loss of the mixer. The Mini-Circuits SRA-3MH has 4.77 dB
insertion loss, the Varil CM-1HF has 6.5 dB. So you gain about 1.73 dB
in MDS by choosing the SRA-3MH.
Also take a look at what Pete, KE9OA, mentioned in rec.radio.shortwave:
http://newsgroups.derkeiler.com/Archive/Rec/rec.radio.shortwave/2007-11/msg00573.html
73 de Lars, sm6rpz
--
Lars E. Pettersson <[email protected]>
http://www.sm6rpz.se/
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