[Lowfer] LF Receivers

Sun, 28 Apr 2002 15:05:54 +0000

GM - just saw your posting. Noticed you mentioned using a selective VTVM 
also.
That is the route I am thinking of. I have a Sierra 122 (I think, from 
memory) and
the manual that seems in good condx (got it at a hamfest). Only problem is 
that
according to manual, the sensitivity is around 250uv and this more or less 
puts it
in the category of "brain dead"
   Now thinking along the lines that need something like a preamp to get the 
lower
levels up to where the Sierra can hear it. Wonder if you've been up against 
this
and how you solved it. If a preamp is the answer, where did you get it 
(type,
model, how well it worked, etc) or if built, where you got the plans. Would 
like
to use some kind of broadbanded one so not having to tune but that is 
flexible.
Tks for your time and advise.
73 Walt (N4GL)

>From: "Peter Barick" <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: [Lowfer] LF Receivers
>Date: Sat, 27 Apr 2002 13:17:27 -0500
>
>[Topic was "Thanks"]
>Hi again, Steve,
>
>The topic of receivers for LF comes up on this list from time to time.
>There has been recent testimonials for the ICOM R75 being a good choice.
>I think it was reviewed in QST, Dec., 1999. Several lowfers on the east
>coast are using it with high comments about its stability for use with
>the popular software for weak sig work. I'll attach a list post by one
>user, John Andrews. Also, there is info available on setting its
>frequency accurately.
>
>I use another type of receiver, an older Drake R8. I also have a
>"selective level volt meter" type receiver, but not currently using it.
>These are usually bought on the surplus market and some need adapting
>for general use; some don't. Several on this list use SLVs for a
>receiver.
>
>Peter
>----------------------------------------
> >>> [email protected] 04/27/02 09:24AM >>>
>Good morning,
>...
>Is there a particular receiver to look for and to interface
>with the software that is available?  Thanks again.
>
>72
>Steve N4TKP
>----------------------------------------
>[Attached message from archives directed to John Andrews on the R75:]
>John,
>
> > I need a new receiver that will operate on 12VDC. I was looking at
>the
>ICOM R75 as a viable option and there are some really good deals on
>this
>particular radio at this time. My question is...has anyone tried this
>radio
>on LF without the use of an up-converter and if so, how does it
>perform? Any
>comments would be appreciated.
>
>[John's reply:]
>I bought one last summer, and am in love with it. The LF performance
>is
>excellent, and obviously wasn't an afterthought for the designers. My
>nice
>home-brew up-converter is gathering dust!
>
>The noise blanker has been quite effective, though certainly not a
>solution
>to all types of noise. I did buy the 500 Hz 455 kHz filter, and that
>has
>been a big help. The DSP option came "free" in their sales promotion,
>but it
>doesn't do much of interest for what I'm doing in LF work right now.
>It
>would be useful for HF SSB operation, however.
>
>Given the price and performance, I certainly recommend it.
>
>John Andrews, W1TAG
>
>
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