[R-390] R-725, the new Holy Grail

Sun, 7 Dec 2003 17:15:57 -0500

Hi Federico,
mechanical filters are not always an advantage.

Hams usually go gaa-gaa after them because they have steep skirts which are
excellent for attenuating close-by interference, an important consideration
in the crowded ham bands. However, they also give AM signals (especially
broadcast) a slight raspiness to the upper audio frequencies, so folks who
prefer fidelity over filtering will prefer the older R-390 with LC type
filters. Of course, hardcore radio nuts will usually want one of each kind
of radio/filtering to suite particular circumstances or mood. :^)

None of the 390x series of receivers was ever designed for hamming or
broadcast listening, they were built to fight in the Cold War, so none of
them are actually being used for their original purposes by us hobby people.

What makes the R-725 interesting is that it's an oddball, half 390 and half
390A, and there were relatively few built, both factors which make them
interesting therefore collectable and costly. At least you can listen to all
of  HF with an R-725; with an R-389 you're limited to the broadcast band and
below.

I sure would like one, but not at that price, maybe I'll get lucky sometime
at a flea market.

John

----- Original Message ----- 
From: "Dottor Federico BALDI" <[email protected]>
To: "Tom M." <[email protected]>; <[email protected]>
Sent: Sunday, December 07, 2003 3:49 PM
Subject: R: [R-390] R-725, the new Holy Grail

> Hi Tom and the Group,
>                      I'm quite surprised because as far as I know
R-725/URR
> don't have the advantage of mechanical filters of R-3909A/URR and don't
have
> the advantages of R-390/URR; the lone advantage of R-725/URR is when you
> employ it in radio direction finding and I don't think that the buyer
really
> shall employ the R-725/URR in this type of service.
>
> If somebody pays 1600 USD for an R-725/URR what shall be the value of an
> R-389/URR or a G133F?
>
> Excuse me for my english that isn't so good as I should like.
>
> 73 de Federico IZ1FID
>
> Visit my webspace voted to military surplus radio and aircraft clocks :
>
> www.dottorbaldi.it/militaryradio
>
> See also :
>
> http://www.geocities.com/pa0jta2/hamshacks.html
>
> -----Messaggio originale-----
> Da: [email protected] [mailto:[email protected]]Per
> conto di Tom M.
> Inviato: domenica 7 dicembre 2003 20.44
> A: [email protected]
> Oggetto: [R-390] R-725, the new Holy Grail
>
>
> See results from you know where.
>
>
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3062352336&category=4673
>