Re: [IRCA] SP 600 /R390

["Bob Young" <youngbob53@xxxxxxx>]

Yes I love crystal filters, 388's have them but the noise limiter is not as 
good as on a 390 or 390A, the best of both worlds would be a phasing control 
on a 390A as the narrow positions are crystals (I think), the mechanical 
filter's narrowest postion is 2KHz, the 1 and 0.1 are crystals. It does very 
well with hets though except when the stations are 1 KHz apart like when 
WWKB 1520 (which booms in around here) and 1521 Saudi Arabia (which also 
booms in around here) are both in. I really miss phasing in that situation, 
and love the 600 and the 388. Actually the HRO's are pretty good with splits 
also and have great crystal filters,

Bob Young
Millbury, MA


>From: mwdxer@xxxxxxxxx (Patrick Martin)
>Reply-To: Mailing list for the International Radio Club of 
>America<irca@xxxxxxxxxxxxxxxx>
>To: irca@xxxxxxxxxxxxxxxx (Mailing list for the International Radio Club 
>ofAmerica)
>Subject: Re: [IRCA] SP 600 /R390
>Date: Sun, 6 May 2007 10:02:37 -0700
>
>Bob,
>
>I never knew that. Then the R-390 does have an honest Noise Blanker and
>not a Noise Limiter as the SP 600 had. Now that is interesting. I wonder
>what kind of circuit the R 390 uses? Anyone know? That diode set up in
>the SP-600 never did anything much except distort the audio as you
>mentioned. That was the only reason I sold the SP 600. It was one great
>receiver and netted me a lot of great DX through the years. One thing I
>really miss is the crystal phasing. I wish the crystal filters in the
>SPR4 had phasing.
>
>73,
>
>Patrick
>
>Patrick Martin
>KAVT Reception Manager
>
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