[Premium-Rx] srt CR-91

[Karl-Arne Markström]

To avoid further confusion, it should be pointed out that the SRT CR91 is a mid-80's
solid-state premium-RX of Swedish manufacture.

It is not in any way related to the RCA AR-88 derivative CR-91.

73/

Karl-Arne
SM0AOM


----- Original Message ----- 
From: "Al Klase" <al at ar88.net>
To: "Herbert Bloemen" <bloemen at wxs.nl>
Cc: <premium-rx at ml.skirrow.org>
Sent: Monday, January 29, 2007 9:35 PM
Subject: Re: [Premium-Rx] srt CR-91


> Hi Herb,
> 
> I thought I'd have a really definitive answer for you, however the 
> schematic in my CR-91 book has the "dB Meter" drawn in in pencil, and it 
> has an obvious mistake.  Anyway, it should be just like the CR-88: 
> 
>     * 100-ohm resistor from the cathode of the first IF amp (V5-pin5) to
>       the positive meter terminal.
>     * Negative meter terminal to ground.
>     * 100-ohm variable and 4700pF shunting the meter.
> 
> 
> The meter movement is backwards, i.e. needle is on the right for zero 
> current.  It shouldn't be real hard to work up a bridge circuit in order 
> to use a normal meter.
> 
> Hope this helps,
> Al
> 
> Herbert Bloemen wrote:
> > Hi,
> >
> > Anybody has a schematic showing how the S-meter/audio level meter works ?
> >
> > Regards, Herbert
> > _______________________________________________
> >
> > Visit the Website: http://kahuna.sdsu.edu/~mechtron/PremRxPage/
> >
> >
> >   
> 
> -- 
> Al Klase - N3FRQ
> Flemington, NJ
> http://www.skywaves.ar88.net/
> 
> 
> 
> _______________________________________________
> 
> Visit the Website: http://kahuna.sdsu.edu/~mechtron/PremRxPage/
> 
> 
> -- 
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> 


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