From: "Rein A. Smit" 
Subject: Re: [drakelist] R7(A)  SL500, 500 Hz filter


"Rein A. Smit"  made an utterence to
the drakelist gang
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Hi Lars,

Thanks. I should have waited with the question as I found I believe
another side with a partial R7 manual, no schematics. And there, the
auxiliary filters were listed. The ultimate rejection is around
-80/-90 dB.

Thanks again es 73

Rein W6/PA0ZN

Lars E. Pettersson wrote:
> "Lars E. Pettersson"  made an utterence
to the drakelist gang
> ----------------------------------------------------------------------
> On Tue, 2004-12-07 at 05:02, Rein A. Smit wrote:
> 
>>I am looking for the specs of a SL500 filter crystal for the R7/R7a
>>
>>How many crystals?
> 
> 
> 8 poles.
> 
> 
>>Form factor  6 dB/ 60 dB bandwidth
> 
> 
> See the TR7 manual,
> http://www.wb4hfn.com/DrakeManuals/TR7/Drake_TR7_12.jpg
> 
> 6dB 500 Hz
> 60 dB 1100 Hz
> 
> 
>>In and output impeadance
> 
> 
> 50 ohm
> 
> 
>>Ultimate rejection.
> 
> 
> Do not know...
> 
> 73 de Lars, sm6rpz
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