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RE: Converter gain and noise..



For one year now, I've been using 25 m of a common 75 ohms TV coax cable
between the Drake 2880 and an ICOM IC-821H (I choosed the cheapest one in a
local supermarket, assuming it was the worst) .
Isn't it the cheapest  and  the most efficient solution :o))

Cheers

Jean-Louis F6AGR

> -----Message d'origine-----
> De: Jens H. Jensen [mailto:topcat@hardware.dk]
> Date: vendredi 27 avril 2001 00:18
> À: amsat-bb@AMSAT.Org
> Objet: Re: [amsat-bb] Converter gain and noise..
> 
> 
> At 14:06 26-04-2001, you wrote:
> 
> >Hi Jens,
> >
> >I run an attenuator between my Drake and FT-290R MKII IF. I 
> insert 10 dB.
> >This gets the S meter near 0. When I first installed my 
> Drake, I ran the 2m
> >IF down the tower in a spare run of 1/2" hardline. I had way 
> too much gain!
> >So I now run the IF in RG-58 to get a little bit of 
> attenuation. I should
> >mention that my FT-290 has been modified with a muTek board. 
> This could be a
> >partial reason I have to run the attenuation I do . The 
> muTek board really
> >makes the 290 hear well.
> 
> Ok, Mike, sounds like the right thing to do. RG58 is a 
> "natural" attenuator 
> in that frequency range and cheap too, making the high an 
> advantage, rather 
> than inserting an extra attenuator that might make noise or introduce 
> impedance mismatch.
> 
> 73 de OZ1LRG
> 
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