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Re: Regarding preamps



I didn't say the Icom preams were VOX switched, the Landwehr preamps which 
is what I was responding to are VOX switched.  I bought the Icom.  Didn't 
you read the post?



At 08:14 AM 2/24/2004 -0500, you wrote:
>Icom preamps are *not* VOX switched.  See a previous post of mine about 
>how I burned out an AG-25 when I changed over to a TS-2000+SSB Electronics 
>sequencer but didn't set the TS-2000 menus correctly.
>
>The Icom preamps are designed to work with Icom radios which put the 
>supply voltage on the coax line and drop it when the radios 
>transmit.  It's basically an internal sequencer.  Contrast this to the 
>preamps sold by SSB Electronics (SP-2000 & SP-7000) that *do* RF sense and 
>to which power can be supplied continuously.
>
>Bottom line: if you are using an Icom preamp with a non-Icom radio be 
>*certain* that the voltage on the coax is being dropped before the radio 
>transmits.  Believe me, I learned it the hard way.
>
>Dave Reinhart
>wa6ilt@amsat.org
>
>Emily wrote:
>
>I looked at these last year as well and there were two things that I 
>weighed against them. The first was that they are VOX switched which 
>seemed less desirable than PTT switched. Second was that the 70cm NF is 
>1.1db, which was higher than the < 1db of the AG-35.
>
>
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---------------------------------
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