Re: [amsat-bb] Pre amp use with Arrow antenna...

[Scott Townley <nx7u@xxxxxxxx>]

Seems to me that if your arrow has the built-in duplexer, and you put the 
UHF preamp right at the antenna feed point, you don't need an RF-switched 
preamp, because the TX RF is routed elsewhere.  Not to mention that if the 
preamp ever switches you're back to simplex operation.
Or have I missed something?


At 21:23 2005-04-25, NCC-1701E wrote:
>John:
>I hope the pre amp you are thinking of using is RF switched, and your 
>Arrow has the duplexer inside the handle, otherwise you will have problems.
>
>If the pre amp does have RF switching, then you should be fine, and I 
>would try to attach it at the feedpoint of the UHF antenna, along the boom 
>to help eliminate pattern distortion of both the VHF uplink and UHF 
>downlink signals.
>
>ARR makes a great amp, and I've used them from 2M all the way to 860 Mhz 
>on trunking systems.
>
>Good luck getting more bang for your buck with the Arrow, I just assembled 
>my first one sunday, and had a blast with it on the sunday evening pass.
>I realized quite fast, that I had to rotate the antenna constantly while 
>talking, recording and writing calls down(thanks to the patience of W0SAT, 
>VE4WMK).
>
>The Arrow works great 'barefoot', but I think I will follow your steps and 
>try an RF switched amp inline as well for the D/L, but I will probably 
>have to attenuate the output level some as the antenna gain and amp gain 
>may cause image products to be generated and possible distortion of the 
>signal as well.......I'll see what happens.
>
>Good luck!
>I hope to work you on AO-51 soon!
>73!
>Ernest A. Erickson, ka9uce, EN55
>
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