[amsat-bb] Preamps!!!

[Jamie Hutches <jmhutches@xxxxxxxxxxx>]

Speaking of preamps....
I need some help here...I need a 2M/440 preamp and I want to use it mainly
for FM, but maybe for the future would want SSB/CW capability too. 
Can anyone makes some recommendations? I am on a very tight budget too...so
I can't afford much...us college students have a tough time to get money
sometimes.

Thanks!
Jamie Hutches, KD5GOB


At 01:02 PM 10/17/1999 -0400, Mike73@aol.com wrote:
>In a message dated 10/16/99 10:25:07 PM Eastern Daylight Time, 
>rcrice@netropolis.net writes:
>
>> Can anyone offer a clueless newbie some sage advice on preamps.
>
>Hi Robert,
>
>My personnal favorites are SSB. The 2000 and 7000 series. While not cheap, 
>they are excellent in design and operation. I saw the URL for SSB listed
in a 
>previous note so I won't repeat it.
>
>One of the best things you can do if you operate any mast mount preamp is to 
>sequence it. Don't rely on the VOX or RF sensing circuit in it to switch
from 
>receive to transmit. This is especially important when you start to use amps 
>(hard key your amps as well) with your rig. The idea is to have all 
>mechanical relays switch and settle before you apply RF. If you don't do
this 
>you risk "hot switching" and eventually this will take its toll on the RF 
>relays in the preamp.
>
>I saw the note on SSB's not VOX switching correctly. At one time there was
an 
>issue with a small coupling capacitor in the RF detection circuit that could 
>open under certain circumstances. To the best of my knowledge, this has been 
>resolved.
>
>73,
>Mike, N1JEZ
>AMSAT #29649
>AMSAT Local Area Coordinator
>"A closed mouth gathers no feet."
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>
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Internet:  		        Jamie Hutches
jmhutches@harding.edu        Harding University
				HU Box 10247
Ham Radio: KD5GOB	    Searcy, AR 72149-0001
  				 501-279-5823
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