Topband: Preamp for 160
w2pm at aol.com
w2pm at aol.com
Tue May 20 12:32:16 EDT 2008
>I finally got a preamp for 160. It is a AMECO PLF-2 (20db).
The only problem I see is that it has RCA jacks in the back for the
feedline and the line to the input of my FT-1000MP MKV.
Will these connector types cause allot of loss to the incoming signal
or do I
just solder on the coax as though they were pl-259's
73 fer nw es gud DX,
QSL VIA: LotW, BUR, e-QSL
Loss isn't an issue but the quality of the shield contact for outdoor
use of an RCA connector can introduce noise and defeat the purpose of
your receive antenna. Unless very well wrapped and better yet - coated
with silicone seal and/or liquid rubber - I have found the shield
connection can deteriorate outdoors from oxidation and mess me
signifcantly or intermittently. I use RG174 on Flag and Pennant
downleads as the tiny coax is very light and flexible and that size
coax is better served with small connectors like RCA's but BNC's would
be better - but more difficult to assemble and not worth the effort.
SMA's would be most ideal but they too are not as readily available and
adapter issues become more difficult. I use an RCA male at the end of
the antenna downlead then a RCA fem to SO239 adapter for the main coax
line into the shack. I completely dip the RCA male connector in silcone
seal or rubber then when plugged into the adapter tape the junction
very carefully and try to leave it in a situation where water and snow
won't collect. I would think even cheapie RCA connectors are fine for
160 - especially for inside the shack. They are simple to use and not
complex in design.
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