Re: [amsat-bb] KLM 2m-14c relay

["i8cvs" <domenico.i8cvs@xxxxxx>]

Hi Kyle, K0KN

I am using the same antenna but before to buy a new relay I suggest to
check the following:

1) Check the VSWR  when relay is powered ON for LHCP
2)      "  if the voltage across the coil is at least 12 volt DC
3)      "  if the RCA plug connector used for 12 volt DC  is rusty   
4)      "  if the coil resistance is 140 ohm 

If the above are OK you are lucky because you probably  have only
moisture between the contacts or accumulated water condensed in to
the plastic cover or the contacts are burned expecially if the relay 
has been operated "while speaking" but everyting is not lost.

To clean the contact remove the silicon all around the plastic cover 
and rise it.

Inspect and properly clean the contacts after that check if there are 
bad  soldering points between the relay terminals and the copper 
strips over the PCB.....this is very important.

Remember that is much better to clean a rusty relay like that instead
to solder a new one over an old and oxidated PCB 

At the end I suggest to double protect the relay in to an additional 
plastic box against the water and moisture like I did in both my
KLM 2M-14C and 2M-22C

In a separate email I have sent to you few pictures showing how the
relay contacts looks like after removing the plastic cover and how to
adapt to it an additional plastic box.

Have fun and 73" de

i8CVS Domenico

  
----- Original Message -----
From: "Kyle Yoksh" <yokshs@totalusa.net>
To: "amsat-bb" <amsat-bb@amsat.org>
Sent: Tuesday, April 04, 2006 3:41 PM
Subject: [amsat-bb] KLM 2m-14c relay


> Hi all,
>
> I may have a faulty relay on my KLM 2m-14c antenna. This just started
> happening within the last week or so.
>
> When powering the relay (to select LHCP), my noise level jumps from s0 to
s7.
> Rotating the beam doesn't change the
> noise level.
>
> Has anyone had this problem? Does anyone have a source for a replacement
> relay?
>
> Thanks and 73,
>
> Kyle Yoksh
> K0KN
> Olathe, Kansas
> Amsat# 35249
> ----
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