[ICOM] John G. <af5cc at fidmail.com>: Receive level dropping-rig or antenna system issues?

[John]

It does appear to be in the radio. I tried the tapping on the case
method with no luck, but when the receive level dropped on 12m, I
switched over to my 6 meter beam, since it uses a different feedline.
I keyed the rig quickly.  When I switched back to the dipole the
receive level was back.  Since it was keyed on a different feedline,
it doesn't appear to be in the antenna system.

73 John AF5CC

On Mon, Mar 25, 2013 at 2:10 PM, SK <k8ll.ham at gmail.com> wrote:
> John.
>
> When the receive level is low try tapping on the case of the radio. If it's
> a connection or relay problem in the radio it may pop right back up to
> normal. If it's repeatable each time the receive level drops then you can be
> pretty sure that there is a relay or connection problem in the radio, not an
> antenna problem.
>
> If it's in the radio, try unplugging then plugging back in any boards or
> cables/plugs or anything else that's easy to disconnect and reconnect in it.
> That can knock corrosion off of connector surfaces sometimes and
> re-establish the connection. Of course, that won't help if it's relay
> contacts.
>
> If you can get to the relay contacts directly they can be cleaned by pulling
> a piece of paper through the contacts a few times while holding the contacts
> closed.
>
> Hope this helps.
>
> 73   Stan K8LL
> ---------------------------------------------------------
> On 3/25/2013 12:00 PM, icom-request at mailman.qth.net wrote:
>>
>> Here is a message I posted a few months ago about the receive level
>> >>dropping off at times in my Icom 706 original:
>> >>
>> >>"I have noticed for the past few months that the receive seems to drop
>> >>at times on certain bands-it started on 12m and now occurs on 15m as
>> >>well. If you click the key or mic to quickly put it into transmit the
>> >>receive comes back. To me this sounds like a dirty relay or one that is
>> >>going bad"
>
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