Matt & All,
If you have any ground connections going to the body just grab a
piece of sandpaper Disconnect your Batt leads on both sides on Ford &
Dodges a battery terminal brush you will need to clean, also sugguestion get
those felt chem. treated Washers and place on the bottom, keeps corrosion
down.
on Fords the short 6 or 8 inch cable on the older V-8 engines they usually
go to the starter selonoid rust sometimes does and does not give problems,
but that 12 inch or less black wire leads I noted all manufacturers will
have corrosion of a different kind clean that area also.
Inspectr your B + and B- wires for cracking , any acceosory wires usually
are crimped, I wind up soldering them.
I had a 1976 Chevy Caprice the Neg. Black cable corrode out and a Ham freind
& I was heading to a Hamfest the #12 short wire began to smoke, we took his
car instead and later I replaced the Battery cable and that short ground
jumper.
Corrosion is resistance and that may cause some oddball static WD-40 &
Liquid Wrench are the best 2 to lossen parts up ,a and LPS in a Green Can
one of them can actually waterproof a ground.
M. H.
----- Original Message -----
From: "Matt" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, January 03, 2005 7:33 AM
Subject: Re: [Repeater-Builder] Rusty Bolt effect and noise floor questions
>
> Hi Joe and Scott,
>
> Thanks for your replies.
>
> Yes, I did the test as described in the article and like you Joe, I did
> one
> more step which was to key the transmitter and check for desense. The
> SINAD
> reading on the meter didn't change when I keyed up.
>
> Its a "proper" commercial antenna the repeater group purchased and its
> only
> been up since early November so I'm hoping its not my own antenna :-)
>
> I do like the idea of taking an AM receiver to site and having a listen
> around. I hadn't thought of that and will do this as soon as I can.
>
> I wonder if oiling the dodgy connection causing this rusty bolt effect
> would
> temporarily stop it, meaning I could identify the culprit?
>
> Best wishes all and thanks for the replies.
>
> Matt
> G4RKY
> ----- Original Message -----
> From: "Joe" <[EMAIL PROTECTED]>
> To: <[email protected]>
> Sent: Monday, January 03, 2005 8:34 AM
> Subject: Re: [Repeater-Builder] Rusty Bolt effect and noise floor
> questions
>
>
>
> It's not desense that he has, it is loss of sensitivity. If he did the
> sensitivity test as stated on the article Chris wrote, the transmitter is
> not active.
> http://www.repeater-builder.com/tech-info/effectivesens.html
> I take the test one step more and transmit during the sensitivity test to
> look for desense.
>
> 73, Joe, k1ike
>
> At 08:17 PM 1/2/2005, you wrote:
>>Desense in the neighborhood of 17 db. is a definite
>>possibility. The source of the desense can be inadequate attenuation of
>>the
>>transmitter and receiver frequencies by the appropriate sections of your
>>duplexer or, and in fact, wideband noise produced within your antenna or
>>other 'hardware" in it's vicinity due to poor connections and or corrosion
>>when excited by your transmitter.
>
> All outgoing email scanned with Norton AntiVirus2004.
>
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>
>
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