HW-100 with intermittent noise on receive

[Bernie Murphy]

Howard:

If you have not already done so, clean the relay contacts.

You can pry the lids off the relays without breaking the plastic covers  (if
you patient and careful).

Cut some heavy white bond paper into thin strips and run these strips back
and forth over the relay contacts.  You should see "gunk" on the paper.
There is a whole  "religious cult" on how to clean relay contacts so I won't
go there.

Next,  tighten down all the hardware holding down the boards.  One
suggestion was to even undo the screws, lift the boards carefully and make
sure that there is a nice clean ground for the boards. Tighten everything
down snug once you are done.  Floating ground points can drive you around
the bend!

Let us know if the above suggestions help solving your problem.

73, Bernie



----- Original Message -----
From: "H. Sawyer" <gdguy21 at YAHOO.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Thursday, December 05, 2002 2:22 PM
Subject: HW-100 with intermittent noise on receive


> This problem has plagued me for many years. The noise sounds like heavy
rainfall on a window pane. Somewhat like static crashes. The noise does vary
with changing  the volume control of the AF gain.
>
> When it is there, it seems as if rapidly turning the AF gain control
clears it temporarily. I have achieved temporary relief by using a spraying
a cleaner into the AF pot.
>
> I have replaced V14, no help.
>
> The noise seems to be independent from the RF gain control.
>
> Green team, your help, please.
>
> Thanks, in advance.
>
> Howard
>
> KO6WL
>
>
>
> ---------------------------------
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now
>
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
>
> Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
> To post - HEATH at LISTSERV.TEMPE.GOV
> Archives - http://interactive.tempe.gov/archives/HEATH.html

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html