[Hallicrafters] HA-44 questions - continued - again

[Waldo Magnuson]

Hi Al,
    Thank you for responding.  It seems the forum is focused on 5U4s, 
Hallis in films, etc. and not always on helping advice.  Thanks for 
yours.
    I was able to remove the cover on the relay after looking at it from 
both sides.  The plastic cover has a couple of little bumps on each 
side which clip into the base.  I used a strip from a 3x5 card soaked 
in DeOxit and cleaned the contacts.  That seems to have fixed the relay 
problem.  The driver tuning seemed touchy so I cleaned the wipers on 
the condenser and maybe it's ok now.  There may still be a bit of 
problem in the driver circuitry.  Next I'll test it on the air, I've 
been transmitting into a Heath Cantenna.
73,  Skip  W7WGM
Spokane, WA

On Monday, May 29, 2006, at 01:39  PM, Al Parker wrote:

> Hi Skip,
>     Yes, try Mouser.com for the relay, and/or digikey.com.  I know we 
> can
> get the same relays Drake used that way.
>     And, yes, do try to remove the cover, it probably just snaps 
> on/off if
> you lift the edge to go over a tab.  I use a plain strip of white (or
> brown paper bag) paper with a drop of DeOxit on it to clean relay
> contacts.  Don't try to file them.
> 73,
> Al, W8UT
> New Bern, NC
> BoatAnchors appreciated here
> http://www.boatanchors.org
> http://www.hammarlund.info
>
> ----- Original Message -----
> From: "Waldo Magnuson" <magnuson at mac.com>
> To: <hallicrafters at mailman.qth.net>
> Cc: "Waldo Magnuson" <magnuson at mac.com>
> Sent: Sunday, May 28, 2006 11:22 PM
> Subject: [Hallicrafters] HA-44 questions - continued
>
>  It is a Potter & Brumfield 110 v DC KH-4272 relay.  I have two
>> questions:
>> 1) Does anyone know of a source for the KH-4272?
>> 2) Has anyone removed the cover and cleaned the contacts of these
>> relays.
>> Thanks.
>> 73s,  Skip  W7WGM
>>
>