[Hallicrafters] Hallicrafters Digest, Vol 82, Issue 25

Tue Nov 23 16:29:08 EST 2010

And a very special 'THANKS' to Jim for all of the tidbits of wisdom that he 
has shared with subscribers and assistance fixing Hallicrafters issues. You 
are a beacon in the dark Jim when all of the filaments no longer go glow! 
Keep up your fantastic work my friend.

Duane Fischer, W8DBF

----- Original Message ----- 
From: "James Liles" <james.liles at comcast.net>
To: <hallicrafters at mailman.qth.net>
Sent: Tuesday, November 23, 2010 1:34 PM
Subject: Re: [Hallicrafters] Hallicrafters Digest, Vol 82, Issue 25

> Good morning Richy:
> The function switch is very seldom the problem.  The switch is mounted on 
> a
> plate that is riveted to the chassis and has become loose and oxidized. 
> The
> early radios used screws.  I would stop any repair work now and do the
> following before you replace the function switch.
>
> Drill one of the rivets out that hold the function switch plate and 
> install
> a screw and star washer using Penetrox copper particulate compound (Copper
> butter --- like that used on the aluminum elements of an antenna) --- the
> zink compound is OK but I prefer copper.  Then do this ---- you are going 
> to
> hate me for this one but the payback is immense.  Remove every screw in 
> that
> radio and reset with a dab of Penetrox.  A handy device to administer the
> Penetrox is an 18 gage surgical syringe.  You say I can't afford that
> device ---- wrong, they cost $.26 at your local pharmacy and while your
> there buy a 28 gage version for Deoxit administration.  Now place a drop 
> of
> Deoxit on every star washer that lives under a rivet and use a small 
> hammer
> and narrow screwdriver to tap the star washer as you would try to turn a
> wheel to reset it.  VOILA you have just fixed %95 of the problems that 
> will
> occur with the SR-2000, SR-400, and SR-400A etc.
>
> Any radio that uses an aluminum chassis will have the same problems.  You
> can tell whether a radio has been stored in the garage where temperatures
> vary wildly or in the closet.  The garage kept radios always seem 
> impossible
> to make work properly or are forever squirrely.  The SR-2000 is probably 
> the
> most affected of all because it absolutely demands chassis continuity
> without unexpected chassis loops.  This is because of it's inherent power
> and collocation of components.  The above procedure is a permanent fix.
>
> One of the most common complaints with the SR-2000 is "I can't neutralize
> that radio and if I could, it would be goofy tomorrow"  Again, the above
> procedure is a permanent fix.
>
> BTW, L15 and L16 are best adjusted with a sweeper.  Don't understand the
> comment regarding the effect on the audio --- they have to be way off to
> affect audio quality.
>
> Good luck and don't give up on that radio.  A Merry Christmas and Happy
> Holiday season to you and yours --- Kindest regards Jim K9AXN
>
>> Message: 1
>> Date: Mon, 22 Nov 2010 12:01:57 -0500
>> From: ss409ss at aol.com
>> Subject: [Hallicrafters] SR-2000 Audio
>> To: Hallicrafters at mailman.qth.net
>> Message-ID: <8CD587E1B405088-1F8C-280E9 at webmail-d073.sysops.aol.com>
>> Content-Type: text/plain; charset="us-ascii"
>>
>>
>>
>>  Thanks Walt and Jim,
>>
>>   I had to remove the case to get at L-15 and L-16. The advancement of
>> those two controls yielded muddy audio from the speaker so I moved them
>> back and checked the test point with a freq counter. I also set the
>> carrier null while I was in there. I found that the function switch was a
>> big issue with this one, the radio emits a carrier in ssb, pulling
>> slightly on the switch and it goes away, also if the switch doesn't have
>> the same tension on it, the USB osc will drop out on occasion.
>>
>>  I am currently working on that function switch, I took many pictures 
>> then
>> I took it out and all apart, cleaned it, reset the wipers and contacts 
>> and
>> put it back in. I am head scratching on the wire placement for a few of
>> the connections but this was late last night so I went to bed and figured
>> I would get up with a clear head and finish it up looking at my pics, the
>> problem is the bottom wires that I couldn't get at with my camera. I did
>> mark all of them down on paper as I took it out but you know how that
>> goes..lol  Regards, Richy N2ZD
>
>
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