[Heathkit] HW100 final load cap

Bwana Bob wb2vuf at verizon.net
Sat Mar 5 09:37:46 EST 2011


Dick, I think that you need to bite the bullet, take the cage off and 
put some grease on the ball bearings.  A solvent like WD-40 will clean 
the old grease out, but you must them pack in new grease to protect the 
bearings.

I got tired of replacing broken belts, so I did the dial cord mod on the 
final loading control. It is not hard to do. The procedure is found in 
the SB-102 manual.  I'd like to replace the driver/preselector belts on 
my HW-100. That is a  little more involved, but it can be done. I saw a 
description of the job with photos somewhere on the www.

             73,

             Bob WB2VUF

On 3/4/2011 6:55 PM, Dick KF4NS wrote:
> Yep, that was it. The reading is now .0014 ohms.I did manage to get
> the oil (SB Blaster) out of the between section bushings but then the
> shaft REALLY tightened up. I did not clean the front bearing of any
> lubricants, so I proceeded to apply contact cleaner to it followed by
> a squirt of liquid wrench L3 which is a penetrant/lubricant. It seemed
> to free up a bit but stiffened right up again. Wish there was a way to
> spin the pulley for a period of time but can't because of the stops on
> the cap.
>
> If there was ever a need for dial string design, this would be the it,
> or better, a direct shaft connection. The belt is as tight as it can
> be and is fairly new. It must be the original grease that has
> hardened. I am thinking of applying heat to the shaft to try to
> extricate some of that old grease. Running out of ideas here.
> 73, Dick KF4NS
> St Petersburg, FL 33714 USA
> Keep The Glow!
>
> ----- Original Message -----
> From: "Bob Macklin"<macklinbob at msn.com>
> To: "Dick KF4NS"<kf4nsradio at verizon.net>;<heathkit at mailman.qth.net>
> Sent: Thursday, March 03, 2011 7:48 PM
> Subject: Re: [Heathkit] HW100 final load cap
>
>
> : Check the continuity between the shaft and frame while you rotate
> it!
> :
> : Bob Macklin
> : K5MYJ
> : Seattle, Wa.
> : "Real Radios Glow In The Dark"
> : ----- Original Message -----
> : From: "Dick KF4NS"<kf4nsradio at verizon.net>
> : To:<heathkit at mailman.qth.net>
> : Sent: Thursday, March 03, 2011 4:36 PM
> : Subject: [Heathkit] HW100 final load cap
> :
> :
> :>  Yea, the demon has hit me too. That darn C924 variable load cap
> got
> :>  too tight. I had no desire to disassemble the whole cage, Now the
> real
> :>  problem. I got it to free up by squirting penetrating oil on the
> :>  bearing and all the bushings for the three sections. Afterwards I
> :>  tuned up and found that the normal functioning control has stopped
> :>  functioning except at the full ccw position tuning into a
> calibrated
> :>  50ohm dummy load. Used to work, now caput.
> :>
> :>  What evel doth I do?
> :>
> :>  73, Dick KF4NS
> :>  St Petersburg, FL 33714 USA
> :>  Keep The Glow!
> :>
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