[Collins] In Re: KWS-1

[Dr. Gerald N. Johnson]

That link doesn't work.

73, Jerry, K0CQ

On 10/22/2010 12:04 PM, Roger Shultz wrote:
> There is a wonderful link to KWS-1 blower repair by Jim, W8ZR at
> http://www.miami.muohio.edu/president/personal/w8zr/vintage/transmitters/kws
> 1fan.htm
>
> 73, Roger, NJ2R
>
> -----Original Message-----
> From: collins-bounces at mailman.qth.net
> [mailto:collins-bounces at mailman.qth.net] On Behalf Of Dr. Gerald N. Johnson
> Sent: Friday, October 22, 2010 11:49 AM
> To: collins at mailman.qth.net
> Subject: Re: [Collins] In Re: KWS-1
>
> I'll agree with that. To get oil into a sealed bearing you can take the
> bearing out and lay it flat on a light bulb. Put a couple drops of fine
> sewing machine oil on the seals. Turn on the light bulb and let it heat
> the bearing (incandescent lamp, probably 60 or 100 watt), you should see
> air bubbling occasionally through the oil. When its hot, turn off the
> lamp and as it cools it will inhale the oil. You might want to replenish
> that oil supply as it cools and inhales all of it or repeat the heat and
> cool cycle. This also works for sealed clock telecron motors.
>
> But if the bearing was rough besides being stiff oil may not help, metal
> may have migrated from the races to the balls or visa versa making it
> rough and oil won't help that. Then you need bearings. The bearings
> should have a number and should be available from a good bearing
> distributer, or Baum Hydraulics, www.baumhydraulics.com, McMaster-Carr,
> www.mcmaster.com or Small Parts www.smallparts.com.
>
> Before you take the motor apart, its a good idea to scribe alignment
> marks for the end bells. Then take out the four long bolts and with a
> small hammer tap the end bells radially and they will pop off. I can't
> predict whether the bearings will stick to the motor shaft or to the end
> bell. Then on assembly line up the scribe marks so the holes in the end
> bells match the holes in the core for the long bolts.
>
> A blower running significantly slow will not cool the PA tubes properly
> and they will be damaged.
>
> 73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association
>
> On 10/21/2010 9:04 PM, Fern wrote:
>>        I'm fortunate that the blower in my recently acquired kws-1 does
> come
>> to speed right away. I do know of another ham where his blower takes a
> while
>> to get up to speed so I spoke to Dennis Brothers about that he suggested
> to
>> give the blower bearings a good lubrication and if that doesn't fix the
>> problem then one should look at replacing the bearings in it.
>>       73 from Fern  VE7GZ
>>
>>
>> ----- Original Message -----
>> From: "Greg Mijal"<bluebirdtele at embarqmail.com>
>> To: "Dutch Maurer WB7DYW"<wb7dyw at yahoo.com>;<collins at mailman.qth.net>;
>> "Fern"<crc at cyberlink.bc.ca>
>> Sent: Thursday, October 21, 2010 10:49 AM
>> Subject: In Re: KWS-1
>>
>>
>>> Speaking of blowers and such:
>>>
>>> Is there anyway to determine if the blower is running at proper speed?
>>> The
>>> KWS-1 that's slowly coming out of a long slumber  here has a working
>>> standard KWS-1 blower but it comes up to a maxium speed after about 1
>>> minute
>>> of turning. No squealing at all.  It makes me wonder if  that's normal or
>>> should I replace/repair the blower itself.
>>> Your thoughts?
>>> Greg
>>> WA7LYO
>>> Kinston NC
>>>
>>
>>
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