[R-390] Clutch!

[G4GJL]

Thanks for that, Barry.

You have prompted me to tak a closer look at the clutch designs. I seem to 
recall about 90deg was all you needed on one or two sets I have played with 
at a local Ham's QTH..

I think you would be right to remove all / ther MAX amount of stray oil / 
grease etc. I dont think it would help the clutch bite at all.

Im doing a couple of St Juliens rebuilds at the moment , so I have the 
opportunity to get to grips with the designs at CLOSE quarters! Thanks for 
the comments.

73

Pete
G4GJL


----- Original Message ----- 
From: "Barry" <N4BUQ at aol.com>
To: "G4GJL" <g4gjl at btopenworld.com>; "R-390-List" <R-390 at mailman.qth.net>
Sent: Monday, May 16, 2005 7:07 PM
Subject: Re: [R-390] Clutch!


> For the new one, it is about 180 to 270 degress from the point at which I
> can feel the disk first engage the posts to where the clutch is 
> disengaged.
> When it does disengage, the geartrain is immediately freed from the PTO; 
> not
> exactly so on the older (Motorola) one.
>
> On the older one, it doesn't seem that much different, but when the clutch
> disengages, it isn't quite fully disengaged until I rotate the KC knob a
> bit.  It's as if something is sticking and it takes a slight bit of
> rotational force to free it.  Once that happens, it rotates pretty freely.
> I'm thinking it may have some sticky residue somewhere on the clutch disks
> that still needs to come off.  I tried it oiled which did not work very 
> well
> at all.  The oil caused the plates to stick together big time.  It should 
> be
> dry at this point, but maybe some of the Mobil One got into it.  Either 
> that
> or there is something else sticking.
>
> Thanks,
>
> Barry - N4BUQ
>
> ----- Original Message -----
> From: "G4GJL" <g4gjl at btopenworld.com>
> To: "Barry" <N4BUQ at aol.com>; "R-390-List" <R-390 at mailman.qth.net>
> Sent: Monday, May 16, 2005 8:22 AM
> Subject: Re: [R-390] Clutch!
>
>
>> Barry, et al.,
>>
>> How many degrees of rotation do you need to get satisfactory
> disengagement?
>>
>> My 390As all seem to need 270 to 360 deg. My R391 needs a lot
>> less....maybe90deg only.
>> Is there a difference in the designs here? I have not had the 391 apart 
>> to
>> look at the mechanism closely.
>>
>> Pete
>> G4GJL
>>
>>
>> ----- Original Message -----
>> From: "Barry" <N4BUQ at aol.com>
>> To: "R-390-List" <R-390 at mailman.qth.net>
>> Sent: Sunday, May 15, 2005 4:47 AM
>> Subject: [R-390] Clutch!
>>
>>
>> > So, this is what it's like to have a clutch that works properly!  I
>> > rebuilt
>> > the clutch mechanisms in both my R309A's.  The Motorola has always been
>> > sticky.  Disengage the clutch and the VeederRoot still moves a bit 
>> > until
> I
>> > rock the KC knob a bit.  On the "new" one (Teledyne), disengage the
> clutch
>> > (and I can really tell that it disengages) and the VeederRoot counter
>> > stays
>> > very still and I can adjust zero very easily.
>> >
>> > So much fun...
>> >
>> > Barry - N4BUQ
>> >
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>>
>>
>
>