[GreenKeys] Fw: Re: Testing My Model 15 KSR

[WA5CAB at cs.com]

That is strange.  I've owned around 30 I guess of 14, 15 or 19 sets.  And 
as I said earlier, only maybe two had holding magnet selectors.  However, 
except for the first one, which came from Ma Bell, all have probably been 
military, not civilian.  

In a message dated 4/17/2010 8:58:38 PM Central Daylight Time, 
kf9nz at juno.com writes: 
>         On the contrary every M15 I ever worked on was a holding magnet. 
> The rangefinder plate was always stamped HM and most had the toggle
> switch.   Whenever a 15 started to loose range or start printing jumk
> intermittently, the usual quick fix was to loosen the magnet mounting
> screws and adjust it so the cam pushed the armature against the magnet a
> little harder.
> 
> Frank
> 
> John,
> 
> To add to or comment on what's already been posted, relatively few Model 
> 14/15/19 will run on 20 mA.  That requires different magnets in what's
> called 
> a "Holding Magnet" selector.  The majority come with a "Pulling Magnet" 
> selector.  You can tell the difference by the fact that the pulling
> magnets are 
> cylindrical and the holding magnets are rectangular in cross section. 
> I've 
> had in my lifetime maybe 30 14's or 15's and only about two had holding 
> magnets.  However, the first M15 I ever had (in 1962) had holding
> magnets.  So 
> they do turn up.  But both of the ones I recall having had a selector
> toggle 
> switch, too.  I can't certify that all did.
> 
> You can't rewire a pulling magnet selector for 20 mA.
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480