[Milsurplus] Fwd: Bear ''raslin', or, "The ATC and Me" (Very Long)

[mac]

> From: mac <w7qho at aol.com>
> Date: July 4, 2010 1:54:10 PM PDT
> To: Old Tube Radios <boatanchors at theporch.com>
> Subject: Re: Bear ''raslin', or, "The ATC and Me" (Very Long)
> Reply-To: w7qho at aol.com
>
>
>
> On Jul 3, 2010, at 11:55 PM, <arc5 at ix.netcom.com>  
> <arc5 at ix.netcom.com> wrote:
>
>> I have resurrected some hard-case BAs, but I ain't never had as  
>> tough a "bear" as this ATC................. I
>
> (and on and on for several pages)
>
> ***********
>
> Wow,
>
> "Did" my ATC almost 20 years ago and have advised/assisted in the  
> successful resurrection of half a dozen ATC/ART-13s since but never  
> ran into any thing like reported case.  Had no manual first time  
> around,
> only a schematic.  Pulled and cleaned up a frozen autotune head on  
> the PTO but don't recall any particular difficulty "figuring out "  
> what was going on mechanically and electrically  as I went along.   
> Have to admit to not pre checking the continuity of any of the  
> ground points but ran into no particular problems in this area then  
> (or since).  I was warned about the trimmers in the multiplier/ 
> exciter section and found the hair dryer treatment to work just  
> fine.  Encountered a leaky coupling cap (mica) early on.  Buried way  
> down in the chassis  but was able to resurrect it by applying a  
> couple hundred volts across it for a few hours.  Got about 5 more  
> years use out of it before finally having to replace in an  
> electrical but not physical equivalent location.  Some lube points  
> certainly not easy to reach but was able to do so with the aid of a  
> hypodermic oiler and gobs of grease on the end of a wire.  Came up  
> with a mod to excite the autotune drive motor field only during the  
> autotune cycle, not continuously as originally designed (schematic  
> on request).  Also added a mod to give complete 160M coverage (see  
> ER#32, Dec. 1991).
>
> Anyway, my ATC is still going strong and a great number of these and  
> '-13s in use on the air.  Dave's friend is certainly going to get a  
> totally restored and very fine piece of equipment.
>
> Dennis D. W7QHO
> Glendale, CA
>