[Collins] removing and disassembling a 70E-8A PTO in a 310B?

[Dr. Gerald N. Johnson]

On Fri, 2008-06-27 at 05:15 +0000, John Page wrote:
> Yes, That would be great. I have never seen caps like these.

Collins used those uncoated capacitors in the PTO tuned circuits for
temperature compensation too. They sure were specials, but in quantity
probably lower cost than standard temperature compensating capacitors
and the lack of coating kept their response to temperature changes
rapid.

> I kept a couple of them. I also had trouble with seized  tuning slugs.
> Got them all loose except one and it broke. I repaired it and it
> worked fine. This 310-B had the B&W coil turret installed in it so I
> don't have to change plug in coils.

The article in the 1948 Radio Handbook by Editors and Engineers shows
the turret.

> The cabinet on it looks like new. It is definitely a keeper. John
>  See my Collins stuff at  < http://www.qsl.net/k4kwm >
> 
> John Page K4KWM
> Hollow State since 1953
> (ex W8PKU,N8BLB,NA8O)
> 
> > Subject: RE: [Collins] removing and disassembling a 70E-8A PTO in a
> 310B?
> > From: geraldj at storm.weather.net
> > To: k4kwm at hotmail.com
> > Date: Thu, 26 Jun 2008 22:47:02 -0600
> > 
> > On Fri, 2008-06-27 at 03:12 +0000, John Page wrote:
> > > I have had a 310B for a couple of years now. All the bypass caps
> were
> > > ceramic material about an inch long an about 3/8 inch wide and
> very
> > > thin. All were bad. Some were a pain to replace, but I replaced
> them
> > > all. with a new 2E26 and a proper alignment it will put out over
> 20
> > > watts. I use it quite often. John
> > > 
> > > John Page K4KWM
> > > Hollow State since 1953
> > > (ex W8PKU,N8BLB,NA8O)
> > 
> > John, that would be good information to post to the cra list. May I?
> > 
> > -- 
> > 73, Jerry, K0CQ, Technical Advisor to the CRA
> > All content copyright Dr. Gerald N. Johnson, electrical engineer
> > 

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer