[R-390] Fwd: Re: 390A contractors

[Stan Gammons]

-------- Forwarded Message --------
Subject: 	Re: [R-390] 390A contractors
Date: 	Wed, 19 Oct 2016 20:08:00 -0500
From: 	Stan Gammons <s_gammons at charter.net>
To: 	Bob Camp <kb8tq at n1k.org>



Speaking of the PTO. The R-390A I had, and was an idiot to let it go,
had a Cosmos PTO.  I seem to recall it had a screw with a rubber washer
on it that was removed so one could adjust the linearity of the PTO.
There looked to be some sort or tiny trimmer that you adjusted.  Were
all PTOs like this?  Who made the "best" PTO?


73

Stan
KM4HQE


On 10/19/2016 06:26 PM, Bob Camp wrote:
> Hi
>
> Simple answer on the PTO’s is that they didn’t stay in spec forever and ever. Buying new ones was a lower cost
> alternative to reworking them in the field or even at the depot level. 20+ years after they built the last one, the assembly
> girls at Motorola still had nasty things to say about setting up PTO’s …..
>
> Bob
>
>> On Oct 19, 2016, at 6:46 PM, wb3fau55 at neo.rr.com wrote:
>>
>> So in the subject of contractors,  were there suppliers of just subchassis?  I have been told that Teledyne, Amelco, and Imperial all worked together  to build their radios.  So we know of 5 contractors of PTOs-  Collins, Cosmos, Motorola,Dubrow, and Progressitron.  Perhaps others?
>>   So my real question is were running spares made up separate?  I know there were new IF strips made.  I saw some at a hamfest.  As always,  fascinating info.  73s Russ.
>> ______________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:R-390 at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html