[R-390] 1960 S-W 390A Redux #1: The PTO Pt. 1 of 2

[Norman Ryan]

 Hi, Jordan,
Given the reasons Larry cites, one ordinarily doesn't need the PTO oven switched on.  After warm-up in the typical radio shack, the ambient temperature is reasonably steady.  I think the original design was meant to accommodate extreme operating temperatures one might encounter in the field.
Thanks for sharing your PTO experience.
73 de Norman


    On Sunday, August 21, 2022 at 09:23:08 AM EDT, Jordan Arndt <outposter30 at shaw.ca> wrote:  
 
 Hi Larry...Thanks...

I see I transposed the production years in my first two paragraphs. I'm working on a 1960 S-W and used a working 1959 S-W to test the modules. Sorry for any confusion about that...!

Yes. I wanted to test the PTO oven and thermostat to ensure it worked properly, and it does. I have a Cosmos PTO that the oven did not shut off and actually melted the dessicant envelopes and the resulting mess had to be cleaned up before I worked on that one. I leave the ovens switch off in operation.

Thanks again and more to follow...

73...Jordan VE6ZTemail list: http://www.qsl.net/donate.html