[SADXA] RFI

[Wes]

By inspection of the schematic (but not measurement since I'm under orders to 
not mess with this until the heatwave is over) I'm suspecting the run capacitor 
is leaky.  This would allow the starting relay to energize.  I'm not sure why it 
would quickly deenergise and become an oscillator but clearly this is an LC 
phenomenon so absent further troubleshooting, I'm running with the idea.

By serendipity Annette had something to pickup at 12:30 today about a quarter 
mile from Grainger so I looked at their website for a capacitor.  They had one 
shown in stock, not the right size but the right capacitance and voltage 
rating.  So I ordered it, figuring I can make it work.  They are using curbside 
PU so when I got there the guy looks and tells me that the part won't be here 
until tomorrow.  Sure enough that's what it said on the paperwork that I was in 
too much of a hurry to read.

When we got home I looked on their site to see where I went wrong.  That part 
was no longer shown in stock, but another better one (more $$) was.  So I called 
them up (800 number) and asked them to cancel the original order and save me the 
new one.  He said sure but when he came back to the phone he said that even 
though it was shown in stock, it too wouldn't be available until tomorrow.

I'm sure glad this thing is still running.

Wes  N7WS


On 7/8/2020 1:00 PM, W7EXG (Bill) wrote:
> Hi Wes,
>
> That's Great.
>
> I love helping out, when I really didn't do anything!! Hi Hi
>
> Sometimes, all it takes is a memory jog!!
>
> Good Luck.
>
> If you need any help with the schematic, especially if it involves IC
> questions, let me know. I might have the same schematic (or similar section)
> here!! (Or scan and send me the section of interett)
>
> 73's
> Bill W7EXG
>
>
> -----Original Message-----
> From: sadxa-bounces at mailman.qth.net [mailto:sadxa-bounces at mailman.qth.net]
> On Behalf Of Wes
> Sent: Wednesday, July 08, 2020 10:14 AM
> To: sadxa at mailman.qth.net
> Subject: Re: [SADXA] RFI
>
> Hi Bill,
>
> Thanks for your reply.  Your mention of a schematic in the box jogged my
> memory
> and I've discovered a weathered copy of a schematic that I removed from the
> box
> years ago and filed away for safekeeping.  It's hard to read but I'm
> scanning it
> and trying to improve readability.
>
> We'll see if it helps.
>
> Thanks again!
>
> Wes
>