[R-390] Big Mistake Please Help

Fri, 19 Dec 2003 17:19:16 -0800 (PST)

You did the right thing by asking for help, but this is not really a big deal
(unless you proceed without help then it can become a big deal).

The methods mentioned hearin all can work.

You can do an initial setup by knowing this:

- the 10 turn stop on the RF deck has a range of 10.7 turns (what the? I
thought it was 10!).

- the PTO has a greater range, about 15 turns from its stop-stop (give or take
for different makers).

- So just set your RF deck on a known spot (like 000) and then install the PTO
about 2.5 turns from its stop (from the proper end of course).

- now you can listen for you local AM stations and check for the amount of KC
error and correct it.

The 390 and 390A have the same output in frequency on the PTO, that is on 000
the PTO will generate 3455 kcs, at the top end of its range it generates 2455
KCS. If you have a frequency counter, this is the safest way to set it up.

Good luck,

Tom N5OFF
--- David Hallam <[email protected]> wrote:
> Ronnie,
> 
> Don't know about the 390A but on the 390 the end points of the PTO are 3.455
> and 2.455 MHz.  If you use your frequency counter to set the PTO to 2.955
> MHz and set the counter to 500, you can lock the shaft to your tuning knob.
> 
> David
> KC2JD
> 
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Ronnie Davis
> Sent: Friday, December 19, 2003 5:48 PM
> To: [email protected]
> Subject: [R-390] Big Mistake Please Help
> 
> Hello
> Well all was going well with the Capehart R-390A until last night. I pulled
> the RF Deck out to start working on it, and after cleaning for sometime, I
> remembered that I did not set the PTO to 8 Mhz before pulling the deck?
> After I remembered that I just thought about messing up big time! I had
> already been turning the Mhz change knob to clean the deck, and the
> kilocycle change knob has also been turned for cleaning. So the problem is,
> that I have no idea where the PTO was at when I pulled the RF Deck? I knew
> better than this, I knew from the manuals and the videos that I should have
> put the PTO on 8 Mhz but while in the heat of working on it I just slam
> forgot. Please tell me there is a way to find out where the PTO is so I can
> install the RF Deck when I finished with it. Sure hope I did not mess up to
> bad? Again a Stupid Beginners Mistake
> Thanks again
> Ronnie
> KE4VPN
> 
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