[R-390] R-390 non A 12khz jump

[Kevin Schuchmann]

Thanks to Tisha and Jacques,

   It is a model 1 PTO and I have started the disassembly  and will check those capacitors closely.

Kevin



On Friday, December 27th, 2024 at 10:32 AM, Tisha Hayes <tisha.hayes at gmail.com> wrote:

>
>
> I would suspect a capacitor in the PTO circuitry that is on the verge of
> failing.
>
> A can of freeze spray may help you isolate the specific component; Maybe
> even tapping on caps/resistors with the tip of an insulated tool might help
> identify if there is a cracked component that works differently.
>
> The ballast tube would not be so 'precise' in causing a 12 KHz offset. It
> is also a very simple thermonic device with an iron filament in a hydrogen
> atmosphere that is just a current regulator.
>
> Ms. Tisha Hayes, AA4HA
>
> "We live in accordance with the flow of the times"
> -Yoshio Mizuno
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