[NostalgiaRadioTime]

Hi Levi,

I've watched Buzz's videos on the Sparton and, while it's a similar high end, high tube count radio, it is quite a bit different than this Silvertone.

I think I have the motorboating problem solved after fiddling with the flash tuning relay and contacts. I can see why they only used this feature one year. As I've read it was notoriously troublesome even when new.

If you're curious, here is a little demo video of someone else's 4588 showing how the flash tuning works:

https://www.youtube.com/watch?v=EpleHtaBvoo

Thanks for your input!