[Hammarlund] vibrating hum on sp600?

[Todd, KA1KAQ]

On Thu, 31 Mar 2005 15:21:54 -0500, GBrown <gkbrown at gwi.net> wrote:
> If it is loose laminations, just put the tranny in the oven at 200 degrees
> for and hour. This will help to melt the potting tar and reseal the
> laminations and hopefully, cure the humming (buzzing). This does work, I
> have done it on several occasions.

Interesting advice, Gary - never tried that before, but it does make
sense. I do make a habit of baking all old transformers in the oven
for a while before use anyhow, to drive the moisture out. Maybe that's
why...

73, Todd/'Boomer'  KA1KAQ