Radioman390 wrote:

My friend Mario Ribaldi ) has written me with a question
about restoring tube radios. Can anyone help him?

Mi amigo:
Me restore project of radio Geloso 217 is begun. I may ask how to restore valve
activation (what you Americans call tubas) for no strong emission. I find
website that American place tube in specail place. Can this help restore
activity? The report is from SURGERY MAGAZINE by Doctore Dabid Busch in
Wisconsin, Madison.
The referencia es http://www.well.com/www/cynsa/newbutt.html

Can you make clear to me how this helps?



I think what he's asking is if American tube types can be used in
European radios. And the answer is yes, if it's a post WW2 set. He'll
need to find a cross reference table on the net. There's a newsgroup
devoted to old tube radios, rec.antiques.radio+phono, but most of the
posters are Americans.

Years ago, there were some devices available to rejuvenate sick tubes, both
CRTs and the little fellows. Sometimes it worked. Sometimes it didn't. It all
depended upon the problem with a given tube.

One scheme for weak emission was an in-line plug-in device to jack up the
filament voltage a bit. Again, sometimes...

Bill, K5BY