"Antonio Vernucci" wrote in message

Tony I0JX


Tony, this has been discussed numerous times on the
AntiqueRadios.com forums. Yes, it will work, and apparently
it works quite well by all reports. The problem is core
saturation, as you suspected. You will probably get a bit
less audio (before clipping) than you anticipated for a given
core size. If you have a few filament transformers, it might
be well worth your time to experiment and try it for yourself.
Since most filament transformers are designed for secondary
currents in amps, it is logical that they will handle a watt of
audio without much issue.

Increasing the gap between E and I core laminations will
to reduce saturation will dramatically reduce the low
frequency response.

73

Peter K1ZJH