"Ken" wrote in message
...
Randy or Sherry Guttery wrote:
Dave Burson wrote:
best regards...
So with high B+ current, the xfmr is saturated, less bucking, lamp is
bright? That means the bulb dims when on station? Ken

Core saturates, and windings lose their inductance, basically becoming
purely resistive (only the wire winding DC resistance with no reactance),
the light would be brighter.

Pee

In article ,
"Uncle Peter" wrote:

"Ken" wrote in message
...
Randy or Sherry Guttery wrote:
Dave Burson wrote:
best regards...
So with high B+ current, the xfmr is saturated, less bucking, lamp is
bright? That means the bulb dims when on station? Ken

Core saturates, and windings lose their inductance, basically becoming
purely resistive (only the wire winding DC resistance with no reactance),
the light would be brighter.

The problem with this explanation is that the two secondaries appear to
be connected so that they "buck" one another. If that is the actual
case then the reactance of the two series connected secondary windings
wouldn't change much with transformer saturation.


Regards,

John Byrns

--
Surf my web pages at, http://fmamradios.com/

John Byrns wrote:

The problem with this explanation is that the two secondaries appear to
be connected so that they "buck" one another. If that is the actual
case then the reactance of the two series connected secondary windings
wouldn't change much with transformer saturation.

Yes, I agree - I think its more of the coupling increasing and
decreasing causing more or less bucking between the windings. The
decrease in inductance (at 60 cycle) would not be near as influential as
the loss of coupling... Then again - as you noted - physical layout
could have very significant impact on both / either... hmmmm...

It is an interesting application. Didn't GE have something like this in
some of their consoles? I've never had one in for service - but it seems
I recall reading something about them.

best regards...
--
randy guttery

A Tender Tale - a page dedicated to those Ships and Crews
so vital to the United States Silent Service:
http://tendertale.com

Uncle Peter wrote:
"Ken" wrote in message
...
Randy or Sherry Guttery wrote:
Dave Burson wrote:
best regards...
So with high B+ current, the xfmr is saturated, less bucking, lamp is
bright? That means the bulb dims when on station? Ken

Core saturates, and windings lose their inductance, basically becoming
purely resistive (only the wire winding DC resistance with no reactance),
the light would be brighter.

Pee


But the core saturates on high current, that's off station. So the light
is bright off station and dim on. It would make sense to have the lamp
brighten on station, but I have seen other schemes work like this. Ken