Hey all...

Been a long while since I posted here...

Anyone here have any experience with radios from the 1920's. I'm
restoring my first pre war model.

I've got a three dial five tuber neutrodyne casket radio. They use the 201A
tubes. 90 volts for the tube plates and normally powered by "b" cells and
on the "a" cell line, they take the 6.5 volts for the filaments, and 45
volts on the detector. I'm gonna juice it up with an Arbe III once I
locate a schematic and figure out what goes where.

I'm still not sure about the "neutralizing" procedure. Covering up a
filament pin and so on...

Anyone here actually ever neutralize a neutrodyne before ???

Thanx in advance...

Michael

Those old radios were not grounded.Be careful, don't let that old radio
electrocute you.

There is a newsgroup where some people work on and restore old radios.It
isn't alt.binaries.pictures.radio newsgroup, but ask those folks in
there.
cuhulin

wrote in news:14089-4994C09E-1052@storefull-
3171.bay.webtv.net:

Those old radios were not grounded.Be careful, don't let that old radio
electrocute you.

There is a newsgroup where some people work on and restore old radios.It
isn't alt.binaries.pictures.radio newsgroup, but ask those folks in
there.
cuhulin


I'm sure a battery operated radio will eletrocute someone. Why don't you
educate youeself before opening your mouth?

elaich wrote:

I'm sure a battery operated radio will eletrocute someone. Why don't you
educate youeself before opening your mouth?

You're thinking that a battery operated radio is a transistor radio. Vaccum
tubes generally use higher voltages. If you had read the original post,
you would have seen that one of the batteries was 90 volts. That's enough
to kill you if you are not careful.

Ironicaly, at about the time the transistor was invented, low voltage,
cold cathode (no heater) miniture tubes were developed. but that was 20-30
years AFTER this one was made.


That's also where the battery terms, a,b,c etc came from. An A battery
was a cathode (heater battery), a B battery was the high voltage
and a C battery was a "bias" voltage.

A batteries were generaly 1.5 volts (single carbon/zinc cells), but B
batteries ranged from 45 to 90 volts. There was a special 512v battery
used for electronic flashes in the 1950's, but I don't know if it
was called a B battery or not, I've always heard of it referred to
as a 512 volt photo battery.

It would have made a nice B battery for a small radio transmitter.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM

elaich wrote:
wrote in news:14089-4994C09E-1052@storefull-
3171.bay.webtv.net:

Those old radios were not grounded.Be careful, don't let that old radio
electrocute you.

There is a newsgroup where some people work on and restore old radios.It
isn't alt.binaries.pictures.radio newsgroup, but ask those folks in
there.
cuhulin


I'm sure a battery operated radio will eletrocute someone. Why don't you
educate youeself before opening your mouth?

A 90 VDC battery can delivery a lethal shock.

On Thu, 12 Feb 2009 23:33:05 GMT, "Michael"
wrote:

Hey all...

Been a long while since I posted here...

Anyone here have any experience with radios from the 1920's. I'm
restoring my first pre war model.

I've got a three dial five tuber neutrodyne casket radio. They use the 201A
tubes. 90 volts for the tube plates and normally powered by "b" cells and
on the "a" cell line, they take the 6.5 volts for the filaments, and 45
volts on the detector. I'm gonna juice it up with an Arbe III once I
locate a schematic and figure out what goes where.

You might post your question on rec.antiques.radio+phono....lots of
folks there with the knowledge you're looking for.

rec.antiques.radio+phono
That is the newsgroup I was thinking about, but I couldnt remember.

I used to go there, untill they ran me out.
cuhulin

wrote:

rec.antiques.radio+phono
That is the newsgroup I was thinking about, but I couldnt remember.

I used to go there, untill they ran me out.
cuhulin


Your drunkard lifestyle and bestiality may have been contributing factors.





mike

I quote General Anthony McAuliffe.
NUTS!
cuhulin