1920's radios ???
 

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

1920's radios ???
 

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

1920's radios ???
 

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.

1920's radios ???
 

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

1920's radios ???
 

1920's radios ???
 

I quote General Anthony McAuliffe.
NUTS!
cuhulin

1920's radios ???
 

1920's radios ???
 

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

1920's radios ???
 

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.

1920's radios ???
 

I've never heard/read a single thing about 1930's battery radios. The ones
I know about were all from the 1920's. They take the 201 and 301 tubes.
Most were made to take 6.5 volts for the filaments as car battery
rechargabe wets of the time were all 6.5. Here is the interesting thing.
Those tubes dont need that much juice. The rigs bump it down from 6.5.
There were some 201 and 301 tube radios that have direct voltage to the
tubes. If you hook up 6.5 volts to the filaments, kiss the tubes goodbye.

I'm still trying to figure out what to do with this King-Hinnes Silvertone
Neutrodyne that I have here. The manual I have that may very well be a "one
size fits all" calls for 3 "A" cells. That would mean about 4.5 volts.

I'm gonna juice it up soon. I'm not sure if either the tubes or the
transformers are good. The speaker horn is at least good as I can hear a
click when I give it low voltage.

Michael

"norml" wrote in message
...
I have an eight-tube, RCA portable from 1930 that requires 180V on the
plates. It was originally supplied by four 45V batteries. I built a wooden
jig to hold 20 9V batteries. It looked so harmless--until my finger
brushed
across the output terminals.

Norm

(Geoffrey S. Mendelson) wrotf:

elaich wrote:

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

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.

1920's radios ???
 

Those whatchamacallit static electricy belt thingys.Thousands/a million
or more harnless volts that will make your hair stand up.I have always
wanted to own one of those gadgets.
cuhulin

1920's radios ???
 

"Michael" wrote in message
...
I've never heard/read a single thing about 1930's battery radios. The
ones I know about were all from the 1920's. They take the 201 and 301
tubes. Most were made to take 6.5 volts for the filaments as car battery
rechargabe wets of the time were all 6.5. Here is the interesting thing.
Those tubes dont need that much juice. The rigs bump it down from 6.5.
There were some 201 and 301 tube radios that have direct voltage to the
tubes. If you hook up 6.5 volts to the filaments, kiss the tubes goodbye.


01A/201/301/etc. used 5V filaments. Many radios using these tubes ran
6.5/6.6V auto batteries and had an adjustment to allow for voltage to the
filaments to be varied so that as the battery ran down, you could turn the
voltage back up a bit, thereby getting longer use out of a charge of the
battery.

1920's radios ???
 

Michael wrote:
"Brenda Ann" wrote in message
...
"Michael" wrote in message
...
I've never heard/read a single thing about 1930's battery radios. The
ones I know about were all from the 1920's. They take the 201 and 301
tubes. Most were made to take 6.5 volts for the filaments as car battery
rechargabe wets of the time were all 6.5. Here is the interesting thing.
Those tubes dont need that much juice. The rigs bump it down from 6.5.
There were some 201 and 301 tube radios that have direct voltage to the
tubes. If you hook up 6.5 volts to the filaments, kiss the tubes
goodbye.

01A/201/301/etc. used 5V filaments. Many radios using these tubes ran
6.5/6.6V auto batteries and had an adjustment to allow for voltage to the
filaments to be varied so that as the battery ran down, you could turn the
voltage back up a bit, thereby getting longer use out of a charge of the
battery.

I was mistaken about those tubes, then... I thought the 01A filaments took
less then 5 volts.

Michael



http://www.xs4all.nl/~tgale/oradio/faq3.html

1920's radios ???
 

...
I've never heard/read a single thing about 1930's battery radios. The
ones I know about were all from the 1920's. They take the 201 and 301

Battery radios were made clear into the 1950s or so for use on farms
where there was no commercial AC power. Also there were portable tube
radios that ran on batteries.

1920's radios ???
 

In article ,
ldomain says...
...
I've never heard/read a single thing about 1930's battery radios. The
ones I know about were all from the 1920's. They take the 201 and 301

Battery radios were made clear into the 1950s or so for use on farms
where there was no commercial AC power. Also there were portable tube
radios that ran on batteries.


I had a Zenith SW that used and ate batteries at a phenomenal rate. Made
in 1952. Had nice audio, but if you played it loud, you sure didn't play
it very long. Batteries cost a lot of money too, and were pretty hard to
find.
--
BDK

BDK Klan leader?
kOOk Magnet!
NJJ CLUB #1
Shillmaster

1920's radios ???
 

On Feb 14, 5:55*pm, Jim Haynes wrote:
...
I've never heard/read a single thing about 1930's battery radios. *The
ones I know about were all from the 1920's. *They take the 201 and 301

Battery radios were made clear into the 1950s or so for use on farms
where there was no commercial AC power. *Also there were portable tube
radios that ran on batteries.

Take a Windmill or Water Wheel plus
an old Car/Truck 6 VDC Generator and
Regulator and a 6 Volt Battery.

Lot of 'far out' rural and country places
still had old 12 Volt Lights for use for a
few hours at night.

~ RHF