Hello everyone,

Received an email from a customer that wants to know if i can restore this, ???

Is this a radio or amplifier or something else?

Anyone know?

Thank you,

Mitch

Seems to be a mid-1920s tuned-radio-frequency receiver, as per:

http://www.radiomuseum.org/r/rca_20.html

Might be a challenge to find tubes for this baby.

:Seems to be a mid-1920s tuned-radio-frequency receiver, as per:
:
:http://www.radiomuseum.org/r/rca_20.html
:
:Might be a challenge to find tubes for this baby.
:

If i take this restoration on, will i be able to use 01A tubes in place of the UX-199 and the UX-120 tubes?

Mitch

Mithch

01A's need 5 volts @ .25 amps each while 99's draw 60 ma and 120 draws 120 ma at 3 volts.

Do you have room for larger 01A's? May have problems with rheostats which adjust filament voltage. Won't have proper action and may not hold up to extra current?

You could use 30's for 99's and 31 for 120 tubes. They operate on 2 volts for filament while 99's need 3.

Norm

::Seems to be a mid-1920s tuned-radio-frequency receiver, as per:
::
::http://www.radiomuseum.org/r/rca_20.html
::
::Might be a challenge to find tubes for this baby.
::
:
:If i take this restoration on, will i be able to use 01A tubes in place of the UX-199 and the UX-120 tubes?
:
:Mitch
:

You can use 01A tubes in this radio. You do have to change the filament Rheostat to a higher resistance to give the range for 5 volt tubes. This would be the A supply. This is similar to the Radiola III update for the use of other than the original.

:You can use 01A tubes in this radio. You do have to change the filament Rheostat to a higher resistance to give the range for 5 volt tubes. This would be the A supply. This is similar to the Radiola III update for the use of other than the original.
:

Thank you all for the information. The customer is bringing the radio into my store. Once i have it i will post photos of it. There are no tubes in it. It looks close to the one in radiomuseum but the tubes on this one install out of the front of the cabinet to be viewed from the front.

Mitch

::You can use 01A tubes in this radio. You do have to change the filament Rheostat to a higher resistance to give the range for 5 volt tubes. This would be the A supply. This is similar to the Radiola III update for the use of other than the original.
::
:
:
:Thank you all for the information. The customer is bringing the radio into my store. Once i have it i will post photos of it. There are no tubes in it. It looks close to the one in radiomuseum but the tubes on this one install out of the front of the cabinet to be viewed from the front.
:
:Mitch
:
This is a photo of the radio.

:::You can use 01A tubes in this radio. You do have to change the filament Rheostat to a higher resistance to give the range for 5 volt tubes. This would be the A supply. This is similar to the Radiola III update for the use of other than the original.
:::
::
::
::Thank you all for the information. The customer is bringing the radio into my store. Once i have it i will post photos of it. There are no tubes in it. It looks close to the one in radiomuseum but the tubes on this one install out of the front of the cabinet to be viewed from the front.
::
::Mitch
::
:This is a photo of the radio.
:
:
:

Hello everyone,

I have opted to take this radio on as a restore. Now that i have seen the inside of the chassis it appears to be all there. It came out of a radio phono floor cabinet and it was removed from the cabinet and made as a stand alone radio with batteries. I do not have the batteries or their cabinet but i do have an ARBY (bigger better burger) battery elliminator to power the radio.

I have the schematic from here which is good and gives me the opportunity to trace out the circuit, no problem here.

Does anyone have a schematic with part values? A parts list?

The variable resistors are open, no value to read, the wires are ratted open, no capacitor values on the components. I think i can determine the interstage transformers primary and secondary as direct replacements from other ones i have replaced on other battery radios.

So, i need a parts list if anyone can help.

Thank you,

Mitch

If The Incredible Hulk owned a portable radio, this would have been it.

:If The Incredible Hulk owned a portable radio, this would have been it.

I remember repairing televisions that someone called portable because it had a handle on it. On some of those things, the incredible Hulk would have needed Superman to help him lift them.
Lewis
:

I remember repairing televisions that someone called portable because it had a handle on it. On some of those things, the incredible Hulk would have needed Superman to help him lift them.
:Lewis

Oh, yeah. Makes me remember the first "portable" computer that my company assigned to me, circa 1982: a Compaq. It weighed about 55 pounds, without software. People who were foolish enough to believe the "portable" description and who tried to fly somewhere with one invariably got treated to picking up dozens of its parts on the luggage carousel...

Now, your pocket smartphone has about 10K times the computing power of that dinosaur...

:I remember repairing televisions that someone called portable because it had a handle on it. On some of those things, the incredible Hulk would have needed Superman to help him lift them.
::Lewis
:
:Oh, yeah. Makes me remember the first "portable" computer that my company assigned to me, circa 1982: a Compaq. It weighed about 55 pounds, without software. People who were foolish enough to believe the "portable" description and who tried to fly somewhere with one invariably got treated to picking up dozens of its parts on the luggage carousel...
:
:Now, your pocket smartphone has about 10K times the computing power of that dinosaur...

There could be a physical problem with 01A or type 30 tubes. The regular Radiola 20 in the table model version had plenty of room for these later types. The Orthophonic Radiola 20 chassis were built on a flat panel. It was used in the Victor model Alhambra and also 7-3 and 7-30 where it shared the horn with an Orthophonic Victrola. Victor marketed a small consolette built by RCA with built in Orthophonic horn and no phonograph. This was called the R-20. These have a metal ring where each of the tubes stick out of the panel. Only the original 199s and 120 tube will physically fit. They are relatively easy to repair as the main failure is open audio transformers.
:FR

::I remember repairing televisions that someone called portable because it had a handle on it. On some of those things, the incredible Hulk would have needed Superman to help him lift them.
:::Lewis
::
::Oh, yeah. Makes me remember the first "portable" computer that my company assigned to me, circa 1982: a Compaq. It weighed about 55 pounds, without software. People who were foolish enough to believe the "portable" description and who tried to fly somewhere with one invariably got treated to picking up dozens of its parts on the luggage carousel...
::
::Now, your pocket smartphone has about 10K times the computing power of that dinosaur...
:
:There could be a physical problem with 01A or type 30 tubes. The regular Radiola 20 in the table model version had plenty of room for these later types. The Orthophonic Radiola 20 chassis were built on a flat panel. It was used in the Victor model Alhambra and also 7-3 and 7-30 where it shared the horn with an Orthophonic Victrola. Victor marketed a small consolette built by RCA with built in Orthophonic horn and no phonograph. This was called the R-20. These have a metal ring where each of the tubes stick out of the panel. Only the original 199s and 120 tube will physically fit. They are relatively easy to repair as the main failure is open audio transformers.
::FR
:
:
Thank you FR,

Most informative and correct in all of your explained knowledge about this radio, i am going to post a new thread on the radio now that i have it on the bench.

I hope that you follow the thread and will contribute, this is a beatiful radio that deserves to be played again.

Thank you,

Mitch