Probably a second chassis to a radio? Some were built with the tuner and audio section on different chassis. This would be from around 1929.
45 & CX345 are the same tube. CX345 is Cunningham and shaped like a light bulb. 45 is a later version. Check AES, tubesandmore.com for value of these tubes. They would be used in a push-pull audio circuit to drive a speaker. 80 - rectifier 26- 1st audio amp.
Norm
:I found an old brown audio device of some sort as I was going through rubbage in a building about to be demolished. Label says "Victor Talking Machine Division" Type 245. Made in USA. Contains tubes: 80, 45, 26, and CX345 which seem to be recitifer, two triodes, and a larger triode. Does not appear to be a radio - maybe an old audio amplifier? Must be old - unit was last serviced in 5/36. Chassis only - no speaker or anything else. Any ideas on what this is? Thanks.
Also, is the sound from this old unit that good? In other words, is it worth anything since it is missing the tuner parts and would basically be just an amplifier?
Thanks...
Dedrick
:Hi Dedrick
:
: Probably a second chassis to a radio? Some were built with the tuner and audio section on different chassis. This would be from around 1929.
:
: 45 & CX345 are the same tube. CX345 is Cunningham and shaped like a light bulb. 45 is a later version. Check AES, tubesandmore.com for value of these tubes. They would be used in a push-pull audio circuit to drive a speaker. 80 - rectifier 26- 1st audio amp.
:
:Norm
:
::I found an old brown audio device of some sort as I was going through rubbage in a building about to be demolished. Label says "Victor Talking Machine Division" Type 245. Made in USA. Contains tubes: 80, 45, 26, and CX345 which seem to be recitifer, two triodes, and a larger triode. Does not appear to be a radio - maybe an old audio amplifier? Must be old - unit was last serviced in 5/36. Chassis only - no speaker or anything else. Any ideas on what this is? Thanks.
You can get some idea by looking at the Philco 87 schematic. It uses the same audio & power supply tubes. This schematic can be found by clicking on "resources", Philco and the model. Might also try RCA Model R32, R52. This one does use a separate chassis for the amp.
Sound should be good as the circuit has push-pull triodes.
If you need tube specifications search on "duncan". You need a meter to measure voltages. Filaments will be AC. Other voltages DC. 45 tube has a 2.5 volt filament, large pins. 26 - 1.5 volts and 80 - 5 volts.
Norm
:Thanks for the info. I am also working on an ancient philco that has some of the same tubes. I think I can tell by looking what the pinout of the 4-tube base is, but how should I go about making my own tester circuit? I mean, what heater voltage and what plate voltage and how much plate current to expect given a reasonable plate voltage....?
:
:Also, is the sound from this old unit that good? In other words, is it worth anything since it is missing the tuner parts and would basically be just an amplifier?
:
:Thanks...
:Dedrick
::Hi Dedrick
::
:: Probably a second chassis to a radio? Some were built with the tuner and audio section on different chassis. This would be from around 1929.
::
:: 45 & CX345 are the same tube. CX345 is Cunningham and shaped like a light bulb. 45 is a later version. Check AES, tubesandmore.com for value of these tubes. They would be used in a push-pull audio circuit to drive a speaker. 80 - rectifier 26- 1st audio amp.
::
::Norm
::
:::I found an old brown audio device of some sort as I was going through rubbage in a building about to be demolished. Label says "Victor Talking Machine Division" Type 245. Made in USA. Contains tubes: 80, 45, 26, and CX345 which seem to be recitifer, two triodes, and a larger triode. Does not appear to be a radio - maybe an old audio amplifier? Must be old - unit was last serviced in 5/36. Chassis only - no speaker or anything else. Any ideas on what this is? Thanks.