Hi all, I got this one off of e-bay, it is a AC/DC wooden table radio, no mfg name no numbers, nada, zilch. it is a AM only with on/off volume and 4 push buttons you can preset to move the tuner the tuning knob is on the side of the cabinet it has a big black cover on the antenna which is mounted to back of chassis, the tube lineup is as follows 6A7,6D6, 75, 25L6, 25Z5, and the real stumper a L49B ???? what the heck is a L49B tube? is it some kind of regulator?
any help in ID'ing this one would be appreciated.
Thanks
Elton

That oddball tube is a ballast resistor tube. If you add up all the tube voltages you will find that it only adds up to 68 volts. I am assuming that the 49 designation is 49 volts which when added to the 68 gives you 117 volts (line voltage).
MRO

Thanks Mark , I kinda figured that what the tube was as the line cord is soldered to the base of this tube
now to find a schematic for this relic.
Thanks
E.
:That oddball tube is a ballast resistor tube. If you add up all the tube voltages you will find that it only adds up to 68 volts. I am assuming that the 49 designation is 49 volts which when added to the 68 gives you 117 volts (line voltage).
:MRO

Hi Elton, Having the tube lineup is a good start to finding a schematic. The lineup is typical of the mid 1930's. However it will be a long hard search without knowing the manufacturer. If you can post a picture someone might recognized the styling to a particular mfg. Once got confused with radio that had a Sentintel dial but was a kludge with a Warwick chassis. Sticker on the back of the chassis was label W.R. Co which was the breakthrough to solve the mystery.

Richard

Hey Richard, thanks for the reply, I will have to post a picture of it ,thats if my daughter did not take my digital camera again ,but in the meantime I did find stamped in very small letters on the top of the cabinet CRT-8? or S?, and the number 569 I know is not much info but is all I found anywhere on it, besides the patent info and all that says is pantented under the hazeltine corp, which tells me nothing as I believe a bunch of manufactures licened under hazeltine in the early years.
:Hi Elton, Having the tube lineup is a good start to finding a schematic. The lineup is typical of the mid 1930's. However it will be a long hard search without knowing the manufacturer. If you can post a picture someone might recognized the styling to a particular mfg. Once got confused with radio that had a Sentintel dial but was a kludge with a Warwick chassis. Sticker on the back of the chassis was label W.R. Co which was the breakthrough to solve the mystery.
:
:Richard

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WHASS-A- MATTER…..did the previous owner polish that ole' cabinet so much that the water clear decal came off ? I'll make a WAG at an Air King.
Yes, the L49B is a filament string series ballast tube one resistive element running straight thru it and the other is center tapped and has the pilot “bubs” shunting them.
Hope that sucker is still good !
You didn’t mention the band(s) coverage of the unit , but check thru the model 822-822x-826x-and 832….or even the 910 at this sites Air King schema bank and see if one might agree with your unit.

73’s de Edd

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:Hey Richard, thanks for the reply, I will have to post a picture of it ,thats if my daughter did not take my digital camera again ,but in the meantime I did find stamped in very small letters on the top of the cabinet CRT-8? or S?, and the number 569 I know is not much info but is all I found anywhere on it, besides the patent info and all that says is pantented under the hazeltine corp, which tells me nothing as I believe a bunch of manufactures licened under hazeltine in the early years.
::Hi Elton, Having the tube lineup is a good start to finding a schematic. The lineup is typical of the mid 1930's. However it will be a long hard search without knowing the manufacturer. If you can post a picture someone might recognized the styling to a particular mfg. Once got confused with radio that had a Sentintel dial but was a kludge with a Warwick chassis. Sticker on the back of the chassis was label W.R. Co which was the breakthrough to solve the mystery.
::
::Richard

:~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks Edd, yes it is a close match a least the tube line up matches , the radio is only AM the schematics you refer to have SW also but they are a good start to guide me, Yes I hope the ballast is good also , have not checked it yet with my VOM, but I have heard of bad ones being replaces by resistors in a pinch.
E.
:WHASS-A- MATTER…..did the previous owner polish that ole' cabinet so much that the water clear decal came off ? I'll make a WAG at an Air King.
:Yes, the L49B is a filament string series ballast tube one resistive element running straight thru it and the other is center tapped and has the pilot “bubs” shunting them.
:Hope that sucker is still good !
:You didn’t mention the band(s) coverage of the unit , but check thru the model 822-822x-826x-and 832….or even the 910 at this sites Air King schema bank and see if one might agree with your unit.
:
:73’s de Edd
:
:~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::Hey Richard, thanks for the reply, I will have to post a picture of it ,thats if my daughter did not take my digital camera again ,but in the meantime I did find stamped in very small letters on the top of the cabinet CRT-8? or S?, and the number 569 I know is not much info but is all I found anywhere on it, besides the patent info and all that says is pantented under the hazeltine corp, which tells me nothing as I believe a bunch of manufactures licened under hazeltine in the early years.
:::Hi Elton, Having the tube lineup is a good start to finding a schematic. The lineup is typical of the mid 1930's. However it will be a long hard search without knowing the manufacturer. If you can post a picture someone might recognized the styling to a particular mfg. Once got confused with radio that had a Sentintel dial but was a kludge with a Warwick chassis. Sticker on the back of the chassis was label W.R. Co which was the breakthrough to solve the mystery.
:::
:::Richard