11-25-2024, 08:15 PM
Hi everyone,
Special thanks to Joe Rossi for tracking down this obscure radio and thanks to others who took up the hunt as well.
I must apologise for sowing mis-information. I identified the rectifier in my initial entry as an OZ4. It is in fact an 84.
But thanks to Joe it can finally be identified as a Mission Bell Model 19 or 19A car radio.I checked the i.f. frequency - sure enough it was correct.
Some interesting points arise with this set.
First of all it has turned up here in N.Z.
Gilfillan radios sold well here in N.Z. I have been to a museum here in the South Island devoted to Gilfillan sets.
Secondly ,yes, very odd mix of filament voltages for the valves with both 6.3 and 2.5 volt valves..The 2.5 volt valves are in series ,the chain ending with a half ohm wirewound resistor to earth. I measured the voltage across the last 2.5 volt valve filament at 2.3 volts. The wunderlich valve is replaced by an 85 and the socket wafer is embossed 85 so the set may be a later example .I note that Gilfillan Bros address was in Venice Blvd in Los Angeles and Mission Bell seems to have had their factory , or at least their address very close by which lends weight to the idea that Gilfillans rented out parts of their factory, although of course I have not been to this particular street or indeed to Los Angeles..
As found the set had had a rough time! Sundry wires hung off in all directions and there was no tuning head. The chassis had been butchered around the tuning condenser and the aerial coil was not connected to anything ,but the aerial coil can did have two wires emerging from it,one just the right length to reach the tuning condenser whose tuning gang was not otherwise connected to anything except the grid clip for the first valve So this lead proved to be the correct one, the other being the aerial lead.The capacitor from the plate of the first audio to the grid of the 41 was predictably leaky and once replaced helped sort the distortion and the set ,if it can be called that now goes ,albeit using my bench h.t. supply and bench 6 volt supply.
And it goes surprisingly well. Apart from connecting the wires to the aerial and tuning capacitor and figuring out what to connect to where no other work was required to get it to go.
So the next task is to explore the vibrator and rectifier side of things. The vibrator is not a plug in one so something new here for me.
But thanks again to those who helped track down the identity of what seems to be a rare radio.
All the best everyone.
Special thanks to Joe Rossi for tracking down this obscure radio and thanks to others who took up the hunt as well.
I must apologise for sowing mis-information. I identified the rectifier in my initial entry as an OZ4. It is in fact an 84.
But thanks to Joe it can finally be identified as a Mission Bell Model 19 or 19A car radio.I checked the i.f. frequency - sure enough it was correct.
Some interesting points arise with this set.
First of all it has turned up here in N.Z.
Gilfillan radios sold well here in N.Z. I have been to a museum here in the South Island devoted to Gilfillan sets.
Secondly ,yes, very odd mix of filament voltages for the valves with both 6.3 and 2.5 volt valves..The 2.5 volt valves are in series ,the chain ending with a half ohm wirewound resistor to earth. I measured the voltage across the last 2.5 volt valve filament at 2.3 volts. The wunderlich valve is replaced by an 85 and the socket wafer is embossed 85 so the set may be a later example .I note that Gilfillan Bros address was in Venice Blvd in Los Angeles and Mission Bell seems to have had their factory , or at least their address very close by which lends weight to the idea that Gilfillans rented out parts of their factory, although of course I have not been to this particular street or indeed to Los Angeles..
As found the set had had a rough time! Sundry wires hung off in all directions and there was no tuning head. The chassis had been butchered around the tuning condenser and the aerial coil was not connected to anything ,but the aerial coil can did have two wires emerging from it,one just the right length to reach the tuning condenser whose tuning gang was not otherwise connected to anything except the grid clip for the first valve So this lead proved to be the correct one, the other being the aerial lead.The capacitor from the plate of the first audio to the grid of the 41 was predictably leaky and once replaced helped sort the distortion and the set ,if it can be called that now goes ,albeit using my bench h.t. supply and bench 6 volt supply.
And it goes surprisingly well. Apart from connecting the wires to the aerial and tuning capacitor and figuring out what to connect to where no other work was required to get it to go.
So the next task is to explore the vibrator and rectifier side of things. The vibrator is not a plug in one so something new here for me.
But thanks again to those who helped track down the identity of what seems to be a rare radio.
All the best everyone.