05-22-2007, 07:57 AM
Based on inputs from this and another forum, I tested the type 14's and the type 17 at 24 and 27 settings but with 12.6 volts on the filament. The 14's (fortunately) test good even at 12.6 volts. The 17 tests weak. I may try to craft an adapter for my tube tester that will allow an external filament supply set to 14 volts. But the 17 will probably work (used as 1st audio amplifier/driver in the radio).
One 14 tube was missing in my set and a type 36 was substituted. That would probably work, since the filament current is correct (300ma) - I would just have to reduce the input voltage by 8 volts or so. But I was able to find a NOS type 14 from George Fathauer, so I purchased it. I'll keep the 36 as a spare if a 14 decides to die in the future. I doubt there are many of these tubes around, since they were only used in the Philco 46 and 46E Export model.
The DC power supply will be a problem. Since my 46 is an EXPORT set, it needs 240 volts DC at about 350ma! And it must be fairly clean, since it is the plate voltage for the set.
I also like to collect DC sets. I have a British Ultra Blue Fox "DC Mains" set that needs 240 VDC. I also have an AK 84D (110 VDC version of the AK84), and many 1.5 volt, 2 volt, 6 volt, and 32 volt DC sets (including the rare Philco model 32).
Dave
One 14 tube was missing in my set and a type 36 was substituted. That would probably work, since the filament current is correct (300ma) - I would just have to reduce the input voltage by 8 volts or so. But I was able to find a NOS type 14 from George Fathauer, so I purchased it. I'll keep the 36 as a spare if a 14 decides to die in the future. I doubt there are many of these tubes around, since they were only used in the Philco 46 and 46E Export model.
The DC power supply will be a problem. Since my 46 is an EXPORT set, it needs 240 volts DC at about 350ma! And it must be fairly clean, since it is the plate voltage for the set.
I also like to collect DC sets. I have a British Ultra Blue Fox "DC Mains" set that needs 240 VDC. I also have an AK 84D (110 VDC version of the AK84), and many 1.5 volt, 2 volt, 6 volt, and 32 volt DC sets (including the rare Philco model 32).
Dave
