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Old 16th Apr 2018, 5:36 pm   #1
derek.ireland
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Default Early TRF info needed please

picked up at a boot sale for £2. trf with set of mw and lw coils. seems to be the original philco valves. filaments all ok .wiring is in a bad state but no real problem.if anyone can help with info on this set would be appreciated . next question how can you feel sorry for a rusty old radio..thanks for any help
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Old 16th Apr 2018, 6:02 pm   #2
Reelman
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Default Re: Early TRF info needed please

What a bargain!
Well done on finding such a radio at a boot sale, at our local ones any radio is a rarity.
Sorry canít help with any details, it does look well made, I notice rivets rather than screws. Still, should not be hard to draw the circuit from examination.

Good luck, looks like fun!

Peter
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Old 16th Apr 2018, 8:45 pm   #3
Ed_Dinning
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Default Re: Early TRF info needed please

Hi Derek, have a look at typical circuits from the early 30's and you should be able to draw parallels. It looks like it uses an SG, possibly a triode detector and possibly a pentode OP.
It may have been a kit set supplied with a chassis.

Good buy, Ed
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Old 16th Apr 2018, 10:59 pm   #4
Herald1360
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Default Re: Early TRF info needed please

Is that an octal valve socket in the second pic? That would make the set mid '30s or later since octals didn't appear until 1935.

What are the valves?
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Old 17th Apr 2018, 8:58 am   #5
G0HFCFrank
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Default Re: Early TRF info needed please

"Is that an octal valve socket in the second pic? That would make the set mid '30s or later since octals didn't appear until 1935."

Isn't that socket holding a coil? and what are the valves?
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Old 17th Apr 2018, 9:52 am   #6
crackle
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Default Re: Early TRF info needed please

Is there a cabinet with the radio?

Mike
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Old 17th Apr 2018, 7:44 pm   #7
derek.ireland
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Default Re: Early TRF info needed please

no cabinet i am sorry to say ...coil holders are nearly the same as octal.spigot is the same size but pins are larger and wider spaced plus only 6 pins, perhaps this was the start of the octal ?? grid and heater sorted just ht to go
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Old 17th Apr 2018, 8:07 pm   #8
Ed_Dinning
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Default Re: Early TRF info needed please

Was that the Eddystone coil base?
Popular at that time and a good range of coils available.

Ed
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Old 17th Apr 2018, 9:55 pm   #9
Herald1360
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Default Re: Early TRF info needed please

Encore une fois..... What are the valves?
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Old 17th Apr 2018, 11:56 pm   #10
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Default Re: Early TRF info needed please

6K7G/CV1941? The coils may be BTS? I have one similar somewhere. The plug in coils in a metal chassis will narrow the choices down.
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