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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 15th May 2019, 9:57 pm   #21
trabant
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Default Re: Mystery 1930s Philco name that Resistor ??

The loudspeaker appears to be original and permanent magnet I shall fit a 400 and see how we go when it's new electrolytics arrive
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Old 15th May 2019, 10:03 pm   #22
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Default Re: Mystery 1930s Philco name that Resistor ??

U647 diagram uses a 304 barreter, no resistors connected to it, why would there be? I'ts on the AC part, filaments ballast.

However there is a 400 ohm resistor in the tone network, R23.

Not suggesting that this is the set, we have not even got a picture of the radio but Philco made lots of sets witH 304 barretters and many parts of the circuit will be common.
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Old 17th May 2019, 8:04 pm   #23
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Default Re: Mystery 1930s Philco name that Resistor ??

To whoever asked if I'd got the model number correct yes I have and no I can't find any reference to it either the chassis seems to be loosely based on the v537
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Old 17th May 2019, 9:02 pm   #24
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Default Re: Mystery 1930s Philco name that Resistor ??

Just thinking out aloud but this must be a rare old set if no-one can find anything on it on the net and no-one's popped up with 'I've got one of those'.

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Old 18th May 2019, 7:24 am   #25
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Default Re: Mystery 1930s Philco name that Resistor ??

It is certainly worth recording the details in the radio museum..
If you send them to me I will setup a new model page.
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Old 18th May 2019, 8:24 am   #26
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Default Re: Mystery 1930s Philco name that Resistor ??

Just found the IF frequency for this set on Radiomuseum.Listed as 465khz.
http://www.radiomuseum.co.uk/pif.html
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Old 18th May 2019, 8:29 am   #27
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Default Re: Mystery 1930s Philco name that Resistor ??

Which is in itself quite uncommon for Philco and also quite "British".

Has the OP revealed what the complete valve lineup is yet?
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Old 18th May 2019, 8:39 am   #28
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Default Re: Mystery 1930s Philco name that Resistor ??

Looking at the label on back of set,line-up is:
6A7 78E 75 18E 25RE & 301 or 302 Barretter.
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Old 18th May 2019, 9:08 am   #29
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Default Re: Mystery 1930s Philco name that Resistor ??

Quote:
Originally Posted by trabant View Post
Right well after cleaning it would appear to be yellow body black tip brown band which I make 400 ohm . The resistor is connected at one end to the fuse on the chassis and via another resistor to the barretter.
Of course it is, check post #6 and #11
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Old 18th May 2019, 11:23 am   #30
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Default Re: Mystery 1930s Philco name that Resistor ??

We've got beyond that stage. The OP is now trying to figure out why the recapped set doesn't work:-

https://www.vintage-radio.net/forum/...d.php?t=156594
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