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 Post subject: Re: Philco 34?
PostPosted: May Wed 15, 2019 2:06 pm 
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Joined: Sep Fri 07, 2007 2:27 am
Posts: 6377
Location: Grand Chute, Wisconsin
Took a few tries, but we nailed it!

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 Post subject: Re: Philco 34?
PostPosted: May Wed 15, 2019 3:26 pm 
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Joined: Apr Sun 01, 2012 9:55 pm
Posts: 11109
Location: Seattle, WA
The entry for this model at RadioMuseum has no photo, but it does explain the difference between the 34 chassis and the 34A chassis. https://www.radiomuseum.org/r/philco_34b_2.html

The basic 34 chassis was set up for use with a wet ("storage") A-cell battery. This was like a car battery, lead acid chemistry, but used only one cell (a modern 12V car battery uses 6 cells strung together to make 12V). A single cell generates 2 volts, the tube filaments run on 2 volts, everybody's happy. There is a spot on the chassis for a ballast, but no ballast was provided, and instead a jumper was used to bypass the ballast socket.

The 34A was set up for use with a dry A-cell battery. This was like a lantern battery, zinc carbon chemistry. A single cell generates 1.5 volts, not quite enough to make the 2 volts tubes happy, so the dry A batteries used 2 cells and generated 3 volts. With a 2V radio, you needed to get rid of a volt somewhere. Philco provided the 1C1 ballast with your radio instead of the jumper; it would use up a volt by converting the energy to heat. It wasted 1/3rd of the energy stored in the battery, but the radio worked.

You could convert the chassis at home between 34 and 34A configuration simply by swapping in a jumper or a ballast, and changing the battery type.

-Rodney

PS. You can still buy 2V lead acid batteries that would make this radio happy. Need a charger too.
https://www.amazon.com/Cyclon-Enersys-H ... 0002ZR6N2/


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 Post subject: Re: Philco 34?
PostPosted: May Fri 17, 2019 9:23 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 11923
Location: Mountains of Mourne. Ireland.
JnTx wrote: The 32B, 97E and 144B have the same cabinet:

Philco 32B has its control knobs on the vertical strings (pinstripes)... :)
https://mcclellans.com/images/Philco32B ... /front.jpg

Greg.


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