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Old 06-25-2013, 04:04 PM
DavGoodlin's Avatar
DavGoodlin DavGoodlin is offline
Motorola Minion
 
Join Date: Aug 2011
Location: near Strasburg PA
Posts: 3,504
I had a single ended transformer that measures 260 ohms on the primary. I disconnected one lead of the present transformer from the 41 plate and connected this transformer to B+ and plate, then speaker. Being that this is single-ended and half the power, the volume is about the same. Replacement transformer is in the mail, some improvement needed.

Thanks for the suggestion on modifiying push-pull sounds interesting and may be the only option to improve over original.
I was also considering an interstage transformer with a center-tapped secondary, allowing the bias voltage, -12 volts to go on the tap. This is what was done using type 42 tubes for 118X and 501X models but needs an extra tube to drive the interstage primary. A tube and a transformer is extra $$$$ that may not be expected on a cheaper set.

Obviously, the radios equipped with PP 41s were economy models compared to the ones using the PP 42s.
This model does receive BC and SW very well with a 50-foot antenna outside, its the audio quality that needs help.
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Last edited by DavGoodlin; 06-25-2013 at 04:15 PM.
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