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  Science Comic Series For Creative Children Published from Singapore         


Author: The Young Scientists
Date: May 1, 2008 22:58

Read and Buy Online at http://www.theyoungscientists.in
no comments
  Help needed with a Pye P35 valve radio         


Author: eu.thundernews.com
Date: May 1, 2008 13:45

Hi, I am planning to restore the above as I can get hold of the components.
The radio receives lw/mw and 6 sw bands.

It was working ok and then the volume suddenly dropped to about half that it
should be, the potts have been cleaned and are not noisy.

The radio picks up all the channels it did previously but it is quiet and
turning the volume pott up or down does pretty much nothing.

Could anyone point me in the general direction of which component/s to look
for as the culprit/s?

Any help would be massively appreciated.

I will post the schematic on alt.binaries.schematics.electronic entitled
'Pye P35 Schematic'

Thanks for any help guys.
6 Comments
  12V to 72V invertor for battery charging         


Author: N_Cook
Date: May 1, 2008 12:14

Scenario 12V,20A wind generator to charge a bank of 6x 12V batteries to run
a 72V motor.
What would happen if you ran a 12V to 110V sine or quasi-sine invertor ,
through a high power rectifier to the bank of 72V batteries ?
What other considerations , protections etc , should it work ?
6 Comments