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  #1  
Old 19th December 2023, 06:12 PM
Princo Princo is offline
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Default wad 300b pse operating voltges/currents

Could someone provide a schematic with the relevant (actual) operating voltages/currents and test points, in particular the 300b's.
ie anode voltage, cathode bias voltage, anode current etc.

Also the DC resistance of the output tx primary.

thanks
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Old 20th December 2023, 06:30 PM
John Caswell John Caswell is offline
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Default Re: wad 300b pse operating voltges/currents

If you ask Greg very nicely via PM, he should be able to send you all the info on the 300B.
Output tx DC resistance is approx. 27R and impedance wrt 8R secondary load is approx. 1K5. Current through primary is approx. 160mA

John
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  #3  
Old 20th December 2023, 08:55 PM
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Greg. Greg. is offline
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Default Re: wad 300b pse operating voltges/currents

I’ve already forwarded the build instructions to Princo. No voltage check list was published. Only reference is the voltages as specified on the circuit diagram.
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Old 21st December 2023, 12:18 PM
Richard Richard is offline
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Default Re: wad 300b pse operating voltges/currents

The test points are flagged on my circuit as A B C D E and I'd add the 40V readings at the 300B cathodes and -35V at their grids
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  #5  
Old 22nd December 2023, 01:38 PM
Princo Princo is offline
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Default Re: wad 300b pse operating voltges/currents

thanks all
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