开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

Re: U3S No Power Troubleshooting


 

?KI7MWA

This may help you troubleshoot

To measure? "rf"? I use this circuit and a common dc Volt meter (DVM)

At 10 mHz and 5 Volts and one BS170
Measure at output of C5 with filter removed

?? IF????? R5 is set to measure much over 1.5 V rms at C5 with filter removed?
THEN? one BS170 goes from warm to hot

P = (E^2) / R
(1.5 X 1.5) / 50? =? 0.045 W?? (45 mW)

72 73
John
N3AAZ

Join [email protected] to automatically receive all group messages.