There appear to be one or more measurement errors here. ? The bulk of the measurement suggest that the transistor is indeed within its linear range despite the unexplained base emitter voltage. ?So I strongly suspect some measurement errors or a faulty measurement device.
If there still is DC voltage present on the other side of the one micro F capacitor ?then the capacitor is defective. But again, I suspect measurement error is what’s really going on and if this were me, I would just very very carefully reconfirm every device and every measurement before I try to figure much more out.
It’s very strange to have a base emitter voltage anything greater than 0.6. ?And the collector measure measurements demonstrate the device is not saturated. ?
So I suspect the reason this makes ?no sense is that something isn’t correct. ? Voltmeter lugging circuits down or reading incorrectly, some form of RF input to the voltmeter who knows.
Waiting to hear more clues.
Gordon kx4z?
toggle quoted message
Show quoted text
On Mar 9, 2025, at 17:33, WF4RC Carroll via groups.io <WF4RC@...> wrote:
?
the mystery continues.?
removed :
CD28
LD6
CD29
CD27
QD1
?
Still have 2.1v at junction of LD6 / CD29 [both removed].? With power off measuring about 2K to ground at that point. Going to tke a break and start over tomorrow... Welcome any thoughts.
?
?
