Bad Colpitts osc Waveform
 

"John Ferrell" wrote in message
...


I have recently subscribed to a service from the Agent Newsreader
folks at http://www.forteinc.com/agent/support.php
For $2.95 per month I get 7G of upload/download. Where your usage
stands is available all the time. They claim to cover the entire
Usenet. It works for me.

Yeah, and $3 a month here and $5 a month there for stuff that wildblue ought
to provide along with their $50 a month satellite service.




BTW, are you the RST Engineering that used to make the Aviation
Electronics in the 1970's?

And still do. www.rstengineering.com

Jim

Bad Colpitts osc Waveform
 

BTW, are you the RST Engineering that used to make the Aviation
Electronics in the 1970's?

And still do. www.rstengineering.com

Jim

Nice products. I still have a couple of your VOR testers that I mainly
used to verify my radios worked before departing the Bahamas on an
international IFR flight plan. After the plane had set a couple of
weeks it was nice to know the Navs were working before getting
airborne.

I probably ought to EBAY them. I have not used either for over 20
years and will have no use in the future!

John Ferrell W8CCW

Bad Colpitts osc Waveform
 

I duplicated a circuit for someone because they got a bad
output waveform.
As I shift up in freq at about 2.7Mhz the voltages jump.

If the voltages suddenly jump with frequency change then this is a sign of
instability. Not seen the circus digramus confusicus, but if it is a colpits
then reduce the gain by adjusting the ratio of the two divider capacitors. I
assume, of course, that you have adequately decoupled the supply line, and
that there is no inductive coupling/feedback.

Instability causes eratic frequency and/or severe distortion. In
particularly bad conditions it can cause unwanted visitors (CBers,
neighbours, DTI, etc.).