LED Series Christmas Lights

[spamtrap1888]

On Jan 5, 6:38 pm, "Michael A. Terrell" <mike.terr...@earthlink.net>
wrote:

William Sommerwerck wrote:

Not that they weren't stable. They were powered with unfilterd DC,
which caused a wideband output. They are operated as a self excited
oscllator when used in a microwave, and as long as the thing is in
band, the frequency or bandwitch doesn't really matter.

Wasn't that an Eagles song? "Bandwitchy Woman"?

Isn't the frequency determined by the dimensions of the cavity
the energy is dumped into? Or does that tune it too broadly?

If I understand your misunderstanding... "Wideband" refers to the "spuriae"
generated by the unfiltered 60 Hz and its harmonics.

   AKA 'Phase Noise'.

Ah.

Can you engineer a phase lock loop into a microwave oven?

 

[William Sommerwerck]

Can you engineer a phase lock loop into a microwave oven?

Why would you want to? Regardless, to implement a PLL, the oscillator's
frequency has to be adjustable.

 

[Michael A. Terrell]

spamtrap1888 wrote:

Can you engineer a phase lock loop into a microwave oven?

Why would you want to, when a YIG oscillator is better suited?


--
You can't have a sense of humor, if you have no sense.

 

[Windmill]

josephkk <joseph_barrett@sbcglobal.net> writes:

Since then, I hear that high power klystrons have been used as
amplifiers in radar systems, and I believe there's a still newer tube
type which is used in the latest gear.

I believe you are talking about a thing called a gyrotron. Useful at 100
GHz to 300 GHz in different models and uses.

Could be; the word seems vaguely familiar. But I'm surprised about the
frequencies. Had thought it was for much lower frequencies than that.
300 GHz sounds as though it's well on the way towards infra-red frequencies.

--
Windmill, TiltNot@Nonetel.com Use t m i l l
J.R.R. Tolkien:- @ O n e t e l . c o m
All that is gold does not glister / Not all who wander are lost