J
Jan Panteltje
Guest
On a sunny day (Sun, 4 Jan 2015 11:18:23 -0800 (PST)) it happened
meow2222@care2.com wrote in
<e1e8c673-e5cf-4c49-a333-689164319e27@googlegroups.com>:
Not exactly.
A square wave has mainly odd harmonics
For 50 Hz switching the more harmonics fit in the bandwidth,
the more noise in that band.
Adding diodes creates more 50 Hz harmonics.
Just connecting a voltage and then disconnecting and letting the the LC run a damped oscillation
is just a dying tone at one frequency really.
meow2222@care2.com wrote in
<e1e8c673-e5cf-4c49-a333-689164319e27@googlegroups.com>:
On Sunday, January 4, 2015 6:35:12 PM UTC, Jan Panteltje wrote:
On a sunny day (Sun, 4 Jan 2015 08:54:09 -0800 (PST)) it happened
meow2222@care2.com wrote in
716acfee-62e1-44a8-8e15-de9f40e4348e@googlegroups.com>:
On Sunday, January 4, 2015 12:01:22 PM UTC, Jan Panteltje wrote:
On a sunny day (Sun, 4 Jan 2015 03:35:27 -0800 (PST)) it happened
meow2222@care2.com wrote in
9e55e606-0e6c-4885-b13d-0d9147c4e282@googlegroups.com>:
On Sunday, January 4, 2015 2:56:44 AM UTC, Robert Baer wrote:
cjensen@netplus.com wrote:
Can anyone please have a look at this circuit and tell me what it is
doing, or supposed to do?
Better yet if you can decipher the parts in Russian.
https://app.box.com/s/hin6mhzpzl147473r1td
It is supposed to be some kind of "secret" device from the 1950's.
Maybe some kind of radio tracking gadget. Would be interesting to
calculate the frequency used.
Claus Jensen
Do not know Russian at all,but here is my take:
At the top, 220V 50Hz.
R1: 1-2 ohms, R2: 5K appx at 2Watts.
C1: 0.25-0.50uF metal film 400V
C2: 2000-6000pF NPO
C3: 200-500pF NPO
D1,D2: unknown
M: ?frequency meter? 80?? at 220? (or part number 80C-220
Tp: tuned transformer secondary
The rest is unknown.
Wild guess is the diodes are to generate harmonics, and one tunes the
transformer secondary; purpose is a cheap high power jamming xmitter.
I dont see the point of the diodes at all, given the characteristics of the glowstarter
The non-linearity of diodes is often used to generate higher harmonics,
surely they'd have a tiny effect compared to the glowstarter
I think the glowstarter ? is merely a switch.
its a neon, switch and small capacitor in parallel.
Most liekly the circuit eats much less than 20w, thus the starter will act as ne & c in paarallel, the switch staying open
It probably arcs a bit and creates some harmonics,
but not like a true spark gap in a horn.
The ne will switch on at 90v and off each half cycle
To activate that tuned circuit you need spectral components IN its frequency range.
all you need is a squarish edge.
Not exactly.
A square wave has mainly odd harmonics
For 50 Hz switching the more harmonics fit in the bandwidth,
the more noise in that band.
Adding diodes creates more 50 Hz harmonics.
Just connecting a voltage and then disconnecting and letting the the LC run a damped oscillation
is just a dying tone at one frequency really.