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Re: Magnifier Help
Hi Dwight,
What I'd do: first check all connections in the
secondary system thoroughly. I once obtained perfect scope tune with
a non-connection to the terminal at signal generator induced voltages
and the thing immediately went out of tune the moment I put some real
power into the circuit and an arc completed the terminal connection :(
Then, measure the principal resonant frequency of the entire
secondary system without the primary circuit being complete to get an
idea of primary tune.
Finally, do a sig gen and scope check of primary to be sure
you've got tune with the secondary with out the secondary being
present. That should get something happening.
Malcolm
> Original Poster: dwight duncan <duncand-at-ccsalpha2.nrl.navy.mil>
>
>
> Hi All,
>
> My latest magnifier still is not working. The one I built before this
> worked great and even posted some on the list. The new magnifier is
> powered by a 14.4 KV, 5KVA pig. That is the first change. The second is
> that I went to a equa-drive system. I tried changing this back to just one
> cap, and still no out put. The third change is all of the primary
> connections are copper tubing and copper plates. The fourth change is the
> secondary of the RF transformer is made of a 22"dia. polyethylene 55 gal.
> drum of which I wound 1000 ft of wire. The fifth change is the coupling is
> tighter. The sixth change is I added a second stationary gap to my rotory.
> Seventh change is that in series with the rotory I put an eight point
> blown quench gap. The last change is I put a three post ground outside
> connected together with copper pipe and ran it inside. The system seems to
> quench out in one sine cycle, but occasionally I see an under damped wave,
> and it occures appx. 1 every 10 sec. or so.
> I have changed every thing back to what it was, and tired different
> configurations but still no output from resonator. Yes it is connected to
> the RF x-former.
> One conundrum though, I calculate the inductance needed to mach the
> resonator's frequency(200KHz) and start there with the tap with the help of
> my inductance meter. I start there and move all around the primary.
> Frankly I am "tapped out" and also tiered. My scope can do FFT's and I
> see a split in frequency; one at 180 KHz and one at 375 KHz.
> The primary is about one third up on the secondary and about 5" from
> the secondary all the way around.
>
> Please help. I am running out of idea's. My capacitance has gone to
> the following: .08, .05, .04 and .01 microfaradads.
>
> Thank you,
>
> Dwight
>
>
>