Re: SCR driver coil concept-another thought

To: tesla-at-pupman-dot-com
Subject: Re: SCR driver coil concept-another thought
From: "becyn comunication" <becyn-at-hotmail-dot-com> (by way of Terry Fritz <twf-at-verinet-dot-com>)
Date: Wed, 03 Feb 1999 05:09:22 -0700
Approved: twf-at-verinet-dot-com




>Date: Sun, 31 Jan 1999 20:58:53 -0700
>To: tesla-at-pupman-dot-com
>Subject: Re: SCR driver coil concept
>From: Tesla List <tesla-at-pupman-dot-com>
>
>Original Poster: Eddie Burwell <eburwell-at-HIWAAY-dot-net> 
>
>At 07:36 PM 1/30/99 -0700, you wrote:
>>Original Poster: "becyn comunication" <becyn-at-hotmail-dot-com> 
>>
>>To Eddie B, et all:
>> major edit<<<  
>given input there will be a turns ratio for an optimal match.
> I've messed with some pulse transformers to the point of frustration, 

What kind of messing?? Did you measure the base resistance at Fo?


>now I'm think of a different scheme. My current thought is to have an
>intermediate matching circuit between the primary tank circuit and the
>output resonator. Here is a diagram: 
>
>
>_____/ ____L2_________L3______
>   |    |       |          |
>   C1   L1      C2         Ctop
>   |    |       |          |
>  ----------------------------
>      |
>    -----
>     ---
>      -
>
>where L1,C1 is the very low inductace high capacitance, high current 
tank.
>L2,C2 is a series tuned matching circuit with L3>L2>L1 and C1>C2>Ctop. 
The
>tuning and interactions in this circuit could get ugly but the pulse
>transformers got ugly so here I am!

AAArgh! You think you were frustrated before? That L section match
isn't the best thing even for radio circuits (harmonics, etc), let
alone the mess that you'll get with a TC!

I tried something similar with a VFO transmitter that had a pi 
network output scheme. Very flakey performance due to the basic
incompatiblity of circuitry. I designed another one with a "link"
match with much better results. At resonance the link becomes part
of the L3, Ctop resonant system. No capacitor in series with ground
to muck things up. Another posibility is an "oudian" type system
with a tap to match L3.
        
 Jim McVey
>
>
>
>
>
>>   I have empirical results that proves otherwise! There are those
>>very respected members of this list that will say "forget radio 
>>engineering principles" when dealing with Tesla circuits, but in this 
>>case the concept of matching comes in handy. To offer an Olive branch, 
>>lest I get flamed to toast-I will add that it's not a completely 
>>conventional match where critical coupling would be considered at the 
>>driver coil. Ironically the SYSTEM k falls into
>>conventional range parameters.
>>
>>Jim McVey