I am a little confused. If you are aware the output is RF then why would you want to call it something else?
So, CITFTA...
Did I? I implied that a spark gap generates HV RF power in a lot of frequencies. I know this. The frequencies, I read awhile ago, could range from 1Hz to, even, 500 billion HZ. That's greater coverage than about all the broadcast/receive bands in public use, IMO. And, I've read, powerful local spark gaps can create a headache for production personnel at TV and radio transmitter broadcasting sites.
If asked, I might see if there's Internet references to prove this.
I also don't understand what you mean about the primary being shorted. Where is it shorted?
Well, I just looked at the drawing I uploaded again.
As you can see, the capacitor is a fixed, polarized electrolytic, and one side---the upper---of the primary coil of the Tesla coil is connected to the capacitor's anode. The other is connected to the bottom of the spark gap. That would make both ends shorted by the actual coil, right?
Wait. You're looking at the coil backwards compared to the way I'm looking at? The primary input to the tesla coil is from the transistor/spark gap, and from there is to the Tesla coil, right? You're thinking
the coil doesn't necessarily short circuit the spark gap and capacitor? See the next paragraph:
Even if the spark gap is open (that's obvious) the bottom is connected to the primary coil. And that was my point.
My final point was that the bottom of the spark gap and the bottom of the primary coil could have a capacitor between them and that would make the power 'cold', with two(2) capacitors connected to the primary coil.
I don't know whether anyone understands the foregoing descriptions or not. A complete drawing would probably be more instructional, but finding time to take out from other things I work on can be problematic to me, sometimes.
All that's left that I can think of, is that will a coil affect the output characteristics of the 2 capacitors going to the oscillator? How about an inductor with an iron core? I've never known of anyone trying that arrangement.
--Lee