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I'm looking at this page in the files section,

John KN5L, So far it looks like you are the only one to have actually run with the ball. Do have any thoughts about actually building this in an instrument? As always once you get to 1MHz and up

You might find Jeri Ellsworth's work interesting : https://www.youtube.com/playlist?list=PL5DCEA197C1C07A2D wrote:

I love this kind of "kitchen table science" and teaching it to youngsters. Would there be any possibility of getting her science fair report? Steve Hendrix

Added to: https://www.kn5l.net/Q-Meter/MM-T80-2-36T/ is section "Prototype Q-Meter Analysis" which evaluates difference between VNWA S11, Prototype Q-Meter, and shape of Q-Curve using Rs and Rp

Hi Mikek: Thanks very much. -- Have Fun, Brooke Clarke https://www.PRC68.com axioms: 1. The extent to which you can fix or improve something will be limited by how well you understand how it works. 2.

After taxing my old eyeballs counting and coming up with about 26 wire in each bundle of 5 times, then not getting the math to work out to 660. I see he gave you the formula.

Hi Mikek: I asked the eBay seller to clarify his claim of Type 2 Litz with his designation of 660/46 which is a single bundle (Type 1) of 46 AWG wires.? But his answer was to copy and paste something

Aargh! (Forehead slap!) Of course you are right. I did not look closely enough at the output load. Thanks for the correction, Alan. Cheers Tom Sent from my iThing; please forgive the typos and brevity

I would think that is why my 5 coil test does not show that a 15 TPI coil would have the highest Q and it shows Q starts to drop at 12TPI, at least with coils wound with 660/46 on a 6" form. That's

The 100MΩ? as you say adds a very small reduction in Q, but the tube also adds losses especially at high frequencies as shown in this graph from the 260A manual. Note: the input impedance is down to

*Bootstrapping* The V301 valve in the Boonton Q meter is NOT a cathode follower but an " infinite impedance detector" due to the capacitor C302. So you cannot bootstrap at AC. It would be possible to

Hi Mikek: Thanks.? I've made a table of those Litz wire sizes and put all the combinations with the same bundle diameter in the same column (+/- for odd bundle AWG numbers).

Correct, As wire spacing decreases, there is skin effect squeezing, which will increase RF resistance. Looked at wire chart, #46 is skin saturated in this frequency range. Therefore wire Q is a

I'm sure you meant will increase RF resistance Litz wire increases Q because it has much more surface area than a single wire of the same diameter. Its frequency is limited though and if you look thru

Hi Mikek, Added to Q as a function of tpi graph is 15tpi. As wire spacing decreases, there is skin effect squeezing, which will reduce RF resistance. Not sure how this relates to Litz wire, as there

Sellers name is mkmak222. He also has rods and toroids of the low loss R40C1 ferrite material. https://tinyurl.com/2p88yxfk or https://www.ebay.com/str/mkmak222litzwire?_trksid=p2047675.m3561.l2563

Hi Mikek: Do you have a link to "The Litz man's page"? I think 2.46? comes from taking the differential of a simple equation for the inductance of a single layer cylindrical coil. -- Have Fun, Brooke

The wire I used 660/46 litz wire, it is 0.065" in diameter, meaning 8 TPI with be very close to 1 wire spacing. Close wire spacing is just over 15 TPI. EBAY Litz supplier, https://tinyurl.com/mr2aw5zm

Hi: Self capacity is a very important factor.? Hence the experiments related to TPI.? But for me it's hard to make sense of TPI.? So mentioning the physical wire diameter, or the equivalent the