Measuring the inductance is not a good approach unless you have a way of
measuring it at a specific frequency. The toroid material’s effect on the
inductance of the finished coil varies with frequency, and most LC meters use a
frequency below the HF range.
Victor 4X6GP
> On 30 May 2020, at
Paul,
As far as measuring the inductances, the listed values are only average.
Count the toroid turns correctly and there will be no problem.
73,
Don W3FPR
On 5/29/2020 5:16 PM, Paul Gacek via Elecraft wrote:
John
Fair question as to why not.
I guess it boils down to tolerance in the
Paul,
Yes, correct the turns count on T1 and T2 if necessary.
The impedance matching is important for full power output.
You are not the first to miscount the turns on a toroid (adding an extra
turn). Remember that a single wire through the core is one turn and a
full wrap around the core is
Thanks all for the feedback.
T1 correction is now made and now off to make a cup of tea (there’s a Brit in
me somewhere).
Paul Gacek
W6PNG/M0SNA
Www.nomadic.blog
> On May 29, 2020, at 1:51 PM, Fred Jensen wrote:
>
> You count "passages through the hole" as turns in all cases with toroid
John
Fair question as to why not.
I guess it boils down to tolerance in the design. As T1 and T2 are impedance
matches maybe my error isn’t going to push things out of tolerance.
That written, the consensus feed back is I have counted the turns wrong on T1
and it’s easy enough to reduce a
You count "passages through the hole" as turns in all cases with toroid
cores. A straight wire thru the donut is one turn. I can't answer your
question ["does it make a difference?"] because I don't have a K1, but I
did build a K2, and based on that, I think the answer is "Yes, it will
make
Why would you choose not correct a known error?
Correct it and rule it out as a possible culprit in the event you have a
problem with the radio. If you don't correct it, and end up having a
problem, you'll wonder
John AE5X
https://ae5x.blogspot.com
> Any guidance on whether I should correct
I have completed the RF board RX build portion and about to test it with the
filter board and front panel.
I realize I may have a discrepancy on turns for T1. I count a turn by tracing
the wire around the toroid and get 4 turns of green but the manual page 14
states I should count a turn each
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