Re: K1 build question: T1, turn count method.

Posted by Don Wilhelm on May 29, 2020; 11:11pm
URL: http://elecraft.85.s1.nabble.com/K1-build-question-T1-turn-count-method-tp7661463p7661469.html

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 2 turns.  That is especially important for
the toroids in the LPF on the band board.

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 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 turn (versus adding one!).
>
> I just completed the front panel tests and so before heading into the VFO alignment, I’ll make the correction.
>
> For all the inductors (such as L9,L10 etc) I measure the inductance before installing them.
>
> Paul

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