toroid winding concerns

[Kirk Brown-2]

All,

Last night I started winding toroids for K2 #5670. This amounts to my
first-ever attempts at winding toroids of any kind so I was a bit
apprehensive. So far it hasn't been bad at all. I do however have two
clarification questions for the group that I was not able to get a
warm fuzzy for by reading past posts to the list.

1. T5: I wound the 3-4 winding after the 8th turn of the 1-2 winding.
The pic on the elecraft site (vs. the incorrect pic in the manual) has
the 1-2 winding offset and wound after the 6th turn. Should I rewind
T5 or will my choice of where to start have little or no effect as
long as the number of turns and sense of the winding match?

2. RFC11: I wound this choke so that the leads match up with the holes
on the board. By doing so the windings only take up about 70% of the
core vs. the accepted 80-90%. Should I rewind?

Thanks!

Kirk-KD6TVH

--
"Do the right thing. It will gratify some people and astonish the
rest." ~Mark Twain
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[Don Wilhelm-3]

Kirk,

The T5 3-4 winding is not critical in placement, so you are OK electrically.
Physically may be another story - but if the wires reach the holes without
undue distortion all is well.

RFC11 is an RF Choke, so its exact inductance is not so critical that
spreading the turns only over 70% of the core will make a difference.  If
the toroid is labeled "L-", it is used as an inductor and you will have to
spread the turns as indicated (85%)to obtain the correct inductance.

73,
Don W3FPR

> -----Original Message-----
>
> Last night I started winding toroids for K2 #5670. This amounts to my
> first-ever attempts at winding toroids of any kind so I was a bit
> apprehensive. So far it hasn't been bad at all. I do however have two
> clarification questions for the group that I was not able to get a
> warm fuzzy for by reading past posts to the list.
>
> 1. T5: I wound the 3-4 winding after the 8th turn of the 1-2 winding.
> The pic on the elecraft site (vs. the incorrect pic in the manual) has
> the 1-2 winding offset and wound after the 6th turn. Should I rewind
> T5 or will my choice of where to start have little or no effect as
> long as the number of turns and sense of the winding match?
>
> 2. RFC11: I wound this choke so that the leads match up with the holes
> on the board. By doing so the windings only take up about 70% of the
> core vs. the accepted 80-90%. Should I rewind?
>
>

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