I made a mistake on my T1 and it's likely easier to rewind using new wire as otherwise it may be short... instead of the 0.33mm wire can I use 0.3mm wire without detrimental effect? Secondly, will I need to calculate a different number of windings than the 30, 4, 4, 4 for 30m for the default 0.33mm wire?

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You can use your .3mm wire.? Turns count will stay the same.

Lee, w0vt

I made a mistake on my T1 and it's likely easier to rewind using new wire as otherwise it may be short... instead of the 0.33mm wire can I use 0.3mm wire without detrimental effect? Secondly, will I need to calculate a different number of windings than the 30, 4, 4, 4 for 30m for the default 0.33mm wire?

Hello VK5EEE,

0.03 mm diameter difference will make zero measurable or effective
change, in fact it's surprising how little defence the inductance is
with even extreme differences in wire OD for winding coils. You could,
if you could fit the windings on in a similar fashion, use 1.5 mm OD
or 0.5 mm and probably not be able to measure an inductance change
even with good test gear. Start re-winding :)

Wednesday, November 1, 2017

--
Best regards, Chris Wilson (2E0ILY)

On 11/1/2017 3:26 AM, VK5EEE wrote:

I made a mistake on my T1 and it's likely easier to rewind using new wire as otherwise it may be short... instead of the 0.33mm wire can I use 0.3mm wire without detrimental effect?

Yes, the wire size is mostly unimportant.

Secondly, will I need to calculate a different number of windings than the 30, 4, 4, 4 for 30m for the default 0.33mm wire?

No, use the same turns ratio with the smaller wire.? You'll have a bit more space for winding using the smaller wire.? I used #32 on the toroid for my 80-Meter OCX large winding, so didn't overlap the turns.? Worked great!

72 and GL,

Jim, K8IQY

Jim - would you be able to post up a photo of your T1 for 80 metres?

tnx de va3rr