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Hi,
From here:


Outer Conductor Aluminum Tape 0.291 (7.39)
Overall Braid Tinned Copper 0.320 (8.13)

From here:


First Shield Aluminum Tape 0.29 in [7.37 mm]
Second Shield Tinned Copper Braid 0.32 in [8.13 mm]

So, I'd assume 8.13mm for the calculation.

Regards,
Simon

On Sun, Sep 22, 2024 at 12:24?PM John Dusek via groups.io
<johndusek3@...> wrote:

Hi -

I am trying to calculate a small transmitting loop from LMR400 using the Pacific 66 calculator site.

Does anyone know the actual diameter of the LMR400 shield once the black insulator is removed? The actual diameter size is required form accurate calculation.

Appreciateyour help.

John - W3JED

On line calculators are a guide. You don't need that accuracy for inputing.

Simon g0zen