Mag Loop Antenna info. 2E0ERO's version (and others).

VK3ZYZ

Moderator
Staff member
Stepper25to1.jpg

Just for fun, here is 2 x 5:1 planetary gearboxes in series for 25:1 reduction.
On this stepper, it gives 3200 steps per rev.
 

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VK3ZYZ

Moderator
Staff member
Stepper25to1_S.jpg

I tried the stepper with the 25:1 gears on the mag loop and it drives, but not on the 9V power supply. 24V is ok.
3.5MhzNotch_S.jpg

This is the notch seen on the nano VNA.

But, the stepper driver featured earlier generates a lot of hash. That is aggravated by me running the stepper motor over around 10M or so if CAT5 cable.
I'll try again with a non PWMed driver.
 

BillC

Active member
I spotted a mag loop, I think it was / is on a military vehicle in Ukraine. Possibly an HF230L 2-30 meg mag loop !
 

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