Finger mistake
20Log(10)(1/67) = ¨C36dB
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-----Original Message-----
From: Lee
Sent: Friday, June 05, 2020 10:05 AM
To:
[email protected]Subject: [nanovna-users] ¡°Fixture In A Hurry¡±. And a Transformer.
Although I got my NanoVNA back in ?February? I have not taken time to work with it much. I did purchase a bag with ?10? PCB edge mount SMA connectors and after yesterday¡¯s traffic about ¡°NanoVna Test fixture¡± decided it was time to get some PCB copper clad and a Dremmel and make up my ¡°Fixture In A Hurry¡±. See attached.
I though what might be fun to test and the transformer I use in a HV power supply came to mind.
It is a CoilCraft part number: FL2015-2LB
I drove the secondary and measure the primary. Both primary and secondary I loaded with 50ohms shunt to ground. (Was the shunt a good idea?)
Turns ratio 1:67 so, if I am operating the calculator correctly this should be 10Log(10)(1/67) = ¨C36dB
I measured S11 and S21 with NanoVNA Saver.
The S21 measurement way down at 50KHz. is about the ¨C36 predicted.
Note the S21 measurement gets the saw tooths (sawteeth?) soon after 50KHz.
+++++++++++++++
Lee Erickson
Spectrum Techniques LLC.
lee@...
