DIYbanter - View Single Post - Calibration Of Electronic Equipment In The Home Workshop

MassiveProng

On Thu, 1 Mar 2007 03:50:23 +0000 (UTC), (Ken
Smith) Gave us:

In article m,
Too_Many_Tools wrote:
I have a well stocked test bench at home containing a range of analog,
digital and RF test equipment as I am sure most of you also do.

Well the question I have is how do you handle the calibration of your
equipment? What do you use for calibration standards for resistance,
voltage, current and frequency?

For frequency, you can use WWV. You need:
A short wave radio with an audio output.
Perhaps an audio filter tuned to about 1KHz.
A generator you wish to calibrate near the WWV frequency.
A frequency counter that is not too far off.

Procedu
Tune in WWV.
Put wire on generator and set it to WWV-1KHz
Listen for tone and move stuff around until it sounds good.
Feed tone into the filter.
Place the counter on the output of the filter.

The number on the counter is X Hz away from 1KHz when the generator is XHz
off from WWV-1KHz.

Joe Kane's audio video set up discs on Laser Disc, and DVD, and now
HD DVD are the bee's knees for a lot of audio spectrum sine wave
tones.

DVD $20, Player $40 TV and Audio gear already owned.

Catching it off some transmission has to be far more inaccurate.
Short wave receiver worth having $100 plus. Then add in audio gear?

Catching you thinking old is better than new after your brow beating
of BAH... priceless.

Hehehe... just kidding...