Friday, November 6, 2015

S9 signal generator Updated 12/1/15

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While waiting for some parts for the Spectrum Analyzer, I was looking around for a quick project. There was a post on the QRP-tech yahoo g...
12 comments:
Saturday, October 31, 2015

SPECAN 2nd IF filter UPDATED 11/4/15

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Got back to work on the spectrum analyzer, with the 2nd IF filter board.     Revised 11/4/15  This is two filters that are relay switc...
1 comment:
Monday, October 26, 2015

Power meter and reference finished.

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I finished up the AD8307 power meter and -10dBm reference.  For the reference I soldered some .020 in double sided circuit board material...
Sunday, October 18, 2015

20 Mhz. power Reference & Calibrating the Ad8307 power meter

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I had the AD8307 power meter working, and compared it against the Chinese SNA in watt meter mode.  The SNA has a built in step attenuator, u...
1 comment:
Friday, October 16, 2015

An AD8307 power meter

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When I started on the SPECAN spectrum analyzer, I purchased several AD8307 log detectors. I found several slightly different designs for po...
1 comment:
Thursday, October 1, 2015

SNA jr Re-build Updated 11/9/2015

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There is a upcoming 'Makers Fair' in Atlanta, and several of the local Ham Radio clubs are going to have a display there.  They will...
6 comments:
Monday, September 7, 2015

My SPECAN 2nd IF Amplifier

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I did a circuit board layout for the 2nd IF amplifier and quickly etched a board.  Everything is surface mount on the top of the board with ...