OT: Calibrated Signal Generator

[Howard W. Ashcraft]

I recently built the rf  power meter discussed in the last QEX and QST
issues.  It was a fun project and works very well.  However, it needs to
be calibrated and this requires either an accurate (i.e. calibrated)
reference meter or a calibrated rf signal generator capable of -70 dbm
to +7 dbm (or somewhere close to those numbers).  Unfortunately, no one
in my local club has such equipment and several calls to possible
sources have not been fruitful.  I am located in Alameda, CA.  Does
anyone have a calibrated signal generator or know where I could get
access to one?

Thanks


Howard Ashcraft, W1WF
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[N8LP]

Check back in Jan 2004 QEX. There was a construction article on a nifty
little calibrator that you can build cheaply that would work perfectly.
It was written by K3NHI. It used a CMOS clock, battery and a few other
parts, and only requires a DVM to calibrate.

Larry N8LP


Howard W. Ashcraft wrote:

>I recently built the rf  power meter discussed in the last QEX and QST
>issues.  It was a fun project and works very well.  However, it needs to
>be calibrated and this requires either an accurate (i.e. calibrated)
>reference meter or a calibrated rf signal generator capable of -70 dbm
>to +7 dbm (or somewhere close to those numbers).  Unfortunately, no one
>in my local club has such equipment and several calls to possible
>sources have not been fruitful.  I am located in Alameda, CA.  Does
>anyone have a calibrated signal generator or know where I could get
>access to one?
>
>Thanks
>
>
>Howard Ashcraft, W1WF
>_______________________________________________
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>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
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>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com
>
>
>
>  
>

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[Don Wilhelm-3]

Howard,

There are alternatives to using another signal generator (and how do you
know you can trust its calibration) --

The Elecraft XG1 provides 2 levels that may be usable for calibrated lower
levels (-107 dBm and -73 dBm), and a calibrated 'scope that has adequate
vertical sensitivity along with a volts to dBm conversion chart should show
you the higher levels.

73,
Don W3FPR

> -----Original Message-----
>
> I recently built the rf  power meter discussed in the last QEX and QST
> issues.  It was a fun project and works very well.  However, it needs to
> be calibrated and this requires either an accurate (i.e. calibrated)
> reference meter or a calibrated rf signal generator capable of -70 dbm
> to +7 dbm (or somewhere close to those numbers).  Unfortunately, no one
> in my local club has such equipment and several calls to possible
> sources have not been fruitful.  I am located in Alameda, CA.  Does
> anyone have a calibrated signal generator or know where I could get
> access to one?
>
> Thanks
>
>
> Howard Ashcraft, W1WF

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