[Hammarlund] Re: SP-600 Question

[Roy Morgan]

At 11:18 AM 12/1/2002 -0500, you wrote:
>
> > I might ask how you measured the inductance.
> >
>
>I have on old GR650A Impedance Bridge with the 650-P1 Oscillator-Amplifier.
>Seems to work OK but has not been calibrated since 1973.

Al,

HAH!  They don't go out of calibration. Period.  Checking them is an 
excercise in nostalgia. It's good for you. (Can you tell I have great faith 
in these things?)

>Does anybody have or know of a calibration procedure source for this bridge.
>The manual only gives maintenance instructions not calibration.

Yes, I have the manual (which includes the Oscillator-Amplifier), and also 
a calibration instruction I think.. 'Glad to make you a copy.  Send address.

Any one else need a copy? Remember, this is the 60-pound, slope fronted, 
walnut-cased RLC bridge that was made from about 1930 till about 
1960.  (Any one who has the predecessor to the 650A, please let me know.)

No home should be without one.  Even if you DO have the newer 1650A.

Roy
GR spoken here.


Roy Morgan
K1LKY since 1959
7130 Panorama Drive, Derwood MD 20855
301-330-8828 home .... 301-975-3254 work
roy.morgan@nist.gov