[Hammarlund] Re: SP-600 Question

[JM/CO]

I have a GR-650-A that has been doing faithful duty in the lab for quite
some time. The thing looks really cool too. Right out of "Frankenstein's
Radio Lab". These show up on e-Bay from time to time, and rarely sell for
more than 50 bucks. A steal at that price. The optional P-1 oscillator /
power supply is a must-have. I keep a few GR "standard" inductors and
capacitors around, which are just the thing for checking the accuracy of
these things.
Chuck N1LNH
----- Original Message -----
From: "Roy Morgan" <roy.morgan@nist.gov>
To: <asolway@sympatico.ca>; <hammarlund@mailman.qth.net>
Sent: Sunday, December 01, 2002 8:09 PM
Subject: Re: [Hammarlund] Re: SP-600 Question


> 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
>
> _______________________________________________
> List Administrator: Duane Fischer W8DBF
> ** For Assistance: dfischer@usol.com **
> ----
> http://mailman.qth.net/mailman/listinfo/hammarlund