[600MRG] 600 meter grid dippers

[Kenneth G. Gordon]

On 16 Jan 2014 at 22:25, Carl wrote:

> I still have the HB GDO I built in 1955 from a 1949 CQ article but it
> hasnt been turned on in ages since I picked up a Measurements 59 and
> coils from the National Radio final sell off in 1992.
> 
> I also got the 59LF head with it but no coils, someday maybe I'll find
> a set.
> 
> Carl
> KM1H

I have three GDOs here: two AN/PRM-10s with all the coils, and a Millen with 
all the coils, including the LF ones. I use the Millen regularly, and used one 
of the  AN/PRM-10s regularly before I got the Millen.

The reason I have two AN/PRM-10s is that I took mine to work once for a 
special project, then loaned it to a professor who needed to use it, who then, 
apparently, lost it. The University bought me a replacement....then the 
orginal one showed up again about 10 years later when the professor in 
question cleaned out his lab.

The Millen I got when the EE Lab was cleaning out all their "junque". They 
were throwing it away, and I glommed onto it....along with some other nice 
equipment. One of the techs who was cleaning out the EE deparement's 
stuff knew that I liked old stuff and called me.

The same thing happened with our Physics department, and with our 
Chemistry department. I got a bunch of NIB power tubes from the Chemistry 
department and some new sockets to fit them.

I also got a couple of nice LCR bridges and a signal generator or two.

My dumpster-diving at the University has really paid off. I sold a replica De 
Forest audion with socket (which was also being tossed) for $1500.00 to a 
collector who knew exactly what it was.

Also, a somewhat damaged original "Navy Coupler" to another collector for 
$300.00.

Well, back to the interesting experiments...

Ken W7EKB