[Boatanchors] Re: NRI Professional Signal Tracer Model 34.

[kd4e]

I have the M-1400 multimeter and the Discovery Lab
that came with the used 1981 NRI program.

Perhaps the National course materials I have are
similar to what you took and perhaps the missing
courses and documents I am seeking to complete it
will include what you need.

I hope to scan and post everything to my Web page
when I have a chance - should be no copyright troubles
for a 1945 document.

> The N.R.I. correspondence course dates way back into the 30's I am sure,
> maybe as far back as the 20's.
> A good friend of mine took the course in the 40's and later opened the first
> radio/tv shop in my home town. He acquired both the Signal Tracer and
> their NRI Professional R.C. Tester. (Tests resistors and capacitors).
> I moonlighted at his shop and got to really like those two instruments.
> Luckily, I was able to find one of each in more  recent years.
> 
> The signal tracer is "dead" and I am having trouble finding the cause. The
> speaker is the "electro magnetic type" with the speaker magnetic force
> provided by the choke of the power supply. A hum bucking winding is
> included to cancel out hum in the speaker. These windings are in addition
> to the conventional voice coil winding.
> 
> I am open to suggestions - if anyone has had experience with the unit and
> can give me tips, I will appreciate!
> Take care,
> 
> Ken   N5CM



-- 

Thanks! & 73, doc, KD4E
*Have a joy-filled New Year!*
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