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 Post subject: NRI Model 35 Signal Tracer
PostPosted: Jan Mon 15, 2018 4:03 pm 
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Recently picked up a Working Model 35 w/ Operating Instructions. I can't seem to find any information on its age - any one know when these were built? Also, where spare tubes ((6BA6, 6AU6, 6AK6, 6E5, 6X4) tubes cab be obtained?


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Mon 15, 2018 10:39 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Latham NY
Are you sure it's a 35? I have seen the 33 and 34 but not a 35.


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Tue 16, 2018 4:26 am 
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That's what it says on the front panel.


Attachments:
NRI Professional Signal Tracer Model 35.JPG
NRI Professional Signal Tracer Model 35.JPG [ 108.52 KiB | Viewed 1299 times ]


Last edited by SteveSchaefer on Jan Tue 16, 2018 5:30 pm, edited 1 time in total.
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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Tue 16, 2018 4:27 am 
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Speaker on this unit is on the left side.


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Tue 16, 2018 6:11 am 
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Location: RI, 02885
I was able to track information on a few other NRI testers I once owned. There is an NRI site I stumbled over that has scans of the newsletters that were issued in the 40's & 50's. I worked my way through many issues to find articles about the various testers and schematics were also included. I no longer have the site address so you will have to do a search to locate it. Good luck, it's out there somewhere.

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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Tue 16, 2018 10:14 am 
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SteveSchaefer wrote:
Also, where spare tubes ((6BA6, 6AU6, 6AK6, 6E5, 6X4) tubes cab be obtained?

See the list of tube suppliers in the first post in this thread:
viewtopic.php?f=19&t=201537

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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Tue 16, 2018 3:05 pm 
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Location: RI, 02885
Here is a link to the NRI Newsletters. The Model 34 was still being used in 1950 so the 35 will be cited in later issues. I know I had to open a lot of issues to accumulate information on the units I once had. Good luck.

http://www.americanradiohistory.com/Nat ... o_News.htm

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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Tue 16, 2018 7:17 pm 
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SteveSchaefer wrote:
That's what it says on the front panel.

... and it states "PROFESSIONAL" on front panel too! :shock:

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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Thu 18, 2018 12:39 am 
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Joined: Jun Sat 09, 2007 8:14 am
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Location: Florida
I don't know about the 35 but my model 34 is built like a tank and used good quality parts overall. NRI equipment was assembled as part of the course and intended to be used to set up the student's shop.

RRM


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Thu 18, 2018 2:56 am 
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Yea, I've read about the 34 kit. I was lucky enough to buy out and old electronics engineer's home workshop. Most of the equipment can be found on the internet, but the processional 35 isn't represented. Ac ouding to the technical manual that came with the signal tester says it was fully assembled and ready to use when deboxed. Outside of the manual, can't find out very mush. Guess I should just be happy it works and tunes in local radio stations after all these years.


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Fri 19, 2018 1:50 pm 
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Zip codes were started in 1963 so it predates that I guess. Nice you got the manual for it. The 33,34 and 35 came already assembled as mentioned. I have a 34 and it comes in handy sometimes. I wouldn't be too concerned about getting tubes for it, I bet it wasn't used a lot and the tubes are likely to be good as new.


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Fri 19, 2018 10:48 pm 
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I was under the impression that all NRI and CONAR kits were either kits built during the courses or purchased assembled. I have seen VTVMs that were kits. Which of the others were (tracers, generators, RC bridges, etc.)?

RRM


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Fri 19, 2018 11:11 pm 
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Almost all Conar kits were available without the correspondence course in the 1960s:

http://www.americanradiohistory.com/hd2 ... e-0049.pdf

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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Jan Sat 20, 2018 4:50 pm 
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Except for the vtvm these other instruments were optional to the course and were purchased separately as far as I know.


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Mar Sun 04, 2018 12:55 am 
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Joined: Mar Sat 03, 2018 10:32 pm
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Location: Elk Grove, CA
I just received a N.R.I. Model 35 signal tracer. I don't have any paperwork on it. I wonder Steve if you could scan the manual and send me a copy. I would really appreciate it. I would certainly pay for any expenses incurred.

Jim84


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 Post subject: Re: NRI Model 35 Signal Tracer
PostPosted: Mar Sun 04, 2018 10:45 am 
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Joined: Mar Sat 03, 2018 10:32 pm
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Location: Elk Grove, CA
For your information...The model 35 was offered for sale in the N.R.I. Newsletter in the Dec./Jan. 1958/1959 issue for $57.50.


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