old test equipment found

From: Carlos Murillo <carlos_murillo_at_epm.net.co>
Date: Tue Nov 26 07:46:00 2002

I've recently come across three pieces of vintage test
equipment; a Precision brand signal tracer, a Heathkit
audio analyzer and a Radiometer Copenhaguen model HO-32
beat frequency oscillator. Here are some pics;
the ones marked "small" are 60KB on average and the
others are roughly 600KB and highly detailed:

http://nazas.autonoma.edu.co/heathkit_audioanalyzer-small.jpg
http://nazas.autonoma.edu.co/heathkit_audioanalyzer.jpg
http://nazas.autonoma.edu.co/heathkit_audioanalyzer_bottom-small.jpg
http://nazas.autonoma.edu.co/heathkit_audioanalyzer_bottom.jpg
http://nazas.autonoma.edu.co/heathkit_audioanalyzer_top-small.jpg
http://nazas.autonoma.edu.co/heathkit_audioanalyzer_top.jpg
http://nazas.autonoma.edu.co/precision_tracer_model_st-22.jpg
http://nazas.autonoma.edu.co/precision_tracer_model_st-22_small.jpg
http://nazas.autonoma.edu.co/radiometer_copenhagen_ho32_BFO-small.jpg
http://nazas.autonoma.edu.co/radiometer_copenhagen_ho32_BFO.jpg

The Heathkit audio analyzer passed visual inspection (pretty
clean and caps looked ok) and I powered it up. It seems to work.
The Precision signal tracer is not working; somebody took off
the rectifier tube/valve and soldered a couple of diodes; I suspect
that at least one filament is open (pins 3 and 4, right? It's been
a long time since I last worked with tubes). I certainly want to
restore it; I like the "magic eye" indicator tube. The
Radiometer Copenhagen gear I haven't powered up because several
large electrolitic caps show signs of deterioration. The construction
of this last device is outstanding in terms of the quality of the
components. The Heathkit is pretty good too; not so the
Precision signal tracer.

Now the question: can you please take a look and see if

1) you have docs for any of these,

2) might guess what the operating procedures are and what the controls
and connectors are for? Some I can guess, others I don't know.

regards,

carlos.


--------------------------------------------------------------
Carlos E. Murillo-Sanchez carlos_murillo_at_nospammers.ieee.org
Received on Tue Nov 26 2002 - 07:46:00 GMT