[Milsurplus] Unk circuit board from ?

[Mike Feher]

Hi Gordon -

 

Thank you for your comments. I certainly agree with your points. I started
working at Magnavox in early 1967 on ASW systems that were used aboard a P3C
aircraft and later other platforms. We predominantly used Raytheon and
Westinghouse flat pack ICs in the design. Of course I guess money was no
real object and size, power and heat were. Even our breadboards used the
same ICs. So, I was just speaking from my experience. Thanks - Stay healthy
& 73 - Mike  

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

 

From: milsurplus-bounces at mailman.qth.net
<milsurplus-bounces at mailman.qth.net> On Behalf Of Gordon Smith
Sent: Thursday, May 7, 2020 12:55 AM
To: Mike Feher <n4fs at eozinc.com>; 'Hubert Miller' <Kargo_cult at msn.com>;
'Military Surplus Mail List' <Milsurplus at mailman.qth.net>; 'Army-Radios'
<main+owner at Army-Radios.groups.io>
Subject: Re: [Milsurplus] Unk circuit board from ?

 

Hi Mike,
If I may comment, it believe it makes economic sense that Raytheon was
making discrete logic modules in the middle 60's. Advantages where:

1) Integrated circuits were not that cheap at this time and were still
fairly new where as discrete logic circuits had been around for awhile and I
believe were cheaper.
2) Space was not at a premium for this type of application (hence no need
for a smaller IC)
3) The modules were part of a breadboarding/R&D system for digital circuits.
As such, the people purchasing this system wanted to learn about digital
systems, not this new fangled IC stuff
4) One could repair the modules in this system. Because of the relatively
newness of them, people did not know about the high reliability of IC's. 
5) Because everything was "open", you could modify anything on it and check
anything on it. This allowed people to experiment

#4 I think is very important. Electronic gear back in the 60's was expected
to be able to be fixxed by technical personnel. I have a very nice
Non-Linear Systems Voltmeter that was made in the mid 60's that is ALL
discrete components. Really neat to look at. I also have a very nice
transistor based high end stereo system radio that has only discrete
components in it. I've been told that as long as there are competent
electronic techs out there, I can always expect to be able to fix it and
keep it working. Compare that to some radios that have specialized IC's that
are unobtanium now if they ever fry, rendering the radio dead because one IC
died.

Just an opinion, thank you for your time.

73, Gordon KJ6IKT


At 04:31 PM 5/6/2020, you wrote:



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I find it surprising that Raytheon would be building discrete logic
functions as late as 1966. By that time numerous companies had IC logic
functions available, including Raytheon. 73 - Mike 
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