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<blockquote data-quote="pgh13" data-source="post: 854309" data-attributes="member: 191774"><p>I was always fascinated by electronics at school but early efforts weren't very successful; e.g. trying to build a 3 transistor radio with a soldering iron heated in an open fire and failing to get much out of a Sinclair Micro6. </p><p></p><p>Then, in my 20s I retrained in process control - a great mix of the techniques of measuring the various physical values - pressure, level, flow and temperature, transmission of signals by pneumatics and electronics and then the generation of the output, mainly by pneumatic controllers in those days, up to the relatively heavy engineering of the valves used to control the process.</p><p></p><p>This was at the tail end of the valve era and when I started working in this area the mainstay panel recorders were by Honeywell and Leeds and Northrup with their ECC83 based amplifiers and vibrating chopper circuits to enable the low thermocouple voltages to be amplified.</p><p></p><p>Got on well with Op-amps, the company bought some German weighing machines which made extensive use of them in the signal processing section.</p><p></p><p>Left industry and taught in a tech college for a couple of years. Got into satellite because SWMBO was learning German and so we got a s/h Amstrad SRD200 to get German TV (and it was something techie to fiddle with <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /> ).</p><p></p><p>These days i'm still more into fixing then ground-up building</p></blockquote><p></p>
[QUOTE="pgh13, post: 854309, member: 191774"] I was always fascinated by electronics at school but early efforts weren't very successful; e.g. trying to build a 3 transistor radio with a soldering iron heated in an open fire and failing to get much out of a Sinclair Micro6. Then, in my 20s I retrained in process control - a great mix of the techniques of measuring the various physical values - pressure, level, flow and temperature, transmission of signals by pneumatics and electronics and then the generation of the output, mainly by pneumatic controllers in those days, up to the relatively heavy engineering of the valves used to control the process. This was at the tail end of the valve era and when I started working in this area the mainstay panel recorders were by Honeywell and Leeds and Northrup with their ECC83 based amplifiers and vibrating chopper circuits to enable the low thermocouple voltages to be amplified. Got on well with Op-amps, the company bought some German weighing machines which made extensive use of them in the signal processing section. Left industry and taught in a tech college for a couple of years. Got into satellite because SWMBO was learning German and so we got a s/h Amstrad SRD200 to get German TV (and it was something techie to fiddle with :) ). These days i'm still more into fixing then ground-up building [/QUOTE]
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