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Posted: Wed Dec 19th, 2018 09:16 am |
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41st Post |
Posted: Thu May 14th, 2020 06:19 am |
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43rd Post |
Posted: Thu May 14th, 2020 01:56 pm |
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44th Post |
Posted: Fri May 15th, 2020 12:55 pm |
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45th Post |
Helmut
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Joined: | Sun Feb 17th, 2013 |
Location: | Friedberg, Germany |
Posts: | 1286 |
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Looks like a TAT IV of old...
____________________ Regards, H.
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Posted: Fri May 15th, 2020 01:51 pm |
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46th Post |
pipopak
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Joined: | Wed Apr 13th, 2011 |
Location: | Florida USA |
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Anybody else remember the Variacs?
Jose.
____________________ Junk is something you throw away three weeks before you need it.
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Posted: Fri May 15th, 2020 08:53 pm |
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47th Post |
Helmut
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Location: | Friedberg, Germany |
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Sure do and still use them.
The only disadvantage can be the ageing selenium rectifier.
BTW, I remember the first-ever transistor throttle I built,
from an article in IIRC 'Railway Modeller' in the early sixties.
All Germanium, pure regulated (!) DC.
Yes, it had a feedback transistor to stabilize the output voltage.
That made the semiconductor count of this circuit three,
relatively expensive those days.
____________________ Regards, H.
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Posted: Fri May 22nd, 2020 01:46 pm |
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48th Post |
Posted: Sun May 24th, 2020 11:50 am |
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49th Post |
Helmut
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Location: | Friedberg, Germany |
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@Si
In the 50's and 60's, there was a guy called Linn H. Westcott AKA 'MR editor', 
who published a lot about electric and the then newfangled transistor circuits.
He designed the so-called True-Action-Throttles.
They were refined by Blunt and Burgess.
____________________ Regards, H.
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Posted: Thu Sep 10th, 2020 07:36 pm |
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50th Post |
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