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4hv.org :: Forums :: HvWiki Discussion
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SCR page

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Turkey9
Sat Mar 27 2010, 11:56PM
Turkey9 Registered Member #1451 Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Just a little thing, but the section on the SCR page says that the main types are discrete and puck, were in my experience the stud type are some of the most used. It would be nice if it could be modified, as I don't have an account to do it myself.
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Bjørn
Sun Mar 28 2010, 12:30AM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
If someone could take a picture of the different types it would be helpful too.
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dmg
Thu Apr 15 2010, 04:27AM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
I dont know if these help, but they show some types of SCRs, the last picture came from a book that I have.
1271305624 2628 FT86454 A 006

1271305624 2628 FT86454 A 007

1271305624 2628 FT86454 Last
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radiotech
Sun Jul 11 2010, 06:00AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Has anyone tried to use a SCR as an amplifier? By considering the gate as the emitter and the cathode as the base and the anode as the collector we could call it a NPN transistor. By so biasing it this way we inhibit the binary action.

(ref sect 1-10 SCR Manual, 4th ed. 1967, General Electric)

Imagine marketing an amplifier using only SCR's.
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dmg
Mon Jul 12 2010, 02:20AM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
radiotech, that picture came from the GE manual fifth edition, I dont know what year, but it is about the same.
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radiotech
Mon Jul 12 2010, 05:41AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
I'll have to search to see if I have the 5th, I do remember that that topic seemed to disappear after the 4th. The circuit is AKA "remote based transistor"

Its old old stuff yet a Shur Shock fencer is in my shop that uses a programmable unijunction transistor from that era.
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Chris Russell
Mon Jul 12 2010, 07:43AM
Chris Russell ... not Russel!
Registered Member #1 Joined: Thu Jan 26 2006, 12:18AM
Location: Tempe, Arizona
Posts: 1052
Keep in mind that we can't publish copyrighted material in the wiki. Pictures you take yourself are fine, but the picture from the book can't be used, unless someone is willing to use it as inspiration to create an original picture.
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radiotech
Mon Jul 12 2010, 07:30PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
The 5th edition does have the section of remote bas transistors in Sect. 1.8. Same is the 4th.

Last night I located some SCR subassemblies and in them is a SCR the same as the picture. f take it apart, I'll photograph it and the driver board. It came from a first generation SCR drive.
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