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04/19/24 at 05:07:07

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tube socket pinouts (Read 4810 times)

martin Senior Member Posts: 95	tube socket pinouts 04/19/16 at 15:37:17 Hey, I've noticed that on at least some PCBs the numbers for the first and last pin are printed where the sockets are to be placed. They look reversed to me and I'm wondering what I'm missing. Thoughts? Help!!! 😔
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Core32 Seasoned Member Posts: 1858	Re: tube socket pinouts Reply #1 - 04/19/16 at 15:42:11 Would it be that the sockets are supposed to be mounted on the opposite side of the board from the rest of the components? I've never seen one of those PCBs in person so I can't say I know what I am talking about. :-[
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martin

Senior Member

Posts: 95

Re: tube socket pinouts
Reply #2 - 04/19/16 at 16:03:46

That was one of the first things I wondered about but I looked around and found pictures of sockets mounted to PCBs. They showed what I believe is pin one on the socket with a "9" or a "7" on the PCB beneath it. Just to be sure I understand it correctly, if I take a 7 pin socket, for example, and hold it so I'm looking at the side the tube goes in, pin 1 is the first pin clockwise after the gap, isn't it?

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Core32 Seasoned Member Posts: 1858	Re: tube socket pinouts Reply #3 - 04/19/16 at 17:10:35 I think you have it backwards based on this post: http://www.antiqueradios.com/forums/viewtopic.php?f=6&t=213608 And this image: And as a double-check maybe follow the trace of one of the pins to other board circuitry to see if it makes schematic sense.
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