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johnwater
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Post subject: attaching test lead to printed circuit board tube socket pin  Posted: Jul Sun 14, 2019 4:14 am |
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Joined: Mar Fri 23, 2012 10:57 pm
Posts: 19
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i have motorola am receiver that has a pcb connecting all the wires to tubes and components.
alignment with signal gen says to connect hi lead to pin 7 of converter tube, but tube socket is soldered to pcb ,no terminal on pcb.
what is the practical way that this is done.
i don't think i can get an alligator clip to hold on the pcb.
thanks
john
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fifties
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Post subject: Re: attaching test lead to printed circuit board tube socket Posted: Jul Sun 14, 2019 4:17 am |
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 33763
Location: SoCal, 91387
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Make your own test terminal, by soldering a short lead to the pin 7 PCB landing or socket pin, on the upper side of the board.
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johnwater
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Post subject: Re: attaching test lead to printed circuit board tube socket Posted: Jul Sun 14, 2019 12:42 pm |
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Joined: Mar Fri 23, 2012 10:57 pm
Posts: 19
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Dale H. Cook
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Post subject: Re: attaching test lead to printed circuit board tube socket Posted: Jul Sun 14, 2019 4:59 pm |
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Joined: Feb Sun 02, 2014 9:13 pm
Posts: 2077
Location: Roanoke, VA
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Scott
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Post subject: Re: attaching test lead to printed circuit board tube socket Posted: Jul Sun 14, 2019 5:50 pm |
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 5830
Location: Montvale NJ, 07645
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I agree with the test socket adapter except in the case of an oscillator or converter tube, in which case I would take Fifties approach.
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rocketeer
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Post subject: Re: attaching test lead to printed circuit board tube socket Posted: Jul Mon 15, 2019 12:29 pm |
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Joined: Mar Tue 30, 2010 2:24 am
Posts: 8547
Location: Lehighton, PA.
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Be very carefull applying heat to those early PCB boards. There is a tendency for the traces to fall off when heated. Personally I would use a test adaptor.
Larry
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