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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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Thread Tools |
6th Mar 2021, 10:13 am | #1 |
Banned
Join Date: Feb 2017
Location: Bedfordshire, UK.
Posts: 601
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Marconi 2437 minor display issue
Not long brought one as grade B stock but every now and again the 4th segment LED when it shows the number 2 or similar sometimes the middle segment does not show and you get the middle of the figure missing? Is this possible led outright segment issue or best to replace display? Also takes a while to read any information. Is this just warm up time or something more serious needing attention possibly?Im also having the duration time issue with a Racal 1991 aswell but all segments good on that one, any advices greatly appreciated. I appreciate there aged now but both in very good condition and still very credible for there works for what they are.
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6th Mar 2021, 10:41 am | #2 |
Octode
Join Date: Sep 2004
Location: St. Albans, Hertfordshire, UK.
Posts: 1,478
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Re: Marconi 2437 minor display issue
If it's just one segment of just one digit it can only be a dry joint on the back of the pcb or a dud display digit.
Need a bit more detail re "takes a while to read any information". What are you trying to measure? What is the input signal? What are the settings? What are all the LEDs doing?
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Regards, Richard, BVWS member |
6th Mar 2021, 12:47 pm | #3 |
Banned
Join Date: Feb 2017
Location: Bedfordshire, UK.
Posts: 601
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Re: Marconi 2437 minor display issue
Hello Dickie-yes shall take a look at the dry joint issue if there is one seems like always the starting point Input wise just some frequency inputs from audio oscillator and test output frequency from a Wow And Flutter meter Kenwood KL180 which normally would display 3.150 etc as it does and internally monitors whilst on speed tests etc as a stand alone unit etc. Its just to see the workings of at the moment and have only just located a user manual etc, but great bit of kit all the same for what I paid for it and have two others anyway of different makes Vellerman and Racal the Vellerman being far newer But used to run a TTi years ago and that was just plug and play so to type
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