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  • Re: BM1900 testing signal throughput

    I ordered these lamps, they arrived today: besides that the lamps may burn, would these 50 mA's do any harm to the LDR's?: the 35 mA's are bigger and can only be mounted, bunched up as on the first picture. the second picture shows how the 50 mA goes in. Before I go on I hope that someone has good advice. Aad
    Posted to The Workbench (Forum) by Aad Jansse on Thu, Mar 26 2020
  • Re: BM1900 testing signal throughput

    placing the bigger lamp gives problem wthe height of the aluminium cover.
    Posted to The Workbench (Forum) by Aad Jansse on Thu, Mar 26 2020
  • Re: BM1900 testing signal throughput

    There are also lamps available, 12V/ 50 mA, which one will suit best? As to the size, this one looks better, however the mA’s differ.
    Posted to The Workbench (Forum) by Aad Jansse on Tue, Mar 24 2020
  • Re: BM1900 testing signal throughput

    I found this on the internet: is it worth trying? Aad
    Posted to The Workbench (Forum) by Aad Jansse on Sun, Mar 22 2020
  • Re: BM1900 testing signal throughput

    Wonderfull to get all this advice. As to the lamp issue : Dillen told me some posts ago what to do and not. what my question about the lamp replacement by a LED can be clarified by a picture that missed my previous post; here it is now. As to the scope:I used once, a century ago, a scope, but my borrowed one has an usermanual in German which language is much les than my English. What I actually want to know: could I do any harm to the circuits when I put the probe on whatever place in a pcb and then
    Posted to The Workbench (Forum) by Aad Jansse on Sat, Mar 21 2020
  • Re: BM1900 testing signal throughput

    this is the item that shows the (tiny) lamp I am talking about. Aad
    Posted to The Workbench (Forum) by Aad Jansse on Sat, Mar 21 2020
  • Re: BM1900 testing signal throughput

    As you know this is the lamp that sets the light-dependant resistors to work.
    Posted to The Workbench (Forum) by Aad Jansse on Sat, Mar 21 2020
  • Re: BM1900 testing signal throughput

    I am overwhelmed by all the information, thank you for this lesson, however, I am sorry for not mentioning that I have not already actually replaced the lamp by the LED., I just wanted to make sure that I would not make a ignorant move; therefore the remaining question is now: can I acquire somewhere such a tiny lamp and restore this unit 8002293? Aad
    Posted to The Workbench (Forum) by Aad Jansse on Sat, Mar 21 2020
  • Re: BM1900 testing signal throughput

    Nice to know now: I could borrow this "old school", Russian, scope from a friend who inherited this thing from his father but has no idea how to use it, neither do I; would you be so kind as to show me what the position should be, for doing the above mentioned measurement, of the various knobs and buttons. Meanwhile i would like to get some advice as to the problem with the volume control, part nr 8002293, it appears that the lamp in it is faulty. Is there a possibility to fix this (a new
    Posted to The Workbench (Forum) by Aad Jansse on Fri, Mar 20 2020
  • BM1900 testing signal throughput

    Apart from questions in other threads pertaining to the various issues I have with a couple of BM1900s, I would like to know if it is possible, without using a signal generator, to see any activity on a scope, e.g. the signal from a connected tape or record player? Aad
    Posted to The Workbench (Forum) by Aad Jansse on Thu, Mar 19 2020
    Filed under: Beomaster 1900
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