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  • Re: Beomaster 1000 model 2318 repair project

    [quote user="Dillen"]Can you do some measurements around the driver transistors?[/quote] Hi Martin I've done measurements around the driver transistors and may have found the culprit. It was a process of trail and error between left (not working) and right (working). All measurements were...
    Posted to The Workbench (Forum) by AntonvZ on Fri, Feb 28 2020
    Filed under: Beomaster 1000 Model 2318, driver transistor, u2734, bc141
  • Re: Beomaster 1000 model 2318 repair project

    [quote user="Dillen"]DC reading on the output rail [/quote] Copious amounts of googling left me with no idea where/what the output rail is - going to need a bit of help with finding that. For what its worth I am picking up DC readings in the 27-29V range on the output resistors on the left...
    Posted to The Workbench (Forum) by AntonvZ on Wed, Feb 26 2020
    Filed under: Beomaster 1000 Model 2318, output rail, DC output rail
  • Beomaster 1000 model 2318 repair project

    Hi all, my first post on this forum. You guys are doing a sterling job and thanks for all the wisdom shared, it has already helped me a lot. The reason for me wanting to restore/repair the old lady is that it is of huge sentimental value, it was bought the year I was born and has been in my family ever...
    Posted to The Workbench (Forum) by AntonvZ on Wed, Feb 19 2020
    Filed under: Beomaster 1000, Beomaster 1000 Model 2318
  • Re: Beomaster 1000 model 2318 repair project

    Update The left channel has sound again ! First my thanks to Martin, without his help I'm very doubtful I would have found the problem so quickly. It was indeed the left channel transistor U2734 (hard to find specs on) that led me to a similar transistor BC141 (see previous post for spec of BC141...
    Posted to The Workbench (Forum) by AntonvZ on Mon, Mar 2 2020
    Filed under: Beomaster 1000 Model 2318, bc141, BC161
  • Re: Beomaster 1000 model 2318 repair project

    [quote user="Dillen"]You can use a 2N3055 if you don't have a 2N5034 . You will have to adjust the voltage regardless.[/quote] Hi Martin Thanks as always. Swopped out the 2N5034 with a 2N3055. Update and Edit, just to set the record straight. My Beomaster 1000 version 2318 came with 2N3055...
    Posted to The Workbench (Forum) by AntonvZ on Thu, Mar 5 2020
    Filed under: Beomaster 1000 Model 2318, 2N3055
  • Re: Beomaster 1000 model 2318 repair project

    [quote user="manfy"]Yes, I think BC161 is a good choice here[/quote] Well Manfy you rock, thanks to your help and suggestions the power circuit is stable at 30V It was the "BC154" that was the culprit, the moment the BC161 went in everything started working. Reason why "BC154"...
    Posted to The Workbench (Forum) by AntonvZ on Thu, Mar 12 2020
    Filed under: Beomaster 1000 Model 2318, bc154, 87040, SGS87040
  • Re: Beomaster 1000 model 2318 repair project

    [quote user="Dillen"]Any chance of photos of the back, the dial and the serialnumber label?[/quote] Coming right up, but not sure which dial you are refering to.
    Posted to The Workbench (Forum) by AntonvZ on Thu, Feb 20 2020
    Filed under: Beomaster 1000, Beomaster 1000 Model 2318
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