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  • Re: Beolab 5000 (1967) owners

    I'm no quitter, but I find the schematics for this amp hard to read. There is something wrong in my pri-amp. Now I have the same sparkling noise on all inputs. A weak ago it was only phono & Mic. On the right side, I measure OK on transistor 41 & 56. But on 86 & 99 the voltages are too high. Tried to replace them, same result. On transistor 86 I get 33V on collector, 22V on emitter and 14V on base. On transistor 99 I get 33V on collector, 22V on emitter and 33V on base. Transistor
    Posted to General Discussion & Questions (Forum) by Frank Solem on Tue, Jul 20 2021
  • Re: Beolab 5000 (1967) owners

    Thanks, but the fault comes at the same time on Phono and Mic. So it has to be a common component. It has been playing flawlessly for 2,5 hours now, until the bonfire just returned. The bonfire is thinner in Mic than on Phono, but pretty much the same pattern. But it is a much thinner sound compared to the rich crackling in the Phono. Strange.. I don't think it will help, but I'll try replacing the transistors, and will be back :) Edit, I also did check the level switches. Together with cold
    Posted to General Discussion & Questions (Forum) by Frank Solem on Thu, Jul 15 2021
  • Re: Beolab 5000 (1967) owners

    Dillen, Since the problem is in the phono stage and Mic only, I'm thinking is has to be a problem with preamp 1 or amplifier 2, right side. I have used the gold muse caps on that whole board, exept the four bigger caps, 2x400uf(142&182). There I used 2x 390uF Nichicon, but I cannot see the type. 2 x 160uF(63&89). There I used 190uF Nichicon, cannot see the type. I have used the same capacitors on right/left side. Only right side has the problem. I can see now that I haven't changed
    Posted to General Discussion & Questions (Forum) by Frank Solem on Thu, Jul 15 2021
  • Re: Beolab 5000 (1967) owners

    I used mostly general electrolytic capacitors. But sure, you are onto something I didn't think of. I understand you are NOT supposed to use to high spec capasitors, right? All values are directly replacements, with some higher voltages, but all uF has been swapped with same nearest value. I have used some Nichicon FW Gold Muse caps from 3-100uF. Are they to low-ESR? Great tip Martin!. Thanks BR Frank
    Posted to General Discussion & Questions (Forum) by Frank Solem on Wed, Jul 14 2021
  • Re: Beolab 5000 (1967) owners

    Hi. Is the Phono and the Mic input crossing signals on the priamp? I have changed all electrolytic caps(not tantilum) and transistors, but after playing vinyl for 30 mins, i get some awful distortion in the right channel. Sounds like a camp fire in the speaker. The speaker is OK. If I turn the volume down, it's gone. The higher the volume, the higher distortion. Suddenly it can be quiet for several minutes, before it starts again. The MIC input has similar noise, AUX and TUNER is perfect.
    Posted to General Discussion & Questions (Forum) by Frank Solem on Wed, Jul 14 2021
  • Re: Beogram 1700, tech help needed

    Hi I had the same problem with mine. It was related to the three black rubber bushings on top of the motor. They had gone bad and the angle of the motor was wrong. One rubber bushing sits alone, the two others are around the fastening screws for the motor. All to be accessed from the top. I managed to find some new bushings in a toystore that sells remote operated toy cars and planes. Have a close look at the bushings. Try to put something in between the motor and te flate to get it straight. If
    Posted to BeoGram (Forum) by Frank Solem on Fri, Jun 25 2021
  • Re: Privat survey of Beolab 5000 - Beomaster 5000 producs

    Posted to Vintage Products (Forum) by Frank Solem on Fri, Apr 16 2021
  • Re: Privat survey of Beolab 5000 - Beomaster 5000 producs

    New Beolab 5000 arrived from UK. Nice condition. Going to change the main cap and filter caps, then check how it looks. I had 60V main voltage and some 30V centre-voltage when I did a quick check today. Beolab 5000 Serial 33320 Serie 07
    Posted to Vintage Products (Forum) by Frank Solem on Thu, Mar 18 2021
  • Re: Beolab 5000 diagnostics

    All good, it was transistor 336, a BC154 that was faulty. Replaced with BC557BTA and now working fine. What about the heat-problem on the resistor for the main light. Any well known solution for that?
    Posted to Vintage Products (Forum) by Frank Solem on Wed, Mar 17 2021
  • Beolab 5000 diagnostics

    Hi I have tried to search for a thread that describe diagnostics 101 for the Beolab 5000, but cannot find any. I just purchased a tired one for way too much money, but are getting progress now. I have sanded the rust on most of the metal, except the bottom plate and some minor rust on some brackets. Given the trafo a new look(sorry, not original) and changed all capacitors. I kept the original capacitor look of the mains cap and coupling caps. Just pulled the innards out and placed a brand new nichicon
    Posted to Vintage Products (Forum) by Frank Solem on Tue, Mar 16 2021
    Filed under: vintage, 5000, Beolab 5000, repair.
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