Sign in   |  Join   |  Help
Click here to tell us about your new email address

Search

  • Re: Penta trimmer adjustment

    [quote user="Bram"] How did it start? Were they always humming or only after something changed in the system or even in the house? No new appliances or something new hooked up to the amplifier? Have you tried using the pentas with a different amp or using the line in´s with a different amp? Just to make sure it´s not an external problem. I resoldered all the output transistors and some of the smaller ones which looked less solid, but only the output ones had been physically
    Posted to The Workbench (Forum) by Weebyx on Wed, Apr 19 2017
  • Re: Penta trimmer adjustment

    [quote user="Dillen"] Most Penta amplifiers will hum a bit if the input is not connected to anything or grounded. Have you tried grounding the input? Martin [/quote] The hum in the "silent" one, is very low, and seems normal, and is not hearable during low volume. In the "loud" one, it is very different, and more of a "50hz, without having measured yet". There is also much more "static noise" in the midrange, treble units, on the penta that hums.
    Posted to The Workbench (Forum) by Weebyx on Wed, Apr 19 2017
  • Re: Penta trimmer adjustment

    [quote user="Bram"] How did it start? Were they always humming or only after something changed in the system or even in the house? No new appliances or something new hooked up to the amplifier? Have you tried using the pentas with a different amp or using the line in´s with a different amp? Just to make sure it´s not an external problem. I resoldered all the output transistors and some of the smaller ones which looked less solid, but only the output ones had been physically
    Posted to The Workbench (Forum) by Weebyx on Wed, Apr 19 2017
  • Re: Penta trimmer adjustment

    [quote user="Bram"] Sorry for the abscence, easter holiday got in the way. After resoldering the output transistors and making sure the ntc made good contact with the body I tried again..: and all is well! During installment of the caps, etc caution is advised when laying the pcb on the transistors; flipping it over so many times caused old soldering to break. Let me know what you find with the scope next week. Even though my problem in the end was just soldering, while on holiday I´ve
    Posted to The Workbench (Forum) by Weebyx on Tue, Apr 18 2017
  • Re: Spotify now integrated into V1, BV11 and BV12NG

    [quote user="Millemissen"] Time to change the title of this thread to: 'Spotify now DIS-integrated into.....' As of today the Spotify app on my V1 is gone. I wonder if integrating Spotify Connect could be possible, or if the hardware does not allow for it? MM [/quote] I read on a fb page that Spotify will be removed from all products. It should also has been removed from BV11 already ? /jacob
    Posted to General Discussion & Questions (Forum) by Weebyx on Sun, Apr 16 2017
  • Re: Penta trimmer adjustment

    [quote user="Bram"] If done in a neat way and without shorting anywhere or passing close to some powerful field or oscillating current, then not likely. I kind of liked the board in comparison to other B&O boards; the boards in my 4500´s were much more sensitive. Does it sound like 50Hz powerline hum? Have you switched cables? Did you switch left and right with the mode button? There´s no possible hum source near cable or amp? I gather it´s a continuous hum? I had
    Posted to The Workbench (Forum) by Weebyx on Sun, Apr 16 2017
  • Re: Penta trimmer adjustment

    Yes, the current stabilises after approximately 5 minutes, but as I wrote, I adjusted to 30 after 2 minutes if I remember correctly. They work just fine, and does not get hot, even when playing loud for some time. I just need to figure out why one has a "loud" hum that is noticeable during low volume. thats where the new oscilloscope comes in:) I will do a measure during next week, and let you know what it stabilises on. I bought the kit from Dillen and everything fits perfectly. But..
    Posted to The Workbench (Forum) by Weebyx on Sun, Apr 16 2017
  • Re: Penta trimmer adjustment

    [quote user="Bram"] Hello Jacob, let´s try and help each other out then! What is the top voltage you see and after how long? When it´s rising do you notice any alteration when turning R59? Because I do not notice a controlled drop or rise. Then again, so far I´ve been pulling the plug when it reaches +50 mV for fear of fireworks. I´ll have a look what´s happening with the NTC first. Greetings, Bram , the Netherlands. [/quote] In mine the NTC is pressed to the
    Posted to The Workbench (Forum) by Weebyx on Sat, Apr 15 2017
  • Re: Penta trimmer adjustment

    [quote user="Bram"] That´s the same point in the circuit: between emitter TR27 and R103 over to between R104 and emitter TR32. I´m going over the print right now and check all soldering, traces and connections. All transistors are well connected to the cooling body with new paste. What I didn´t understand is how the NTC resistor is supposed to make good contact with the cooling body, it´s slightly away from the body, and the plastic "flap" from the PCB
    Posted to The Workbench (Forum) by Weebyx on Sat, Apr 15 2017
  • Re: BeoTool - Inconsistencies found ?

    [quote user="Hiort"][quote user="Weebyx"] A reboot from no power, fixes the issue. I have seen this many times in BeoTool, sometimes it helps just closing the app totally and opening again, but this morning both A6 and Moment showed the error, and could not "see" each other. I will see if it keeps happening, and report it if it does. /Jacob [/quote] I've had the same problem. Restarted my router and everything was fine again. Think there are multiple things that
    Posted to General Discussion & Questions (Forum) by Weebyx on Wed, Apr 5 2017
Page 1 of 59 (588 items) 1 2 3 4 5 Next > ... Last ยป | More Search Options