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Showing related tags and posts for the The Workbench forum. See all tags in the site
  • B&O amplifier performance.

    Many Beoworlders spend a lot of hours and money refurbishing the classic B&O products. The normal “test” of all the effort is a listening to the sound quality, which is really ok and always needed. Have you ever considered being able to measure the specifications and compare the specifications...
    Posted to The Workbench (Forum) by classic on Sat, Nov 3 2012
    Filed under: Classic Audio
  • Re: B&O amplifier performance.

    To day I have finish building this 3.rd. gen. interface / buffer and I have been testing the result. I am really very happy about what i have gained by this new updated build. All the specifications of the test equipment have been improved quit considerable and my test of the classic B&O products...
    Posted to The Workbench (Forum) by classic on Sat, Nov 3 2012
    Filed under: Classic Audio
  • Re: B&O amplifier performance.

    [quote user="Step1"] This is very interestiing Frede and I for one would love to be able to measure equipment that I am working on without the worry of old equipment being out of spec :-) Tell us more please! BTW Have you considered software based wow & Flutter measurement? Would be superb...
    Posted to The Workbench (Forum) by classic on Sun, Nov 4 2012
    Filed under: Classic Audio
  • Re: B&O amplifier performance.

    I have received a few questions regarding "what can be measured" with the soundcard and soundcard buffer ? This is the parameters: (I know because this is the parameters I am measuring on costumers products when I perform a full restoration) FM receiver Sensibility Frequency range Signal/Noise...
    Posted to The Workbench (Forum) by classic on Wed, Nov 21 2012
    Filed under: Classic Audio, Soundcard buffer
  • Re: Beogram 1000 trouble

    I managed to get a Beogram 1001 which was sold for parts, but to my horror it had no counterweight either when it arrived :( So once again I am asking. Does anyone have a Beogram 1000 or anything else with the ST/L-15 pickup who could measure and weigh the counterweight for me?! Or if anyone has a spare...
    Posted to The Workbench (Forum) by lax on Wed, Mar 13 2013
    Filed under: beogram, Classic Audio
  • Re: B&O amplifier performance.

    [quote user="sonavor"] This is odd to me. Applying my nice 2.29mV, 1k Hz sine wave to the phono input of the RIAA amp board, I get a clean 1k Hz sine wave amplified to around 150mV whether measured from the RIAA output RCA jacks on the front of the Audio Tester or from the RCA output jacks...
    Posted to The Workbench (Forum) by classic on Mon, Apr 22 2013
    Filed under: Classic Audio
  • Re: B&O amplifier performance.

    The capacitor C3 = 4.7nF in the RIAA circuit (it looks like during the different drawing versions I have made an error and used the value 47nF) I am really sorry for all your work by finding the reason for the problems of getting 40dB gain. I found out the error by going all the way back to my simulation...
    Posted to The Workbench (Forum) by classic on Mon, Apr 22 2013
    Filed under: Classic Audio
  • Re: stereo spread unit beolab 5000

    Hello Florian, (I have sent you this PM) I have attached 2 files for you. That should explain most of your questions. There are 2 versions of the Stereo Spread Unit. The transformer is there because of the special design of the Beolab 5000 output stages. The center tab for speakers can give you 120 watt...
    Posted to The Workbench (Forum) by classic on Mon, May 27 2013
    Filed under: Classic Audio
  • New caps needed for Beolab 1700 - Help

    Hi, I am looking for some new caps for my beolab 1700 as mine are swollen and leaking and the output sound is all distorted on one channel and the heatsink is running really hot. Juat wondering if anyone knows what values I will need or if any kits are available for this model. Many Thanks, Lewis
    Posted to The Workbench (Forum) by Lewis T on Fri, Dec 27 2013
    Filed under: Vintage Beomaster, Repair, Classic Audio, blown, capacitors, beolab 1700, vintage
  • Re: Beolab 5000 Amplifier Mexico

    Søren, a small advice...... We have recenly seen a number of the "black cap" small signal transistor (Fairchild origin as far as I remember) failing. The problem we have seen is periodic noise. I recommend to replace all of them. /Frede
    Posted to The Workbench (Forum) by classic on Tue, Sep 29 2015
    Filed under: Classic Audio
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