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Harryconover
Last Activity:
Jul 26, 2017 at 5:57 PM
Joined:
Jan 30, 2017
Messages:
421
Likes Received:
49
Trophy Points:
28
Gender:
Male
Birthday:
Apr 21, 1952 (Age: 65)
Location:
Charlotte NC
Occupation:
Retired EE

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Harryconover

Active Member, Male, 65, from Charlotte NC

Harryconover was last seen:
Jul 26, 2017 at 5:57 PM
    1. Skagarack
      Skagarack
    2. Skagarack
      Skagarack
    3. Skagarack
      Skagarack
      Hi Harry, I bought Toshiba Aurex SS-810.Very very nice sounding speakers.But surrounds on bass drivers are a little bit damaged.Do you think, I can get some original surrounds somewhere?Please, could I ask you to do me a favour and take a look around your country?Maybe you know, where to buy them.Thank you very much.Jan.
      1. Harryconover
        Harryconover
        Not familiar with that type of speaker what is the diameter of the bad driver?
        Jul 24, 2017 at 8:01 PM
    4. Skagarack
      Skagarack
      1. Harryconover
        Harryconover
        Access to the crossover would be though the woofer
        Jul 18, 2017
    5. Skagarack
      Skagarack
      Many thanx, yes I will do it.The main reason of replacing R555,556 is, that the small cooler for voltage stabilizers(Q519,520) is getting very hot.I can put my finger on it for 15 seconds max.So I will try to check it again after replacing resistors.
    6. Skagarack
      Skagarack
      Ok Harry, thank you very much again, yes I will check the voltage.But after replacing those fuse resistors ( R555,R556) 10 Ohm.This is the weak point of this amp.
      Someone has replaced those two resistors and DC offset was +-10mV again and buzzing in the speakers has disappeared.
      (I´m hearing some very slight hum in both speakers.(50Hz from transformer).But I have to put my ear very close to the speaker cone).Jan.
      1. Harryconover
        Harryconover
        Good if you have a vareack run your ac up to 120 volts these is high normal , check the temp of those resistors after a hour check the temp if you have a laser type meter , perfect , if not the old put your thumb on it you should be able to stay there for 30 sec if not its tue got
        May 31, 2017
      2. Harryconover
        Harryconover
        Too hot
        May 31, 2017
    7. Skagarack
      Skagarack
      Hi Harry.Thanx a lot for your comment.Everything is ok by now.It´s going up to 20- 30mV.I put new trimmers for DC offset biasing.I think it was some bump to the trimmer before(580mV).I can´t explain this DC deviation.I´m going to change two fuse resistors, it should help to minimize offset as well.(I hope :-).But first I have to order it from some e-shop.Have a nice day.Jan.
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  • About

    Gender:
    Male
    Birthday:
    Apr 21, 1952 (Age: 65)
    Location:
    Charlotte NC
    Occupation:
    Retired EE