Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

Comments for Capacitor Identification

Current Discussion: Main discussion

  1.   #1
    rayma's Avatar
    diyAudio Member
    It's doubtful that a 22pF capacitor is part of the RIAA network, but COG ceramic capacitors are good enough for audio.
    Do you have a link to the schematic?
     
  2.   #2
    oltern8's Avatar
    diyAudio Member
    Hi

    Thanks for the reply. Here's the relevant page of the schematic. It's not on the web as far as i know. If you want i can send you the complete schematic it's too big to upload here in its entirety.

    I was under the impression that ceramics were a big no no especially in place that have such a bearing on the overall sound of a circuit.

    I thinks I might have solved my initial issue with the brightness by installing a NE5532 in place of the op amp responsible for the riaa amplification. I know its not really a suitable alternative as far as the data sheet info says but sounds a hell of a lot better.

    thanks for you help

    oli
    [image]SDOC2537 (dragged).pdf|thumb[/image]
     
  3.   #3
    rayma's Avatar
    diyAudio Member
    [QUOTE=oltern8;4041480]

    I thinks I might have solved my initial issue with the brightness by installing a NE5532 in place of the op amp responsible for the riaa amplification. I know its not really a suitable alternative as far as the data sheet info says but sounds a hell of a lot better.

    thanks for you help

    oli[/QUOTE]

    That's not an RIAA stage, just a 1.5 times gain stage. The 22pF/33Ohm feedback parts are a stability compensation network.
     
  4.   #4
    oltern8's Avatar
    diyAudio Member
    thanks I have found the riaa network on the schematic and it makes more sense although i haven't seen one like this before. the cartridge is loaded at 56k so that probably is contributing to the bright sound.

    thanks for your help.

    oli
     
  5.   #5
    rayma's Avatar
    diyAudio Member
    [QUOTE=oltern8;4042133]thanks I have found the riaa network on the schematic and it makes more sense although i haven't seen one like this before. the cartridge is loaded at 56k so that probably is contributing to the bright sound.[/QUOTE]

    You might also need some shunt capacitance, check the cartridge specs.
     
Moderation Tools (0)
    ".(($imodtools['canapprove']) ? ("
  • ") : (""))." ".(($imodtools['canunapprove']) ? ("
  • ") : (""))." ".(($imodtools['candelete']) ? ("
  • ") : (""))." ".(($imodtools['canundelete']) ? ("
  • ") : (""))." $template_hook[vw_inlinemod_comments]
  •  
Hide this!Advertise here!

New To Site? Need Help?

All times are GMT. The time now is 01:36 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 9.68%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
"Wiki" powered by VaultWiki.
Wiki