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

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Sonic Frontiers SFP-1 Sudden Noise on MC Input
Sonic Frontiers SFP-1 Sudden Noise on MC Input
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
Reply
 
Thread Tools Search this Thread
Old 4th November 2018, 07:00 PM   #11
ralphfcooke is offline ralphfcooke  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Not sure what other component changes would have to be made, but the lsk170 is often chosen for low noise front ends.
  Reply With Quote
Old 16th January 2019, 07:53 PM   #12
artosalo is offline artosalo  Finland
diyAudio Member
 
artosalo's Avatar
 
Join Date: Feb 2010
I am repairing Sonic Frontier Phono 1 from year 1997 and looking for the schematics.
I have noticed the schematics from the earlier discussions, but these seem to be from 1993 and are different.
Most urgently I need the schematics of the power supplies, so if anyone have, I would be grateful.
  Reply With Quote
Old 17th January 2019, 04:02 AM   #13
Boydk is offline Boydk  Denmark
diyAudio Member
 
Join Date: Feb 2010
Location: Aarhus, Denmark
Was wondering. When you switch between MC and MM (the cathode resistors)... I presume this is done by a relay...... Could it be something as stupid as a bad contact in the relay/switch????
  Reply With Quote
Old 17th January 2019, 05:05 AM   #14
ticknpop is offline ticknpop  Canada
diyAudio Member
 
Join Date: May 2005
Location: toronto
Sonic Frontiers SFP-1 Sudden Noise on MC Input
There is a resistor from the high voltage supply dropping down the voltage to the drain of 310 , thats a likely suspect.

The later SF phono stage used the quieter 2 sk147 in an epoxy cylibnder to cut down thermal drift.
  Reply With Quote

Reply


Sonic Frontiers SFP-1 Sudden Noise on MC InputHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sonic Frontiers SFP-1 Phono Stage Jebem Tubes / Valves 14 4th January 2019 02:06 PM
Sonic Frontiers SFP-1 Jempie Analogue Source 20 4th May 2018 04:08 PM
Sonic Frontiers SFP Jempie Analogue Source 0 9th January 2016 01:33 PM
Sonic Frontiers SFP-1 mods? rdf Tubes / Valves 6 24th December 2009 07:36 AM
Sonic Frontiers Jitterbug eleakist Digital Source 2 11th February 2008 05:23 PM


New To Site? Need Help?

All times are GMT. The time now is 04:02 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki