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.

The OPA627's in my VSPS have blown.
The OPA627's in my VSPS have blown.
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 10th January 2005, 11:01 PM   #1
Shoog is offline Shoog
diyAudio Member
 
Shoog's Avatar
 
Join Date: Aug 2002
Location: Eire
Default The OPA627's in my VSPS have blown.

Hi there,
I came to use my VSPS phono amp, and nothing came out. Tested the circuit and everything measures fine. Looks like the input Fets of the OPA627's have been spiked somehow, and no longer work.
We had a lightning strike recently which took out my Modem, but I don't think it was this.
My question is can I protect the input Fets with diodes without degrading those sensitive little signals ?

Shoog
  Reply With Quote
Old 11th January 2005, 12:52 AM   #2
BrianL is offline BrianL  United States
diyAudio Member
 
Join Date: Mar 2002
Location: USA
The OPA627's in my VSPS have blown.
Read the OPA627/637 datasheet and look at the section on
input protection.

If you use the external diodes and resistor, make sure the
diodes (or FETs wired as diodes) have the lowest capacitance
and flattest capacitance-vs-reverse-voltage, as well as low leakage.
__________________
bel
  Reply With Quote

Reply


The OPA627's in my VSPS have blown.Hide 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
The Phonoclone and VSPS PCB Help Desk rjm Analogue Source 4031 11th June 2018 06:05 AM
Pics of my VSPS davidfmartin Analogue Source 0 29th March 2009 02:05 AM
VSPS Help/Suggestions dsavitsk Analogue Source 4 31st October 2005 04:58 PM
Thanks, RJM! Just built a VSPS nobody special Analogue Source 2 1st August 2005 07:48 PM


New To Site? Need Help?

All times are GMT. The time now is 01:44 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki