Problem with leach amp - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 8th June 2005, 02:10 PM   #1
AudioG is offline AudioG  Italy
diyAudio Member
 
Join Date: Nov 2003
Location: rome
Angry Problem with leach amp

Hello,
I have buid two leach ampli with pcb V4.5.
I have a strange problem only on one of two leach low tim ampli:
if I connect only the central pole of input plug from preampli or BF generator, in the input stage something smokes, and the fuse of V+ blows (4A delayed), there is a very high oscillation, not audible but so strong to break a loudspeaker used for test.
After changing the blowed fuse the ampli works!
This only in a channel!

I need some help.

Thank's

Giuseppe
  Reply With Quote
Old 8th June 2005, 02:40 PM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
the general rule is do not change plugs with the equipment live and/or connected to the speakers.
But almost everyone does it even me.
RCAs are a very bad design simply because they allow live before ground connection, XLR and DIN do not allow this.
Have a look at the impedance of the input stages and connections to ground in case there is an error here.
Someone with RF experience might give some pointers with regard to rectification of ultrasonics in the first semiconductor.
__________________
regards Andrew T.
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Leach amp treble problem fabix Solid State 5 19th February 2009 01:40 PM
possible leach problem?? rtate Solid State 7 23rd October 2008 04:35 PM
Leach amp problem Curioprop Solid State 95 1st September 2008 09:58 AM
problem with leach amp xxsmiffxx Solid State 5 25th February 2005 07:50 PM
Leach amp problem Ed LaFontaine Solid State 3 19th July 2004 12:04 AM


New To Site? Need Help?

All times are GMT. The time now is 02:47 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2