Why are these fuses blowing - Page 3 - 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 18th May 2004, 06:29 PM   #21
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
The PT7 devices are probably a standard device that Cyrus mark up with their own number. TIP41C have been used in many nice amplifiers and should be fine. If you wanted to go better than that you may be able to find a suitable Japanese 2SCxxxx device, but these are generally hard to find. If you buy all the transistors as I suggested you will be in for a bill of about £10.

Can you give a clue as to how the amp blew? Was it broken when you got it?
  Reply With Quote
Old 24th May 2004, 05:09 PM   #22
diyAudio Member
 
Join Date: May 2004
Location: London
I got the amp off my uncle, but apparently it worked well when he used it last (3 years ago).

Have put the amp into a shop to get repaired - as not overly confidant that I wouldn't solder the surrounding components together when replacing the transistors.

When I get it back is there any special way everything should be connected? To avoid blowing anything else?

There seems to be only one output for the speakers but my Linn Kaber LS500's have 3 left and right inputs and can be bi/tri and single wired/amped by means of shifting some plates. I only have the one amp though, so does this mean I just single wire them ie one plate over all three left and the other over all three right at each speaker?

Thanks again for all the help and advice

Darin
  Reply With Quote
Old 24th May 2004, 08:50 PM   #23
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
If it was working fine when you were given it then I think you may have damaged it by putting the amp unit fuses in I am surprised though that this did anything to the output stage, most likely it would damage the PSU capacitors and/or rectifier diodes.

To bi- or tri-wire your speakers all you need to do is join all 2/3 wires into one 4mm banana plug at the amp end. Then remove the plates on the speaker and wire the separate connections.
  Reply With Quote
Old 24th May 2004, 09:00 PM   #24
diyAudio Member
 
Join Date: May 2004
Location: London
Is that not the same as running just the one set of wires and using the plates?
  Reply With Quote
Old 24th May 2004, 09:02 PM   #25
diyAudio Member
 
Ultima Thule's Avatar
 
Join Date: Jan 2004
Location: Koskenkorva Land
Hi Darin,

I haven't red the thread very carefully but do you use slow blowing fuses marked with a "T"?

I guess you have glass tube fuses?
__________________
"If transistors are blueberries and FETs are strawberries, then tubes must be.. pears"
Michael 29th January 2010
  Reply With Quote
Old 24th May 2004, 10:02 PM   #26
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
The Cyrus amp requires fast blow (marked F) type fuses.

Quote:
Is that not the same as running just the one set of wires and using the plates?
LOL don't let any bi-wire advocates read that What did you think bi-wiring was, then?
  Reply With Quote
Old 5th June 2004, 02:09 PM   #27
diyAudio Member
 
Join Date: May 2004
Location: London
It would seem that I do not fully understand this single/bi & tri wiring.

My amp only has one set of red and black outputs for each of the left and right speakers. The Kabers have 3 sets of red and black inputs per speaker.

So from this info can I bi and tri wire with what I have? (obviously I would need more cable). If so are you saying that removing the plates and running three separate sets of wires for a speaker back into the amp ie 3 cables going into each banna plug - that I will improve the sound? It seems the same as having the plates on and running just the one set of wires as everything is connected to each other anyway.

Must remind you that I am an amatuer to all this so what may seem obvious to you is not for me.

I have recieved the Cyrus units back and its all go. The cyrus/kaber combination produces an awesome sound - I'm very impressed.

Thanks again for all the advice
  Reply With Quote
Old 6th June 2004, 08:07 PM   #28
diyAudio Member
 
Join Date: May 2004
Location: London
One other query you may be able to help with -

When the Cyrus II and the Cyrus PSX units are conected and music is coming from the speakers, if I switch both units off the sound fades after about 30 seconds. If I switch only one or the other off the music still stays the same (as long as any one of the units power switch is on). And most bizzare when I switch off and disconnect the Cyrus PSX unit completely there is no difference.

This makes absolutely no sense to me, can you explain why and what the Cyrus PSX does or is supposed to do.

Cheers
Darin
  Reply With Quote
Old 6th June 2004, 08:16 PM   #29
Geoff is offline Geoff  United Kingdom
diyAudio Member
 
Join Date: Apr 2001
Location: UK
Quote:
Originally posted by Darin P-B
This makes absolutely no sense to me, can you explain why and what the Cyrus PSX does or is supposed to do.
Yes, I can and will do so in a reply to your separate email.
  Reply With Quote
Old 7th June 2004, 05:36 PM   #30
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Quote:
So from this info can I bi and tri wire with what I have? (obviously I would need more cable). If so are you saying that removing the plates and running three separate sets of wires for a speaker back into the amp ie 3 cables going into each banna plug - that I will improve the sound? It seems the same as having the plates on and running just the one set of wires as everything is connected to each other anyway.
Indeed, you can bi- or tri-wire just with what you have, plus more cable. I'm not saying it will improve the sound, some people claim it makes a difference, that's all. Note that what you may percieve as differences to the sound by bi- or tri-wiring may actually be down to the simple fact that you have more cable capacity going to the speaker. To confirm this, leave all the cables connected and put the shorting plates on again.

Regarding the PSX, the main amp power switch is redundant when the PSX is connected. The PSX just substitues a more beefy power supply than the main amp one.
  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
Keep Blowing Fuses Whiting Tubes / Valves 9 11th September 2008 09:44 PM
Car Amp help? Fuses blowing... Tolo Car Audio 1 3rd December 2007 01:42 PM
Blowing fuses balance Tubes / Valves 2 5th March 2005 02:16 AM
blowing fuses homegrown45167 Car Audio 2 22nd October 2004 12:16 PM
The Fuses Just Keep Blowing raffir Chip Amps 19 22nd June 2003 03:49 AM


New To Site? Need Help?

All times are GMT. The time now is 08:48 AM.


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