HELP !!! >>>> Trio KA-400 , Parts needed ? <<<<HELP

[Audio Al]

Some of you may remember my non working amp

http://theartofsound.net/forum/showt...highlight=Trio

Today I decided to try and fix it

The problem was blowing fuses on power up

Tonight I un soldered the 12 pins from the main board connecting the output transistors , slightly bent the pins away , Fitted 2 new fuses powered it up and no more blown fuses

I now need too locate two pairs of these

IMG_2761.jpg

Any ideas where I can buy these ?

[Audio Al]

Now found on ebay Germany

161068241923

[Firebottle]

Fortunately not a lot of money Al.
Before you put them in just check it is the transistors that are at fault.
Wouldn't want the new ones to blow up

Run your multimeter on ohms over the old ones, if you find some very low readings then they are definitely shot.

Alan

[istari_knight]

As predicted

I would strongly advise also checking Q13,Q14,Q15 & Q16. They are the driver transistors, if they are short circuit your new transistors will instantly die on power up. If you're not sure how to test transistors this explains better than I could.

Good luck & don't forget to renew the thermal compound when fitting replacement outputs.

[Audio Al]

As predicted

I would strongly advise also checking Q13,Q14,Q15 & Q16. They are the driver transistors, if they are short circuit your new transistors will instantly die on power up. If you're not sure how to test transistors this explains better than I could.

Good luck & don't forget to renew the thermal compound when fitting replacement outputs.

This is getting more technical my head hurts

[istari_knight]

You're welcome to send it down for a Cornish holiday & I'll sort it out... Might not be worth the courier fee's though ?