Trio Ka1500 Amplifier

big jim · 10th May 2006, 03:52 PM

I need a service manual for this amplifier

can any one help

thanks

Nigel Goodwin · 11th May 2006, 08:32 AM

Is it not a UK model?, we used to be a Kenwood/Trio dealer but I don't have a manual for it, nor do I remember that number?.

latala · 11th May 2006, 11:30 AM

It is a uk model !!
I have sold many of them in the late 70s early 80s
As i remember it was completly unexceptional.
Nothing good nothing bad I felt that Trio lost there way at this time
I was just around the time that Trio stopped using BHMorriss and co And imported Direct.
It was a very simple device
Regards Trev

Nigel Goodwin · 11th May 2006, 11:41 AM

It might predate us as a Kenwood/Trio dealer than?, personally I've still got a KA660, a great amp!.

Leolabs · 11th May 2006, 03:37 PM

Any problem with it???

big jim · 20th May 2006, 06:50 AM

Thanks all ive repaired the amplifier the fault was
the out put transistors 2sb595 and 2sd525
i need the circuit so that i can set up the bias ive set it
at 15mv across the 0.47R emitter resistor 30ma

i would just like to sure

thanks big jim

latala · 20th May 2006, 02:59 PM

Thats about right
i assume you have given it time to settle down.
i normally give the amp a bit of driving first so that the sinks are warm to the touch and then adjust the bias
Dont get me wronge re my earlier comments they were a good value for money amp!
Just nothing over special !!!
regards Trev

Nigel Goodwin · 20th May 2006, 07:32 PM

Quote:

Originally posted by big jim
Thanks all ive repaired the amplifier the fault was
the out put transistors 2sb595 and 2sd525
i need the circuit so that i can set up the bias ive set it
at 15mv across the 0.47R emitter resistor 30ma

i would just like to sure

thanks big jim

Advantage of a stero amp, you can always check what the other channel is set to - on the assumption that one might still be correct?.

ZionRootical · 4th July 2007, 01:35 PM

Nigel
Do you have a manual for Trio KA660

I shipped my stuff from England, Trying to Fix my amp.

ps could you tell me more on my amp? ie year.

I got given it by my brother.

Snow83 · 12th January 2008, 03:17 PM

Hi guys,

if someone has this service manual (Kenwood KA 660), please be so kind and send it also to me.

thanks in advance!!!

10th May 2006, 03:52 PM	#1
big jim diyAudio Member Join Date: Feb 2006 Location: london	Trio Ka1500 Amplifier I need a service manual for this amplifier can any one help thanks

11th May 2006, 08:32 AM	#2
Nigel Goodwin diyAudio Member Join Date: Jul 2005 Location: North Derbyshire	Is it not a UK model?, we used to be a Kenwood/Trio dealer but I don't have a manual for it, nor do I remember that number?. __________________ Nigel Goodwin

11th May 2006, 11:41 AM	#4
Nigel Goodwin diyAudio Member Join Date: Jul 2005 Location: North Derbyshire	It might predate us as a Kenwood/Trio dealer than?, personally I've still got a KA660, a great amp!. __________________ Nigel Goodwin

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11th May 2006, 11:30 AM	#3
latala diyAudio Member Join Date: Feb 2006 Location: staffordshire	It is a uk model !! I have sold many of them in the late 70s early 80s As i remember it was completly unexceptional. Nothing good nothing bad I felt that Trio lost there way at this time I was just around the time that Trio stopped using BHMorriss and co And imported Direct. It was a very simple device Regards Trev

11th May 2006, 03:37 PM	#5
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Any problem with it???

20th May 2006, 06:50 AM	#6
big jim diyAudio Member Join Date: Feb 2006 Location: london	Thanks all ive repaired the amplifier the fault was the out put transistors 2sb595 and 2sd525 i need the circuit so that i can set up the bias ive set it at 15mv across the 0.47R emitter resistor 30ma i would just like to sure thanks big jim

20th May 2006, 02:59 PM	#7
latala diyAudio Member Join Date: Feb 2006 Location: staffordshire	Thats about right i assume you have given it time to settle down. i normally give the amp a bit of driving first so that the sinks are warm to the touch and then adjust the bias Dont get me wronge re my earlier comments they were a good value for money amp! Just nothing over special !!! regards Trev

4th July 2007, 01:35 PM	#9
ZionRootical diyAudio Member Join Date: Jul 2007	Nigel Do you have a manual for Trio KA660 I shipped my stuff from England, Trying to Fix my amp. ps could you tell me more on my amp? ie year. I got given it by my brother.

12th January 2008, 03:17 PM	#10
Snow83 diyAudio Member Join Date: Jan 2008	Hi guys, if someone has this service manual (Kenwood KA 660), please be so kind and send it also to me. thanks in advance!!!

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