Schematics for H&K ATS60

[Sebamp]

Hello

I am new in this forum and I must say it is one of best forum.
I have a problem with that amplifier through preamplifier. I am very happy with this amplifier (when working), but I have problems with the clean stage. They have a noise and I do not know what is wrong. I am electrical and I want to get to the end of the case itself. I asking you for the scheme. Excuse my English, I come from Slovenia.

Best regards and thank you
Sebastjan

If need my mail addres, is sebalicen@gmail.com

[Sebamp]

Hello

In poste Hughes / Kettner Edition Blue 60-R, the Enzo has offered to scheme ATS60. Enzo, would be very happy if you could send a diagram. Enzo nice please. I found a mistake at the final stage and not on the clean channel as I thought. I disconnected the capacitors (1uF/63V), after which the signal and is connected to the mass. In any case, amp have hum.

Best regards
Seba

[Enzo]

Is there some other name for this amp? I do not see ATS60 in my files.

I see that I posted that, but I can;t find it.

[Robert M. Martinelli]

Hi Enzo,
sorry for having to "resuscitate" from the dead this thread, but I got one of these amps on the bench right now, and having the schematics handy could spare me some time...

The full name of the amp was ATS Sixty (in letters, not numbers, could this be the reason you don't find it in your files?).

AFAICR, ATS stood for Advanced Tube System, I think this was one of the first modern SS amps sporting an ECC83 in the preamp section, long before the valvestate series saw the light...

BTW, the thing has a MOSFET power amp and a toroidal PT, and it looks like the solder joints are all done by hand...A very well built piece of equipment IMHO...I remember trying one out say, 20 or more years ago and I was really impressed by the way it sounded.

Thanks in advance

Bob

[Jazz P Bass]

H&K ATS Sixty Service Manual

Here it is.

[Robert M. Martinelli]

My tired eyes and brain thank you wholeheartedly, JPB!

Cheers

Bob

Edit:seemed to me the power amp had MOSFETS in it, while in fact it has a complementary BJT pair (TIP142/147)...my bad (eyes?)

[Robert M. Martinelli]

seemed to me the power amp had MOSFETS in it, while in fact it has a complementary BJT pair (TIP142/147)...my bad (eyes?)

....It's unfortunately more than bad eyes....my memory, too, starts failing me...After opening the thing I realized it's completely different from the amp I remembered...no toroidal PT either...after squeezing my few neurons and synapses hard for a while, I realized I mistook this amp for another (older) H&K model I tried and worked on in the '80s which was a 50W one, indeed had a two-tube preamp section and a MOSFET power stage, and sounded terribly good, at least to my ears....possibly an H&K Fifty?

Hope my eyes and memory are the ONLY things that are failing me...

Cheers

Bob

[Davidakosa]

Hello.

I can't download the schematic.

I have one of this with the fuse and a little resistor near to TIP147 burn

How can I download?

Thanks

[Jazz P Bass]

Here it is.

[Jazz P Bass]

I have one of this with the fuse and a little resistor near to TIP147 burn

Resistors rarely burn up by themselves.

You had best check the TIP transistors for shorts.