HK6350 tuning ?

Smoke Screen · 27th June 2011, 08:10 PM

Hi
I recently got me a HK6350R amp in good shape and fully working order.
It sounds sweet with CD or Tuner but somehow a bit underwhelming with
phono as source. I checked the MC-Input and the MM-Input with Step-Up.
(cart DV23RS/II,step-up DV6X).
Probably i can better it by changing the lytics with better ones and also
remove all parts inside the boxes with (G),(GB) on it.

Am i on the right track here ?

Advise is very welcome. Thanks.

nigelwright7557 · 27th June 2011, 08:32 PM

Its the electrolytics that age.
Can have as little as specced 1000 hours lifespan.

Smoke Screen · 10:52 AM

Yes well,that much i figured.
The thing is ,as i mentioned, the parts in the boxes on the
schematics. I just wanna ask if they possibly influence the
sound and can i safely remove them.
I have the german model of the amp (G,BG) and compared to
the US-Model additional components are placed everywhere.
Especially in the phonoeq.
Im not a experienced DIYer and thats the reason why i seek
advise here.

Smoke Screen · 30th June 2011, 10:40 PM

C`mon ppl. Over 50 views and only one reply ??

No one a clue ?

nigelwright7557 · 30th June 2011, 10:45 PM

Quote:

Originally Posted by Smoke Screen

C`mon ppl. Over 50 views and only one reply ??

No one a clue ?

I have already pointed to the most likely culprit.
Electronic components like diodes, transistors etc dont wear out.

Smoke Screen · 30th June 2011, 10:56 PM

Have you even looked at the schematics ?
I made a more specific question. For that im
looking for a answer.

nigelwright7557 · 30th June 2011, 10:59 PM

Quote:

Originally Posted by Smoke Screen

Have you even looked at the schematics ?
I made a more specific question. For that im
looking for a answer.

The link is broken to your schematic.

Smoke Screen · 30th June 2011, 11:27 PM

Quote:

Originally Posted by nigelwright7557

The link is broken to your schematic.

Nope,just rightclick and "open in new tab" than max the pic

nigelwright7557 · 30th June 2011, 11:35 PM

My answer is still the same, swap out electrolytics and test it again.

If it still doesnt sound right then there must be a fault or a design fault.

Smoke Screen · 30th June 2011, 11:53 PM

Well,in addition i think i can get safely rid of
all those inductances,resitors and caps that
were added in the german model (named G,BG)
and change the resistors before the input FET
to the original values.
All those parts in the signal path cant be healthy.

I realy dont think there is a design fault in the
original design which is the US-Version.

27th June 2011, 08:10 PM	#1
Smoke Screen diyAudio Member Join Date: Jun 2006	HK6350 tuning ? Hi I recently got me a HK6350R amp in good shape and fully working order. It sounds sweet with CD or Tuner but somehow a bit underwhelming with phono as source. I checked the MC-Input and the MM-Input with Step-Up. (cart DV23RS/II,step-up DV6X). Probably i can better it by changing the lytics with better ones and also remove all parts inside the boxes with (G),(GB) on it. Am i on the right track here ? Advise is very welcome. Thanks.

27th June 2011, 08:32 PM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	Its the electrolytics that age. Can have as little as specced 1000 hours lifespan. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

28th June 2011, 10:49 AM	#3
Smoke Screen diyAudio Member Join Date: Jun 2006	Yes well,that much i figured. The thing is ,as i mentioned, the parts in the boxes on the schematics. I just wanna ask if they possibly influence the sound and can i safely remove them. I have the german model of the amp (G,BG) and compared to the US-Model additional components are placed everywhere. Especially in the phonoeq. Im not a experienced DIYer and thats the reason why i seek advise here. Last edited by Smoke Screen; 28th June 2011 at 10:52 AM.

30th June 2011, 11:35 PM	#9
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	My answer is still the same, swap out electrolytics and test it again. If it still doesnt sound right then there must be a fault or a design fault. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

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30th June 2011, 10:40 PM	#4
Smoke Screen diyAudio Member Join Date: Jun 2006	C`mon ppl. Over 50 views and only one reply ?? No one a clue ?

30th June 2011, 10:56 PM	#6
Smoke Screen diyAudio Member Join Date: Jun 2006	Have you even looked at the schematics ? I made a more specific question. For that im looking for a answer.

30th June 2011, 11:53 PM	#10
Smoke Screen diyAudio Member Join Date: Jun 2006	Well,in addition i think i can get safely rid of all those inductances,resitors and caps that were added in the german model (named G,BG) and change the resistors before the input FET to the original values. All those parts in the signal path cant be healthy. I realy dont think there is a design fault in the original design which is the US-Version.

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