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Seca23 View Drop Down
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    Posted: 08 September 2022 at 3:56pm
The amp has 5 pairs of sk176 /sj56 per channel.

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EmPro View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EmPro Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2022 at 3:30pm
I'll look when i get home,maybe i still have some HH V series schematics to see,and bias depends of what outputs you have and number of them....Hitachi's are different from SML or Exicon,if you bias sml-s of exicon-s like hitachi-s they will blow up in 10min.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Seca23 Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2022 at 3:22pm
I can't find the test points and I don't know the corect value for bias
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EmPro Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2022 at 3:18pm
That is a common problem caused by leaky or dryed capacitors in driver board,always replace them with new ones and your problem will dissapear 100%,for bias and dc adjustments you should have trimmers (2 for each ch) with reference points for bias values Smile as far i remember from my old VX900.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Seca23 Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2022 at 3:09pm
Hi!
I need some help with a HH Vx1200 amp
Both the clip lights stay on, one gets a little dimmer after a few seconds after turning it on.
I already changed the lm339n comparator but it made no difference
The amp is working ok, it doesn't sound distorted at all.
Another problem is when i turn it off it makes a squeaky noise for a few seconds on both channels.
These problems apeared suddenly, it was working perfectly before.
I would also like to know the procedure for adjusting bias and dc offset

Thank you! 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EmPro Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2022 at 5:22am
Cheers
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djkeet Quote  Post ReplyReply Direct Link To This Post Posted: 20 July 2022 at 10:25pm
Originally posted by EmPro EmPro wrote:

Originally posted by djkeet djkeet wrote:

Originally posted by EmPro EmPro wrote:

i couldn't save the original inscription on the front panel as it was way to rusty....right ch was dead (outputs blown) left ch working,now is fully working :) Old School Cloud GS 3002


I like how the case turned out did powder coat it or what spray did you use?


Black spray for cars mate :) from B&Q.



Cheers
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EmPro Quote  Post ReplyReply Direct Link To This Post Posted: 20 July 2022 at 7:12am
Originally posted by djkeet djkeet wrote:

Originally posted by EmPro EmPro wrote:

i couldn't save the original inscription on the front panel as it was way to rusty....right ch was dead (outputs blown) left ch working,now is fully working :) Old School Cloud GS 3002


I like how the case turned out did powder coat it or what spray did you use?

Black spray for cars mate :) from B&Q.


Edited by EmPro - 20 July 2022 at 7:13am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djkeet Quote  Post ReplyReply Direct Link To This Post Posted: 19 July 2022 at 11:57pm
Originally posted by EmPro EmPro wrote:

i couldn't save the original inscription on the front panel as it was way to rusty....right ch was dead (outputs blown) left ch working,now is fully working :) Old School Cloud GS 3002


I like how the case turned out did powder coat it or what spray did you use?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EmPro Quote  Post ReplyReply Direct Link To This Post Posted: 19 July 2022 at 8:15pm
One of my 6 saved HH M900 this one was the worse:


Edited by EmPro - 19 July 2022 at 8:17pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EmPro Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2022 at 5:08pm
When driver boards blows up on Citronic Conquest V12:

I made this immortal lateral mosfet amplifier two years ago...still going strong and for sure i will die old and this amp will still play no problem LOLLOL not the best of my designs btw,i was just bored that time and i loved the case and heatsinks of this Citronic way to much to throw them away Big smile and yeah...the funny part is that i set the dual fan cooling sistem always on,i ask myself even today why the f_ck i even done that LOLLOL


Edited by EmPro - 01 July 2022 at 5:26pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EmPro Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2022 at 3:48pm
Originally posted by shaun1264 shaun1264 wrote:

As I've already mentioned I'll be putting a fan in. 

Perfect :D but...where you planning to put it? as his space now is full with that transformer Confused you need to find a different place for the transformer...as the fan needs to be in the same place...Confused
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