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Is anyone building the KGSSHV? - Page 9

post #121 of 487

 

Quote:
Originally Posted by El_Doug View Post

what changed between then and now? 

 

 

 

 

It was late last night, DMM was going bonkers.

 

Channel boards are lighting up except for one LED in the same spot on both boards, hope there are not fake parts, I got 2 different batches of IXYS parts that looked completely different.


Edited by HDMan - 4/26/12 at 7:13pm
post #122 of 487

Here is a photo of my verified authentic N100D

 

(large, unresized image)

http://home.comcast.net/~drnath/diy/100d.JPG

post #123 of 487

.


Edited by HDMan - 4/26/12 at 9:23pm
post #124 of 487

Not checking the transformer outputs in isolation before powering anything...

Not testing the PSU 15 -/+ before powering the first amp board...

Testing the other amp board without finding out what was wrong with the first board...

 

PRICELESS

 

...and Richard usually supplies paperwork with specs, have you checked the data?

 

 

 

post #125 of 487

 

Quote:
Originally Posted by johnwmclean View Post

Not checking the transformer outputs in isolation before powering anything...

Not testing the PSU 15 -/+ before powering the first amp board...

Testing the other amp board without finding out what was wrong with the first board...

 

PRICELESS

 

...and Richard usually supplies paperwork with specs, have you checked the data?

 

 

 

 

Checked the Transformer, all good, 500v and 30v respectively

Checked the PSU -15 +15 = 30v all good.

Tested both at the same time, I will try 1 at a time.

 

Yes I have checked the data, correct colour matching for 240v input.

 

Tested one at a time, same thing. I know a guy with an osciliscope, lets see what we can see there.


Edited by HDMan - 4/26/12 at 10:05pm
post #126 of 487
Quote:
Originally Posted by HDMan View Post

 

Channel boards are lighting up except for one LED in the same spot on both boards, hope there are not fake parts, I got 2 different batches of IXYS parts that looked completely different.

 

Why do I have a nagging feeling it's the unnecessary LED for the IXYS current sources. tongue.gif

 

I'm just taking the piss, no hard feelings bro, best of luck. beerchug.gif

 

post #127 of 487

@dl - Good observation!

post #128 of 487

 

Quote:
Originally Posted by livewire View Post

@dl - Good observation!

 

Lol, as if.

 

Its the LED that runs off the 15v line. It comes on when powering down for 2 seconds only.


Edited by HDMan - 4/27/12 at 12:07am
post #129 of 487

Must. Resist. Urge. To. Laugh. Hysterically.

 

SO.......... are the LEDs installed the right way? Power supply polarity correct?

post #130 of 487

sachu posted:-

 

 

Quote:
there are other folks who manufacture transformers ..you do know that right? especially in australia..Why only ordering from SumR? 

I tried about 4 places in Oz and none would pot them in mumetal, and charged as much for their vanilla transformer as it cost me for SumR's premium jobs shipped here to the antipodes.

This is a no-brainer.

post #131 of 487

In way over my head here, lol.

 

It's going to the repair shop after i smelt smoke, pop crakle on one of the channel boards. Now you can luagh BEEFY. tongue_smile.gif


Edited by HDMan - 4/27/12 at 6:55pm
post #132 of 487

Waiting to hear if one of the outputs is at +450 and the other at -450 which is strictly an adjustment problem.

This condition steals enough current due to the feedback that the current source does not work.

 

The easiest way to adjust this is to set the offset pot to maximum resistance, then adjust the balance

pot so that both outputs are the same voltage. (differential)  Then measure one of them to ground

and adjust the offset pot for 0 volts.  Repeat a few times.

 

Its much easier if you adjust the pots to center before you solder them in.

 


Edited by kevin gilmore - 4/27/12 at 6:48pm
post #133 of 487
Quote:
Originally Posted by HDMan View Post

In way over my head here, lol.

 

It's going to the repair shop after i smelt smoke, pop crakle on one of the channel boards. Now you can luagh BEEFY. tongue_smile.gif


I surely wont be sending you my 009 to plug into this thing wink.gif
post #134 of 487

 

Quote:
Originally Posted by arnaud View Post


I surely wont be sending you my 009 to plug into this thing wink.gif

 

Lol, I don't think I will either.

post #135 of 487

KGSSHV: not a good first amp to build. Shocking news.

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