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Old 10th December 2010, 08:55 PM   #81
Tea-Bag is offline Tea-Bag  United States
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Ignore that. The BC517 worked better than BC546 originally there, we had to occasionally add that cap there to avoid the startup relay from ocilllating.
So 4 100uf caps for Power supply , 1 for relay cap.
The board is labeled correctly for all needed parts.
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Old 10th December 2010, 08:58 PM   #82
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Thanks, I thought I was going mad.
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Old 10th December 2010, 09:23 PM   #83
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Originally Posted by Salas View Post
Its all ready there for you. There is 12V supply on board -connected as it should, you do nothing- and there are 1...6 positions for the steps pins and gnd for the switch's output pin. Half a stereo switch does the trick.
The other half for input identification via leds...
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Old 16th December 2010, 01:18 PM   #84
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Actually it's still not clear to me as well how to connect the input selector. I have 7 pins. What do I have to connect to the common pole of the selector ?

I fired today for the first time the board. Everything looks good. I have one rail a bit lower than the other. Additionally 0.1 mV DC offset on one channel and 1.8mV on the second channel. Is it normal ?

Thanks,

Davide
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Old 16th December 2010, 02:47 PM   #85
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Davide
It looks like congratulations are in order. Your offset is wonderful. I think one rail actually is supposed to be lower than the other but by how much I dont recall.
Uriah
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Old 16th December 2010, 02:58 PM   #86
khaho is offline khaho  Finland
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Originally Posted by Nikon1975 View Post
Actually it's still not clear to me as well how to connect the input selector. I have 7 pins. What do I have to connect to the common pole of the selector ?
There is text beside the pin row, SELECTOR 1,2,3,4,5,6,GND.

So the pin closest to the text is GND and connecting it to the 1,2,3,4,5,6 pins will drive the corresponding relay.

Hopefully this helps.
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Old 16th December 2010, 08:18 PM   #87
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Quote:
Originally Posted by Nikon1975 View Post
Actually it's still not clear to me as well how to connect the input selector. I have 7 pins. What do I have to connect to the common pole of the selector ?

I fired today for the first time the board. Everything looks good. I have one rail a bit lower than the other. Additionally 0.1 mV DC offset on one channel and 1.8mV on the second channel. Is it normal ?

Thanks,

Davide
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Old 17th December 2010, 12:33 AM   #88
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Quote:
Originally Posted by khaho View Post
There is text beside the pin row, SELECTOR 1,2,3,4,5,6,GND.

So the pin closest to the text is GND and connecting it to the 1,2,3,4,5,6 pins will drive the corresponding relay.

Hopefully this helps.
It does. :-)

Thanks,

D.
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Old 19th December 2010, 05:37 PM   #89
Horio is offline Horio  United States
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Originally Posted by Tea-Bag View Post
Horio,
Let me correct myself first, it's the first cap that gets replaced, not the second.
Technically I am not positive what the differences are. Both are bypass caps for the IRFP Voltage Reference. The film cap seems to offer better sound. I would buy both and try both.
Tea-Bag

I'm getting ready to solder in the caps, and wanted to make sure I put the 0.1uF cap in the right spot. I should be replacing the two 100uF caps closest to the Vref LED strings (5 LEDs) for hot-rod?
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Old 19th December 2010, 09:59 PM   #90
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Yes. I just looked at the boards.
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