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Old 29th November 2013, 11:09 PM   #10691
Turbon is offline Turbon  Sweden
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I'm a bit worried that the sinks rests on the circuit prints... There is only the laquer between. I'm thinking on puting something between just to be sure.
Any thoughts about this?
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Old 29th November 2013, 11:28 PM   #10692
Salas is online now Salas  Greece
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Better solder its legs when half mm before rest than using something that will possibly become a mess trapped in heat over the long run. Use paper spacer and then pull it out or something clever to create a tiny gap before soldering it steady. Its only at the edges over some traces, but if it will ease your mind take care of it. The legs are heavy and the load is light, no way it will go anywhere. 2mm thick board eyelets root it well.

But no problems in the tests when resting normally so far.
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Old 30th November 2013, 06:48 AM   #10693
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Quote:
Originally Posted by Salas View Post
Better solder its legs when half mm before rest than using something that will possibly become a mess trapped in heat over the long run. Use paper spacer and then pull it out or something clever to create a tiny gap before soldering it steady. Its only at the edges over some traces, but if it will ease your mind take care of it. The legs are heavy and the load is light, no way it will go anywhere. 2mm thick board eyelets root it well.

But no problems in the tests when resting normally so far.
You are probably right abt this. It will be steady and go nowhere.

Regards
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Old 30th November 2013, 07:47 AM   #10694
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Thanks Nick I'll go carefully.It is just the BC in the wrong position.
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Old 30th November 2013, 09:51 AM   #10695
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Hi.
Question about the LEDs.
From my Measurements I got for almost all LEDs
1.87-1.89V. I used a 9v battery (which actually supplies around 9.3) and a 1.5k ohm resistor.
Now - with these values I can't hit the targets for the 3 or 4 LEDs array .
Is it really that matters ? I guess I have an accuracy of 2-4% instead of 1-2 %
I am building the kit for MM.
Thanks
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Old 30th November 2013, 10:55 AM   #10696
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The quartets being much alike between channels is the priority. Not the absolute value Vs 7.75V ref. 7.5-7.8V ref is good for bias. 5.6-5.9V ref for the triplets is good too.
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Old 30th November 2013, 12:46 PM   #10697
Marra is offline Marra  United Kingdom
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I replaced the BC560 and put the new one in the right position;unfortunately no change.With the bulb tester connected the p/s voltage drops to 24v and the 15R resistor gets hot.No led's light up.Here's where I wish my diagnostic skills were better.
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Old 30th November 2013, 01:17 PM   #10698
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Start from the DC input. First to bias the 9610 CCS are the LEDs triplet. See if you can make them shine one by one with DMM in diode mode (confirm it has the ability on a new LED first) or with the battery and resistor. One or more may be dead from a hot iron or reversed?
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Old 30th November 2013, 01:20 PM   #10699
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See if the (-) probe to LEDs that they will shine one way or another is on a square pad as it should.
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Old 30th November 2013, 02:58 PM   #10700
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Oh s--t it would seem I don't know my a--e from my elbow as they say around here.Only 16 led's to unsolder and reinsert after checcking
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