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Old 22nd June 2011, 06:01 PM   #161
Itsmee is offline Itsmee  England
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Quote:
Originally Posted by Cassiel View Post
Just to clarify: I have a ZETEX ZRA6045F in the PS. I only "need" the CL-60 fron PS to chassis ground. I was hoping to finish this beast before weekend - I don't want to order one. Can I use a resistor instead?

* Not in the best mood for silly jokes. Damn, I hate chassis work.
Yes, any value between 10 & 100R, put a capacitor in parallel with it.

Some prefer to use anti-parallel diodes - use a bridge rectifier, short the + & - pins together, connect one AC pin to 0V and the other AC pin to chassis.
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Old 22nd June 2011, 06:08 PM   #162
Cassiel is offline Cassiel  Libya
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Thanks!
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Old 22nd June 2011, 06:22 PM   #163
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what type of wire did you use from the mosfets to the PCB board? My construction technique is similar to yours
I used silver wire diameter of 0.8 cm

Cāble Nu Argent-Or-Cuivre - Cāble Pur Argent 99.999% 0.8mm
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Old 22nd June 2011, 07:51 PM   #164
Cassiel is offline Cassiel  Libya
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Thanks for the info Alberto. Erm...just another question (), the thermal grease between the mosfet and the mica or between the mica and the heatsink?

I will post pics of the amp next week if all goes well.
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Old 22nd June 2011, 08:09 PM   #165
Zen Mod is offline Zen Mod  Serbia
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grease :

between mosfet and mica

and

between mica and htsnk
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Old 22nd June 2011, 08:48 PM   #166
Cassiel is offline Cassiel  Libya
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I see, everything well lubricated. Game on!

Looking forward to your fugly comment.
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Old 22nd June 2011, 09:11 PM   #167
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the feast of grease!

The thermal paste used to fill all the micropores
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Old 22nd June 2011, 09:39 PM   #168
tinitus is offline tinitus  Europe
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if youwant to see how much(or little) grease you need, mount one up, and dismantle again, carefully
you should be able to if there are air 'pockets'
but I think the rule of 'less is more' counts
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Old 1st July 2011, 12:43 PM   #169
Cassiel is offline Cassiel  Libya
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I will post pics of the amp next week if all goes well.
Blowing fuses left and right! Some blow themselves up, others see a bright white light before dying. No shorts and my bridges are OK, it's got to be the solid state relay. Do these things blow fuses when testing the power supply unloaded? Should I load the power supply and see what happens? HELP!

The SSR is old and can't find data but it was working allright. Input says 240VAC and 'CONTROL' says 80-280VAC. It was workimg in an amplifier fitted with a 35-0-35 torodial. Should I get rid of this and buy CL-60's? It is OK to test the amp with no inrush current limiters for a couple of weeks? HELP!
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Old 1st July 2011, 12:52 PM   #170
AndrewT is offline AndrewT  Scotland
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use a bulb tester for all mains power ups while you are still experimenting with any mains powered project.
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