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Old 9th June 2012, 07:31 PM   #1311
Salas is offline Salas  Greece
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Quote:
Originally Posted by merlin el mago View Post
Was IR brand supplied by Mike aka Tea-Bag for the GB
Did you mount the new one by shorter legs or something changed in respect to affixing it to the sink?
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Old 9th June 2012, 07:52 PM   #1312
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Quote:
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Did you mount the new one by shorter legs or something changed in respect to affixing it to the sink?
Nothing changed only the mosfets.

Now all 4 regs with Zobel MKT+R because have less ripple.

Last edited by merlin el mago; 9th June 2012 at 07:54 PM.
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Old 9th June 2012, 07:55 PM   #1313
vgeorge is online now vgeorge  Greece
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Again, do a proper test on the mosfet you removed to be sure it was not damaged.
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Old 9th June 2012, 07:59 PM   #1314
Salas is offline Salas  Greece
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Was it replaced from the same bunch? Or bought at a different time?
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Old 9th June 2012, 08:00 PM   #1315
Salas is offline Salas  Greece
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Quote:
Originally Posted by merlin el mago View Post
Salas could you help me how to calculate the ripple? knobs: amplitud 5mV/cm & timebase 0.5us

Without bipolar BG 100uF 50V connected at the output sense + & sense- I have the same ripple, it's OK?

I have to change also the IRF610 to decrease ripple?

P.S. I'm like a boy playing with a new toy (scope)
This does not look like ripple. Looks random. As it is set, turn off the reg, to see what is residual pick up or isn't.
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Old 9th June 2012, 08:52 PM   #1316
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Quote:
Originally Posted by Salas View Post
Was it replaced from the same bunch? Or bought at a different time?
Bought a different time always supplied by Mike aka Tea-Bag
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Old 9th June 2012, 08:59 PM   #1317
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Originally Posted by Salas View Post
This does not look like ripple. Looks random. As it is set, turn off the reg, to see what is residual pick up or isn't.
I can't see any difference at the scope with or without lytic turning off the reg.
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Old 9th June 2012, 09:33 PM   #1318
Salas is offline Salas  Greece
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Its probe's and scope's environmental pickup and its own residual then. If it was from the device under test only, it should have changed much when you powered it down.
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Old 9th June 2012, 09:49 PM   #1319
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It's a good news, I changed all Vref for MKT 10uF, now I just connected the real load (NP D1 I/V stage) waiting the regs warm up to adjust voltages (Salas your regs seems a F1 race), I try to listen tonight the I/V.

Last edited by merlin el mago; 9th June 2012 at 09:51 PM.
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Old 10th June 2012, 07:37 AM   #1320
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Salas

what type resistors to use at CCS set and zobel - metal film or anything else, what brand
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