Re: [BUILD] 1176LN Rev D DIY
« Reply #5480 on: October 12, 2018, 04:05:57 PM »
Hi-

So I'm working on an older dual rev D with the mnats power supply.  I had the PSU working and trimmed to +30 and -10.  I finished one channel and applied power to test it, but forgot to disconnect the unfinished second channel from the psu and there must have been a short somewhere.  LEDs on the PSU went on briefly, heard a pop, lights out, I killed power after about two seconds.  Nothing smoked or looks fried.

Now the power trafo is acting funny.  Before, I was getting 25v between secondary ends and center tap.  Now I measure 0V between secondary ends and center tap, but I measure 75V between secondary ends and chassis.  Could I have fried the power transformer?  I should be able to read the correct transformer output voltage without the psu connected right? 

Thanks for any help.


weiss

Re: [BUILD] 1176LN Rev D DIY
« Reply #5481 on: November 08, 2018, 05:00:47 AM »
hey guys, can you answer a quick question for me?
if the rotary meter switch is set to GR off, should pad 22 show continuity to ground?

thanks

Hairball Audio

Re: [BUILD] 1176LN Rev D DIY
« Reply #5482 on: November 09, 2018, 01:30:07 PM »
hey guys, can you answer a quick question for me?
if the rotary meter switch is set to GR off, should pad 22 show continuity to ground?

thanks

Yes.
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