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Entry  Tue Jan 21 19:41:59 2014, Jenne, Update, Electronics, RF distribution box power button fail 
    Reply  Wed Jan 22 16:36:45 2014, ericq, Update, Electronics, RF distribution box power button fail 
Message ID: 9566     Entry time: Wed Jan 22 16:36:45 2014     In reply to: 9563
Author: ericq 
Type: Update 
Category: Electronics 
Subject: RF distribution box power button fail 

Quote:

Rana, Gabriele and I are trying to measure the FSR of the PRC (elog about that later), and we turned off the power to the RF generation box so that we could switch cables at the EOM combiner.  However, as in elog 9101, the power button won't latch when we try to turn the power back on.  All 3 of us tried, to no avail.  For our measurement, poor Gabriele is standing holding the button pushed in, so that we can have some RF sidebands. 

Tomorrow, we'll have to pull the RF generation box, and put in a better switch.

I replaced the stupid broken fancy button with a simple sturdy switch. I had to file out the hole in the chassis a bit, but the switch is pressed in tightly and securely. I put the box back in the rack, but the power cable was coming directly from the power supplies with no fuses. The box was drawing ~.9 and 1.5 Amps from two supplies, so I put 2A fuses on both. Plugged everything back in, and the mode cleaner locks, so it looks like all is well.

RXA: When its so close, I prefer to size it up by 1 step. Please change to 5A fuses. Otherwise, we may blow them from power glitches.

Q: 5A fuses have been swapped in

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