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Filters/Equalizers / Re: EQP1A Standard Test Procedure
« Last post by dbonin on January 21, 2021, 10:04:25 PM »Thanks Ian, Doug.
We also hired someone from Hopkins last year who stuck one in a rocket hooked up to a radio transmitting flight data as a cheap black box.
Thanks for the detailed explanation.
I did everything here. All Pin 1 connected to chassis. Bolted with the earth from mains inlet. CRC board ground is now connected to Chassis at the bolt. I Check the voltages and find out that 7815 was not working properly so I replaced it. But, The hum is still there. Is there any schematic or a link to a schematic for the proper CRC board for GSSL? Is it also connected to main at some point? Inpult voltages on CRC board are 22V ac and output are +27.1V and -27.8V DC. Is this normal or am I missing something here?
Ordered some of the cans from Farnell UK before Xmas and they came without the plate. Spoke to Farnell who said they werent sure if the plate was being supplied anymore.
So contacted OEP who were very apologetic and said yes, the plate should have been supplied and sent me some direct.
So the ones Newark got from OEP were probably from the same batch that Farnell UK got.