| Products > Test Equipment |
| HP 5316A Teardown and Frequency Standard |
| << < (4/22) > >> |
| Alex Eisenhut:
Odd, mine looks like this |
| PA0PBZ:
--- Quote from: Alex Eisenhut on November 16, 2014, 05:36:24 pm ---Odd, mine looks like this --- End quote --- Because it has the C input option. |
| Alex Eisenhut:
--- Quote from: PA0PBZ on November 16, 2014, 05:40:57 pm --- --- Quote from: Alex Eisenhut on November 16, 2014, 05:36:24 pm ---Odd, mine looks like this --- End quote --- Because it has the C input option. --- End quote --- Yeah but I mean graphically, even the HP logo isn't the same. |
| amc184:
Yeah, yours is a little bit older, maybe 1983. Mine is around 1985 vintage. Thanks for the picture mweymarn, it looks really good, nice clean build. I checked out the service manual as best I could when I designed the PCB to try to make sure it would fit both types of 5316, I'm glad it worked. |
| nixxon:
--- Quote from: amc184 on November 14, 2014, 09:10:43 pm ---It looks like the PCB will work. The pinout for the earlier 5315 was: 1) NC 2) RF 3) GND 4) VCC (5V regulated) 5) NC 6) NC So it looks like your later 5315 is designed to allow the use of either type of module. I'll PM you about getting a PCB shipped to you. I've also attached the schematic, design files and gerber. Anyone should feel free to use them to make their own PCBs, or modify them to suit their own counter. They're made with DipTrace, the type numbers in the bill of materials are element14 part numbers. --- End quote --- Thank you for attaching the schematics, layout files and gerber. They gave me a reason to download DipTrace, simply to be able to read all the files. It looks very impressive. Maybe, the layout files will make a good starting point to learn a little about DipTrace as well. When I look at the schematics ("004 B1.pdf"), I notice that there are 2 capacitors (C101 and C102) in parallel between +10 VCC (pins 1+6) and GND (pin3). C101 is huge, 330 uF, compared to C102, 100 nF. They both add up to a capacitance of 330uF + 0.1uF = 330.1uF. My noob guess is that C101 is there to reduce the ~600mVpp ripple of the VCC. My noob question is: What is the purpose of C102? (I notice a similar thing between the +5V output of U101 (LM1085, powering the OCXO) and GND as well. One huge, 330uF capacitor, C105, in parallel with multiple tiny capacitors, C104, C106 and C107. They all add up to 330.201uF. What is the purpose of adding 0.201uF to 330uF?) |
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