Unwanted Bounce Enertec 4431 Capacitors

Short follow-on from the Refurbishment of the Enertec 4431 function Generator, Pete goes back and replaces the capacitors after eagle-eyed Defpom contacted him about waveform bounce. Pete shows the original capacitors, takes some measurment, discusses measurement frequency and a bit about the capacitor equivalent model and how higher than expected capacitoance readings can indicate leakage.
Original Video • Enertec 4431 Function ...
00:00:00 Introduction
00:00:12 Bouncy Bouncy
00:00:26 Recap - and forgetfulness
00:01:17 The old capacitors and annoying pinout
00:03:30 Adapter Boards
00:05:20 Measuring old Capacitors
00:12:00 Installing new capacitors
00:18:35 Reassembly
00:19:47 Much Better now
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[@MakeOrRepair]

thanks to @Defpom's Electronics Repair ua-cam.com/channels/llpBTH26_dAl5tYl7vA1TQ.html for pointing out the problem. If you haven't subscribed to him you should do!

[@TheDefpom]

Thank you, and very nice work there on the video.

[@pcwrangler09]

Good follow-through. Nice job.

[@MakeOrRepair]

Thanks!

[@sparkyprojects]

Q-Tip is a brand name that is also used in the UK, Cotton bud is the generic name

[@MakeOrRepair]

Thanks - I sometimes end up using US terms without thinking - I am so ashamed!!!

[@t1d100]

The PCB Adapters are quite an elegant solution. Kudos. For a non-adapter solution, maybe this would work... Use caps with axial leads and mount them vertically, as you would mount a resistor vertically and bend its free lead over to solder to the off-center pad. I guess that it depends on the new capacitors being smaller in diameter, allowing access to the non-centered pad...

[@MakeOrRepair]

Yes, but always sleave the long lead and/or tie it to the cap and then use a bit of pcb grade silicon to stop cap moving. Sometimes you can fit radial if the spacing is not too different - again though silicon to stop it moving. In this case have to be careful to ensure continuity - one part of the board was using the availability of 3-pins as a jumper to get ground to a tricky position.

[@TheDefpom]

Those boards are a nice solution

[@MakeOrRepair]

Thanks, Adapters are handy to have but I need to find a PCB supplier who lets me mix multiple designs on a single board - JLCPCB used to let me but now they charge extra engineering fee.

[@TheDefpom]

@@MakeOrRepair The way to solve that is to get a sponsorship so you don't have to pay for the boards, PCBway sponsor me currently (whenever I need to make a PCB they are happy to support me), I have also worked with JCLPCB, and PCBgogo, I suggest trying one of those companies to see if they will offer you sponsorship.