Pete needs an RF divider so he makes one - then has fun playing with different builds. 5 Different builds of the "Wye" Resistive splitter are tried and then their performance quickly looked at on the VNZ (Vector network analyser). For information, the discrete resistors are about 20p each, the array depends on size but in the region of £2.50 to £3.50 - The boards are about £6 delivered (and there are 6 of them!) ? I purchased PCBS from JLCPCB and ? All other parts from Digi-key ? Mailbag https://youtu.be/SkZ60szMsUw 00:00 - Intro and Overview 01:42 - I just needed... 02:48 - Play with different designs 03:28 - Circuit theory and impedence matching 13:39 - All Built - let's take a look 14:45 - A tricky soldering problem!!! Comments on the builds 16:01 - Commercial results (S11 reflection/ return loss,S21 insertion loss, VSWR, Inductance...) 17:45 - Idiotic - commercial has wrong resistors! 18:19 - Discrete resistor board results 21:05 - WOW Resistor Array Results are outstanding 24:10 - Bodge surface mount reults 25:52 - Through hole nastiness 27:27 - Are Keysight / Tek any better? 28:46 - Test the best one to 3GHz - Fantastic! 33:30 - Results summary and conclusion As always please help by subscribing and liking videos. ? https://www.youtube.com/channel/UCDGlaK7fh5ZY6nFLznaHgZw?sub_confirmation=1 ?Follow me on twitter for the latest updates https://twitter.com/PeterShersby ?I'm on Odysee too: https://odysee.com/$/invite/@MOR:9 Videos mentioned Mailbag - https://youtu.be/SkZ60szMsUw Affiliate Links, using these links helps support the channel: ?Octopus Energy £50 for you http://share.octopus.energy/sunny-ape-959 If you are thinking of changing electicity or gas supplier, try Octopus and by using my link, if you sign up, you will get £50 credit after your first DD payment, and I get £50 too which I can use to buy more exciting things for the channel. Remember to check out Octopus go if you have a SMETS2 smart meter and either batteries or EV

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 https://youtu.be/uHZldVLMl4I 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 ? Manual https://elektrotanya.com/enertec_schlumberger_4431_techmaint_manual.pdf/download.html Help me keep the channel going: ?Topcashback https://www.topcashback.co.uk/ref/pshersby offers 4% cashback from Farnell purchases and plenty more too ?Octopus Energy £50 for new customers http://share.octopus.energy/sunny-ape-959 ?Donations always welcome! https://www.paypal.com/paypalme/PeterShersby As always please help by subscribing and liking videos. ? https://www.youtube.com/channel/UCDGlaK7fh5ZY6nFLznaHgZw?sub_confirmation=1 ? Follow me on twitter for the latest updates https://twitter.com/PeterShersby ? I'm on Odysee too: https://odysee.com/$/invite/@MOR:9

Pete is making rubber parts. This is a segment cut from a video about mending a reel-to-reel tape recorder. He was unable to get the replacment rubber parts after the originals turned to goo. So, never knowing when to call it a day he made his own. This video shows the creation of a 3D model then the molds using FreeCAD, the materials used, pouring the rubber and finally extracting the finished products. **Chapters** 00:00 - Intro 01:35 - Starting CAD Work in FreeCAD 08:35 - The solid master part 09:10 - Converting the solid master into a set 11:23 - Subtracting to get the top mold half - ish 14:34 - removing pins from hollow mold half - top half of mold is done 18:47 - oops I need to make the finished top thicker 21:27 - adding pins to the bottom half of the mold 24:36 - ready to print 25:15 - The materials needed 26:58 - molds assembled ready to fill 29:59 - mixing and colouring the rubber 32:58 - a rubbery injection 34:52 - looking after your rubber 36:15 - 5-hours later all set 37:12 - First part out - its a boy! 38:18 - 11 out of 12 remaing rubber items isn't bad 41:36 - are they ok - YES 42:25 - wrapping it up Product Links FreeCAD https://www.freecadweb.org/ MB Fibreglass https://www.mbfg.co.uk/ Rubber https://www.mbfg.co.uk/polyurethane-rubbers.html pigment https://www.mbfg.co.uk/lr-pth-polyurethane.html Argon gas https://smile.amazon.co.uk/gp/product/B07MQFTKPN/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 Mold Release spray https://smile.amazon.co.uk/gp/product/B00I1YVQE6/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1 **Affiliate Links and Offers** http://share.octopus.energy/sunny-ape-959 I recently changed to Octopus Energy for my UK electricity and Gas and had a smart meter installed, now I use Octopus Go agile energy rate that gives me quite large savings by moving washing etc to the nightime when the price is really low If you use my link you will get £50 back after your first DD payment, and I get £50 too which I can use to buy more exciting things for the channel. http://share.octopus.energy/sunny-ape-959 My Photographic art website http://www.petershersby.com

Pete shares a very quick tip about fitting tight heatsinks to round can transistors 00:00 - Intro and what's the problem 00:30 - 8mm Transistor into a 6mm hole 01:00 - I rummaged in my toolbox 01:21 - It slides easily into the whole 01:41 - Pop it on and wiggle it down! 01:55 - All done ?Subsriptions really help - https://www.youtube.com/channel/UCDGlaK7fh5ZY6nFLznaHgZw?sub_confirmation=1 ?Follow me on twitter for the latest updates https://twitter.com/PeterShersby I'm on Odysee too: ?https://odysee.com/$/invite/@MOR:9 Affiliate Links, using these links helps support the channel: ?Try Amazon Prime for 30-days free https://www.amazon.co.uk/tryprimefree?tag=mor0c3-21 ?Octopus £50 for you http://share.octopus.energy/sunny-ape-959 I recently changed to Octopus Energy for my UK electricity and Gas and had a smart meter installed, now I use Octopus Go Agile to reduce my bill. If you are thinking of getting a quote, use my link and if you sign up you will get £50 back after your first DD payment, and I get £50 too which I can use to buy more exciting things for the channel.