Uploaded September 2026 | Updated September 2026, 3 hours ago
I have some old scrap PCBs here, some of them are over 50 years old. What interesting components do they contain? Are 50 year old electrolytic capacitors still working? Why do some transistors have four legs? Can we even identify all these strange things? Only one way to find out...
Transistor Markings
electronics-notes.com/articles/electronic_components/transistor/transistor-codes-numbering.php
Discount Codes
WORLDWIDE until 1st October
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For All Your PCB needs: free $5 discount coupon
pcbway.com/setinvite.aspx?inviteid=561767
Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission.
DM40C
https://s.click.aliexpress.com/e/_c4q1dFy7
Aneng AN870 (Same as Zoyi ZT219)
https://s.click.aliexpress.com/e/_c2wcOv9N
Zoyi ZT-DQ02
https://s.click.aliexpress.com/e/_oB2u3sT
WinAPEX 268B Clamp Meter
https://s.click.aliexpress.com/e/_opJTjEP
VC480C+ MILLIOHM METER
https://s.click.aliexpress.com/e/_onE0FaJ
MESR-100 ESR METER
https://s.click.aliexpress.com/e/_oombcej
XC6013L CAPACITOR METER
https://s.click.aliexpress.com/e/_omnOxub
FNB58 USB ANALYZER
https://s.click.aliexpress.com/e/_c3hysTXt
4KV Breakdown Tester
https://s.click.aliexpress.com/e/_omKXmND
LED Backlight Tester
https://s.click.aliexpress.com/e/_oCRPzdl
NI-210SC Curve Tracer
https://s.click.aliexpress.com/e/_o2e0Par
NI210SJ (cheaper option but watch my review)
https://s.click.aliexpress.com/e/_oD60O0D
PCI POST ANALYZER
https://s.click.aliexpress.com/e/_c44XQKaj
FNIRSI 1014D SCOPE
https://s.click.aliexpress.com/e/_c2xAnnbv
NPS3010W 30V 10A PSU
https://s.click.aliexpress.com/e/_oDuHLdl
Nice-Power Dual 120V 3A PSU
https://s.click.aliexpress.com/e/_okGvYQ7
HR1520 Pro Short Killer
https://s.click.aliexpress.com/e/_c2RE3ToB
KSGER T12 Soldering Station
https://s.click.aliexpress.com/e/_omqBjWR
AIFEN-A9 PRO Soldering Station C115/C210/C245/C470
https://s.click.aliexpress.com/e/_ongFBEJ
C470 Soldering Iron & Tips
https://s.click.aliexpress.com/e/_opm1OND
https://s.click.aliexpress.com/e/_oDVNACf
QUICK 861DW
https://s.click.aliexpress.com/e/_ooW7QGR
PROS'KIT SS-331H
https://s.click.aliexpress.com/e/_omxB5H5
Sequre HT140 Hot Tweezers
https://s.click.aliexpress.com/e/_opH6KS3
KADA 853B Preheater
https://s.click.aliexpress.com/e/_opPOUgX
FNIRSI SWM-10 Spot Welder
https://s.click.aliexpress.com/e/_ooZey3t
INFIRAY P2 PRO IR CAMERA + MACRO LENS
https://s.click.aliexpress.com/e/_ootcxPv
TOOLTOP ET13S THERMAL CAMERA METER
https://s.click.aliexpress.com/e/_c4MMdodZ
ET13S MACRO LENS
https://s.click.aliexpress.com/e/_ol9d8hh
Trinocular Microscope
https://s.click.aliexpress.com/e/_okJictD
TOMLOV TM4K AF FLEX
https://s.click.aliexpress.com/e/_oBirts7
TL866 II+ PROGRAMMER
https://s.click.aliexpress.com/e/_c32XDS1D
NC-559-ASM FLUX
https://s.click.aliexpress.com/e/_onMlHRD
DESOLDER BRAID (I use size 8045)
https://s.click.aliexpress.com/e/_onhlLkx
HX-T100 SOLDER
https://s.click.aliexpress.com/e/_o2DHwJH
ESD-11 TWEEZERS
https://s.click.aliexpress.com/e/_om2F4w3
Learn Electronics Repair Discord
discord.gg/vam6YC8vwU
If you would like to support this channel
You can send donations
paypal.com/paypalme/youtubeLER
You can subscribe to Patreon
patreon.com/learnelectronicsrepair
Or you can click JOIN to become a channel member
Thank you
Richard
I have some old scrap PCBs here, some of them are over 50 years old. What interesting components do they contain? Are 50 year old electrolytic capacitors still working? Why do some transistors have four legs? Can we even identify all these strange things? Only one way to find out...
Transistor Markings
electronics-notes.com/articles/electronic_components/transistor/transistor-codes-numbering.php
Discount Codes
WORLDWIDE until 1st October
👉Click https://s.click.aliexpress.com/e/_EJTSFLU or enter the search code [AY0QDR] on the AliExpress homepage or enjoy extra savings with the exclusive discount codes below.
🌟 Remember, these codes can be used on almost all items AliExpress.
$3 off on orders over $29:【IFP4Z7CD】
$6 off on orders over $59:【IFPAJEZM】
$9 off on orders over $89:【IFPRNO4O】
$16 off on orders over $149:【IFPUJ36B】
$23 off on orders over $199:【IFPTOX9W】
$30 off on orders over $269:【IFPZKRLP】
$40 off on orders over $369:【IFP31PZF】
$50 off on orders over $469:【IFPW85ON】
$60 off on orders over $599:【IFPPCTYJ】
$70 off on orders over $699:【IFPNP6MS】
USA ONLY until 1st October
👉Click https://s.click.aliexpress.com/e/_EG4DFJU or enter the search code [AYECF8] on the AliExpress homepage or enjoy extra savings with the exclusive discount codes below.
$3 off on orders over $22: 【IFPJJA2V】
$5 off on orders over $38: 【FPFTKGF】
$8 off on orders over $60: 【IFP1E8XE】
$14 off on orders over $99:【IFPY43E9】
$22 off on orders over $159:【IFPFYLCK】
$33 off on orders over $239:【IFPPF7W3】
$52 off on orders over $359:【IFPCOJYA】
$66 off on orders over $469:【IFPR0LZX】
For All Your PCB needs: free $5 discount coupon
pcbway.com/setinvite.aspx?inviteid=561767
Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission.
DM40C
https://s.click.aliexpress.com/e/_c4q1dFy7
Aneng AN870 (Same as Zoyi ZT219)
https://s.click.aliexpress.com/e/_c2wcOv9N
Zoyi ZT-DQ02
https://s.click.aliexpress.com/e/_oB2u3sT
WinAPEX 268B Clamp Meter
https://s.click.aliexpress.com/e/_opJTjEP
VC480C+ MILLIOHM METER
https://s.click.aliexpress.com/e/_onE0FaJ
MESR-100 ESR METER
https://s.click.aliexpress.com/e/_oombcej
XC6013L CAPACITOR METER
https://s.click.aliexpress.com/e/_omnOxub
FNB58 USB ANALYZER
https://s.click.aliexpress.com/e/_c3hysTXt
4KV Breakdown Tester
https://s.click.aliexpress.com/e/_omKXmND
LED Backlight Tester
https://s.click.aliexpress.com/e/_oCRPzdl
NI-210SC Curve Tracer
https://s.click.aliexpress.com/e/_o2e0Par
NI210SJ (cheaper option but watch my review)
https://s.click.aliexpress.com/e/_oD60O0D
PCI POST ANALYZER
https://s.click.aliexpress.com/e/_c44XQKaj
FNIRSI 1014D SCOPE
https://s.click.aliexpress.com/e/_c2xAnnbv
NPS3010W 30V 10A PSU
https://s.click.aliexpress.com/e/_oDuHLdl
Nice-Power Dual 120V 3A PSU
https://s.click.aliexpress.com/e/_okGvYQ7
HR1520 Pro Short Killer
https://s.click.aliexpress.com/e/_c2RE3ToB
KSGER T12 Soldering Station
https://s.click.aliexpress.com/e/_omqBjWR
AIFEN-A9 PRO Soldering Station C115/C210/C245/C470
https://s.click.aliexpress.com/e/_ongFBEJ
C470 Soldering Iron & Tips
https://s.click.aliexpress.com/e/_opm1OND
https://s.click.aliexpress.com/e/_oDVNACf
QUICK 861DW
https://s.click.aliexpress.com/e/_ooW7QGR
PROS'KIT SS-331H
https://s.click.aliexpress.com/e/_omxB5H5
Sequre HT140 Hot Tweezers
https://s.click.aliexpress.com/e/_opH6KS3
KADA 853B Preheater
https://s.click.aliexpress.com/e/_opPOUgX
FNIRSI SWM-10 Spot Welder
https://s.click.aliexpress.com/e/_ooZey3t
INFIRAY P2 PRO IR CAMERA + MACRO LENS
https://s.click.aliexpress.com/e/_ootcxPv
TOOLTOP ET13S THERMAL CAMERA METER
https://s.click.aliexpress.com/e/_c4MMdodZ
ET13S MACRO LENS
https://s.click.aliexpress.com/e/_ol9d8hh
Trinocular Microscope
https://s.click.aliexpress.com/e/_okJictD
TOMLOV TM4K AF FLEX
https://s.click.aliexpress.com/e/_oBirts7
TL866 II+ PROGRAMMER
https://s.click.aliexpress.com/e/_c32XDS1D
NC-559-ASM FLUX
https://s.click.aliexpress.com/e/_onMlHRD
DESOLDER BRAID (I use size 8045)
https://s.click.aliexpress.com/e/_onhlLkx
HX-T100 SOLDER
https://s.click.aliexpress.com/e/_o2DHwJH
ESD-11 TWEEZERS
https://s.click.aliexpress.com/e/_om2F4w3
Learn Electronics Repair Discord
discord.gg/vam6YC8vwU
If you would like to support this channel
You can send donations
paypal.com/paypalme/youtubeLER
You can subscribe to Patreon
patreon.com/learnelectronicsrepair
Or you can click JOIN to become a channel member
Thank you
Richard
