EEVblog Electronics Community Forum

EEVblog => EEVblog Specific => Topic started by: EEVblog on September 23, 2021, 01:38:58 pm

Title: EEVblog 1420 - Mailbag
Post by: EEVblog on September 23, 2021, 01:38:58 pm
1 hour Mailbag!

https://www.youtube.com/watch?v=45C6HFf2kIA (https://www.youtube.com/watch?v=45C6HFf2kIA)

SPOILERS:
00:00 - Pleo the Dinosaur!
The Commodore Collector: https://www.thecommodorecollector.com/ (https://www.thecommodorecollector.com/)
06:23 - Amazing workbench of the week from voltnut Xdevs!
https://xdevs.com/ (https://xdevs.com/)
14:25 - DEC VAX 370/11 135A 5V PSU teardown
22:22 - Emizon MCM Electronics alarm panel + AdPlayer LCD screen
Mike's LED Shed: https://www.youtube.com/c/MikesLEDShed/ (https://www.youtube.com/c/MikesLEDShed/)
31:29 - GVDA GD128 Colour LCD Multimeter
https://s.click.aliexpress.com/e/_ATURD0 (https://s.click.aliexpress.com/e/_ATURD0)
45:37 - I void Warranties T-Shirt
46:25 - Denon capacitor xmas ornament
47:41 - NetSTM32 ethernet board
https://www.tindie.com/products/netcubesystemsat/stm32-ethernet-board/ (https://www.tindie.com/products/netcubesystemsat/stm32-ethernet-board/)
https://netcube.li/docs/stm32netboard/ (https://netcube.li/docs/stm32netboard/)
51:22 - Kevin Lutzer's PCB Business Card
https://kevin.lutzer.ca/overview (https://kevin.lutzer.ca/overview)
54:22 - SnowPi RGB Xmas ornament
https://snowpi.xyz/ (https://snowpi.xyz/)
56:48 - Probe dithering average vibration attachment

Title: Re: EEVblog 1420 - Mailbag
Post by: golden_labels on September 23, 2021, 05:59:41 pm
I will never stop being amazed by your professional reviews of hole warmers, probe attachments and other interesting stuff. Perfect!
Title: Re: EEVblog 1420 - Mailbag
Post by: msuffidy on September 23, 2021, 11:30:33 pm
That power supply seems to be from a VAX 11/750 or related mainframe. There appears to be 2 different power supply boxes, like 2.5 and 5 volts. I have seen some documents about the mainframe, and just found the motherload on that part:

GOTCHA
http://oldcomputers.dyndns.org/public/pub/rechner/dec/manuals/decimages/h7104-d.pdf (http://oldcomputers.dyndns.org/public/pub/rechner/dec/manuals/decimages/h7104-d.pdf)

from the system of
http://lastin.dti.supsi.ch/VET/sys/VAX/VAX-11-780/EK-11780-PG-001.pdf (http://lastin.dti.supsi.ch/VET/sys/VAX/VAX-11-780/EK-11780-PG-001.pdf)
https://vt100.net/mirror/antonio/ek-vaxv3-hb-001.pdf (https://vt100.net/mirror/antonio/ek-vaxv3-hb-001.pdf)
Title: Re: EEVblog 1420 - Mailbag
Post by: mancausoft on September 24, 2021, 11:45:19 am
The also installed on vax 11/780, this a photo of the one that we start to repair
Title: Re: EEVblog 1420 - Mailbag
Post by: Neilm on September 24, 2021, 04:50:12 pm
Further reviews of that multimeter should include a 600 V very low impedance supply, a CDN and an 8 kV transient source.

I would suggest blast shields and a slow motion camera