Search found 5067 matches

by mediatechnology
Wed Jun 29, 2022 7:29 am
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020 = 2022 "Vaccine" Injury And Depopulation
Replies: 555
Views: 231676

Omicron BA.5 Prefers Hypervaccinated Masking West Germans, Avoids the Former DDR

Omicron BA.5 Prefers Hypervaccinated Masking West Germans, Avoids the Former DDR https://www.eugyppius.com/p/omicron-ba5-prefers-hypervaccinated Behold the latest map of 7-day Corona incidence across the Federal Republic of Germany: https://substackcdn.com/image/fetch/w_1456,c_limit,f_webp,q_auto:g...
by mediatechnology
Mon Jun 27, 2022 7:27 am
Forum: The Peabody Lounge
Topic: Manufacturers struggle to keep pace with vinyl record demand
Replies: 0
Views: 42

Manufacturers struggle to keep pace with vinyl record demand

Manufacturers struggle to keep pace with vinyl record demand The arrival of the compact disc nearly killed off record albums, with vinyl pressing machines sold, scrapped and dismantled by major record labels. Four decades later, with resuscitated record album sales producing double-digit annual gro...
by mediatechnology
Sat Jun 18, 2022 10:47 am
Forum: Test, Measurement and Repair
Topic: PC Power Supply Failures After Running on a UPS
Replies: 5
Views: 257

Re: PC Power Supply Failures After Running on a UPS

I decided to replace one more power supply in my Ubuntu/Win XP machine. This final replacement was 4 of 4. It ran fine but I had no idea how old it was. Turns out it was an Antec True 430 which was the original supply I bought with the case in 2002. It was so old it required a 20 to 24 pin ATX adapt...
by mediatechnology
Wed Jun 15, 2022 5:08 am
Forum: Test, Measurement and Repair
Topic: PC Power Supply Failures After Running on a UPS
Replies: 5
Views: 257

Re: PC Power Supply Failures After Running on a UPS

It occurred to me that two of the domed caps are on the secondary side of the standby switcher.

The input frequency and harmonic content of the UPS wouldn't have affected these capacitors.

They were just old. Very old.

There is one domed cap on the primary side.
by mediatechnology
Tue Jun 14, 2022 3:04 pm
Forum: Test, Measurement and Repair
Topic: PC Power Supply Failures After Running on a UPS
Replies: 5
Views: 257

Re: PC Power Supply Failures After Running on a UPS

I certainly have better things to do than perform forensics on a power supply I'm going to throw away but curiosity just got the best of me. So I tore it down and had a look: https://proaudiodesignforum.com/images/jpg/Antec_Earthwatts_Vented_Capacitors.jpg Sure enough the caps with the brown sleeve...
by mediatechnology
Tue Jun 14, 2022 8:14 am
Forum: Pro Audio Design
Topic: Balancing Resistors Reduce Voltage Follower Common Mode Distortion
Replies: 9
Views: 342

Re: Balancing Resistors Reduce Voltage Follower Common Mode Distortion

I thought when I posted these I would present the prettiest of the two first. The OPA2134 is not bad however in the 10K pot buffer scenario where Rsource is 2K49 and the Rfb 1K. I should probably look at it at +14 dBu since a +20 dBu input would require +26 dBu at the top of the pot which isn't goin...
by mediatechnology
Mon Jun 13, 2022 8:07 pm
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020 = 2022 "Vaccine" Injury And Depopulation
Replies: 555
Views: 231676

COVID UPDATE: What is the truth? Russell L Blaylock

COVID UPDATE: What is the truth? Russell L Blaylock https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9062939/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9062939/bin/SNI-13-167-inline001.jpg The COVID-19 pandemic is one of the most manipulated infectious disease events in history, characterized by off...
by mediatechnology
Mon Jun 13, 2022 6:55 pm
Forum: Test, Measurement and Repair
Topic: PC Power Supply Failures After Running on a UPS
Replies: 5
Views: 257

Re: PC Power Supply Failures After Running on a UPS

Thanks Duke. If they received a spike they continued to run for the several minutes it took to shutdown four machines and the UPS. I have whole-house MOVs and both UPS units have MOVs as well. There are also four driven ground rods and a Current Technology Power Sifter ahead of the APC on the workbe...
by mediatechnology
Mon Jun 13, 2022 11:14 am
Forum: Pro Audio Design
Topic: Balancing Resistors Reduce Voltage Follower Common Mode Distortion
Replies: 9
Views: 342

Re: Balancing Resistors Reduce Voltage Follower Common Mode Distortion

OPA2134 Voltage Follower Common Mode Distortion vs Rs and Rfb These were all done at +20 dBu. OPA2134 Rfb=1K Rs=0Ω https://proaudiodesignforum.com/images/jpg/OPA2134_Follower_+20dBu_Rs0_Rfb1K.jpg THD 0.00033519%; 3.35 ppm; -109.49 dBc OPA2134 Rfb=1K Rs=2K49 https://proaudiodesignforum.com/images/jp...