Search found 4525 matches

by mediatechnology
Sun Sep 20, 2020 8:15 pm
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 266
Views: 14921

Dexamethasone: UK Study as A Covid-19 Therapeutic

The media and some physicians who support Covid fraud have gone into overdrive to discredit Dr. Richard Bartlett's claim that Budesonide, an inhaled nebulized steroid, is a "silver bullet for the treatment of late stage Covid-19 infection yet we find numerous articles supporting the use of Dexameth...
by mediatechnology
Sun Sep 20, 2020 4:56 pm
Forum: Document
Topic: Texar Audio Prism Schematics and Information
Replies: 24
Views: 25416

Re: Texar Audio Prism Schematics and Information

The TDK CUT35 switcher measures significantly quieter than the internal supply. https://proaudiodesignforum.com/images/jpg/Texar_Hum_Signature_TDK_CUT35_Supply.jpg Texar Audio Prism hum signature using the TDK CUT35 switching power supply. The 240 Hz peak is interesting but overall the unit measure...
by mediatechnology
Sun Sep 20, 2020 3:04 pm
Forum: Pro Audio Design
Topic: A Lesson In Split Power Supply Load Balancing
Replies: 0
Views: 12

A Lesson In Split Power Supply Load Balancing

A Lesson In Split Power Supply Load Balancing

The story resides here: viewtopic.php?f=12&t=763&p=15586#p15586

Keep DC out of the magnetic circuit...
by mediatechnology
Sun Sep 20, 2020 2:44 pm
Forum: Document
Topic: Texar Audio Prism Schematics and Information
Replies: 24
Views: 25416

Texar Audio Prism Hum Reduction

Once the refurbishment was complete with new PSU caps I decided to listen to the noise floor which is dominated by some nasty hum. The FFTs are not that great. The solution to the source of the hum provides an interesting story and power supply life-lesson. This is the Texar's unmodified FFT: https...
by mediatechnology
Sun Sep 20, 2020 2:18 pm
Forum: Pro Audio Design
Topic: How Closely Do The Values Of Electrolytic Caps From The Same Lot Match?
Replies: 15
Views: 128

Re: How Closely Do The Values Of Electrolytic Caps From The Same Lot Match?

I do think that might be fair to say.

Finding the better ones seems to be a good use of null testing.
by mediatechnology
Sun Sep 20, 2020 5:30 am
Forum: Pro Audio Design
Topic: How Closely Do The Values Of Electrolytic Caps From The Same Lot Match?
Replies: 15
Views: 128

Re: How Closely Do The Values Of Electrolytic Caps From The Same Lot Match?

This is the report that Dave Hill shared with us on SMT resistor distortion sometime ago: http://www.waynekirkwood.com/images/pdf/SMT_Resistor_Distortion_rev_1_Dave_Hill_Cranesong.pdf It is posted in the thread here: https://proaudiodesignforum.com/forum/php/viewtopic.php?f=6&t=401 https://proaudiod...
by mediatechnology
Fri Sep 18, 2020 10:14 pm
Forum: Pro Audio Design
Topic: How Closely Do The Values Of Electrolytic Caps From The Same Lot Match?
Replies: 15
Views: 128

Re: How Closely Do The Values Of Electrolytic Caps From The Same Lot Match?

Annealing is a tricky process.
That's what makes some SMT resistors very low distortion and others horrible. https://proaudiodesignforum.com/forum/p ... ?f=6&t=401
by mediatechnology
Fri Sep 18, 2020 9:56 pm
Forum: Document
Topic: Texar Audio Prism Schematics and Information
Replies: 24
Views: 25416

Refurbishing the Texar Audio Prism

I just finished refurbishing a pair of the Texar Audio Prisims that I've had "in waiting: since 2015. https://proaudiodesignforum.com/images/jpg/Texar_Front_1.jpg Texar Audio Prisims on the workbench... The first repair I made was back in 2015 to cure "Molexia" intermittents. https://proaudiodesign...
by mediatechnology
Thu Sep 17, 2020 11:57 am
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 266
Views: 14921

Re: The Corona Virus Hoax of 2020

They conspired.
by mediatechnology
Thu Sep 17, 2020 5:31 am
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 266
Views: 14921

Nashville Officials Concealed Low COVID-19 Numbers Coming From Bars And Restaurants: Leaked Emails

Nashville Officials Concealed Low COVID-19 Numbers Coming From Bars And Restaurants: Leaked Emails Leaked emails between the senior adviser to Nashville's Mayor and a health department official reveal a disturbing effort to conceal extremely low coronavirus cases emanating from bars and restaurants...