Search found 4680 matches

by mediatechnology
Mon May 17, 2021 9:13 am
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 131
Views: 170592

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

MIke - I sent you a PM. Thanks for your interest.
I hope to have a BOM later today and will then start on some assembly instructions.
I've spent the last few days testing the board pretty extensively - the 1M pt 10 sample FFTs take quite awhile to run.
by mediatechnology
Sun May 16, 2021 3:24 pm
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 396
Views: 159620

Rock Legend Eric Clapton Blasts Vaccine Safety ‘Propaganda’, Says He Had ‘Disastrous Reaction’

PS: I didn't wear my mask to the post office today.... I am fully vaccinated and not dead yet. :lol: You mentioned earlier that you wore a mask out of respect for others something to the effect of "it may or may not be effective but my wearing one makes other people feel better." I realize that I'm...
by mediatechnology
Sat May 15, 2021 5:41 am
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 396
Views: 159620

Vaccine Virtue Signaling And The Cult Of Woke

Vaccine Virtue Signaling And The Cult Of Woke Authored by Brandon Smith via Alt-Market.us All tyrannical systems need a large contingent of cheerleaders in order to survive and thrive; a group of exploitable and devout acolytes that will carry the torch and evangelize the masses with the ideology o...
by mediatechnology
Thu May 13, 2021 3:44 pm
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 131
Views: 170592

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

Thanks George and Mike! To answer your question George I have a couple of extra boards. I've been running a bunch of tests and updating the schematics to match the PC board. https://proaudiodesignforum.com/images/png/ULDO-Nacho_19_Sheet_1_051321.png ULDO Ultra-Low Distortion Oscillator Schematic (Ri...
by mediatechnology
Tue May 11, 2021 5:14 pm
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 131
Views: 170592

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

ULDO-Nacho checks out without any board errors. Will post some distortion FFTs. +20 dBu into 604Ω balanced is measuring below -141 dBc. Found that the 49R9Ω output resistors add a slight amount of third harmonic likely due to signal-induced self-heating. With 0Ω build-out third harmonic is even les...
by mediatechnology
Mon May 10, 2021 4:29 pm
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 131
Views: 170592

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

ExpressPCB got boards ordered on a 5 day turn-around produced in 2 days.

Looks like its time to build one and see if it runs...

Image
ULDO Nacho PC Board
by mediatechnology
Mon May 10, 2021 11:22 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1273
Views: 590568

Re: Entropy

This Sunday's repair drama began about 10:30 Saturday night when my wife reported that the hall bathroom was flooding. The lavatory's faucet hose between the cold valve and the nozzle had popped open. Unfortunately it's a proprietary Price Pfister part not available at big box retailers. I decided t...
by mediatechnology
Mon May 10, 2021 10:53 am
Forum: Build
Topic: TDK-Lambda Single, Bipolar and Triple Output Switching Power Supplies for Audio Projects
Replies: 5
Views: 5082

Re: TDK-Lambda Single, Bipolar and Triple Output Switching Power Supplies for Audio Projects

I'd look for a hiccup mode on the Meanwell when they're lightly loaded.
I don't recall seeing it with their open frame supplies but with the enclosed desktop "Green Power" series the hiccup was pretty bad.
by mediatechnology
Wed May 05, 2021 10:10 am
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 131
Views: 170592

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

I've got a prototype run of boards on order so in a week or so we'll see if this dog hunts.