Search found 3445 matches

by JR.
Sun Aug 30, 2020 7:10 pm
Forum: The Peabody Lounge
Topic: I love modern technology
Replies: 59
Views: 4263

Re: I love modern technology

Do you have a link to the $32 surround decoder that actually works? It's on my list as something to mess with over the winter. https://www.amazon.com/gp/product/B011DG4VEA/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1 It was $29.99 but apparently not in stock any more... I've had mixed results w...
by JR.
Sun Aug 30, 2020 11:58 am
Forum: The Peabody Lounge
Topic: I love modern technology
Replies: 59
Views: 4263

Re: I love modern technology

I haven't dropped a squirrel in over year, despite two very good opportunities a week ago. I purchased a laser bore sight, and zero'd in my scope. :roll: No wonder the squirrels barely noticed that I was firing on them. The laser pointer indicates my scope was aiming low and to the left about two s...
by JR.
Sat Aug 29, 2020 11:35 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1140
Views: 430553

Re: Entropy

I don't want to jinx this but the connection between lamp filament (electrodes) and socket base for my 6W UV lamp has been intermittent for months. I have been able to get the lamp to start when balking by wiggling it. After a few months of doing this I decided to take it apart and dig deeper... The...
by JR.
Sat Aug 29, 2020 9:05 am
Forum: Pro Audio Design
Topic: Cheap Surround sound buffer/level shifter
Replies: 25
Views: 1011

Re: Cheap Surround sound buffer/level shifter

OK I had nothing better to do this morning so I looked up a spec sheet on the NC400. The differential input impedance is listed as 104k, so the 4:1 step up input transformer will only reflect that down to a 6.5k ohm effective input impedance. 6.5k input Z should not be heavy lifting. The nominal vol...
by JR.
Fri Aug 28, 2020 11:13 am
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 265
Views: 14710

Re: The Corona Virus Hoax of 2020

Could be an innocent mistake... Unlikely a cheat would go that big, but who knows?

JR
by JR.
Thu Aug 27, 2020 2:30 pm
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1140
Views: 430553

Re: Entropy

Interesting fail and repair... today is my once a week shopping day and one of the elastic bands on my only n95 mask frayed and pulled out of the staple attachment.

Easy repair to re-crimp the elastic.

JR
by JR.
Wed Aug 26, 2020 9:21 am
Forum: Pro Audio Design
Topic: Cheap Surround sound buffer/level shifter
Replies: 25
Views: 1011

Re: Cheap Surround sound buffer/level shifter

sorry to chime in so late… but which Hypex modules are you using? they vary quite a bit in terms of RMS input for full power output… UcD34MP, apparently now obsolete. i assembled a pair of NC400 monobloc amp kits last year. the DIY kits contain everything neccessary to build a complete amp, includi...
by JR.
Wed Aug 26, 2020 8:38 am
Forum: Pro Audio Design
Topic: Cheap Surround sound buffer/level shifter
Replies: 25
Views: 1011

Re: Cheap Surround sound buffer/level shifter

Who makes your boards? I used https://dirtypcbs.com/store/order/2060705/c34c1d3a5b6f4ae38cefc8a12daf2ff012f739e6 .. Thay have a pretty good interface, with a gerber viewer right on their website to confirm the release package is OK before they bundle the order to a cheap chinese board maker. In hin...
by JR.
Wed Aug 26, 2020 8:31 am
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 265
Views: 14710

Re: The Corona Virus Hoax of 2020

Gates is already hated by the cancel culture because he is wealthy. === It looks like the drug industry is standing up their new COVID cash cow... not only Annual COVID shots (like flu shots), but booster shots as reportedly a hong kong man has been infected with different strains of COVID, two diff...
by JR.
Tue Aug 25, 2020 4:28 pm
Forum: Pro Audio Design
Topic: Cheap Surround sound buffer/level shifter
Replies: 25
Views: 1011

Re: Cheap Surround sound buffer/level shifter

Finally on order... plusten.jpg This feels a little like giving birth... I ordered 10 pc proto run (minimum), and a stencil so I can screen on solder paste... The row of pots across the top are input trims between digital surround decoder and gain stage. I incorporated 1.5x gain from the wiper, doub...