Search found 3664 matches

by mediatechnology
Mon May 20, 2019 11:29 am
Forum: Stored Code
Topic: Wide Band Web-Based Software Defined Radio in Enschede NL
Replies: 2
Views: 14

Re: Wide Band Web-Based Software Defined Radio in Enschede NL

Nice!
I suppose having remote-controlled receivers is cheating. :lol:
by mediatechnology
Mon May 20, 2019 11:11 am
Forum: Stored Code
Topic: Wide Band Web-Based Software Defined Radio in Enschede NL
Replies: 2
Views: 14

Wide Band Web-Based Software Defined Radio in Enschede NL

A DXer's dream: Wide Band Web-Based Software Defined Radio in Enschede NL http://websdr.ewi.utwente.nl:8901/ https://proaudiodesignforum.com/images/jpg/Web_SDR_Screen.JPG Got a nice Radio Luxembourg (234 kHz 1.5 MW) aircheck the other night: Pink Floyd Dark Side of the Moon leading up to a top of t...
by mediatechnology
Sun May 19, 2019 6:38 pm
Forum: Test, Measurement and Repair
Topic: AudioTester is Back!
Replies: 0
Views: 17

AudioTester is Back!

One of the best low-cost (free/39 euro) audio test suites out there and my "go-to" application.

Unfortunately the site was unavailable for about a year. Now its back online with a new version.

http://audiotester.de/

Image
by mediatechnology
Sun May 19, 2019 6:03 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 860
Views: 323608

Re: Entropy

Just to pile on here with a list of failures in the last 2-3 weeks:

1) Coffee-maker. Leak in tank.
2) Toaster oven: Burnt out element.
by mediatechnology
Sun May 19, 2019 6:00 am
Forum: Build
Topic: shielding enclosure for prototyping
Replies: 1
Views: 25

Re: shielding enclosure for prototyping

I need to try one of those. Thanks for posting it Brian.

I had to shield a transformer which was about 35 mG the other day for a client and it looks like mu-metal will be about the only thing that works. For the phono preamp, which is seeing 1-2 mG steel may be good enough.
by mediatechnology
Sun May 19, 2019 5:50 am
Forum: Document
Topic: "Composite Op Amp For High Performance," Siliconix AN81-3, July 1983
Replies: 13
Views: 118

Re: "Composite Op Amp For High Performance," Siliconix AN81-3, July 1983

The CPH5902 is one they got from Sanyo's product line. Interesting. Thanks for the list.

https://www.onsemi.com/PowerSolutions/p ... id=CPH5902

This is the parametric table of ON JFETS. ON has nice tables.

https://www.onsemi.com/PowerSolutions/p ... 6/products
by mediatechnology
Sat May 18, 2019 1:10 pm
Forum: Document
Topic: "Composite Op Amp For High Performance," Siliconix AN81-3, July 1983
Replies: 13
Views: 118

Re: "Composite Op Amp For High Performance," Siliconix AN81-3, July 1983

Brad gets the credit for introducing me to the ZTX851.
At the time he hadn't used it but had read the new edition of Horowitz and Hill and pointed me in that direction.
by mediatechnology
Sat May 18, 2019 6:03 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 860
Views: 323608

Re: Entropy

In the early days of digital TV in UK we all had set top boxes to receive as decoders weren't built into the TVs yet. I had one that would slowly lose voice sync. Changing channel and back got it back again, but I never could work out how that could occur with a broadcast medium. @JR: if you do dis...
by mediatechnology
Sat May 18, 2019 5:54 am
Forum: Document
Topic: "Composite Op Amp For High Performance," Siliconix AN81-3, July 1983
Replies: 13
Views: 118

Re: "Composite Op Amp For High Performance," Siliconix AN81-3, July 1983

You could add it here: https://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=12&t=1136 I thought I had posted Dimitri's n-FET noise rankings before but I couldn't find it. I made a pdf of it since Electronic Design and EDN are notorious for unintentionally scrubbing figures from articles as ...
by mediatechnology
Sat May 18, 2019 5:52 am
Forum: Document
Topic: "Measurements Rate SMT Low-Voltage n-JFETs Under Consistent Conditions"
Replies: 0
Views: 16

"Measurements Rate SMT Low-Voltage n-JFETs Under Consistent Conditions"

"Measurements Rate SMT Low-Voltage n-JFETs Under Consistent Conditions," Dimitri Danyuk, Electronic Design, April 19, 2013. https://www.electronicdesign.com/print/52642 https://proaudiodesignforum.com/images/jpg/NFET_Noise_Measurements_Danyuk_1_600.jpg https://proaudiodesignforum.com/images/jpg/NFE...