Search found 5461 matches

by mediatechnology
Thu Dec 03, 2009 10:26 am
Forum: Build
Topic: Wayne's headphone amp build
Replies: 4
Views: 27803

Re: Wayne's headphone amp build

It should be unity gain. I haven't had any lack of adequate drive with cosnumer level "-10" stuff.

You might try the +9 dB trick here: viewtopic.php?f=6&t=23&start=100
by mediatechnology
Thu Dec 03, 2009 8:57 am
Forum: Build
Topic: Wayne's headphone amp build
Replies: 4
Views: 27803

Re: Wayne's headphone amp build

Nice build! I had my Dad make me a pair of walnut wooden end-caps for dBx extrusion like that years ago and I should use them. I had a 3BX that came to me rack-mount I wanted to convert. I also use AKG K240Ms and I am certain I need more gain for those being higher impedance, 600Ohms. I think you ha...
by mediatechnology
Thu Nov 19, 2009 3:44 pm
Forum: Build
Topic: ms matrix- at last
Replies: 8
Views: 32650

Re: ms matrix- at last

Great job on the build Milos!

I haven't zoomed the images in the links. What are the switches for? It looks like some are ground lift and the other group bypass or mutes?

Miko - My vote is a dual mono/MS Pico compressor. No one's done that one here.
by mediatechnology
Wed Nov 18, 2009 8:37 am
Forum: Build
Topic: Mid Side M-S Matrix Construction Information
Replies: 121
Views: 439539

Re: Mid Side M-S Matrix Construction Information

Milos - Thanks for the test data. The 1646 line driver doesn't have as good a gain accuracy as the THAT1240 and 1246 line receivers do. You might swap the M and S 1646s and pick-up (or lose) a few dB. Loading by external gear will also have a great effect even if they are exactly unity gain. It does...
by mediatechnology
Mon Nov 16, 2009 4:17 pm
Forum: Pro Audio Design
Topic: Newark Corp now owns Cadsoft
Replies: 11
Views: 22026

Re: Newark Corp now owns Cadsoft

OK, maybe it was Express PCB. I never use that part of it 'cause you do the really hard stuff which is layout.
by mediatechnology
Mon Nov 16, 2009 11:00 am
Forum: Pro Audio Design
Topic: Newark Corp now owns Cadsoft
Replies: 11
Views: 22026

Re: Newark Corp now owns Cadsoft

BTW I think that may have been the Orcad (several versions ago) that had Digi-Key integration.
by mediatechnology
Sun Nov 15, 2009 7:33 am
Forum: Pro Audio Design
Topic: Newark Corp now owns Cadsoft
Replies: 11
Views: 22026

Re: Newark Corp now owns Cadsoft

Do I recall a design package that is affiliated with Digi-Key? IIRC it had libraries for DIgi-Key parts and used Digi-Key PNs to generate the BOM.

Interesting to see what Mouser will do.
by mediatechnology
Wed Oct 28, 2009 7:41 am
Forum: Pro Audio Design
Topic: +24Vdc from +/-15Vdc
Replies: 2
Views: 6422

Re: +24Vdc from +/-15Vdc

Doug:

The second and third from-the-last connection examples here http://us.tdk-lambda.com/lp/ftp/specs/C ... df#page=15 seem to indicate that the input and outputs are floating and that you can common them or use it to provide negative output.

Wayne
by mediatechnology
Sat Oct 24, 2009 11:59 am
Forum: Build
Topic: Interesting Gain Reduction Meter - LCD Analog Pointer
Replies: 0
Views: 12910

Interesting Gain Reduction Meter - LCD Analog Pointer

I recently saw this in Electronic Products: http://www.lascarelectronics.com/dataloggersandpanelmeters/data-logger0905355001195041046.jpg 21 mm! Product Page: http://www.lascarelectronics.com/temperaturedatalogger.php?datalogger=111 Datasheet: http://www.lascarelectronics.com/pdf-usb-datalogging/dat...
by mediatechnology
Fri Oct 16, 2009 11:26 am
Forum: The Peabody Lounge
Topic: Check Out This 9V Battery
Replies: 7
Views: 12880

Re: Check Out This 9V Battery

In typical radials, the metal can is not physically attached to either lead. I ran some experiments on large-value (Cgain) caps and found large differences in capacitance from the can to the terminals. (You would expect this but I wanted to know.) My interest was Cgain capacitors in preamps. At hig...