Search found 5449 matches

by mediatechnology
Wed Oct 22, 2008 7:24 pm
Forum: Pro Audio Design
Topic: THAT1510 THAT1512 Single-Supply Preamp with "T-Bias"
Replies: 7
Views: 30802

Re: THAT1510 THAT1512 Single-Supply Preamp with "T-Bias"

I was just looking at the SSL 82E149 active mic preamp and noticed that it used T-bias: https://www.ka-electronics.com/images/jpg/SSL_82E149_T-Bias.jpg The full pdf is here: https://www.ka-electronics.com/images/SSL/ssl_drawings_index.htm I notice that the bias resistors form a ~3K differential load...
by mediatechnology
Fri Oct 17, 2008 7:03 am
Forum: Document
Topic: MicMix MasterRoom XL-305 Schematics and Manual
Replies: 2
Views: 27832

MicMix MasterRoom XL-305 Schematics and Manual

Here are the XL-305 schematics. These files range in size from ~2.5 MB to 4 MB. https://www.ka-electronics.com/MasterRoom/XL305_Tile1.JPG https://www.ka-electronics.com/MasterRoom/XL305_Tile2.JPG https://www.ka-electronics.com/MasterRoom/XL305_Tile3.JPG https://www.ka-electronics.com/MasterRoom/XL30...
by mediatechnology
Wed Oct 15, 2008 3:30 pm
Forum: The Peabody Lounge
Topic: Hello Forum
Replies: 2
Views: 7274

Re: Hello Forum

Thanks for joining us and welcome aboard!

Wayne
by mediatechnology
Fri Oct 10, 2008 5:24 pm
Forum: Document
Topic: Symetrix 425 Manual
Replies: 0
Views: 8235

Symetrix 425 Manual

I had a Symetrix 425 expander/compressor/limiter in for repair and decided to scan the manual and host the pdf. https://www.ka-electronics.com/Images/pdf/Symetrix_425_Manual.pdf (25 MB) It uses a CA3046 transistor array as a detector with both log peak and log average outputs. It's very similar to t...
by mediatechnology
Thu Oct 09, 2008 4:05 pm
Forum: Pro Audio Design
Topic: new shiny hammer- or Universal comp
Replies: 52
Views: 88135

Re: new shiny hammer- or Universal comp

Congratulations JR!

How do we get some?
by mediatechnology
Mon Oct 06, 2008 8:16 pm
Forum: Pro Audio Design
Topic: THAT1510 THAT1512 Single-Supply Preamp with "T-Bias"
Replies: 7
Views: 30802

Re: THAT1510 THAT1512 Single-Supply Preamp with "T-Bias"

Thanks John - I do agree that 1Kx2 might be a little low as a differential load. 1.5Kx2 or 2Kx2 raises Zdiff to a more acceptable level. There is one source I need to cite that places the desired Zdiff around 3K total. I think the 3K assupmtion is based on paralleled active inputs for splits... I do...
by mediatechnology
Mon Oct 06, 2008 10:26 am
Forum: Pro Audio Design
Topic: THAT1510 THAT1512 Single-Supply Preamp with "T-Bias"
Replies: 7
Views: 30802

THAT1510 THAT1512 Single-Supply Preamp with "T-Bias"

This single-supply preamp design was presented by THAT Corp. at the 125th AES convention as part of one of their seminars. It uses an input biasing arrangement we're now calling "T-bias." Although the circuit was designed for single-supply operation from 10-36V, the T-bias network can be u...
by mediatechnology
Sat Oct 04, 2008 2:31 pm
Forum: Document
Topic: Phono Preamps
Replies: 49
Views: 199394

Re: Phono Preamps

Thanks John for the comments. I saw that inductor too and immediately thought of the JE-990.
by mediatechnology
Sat Oct 04, 2008 8:39 am
Forum: Document
Topic: Phono Preamps
Replies: 49
Views: 199394

Re: Phono Preamps

Here's an interesting preamp from Dimitri:

http://www.angelfire.com/az3/dimitri/images/riaa.pdf