In our latest product we use 50 x 12v relays. To keep the power draw down I use a LM2596 dc/dc switch regulator turned down to +10v.
A LM7812 would have add 5VA extra power draw.
Search found 20 matches
- Wed Jul 12, 2023 1:59 am
- Forum: Build
- Topic: Mastering Stereo Insert Switcher with Flip Construction Information
- Replies: 31
- Views: 115655
- Tue Dec 06, 2022 1:48 am
- Forum: Document
- Topic: "Build An Audio Phase Detector," Charles Kitchen, Audio Magazine, January 1978
- Replies: 2
- Views: 17344
Re: "Build An Audio Phase Detector," Charles Kitchen, Audio Magazine, January 1978
Here's LED version that use a lot in the 90's.
https://worldradiohistory.com/Archive-E ... 990-12.pdf
https://worldradiohistory.com/Archive-E ... 990-12.pdf
- Tue Jan 23, 2018 9:12 am
- Forum: Document
- Topic: TI Parts Going End of Life
- Replies: 20
- Views: 43653
Re: TI Parts Going End of Life
Looks like the LM3914N-1 has reached it's end of life as well.
The PLCC20 version is more expensive
The PLCC20 version is more expensive
- Mon Jun 27, 2016 8:45 am
- Forum: Pro Audio Design
- Topic: Polyphenylene Sulphide Film Capacitor (SMD) in EQ filters
- Replies: 4
- Views: 15362
Re: Polyphenylene Sulphide Film Capacitor (SMD) in EQ filter
Thanx JohnP
Will try them in a prototype and make some listenings tests before I use them in production.
Will try them in a prototype and make some listenings tests before I use them in production.
- Mon May 02, 2016 9:13 am
- Forum: Pro Audio Design
- Topic: Polyphenylene Sulphide Film Capacitor (SMD) in EQ filters
- Replies: 4
- Views: 15362
Polyphenylene Sulphide Film Capacitor (SMD) in EQ filters
Does anyone around here have experience of Polyphenylene Sulphide Film Capacitor (SMD) in EQ filters?
- Tue Mar 10, 2015 2:20 am
- Forum: Pro Audio Design
- Topic: Voltage follower for high-pass
- Replies: 11
- Views: 32486
Re: Voltage follower for high-pass
Sallen-Key filter calculator.
http://sim.okawa-denshi.jp/en/OPseikiHikeisan.htm
http://sim.okawa-denshi.jp/en/OPseikiHikeisan.htm
- Mon Jan 26, 2015 6:11 am
- Forum: Document
- Topic: early solid state amp design
- Replies: 6
- Views: 11900
Re: early solid state amp design
Still have the light bulb test circuit on my bench that was descibed in the CS800 manual. Think I put it together back in 1978.
- Tue Apr 01, 2014 1:57 am
- Forum: Pro Audio Design
- Topic: Sphere Console VCA upgrade
- Replies: 10
- Views: 23173
Re: Sphere Console VCA upgrade
Isn't all info you need here? http://www.thatcorp.com/datashts/dn127.pdf
- Thu Feb 06, 2014 1:42 am
- Forum: Pro Audio Design
- Topic: Summing Left & Right but lowering Center information
- Replies: 21
- Views: 43737
Re: Summing Left & Right but lowering Center information
Zener voltage is 2.7v
The detector is a part of this compressors character so I think I will stay as close as possible.
The original designs combines the compressor and limiter CV's with parallelled transistors.
Thanx for the suggestions!
The detector is a part of this compressors character so I think I will stay as close as possible.
The original designs combines the compressor and limiter CV's with parallelled transistors.
Thanx for the suggestions!
- Wed Feb 05, 2014 6:16 am
- Forum: Pro Audio Design
- Topic: Summing Left & Right but lowering Center information
- Replies: 21
- Views: 43737
Re: Summing Left & Right but lowering Center information
Looks to be half wave, will soon know as I will build a prototype this week.