Search found 18 matches

by Bill Wilson
Mon Dec 28, 2015 1:24 am
Forum: Document
Topic: TI Parts Going End of Life
Replies: 20
Views: 28314

Re: TI Parts Going End of Life

Another TI part now listed by Mouser at end of life for the dip8 package, LME 49860. It will still be available in SOIC. Only problem is I do not want to go SMT as yet. It is the only one in the series to run on +- 22vdc.
by Bill Wilson
Mon Mar 16, 2015 10:23 am
Forum: Pro Audio Design
Topic: Limiters with optocouplers
Replies: 48
Views: 98728

Re: Limiters with optocouplers

Go online at Rolls Audio; look up the manual for the 422 field mixer. You will find a limiter implementation using vactrols & also low freq. cut on the output of their transformer less mike preamps.
by Bill Wilson
Mon Mar 16, 2015 10:19 am
Forum: Pro Audio Design
Topic: Voltage follower for high-pass
Replies: 11
Views: 22659

Re: Voltage follower for high-pass

Hi Carlmart: The simplest way to get some low freq. roll off would be to have 2 values of coupling caps at the output of the 1510 mike pre; one to give flat response down to approx. 30 hz & another that rolls off the low end at 6db per octave starting the roll off at 150hz. This is the method used b...
by Bill Wilson
Sun Jan 01, 2012 1:29 am
Forum: Build
Topic: M/S codec finished (pics)
Replies: 8
Views: 19076

Re: M/S codec finished (pics)

Great looking chassis mount Holger, the green is a nice looking color.

The company I worked for used 8 pin Limo connectors on the camera controllers; very high quality machined connectors. We were paying $39.00 for them; their coaxial video connectors were $33.00 ea.
by Bill Wilson
Sat Dec 24, 2011 11:46 am
Forum: Document
Topic: 9 Volt Battery End of Life Voltage
Replies: 2
Views: 5734

Re: 9 Volt Battery End of Life Voltage

The wireless systems I use for video production, use rechargable Lion's not alkaline based. That said fully charged 8.2-8.4 volts; minimum operating voltage 7 volts. They are rated 600mah's & run the receiver that draws 76 ma. for a good 8 1/2 hours.
by Bill Wilson
Sun Oct 23, 2011 6:43 pm
Forum: The Peabody Lounge
Topic: Heathkit is Back! Or, is it?
Replies: 20
Views: 30075

Re: Heathkit is Back!

When I left as service manager of the Nashvile MCI dealer in early 78 to open my own studio equipment sales, service & design co.; most of my test equipment was Heaths laboratory series built from kits. The compliment consisted of 2 channel scope, 2 ac vtvm's, linear/log swept function generator, I....
by Bill Wilson
Thu Jan 13, 2011 8:28 pm
Forum: Document
Topic: SSL PPM Schematic
Replies: 2
Views: 8035

Re: SSL PPM Schematic

There is a nice VU/PPM meter amplifier by Ethan Winer that uses 2ea. 1458 dual op amps & has both VU & PPM meter ballistics w peak hold. There is also a circuit for a log amplifier in the article. The address is <>
by Bill Wilson
Wed Dec 08, 2010 4:27 pm
Forum: Document
Topic: The Man Behind the (Ribbon) Mic
Replies: 1
Views: 4511

Re: The Man Behind the (Ribbon) Mic

When I had my audio consultant/equipment sales & repair business in the 70's & early 80's, I was given a pair of 77DX ribbon mikes by the chief engineer of one of the studios who was a friend of mine. The basket on one looked as though someone had used it to drive nails with. Both mikes had blown ri...