Search found 516 matches

by emrr
Sat Jul 06, 2019 10:02 am
Forum: Pro Audio Design
Topic: Transistor Vbe Matching Using A Commutating Chopper-Based Circuit
Replies: 2
Views: 224

Re: Transistor Vbe Matching Using A Commutating Chopper-Based Circuit

Nice. I could have used that back when I was rebuilding a lot of Altec 9470A/9475A push-pull preamps. Those just don't work at all if vbe is out of scale or mismatched.
by emrr
Wed Jul 03, 2019 10:52 am
Forum: The Peabody Lounge
Topic: Something to ponder about IoT
Replies: 33
Views: 2443

Re: Something to ponder about IoT

Im beginning to explore replacing a security system, and starting to think about a cell based connection that I receive a feed from rather than a hardwired connection with 3rd party monitoring. I did find another 4 pack of 60W bulbs I'd misplaced, which were for a lamp under a water line that might ...
by emrr
Wed Jun 12, 2019 11:58 am
Forum: Pro Audio Design
Topic: A Discussion About True Power Summing for Stereo Compressors
Replies: 65
Views: 74729

Re: A Discussion About True Power Summing for Stereo Compressors

Thanks, will report back once tested.
by emrr
Wed Jun 12, 2019 11:39 am
Forum: Pro Audio Design
Topic: A Discussion About True Power Summing for Stereo Compressors
Replies: 65
Views: 74729

Re: A Discussion About True Power Summing for Stereo Compressors

Dual single shaft pot I assume, has to be.
by emrr
Wed Jun 12, 2019 10:46 am
Forum: Pro Audio Design
Topic: A Discussion About True Power Summing for Stereo Compressors
Replies: 65
Views: 74729

Re: A Discussion About True Power Summing for Stereo Compressors

The only comp I can think of offhand with a weighting control is the Manley/Langevin ELOP.
by emrr
Wed Jun 12, 2019 10:06 am
Forum: Pro Audio Design
Topic: A Discussion About True Power Summing for Stereo Compressors
Replies: 65
Views: 74729

Re: A Discussion About True Power Summing for Stereo Compressors

This thought directly modifies the existing DIY product that started this forum, which had a single side chain with one set of controls, RMS detector pin 5 joined and VCA pin 15 joined.
by emrr
Wed Jun 12, 2019 9:32 am
Forum: Pro Audio Design
Topic: A Discussion About True Power Summing for Stereo Compressors
Replies: 65
Views: 74729

Re: A Discussion About True Power Summing for Stereo Compressors

Yeah Wayne, you got it. Ends up in mono in a mix. Both sources need compression that track each other to avoid changes in sonic texture, yet bleed in the mic is always a problem. Letting the DI be all of the side chain source is the easiest path, but some weighting control might really be the most i...
by emrr
Tue Jun 11, 2019 4:03 pm
Forum: Pro Audio Design
Topic: A Discussion About True Power Summing for Stereo Compressors
Replies: 65
Views: 74729

Re: A Discussion About True Power Summing for Stereo Compressors

Stupid question: How would one vary the amount of interaction between, say, a pair of 4301 detectors in a stereo comp with a single side chain? I envision leaving pins 15 EC+ connected to each other. 0% and 100% are obvious (pin 5 connected, or not), but 50% is not. Resistive isolation? Other? No go...
by emrr
Thu May 23, 2019 9:43 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 957
Views: 351575

Re: Entropy

mediatechnology wrote:
Wed May 22, 2019 9:33 am
emrr wrote:
Wed May 22, 2019 8:17 am
Replaced one of two HVAC systems on the studio building. 2nd one immediately needed service, and it's not long from being replaced too.
Ouch.
What is the current flavor of Freon used in new installs?
Mine is R-22 IIRC.
I needed R-22.
by emrr
Wed May 22, 2019 8:17 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 957
Views: 351575

Re: Entropy

Replaced one of two HVAC systems on the studio building. 2nd one immediately needed service, and it's not long from being replaced too.