Search found 5449 matches

by mediatechnology
Tue Dec 27, 2011 7:56 am
Forum: Document
Topic: Allied Electronics UTC Transformer 1968 Price List
Replies: 1
Views: 7502

Allied Electronics UTC Transformer 1968 Price List

UTC LS-33's for $24.00.

Keep dreaming.

Image
by mediatechnology
Sun Dec 25, 2011 5:28 am
Forum: Pro Audio Design
Topic: Common Mode Chokes
Replies: 18
Views: 31554

Re: Common Mode Chokes

Well, without regard to what the build-out resistors do in the time domain, they still reduce current demands and DIM-like distortion. So I guess the inductors do not completely taketh away. I need to measure the improvement I'm seeing in reduced RF at the line receiver input pins. These chokes do w...
by mediatechnology
Sat Dec 24, 2011 2:18 pm
Forum: Pro Audio Design
Topic: Common Mode Chokes
Replies: 18
Views: 31554

Re: Common Mode Chokes

What carefully-chosen build-out resistors give, inductors taketh away... I spent a lot of time grappling with maximally flat transient response by carefully choosing the optimum value of line driver build-out: http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=6&t=464&start=135 Th...
by mediatechnology
Sat Dec 24, 2011 11:47 am
Forum: The Peabody Lounge
Topic: Merry Christmas
Replies: 43
Views: 71681

Re: Merry Christmas

It took me decades to train everybody to not expect christmas gifts from me... Lucky you. Well, as our extended family grew it just got to be too much. It took me a decade of pleading the extended family to draw names. I was very unpopular. Then it became my Mom's idea to draw names and it suddenly...
by mediatechnology
Sat Dec 24, 2011 11:38 am
Forum: Document
Topic: 9 Volt Battery End of Life Voltage
Replies: 4
Views: 9829

Re: 9 Volt Battery End of Life Voltage

Thanks Bill. So about 7V on that system. I did discharge testing on Alkaline AA's for two different products using the ISD Chipcorders years ago and I found that on them - with those two relatively low current products - that the EOL was around 1.25 volts per cell. One of them was an intermittent du...
by mediatechnology
Sat Dec 24, 2011 7:35 am
Forum: Document
Topic: 9 Volt Battery End of Life Voltage
Replies: 4
Views: 9829

9 Volt Battery End of Life Voltage

Q: What is the typical end-of-life voltage for a 9V battery?

A: My smoke detector thinks it's ~7.3 volts open-circuit.

At what voltage do wireless mics and stomp boxes typically begin to fail?
by mediatechnology
Fri Dec 23, 2011 8:06 am
Forum: The Peabody Lounge
Topic: RIP Jurgen Haible
Replies: 0
Views: 6324

Re: RIP Jurgen Haible

Just saw this. Very sad. I admired his designs.
by mediatechnology
Fri Dec 23, 2011 8:05 am
Forum: The Peabody Lounge
Topic: Merry Christmas
Replies: 43
Views: 71681

Re: Merry Christmas

Merry Christmas everyone.

It's obviously been awhile since I stumbled into the Peabody Lounge.

Everyone got their shopping done? I'm off for groceries but the rest is done.
by mediatechnology
Fri Dec 23, 2011 7:27 am
Forum: Pro Audio Design
Topic: Common Mode Chokes
Replies: 18
Views: 31554

Re: Common Mode Chokes

John sent me the Jensen Comtran information he had collected over the years and has also pointed out elsewhere the role of the input transformer as a bandpass/band limiting filter. The Jensen archive is worthy of it's own thread. In high RF environments you just can't beat a good transformer... I do...
by mediatechnology
Fri Dec 23, 2011 5:20 am
Forum: Pro Audio Design
Topic: Common Mode Chokes
Replies: 18
Views: 31554

Re: Common Mode Chokes

I know I'm in a minority here but I like band limited signals.
I wouldn't be so sure about being in the minority.

I'll try and get us some 'scope photos.
They're not pretty...