Alan, some of the things you say don't pass the stink test. And I mean the one where you don't even have to lift your arm:
On September 30, 2006 at 21:01, Audible Solutions said...
On the
other hand he agreed with me that while such tests are
important they oughtn't to be done if they are paid for
by the client.
Copy and paste, I swear. Go back and read it. This guy said that if a client DOES pay for a test, you SHOULD NOT do it? That is what you said, right?
On October 1, 2006 at 00:10, Audible Solutions said...
Let's look at the Beldon 1694 as it specs out the best
of the Belden cables. It's capacitance spec is 16.2Pf/ft
and loss @ 10MHz .s .72 At 100 ft of cable that's 72
db
and 1620Pf
I will bet that one hundred feet of 18 gauge SPEAKER WIRE won't be down 72 dB at 100 feet at 10 mHz. Are you sure you read or copied this correctly? 72 dB is a damn effective spec for a rejection filter! And if we figure a probably excessively BAD response curve for the wire of, say, - 6 dB per octave, which is a first-order filter, not a hunk of cable, then this wire would be down, let's see
66 dB at 5 mHz, 60 dB at 2.5 mHz, 54 dB at 1.25 mHz, let's say 52 dB at 1 mHz, 46 dB at 500 kHz, 40 dB at 250 kHz, 36 dB at 125 kHz, 30 dB at 62.5 kHz, 24 dB at 31.25 kHz, 18 dB at 15.625 mHz, 12 dB at 7.8125 mHz, 6 dB at 3.9 mHz, 0 dB at 1.95 mHz
In other words, if this wire were so crappily made that it performed as a first-order filter, we could expect it to be flat to just under 2 mHz. Now, if its high frequency attenuation were any less than 6 dB per octave, we would soon have it performing with noticeable losses in the audio spectrum. I don't think this passes the stink test.
No, this spec does not pass the stink test.
Last edited by Ernie Bornn-Gilman
on October 1, 2006 00:54.
