PS - Jon Risch - Propeller Head Plaza

Posted by Jon Risch (B) on October 21, 2004 at 21:29:09

In Reply to: Re: Where is Jneutron when we need him :) posted by Jon Risch on October 21, 2004 at 21:14:08:

I forgot to mention one other possible problem with the Bluejeans Cable IC hum tests.

E. They do not specifically state whether or not the source end of the IC was connected, that is, it may have been an open circuit. Normally, in use, a cable has a source circuit connected to the input end, and this source circuit has an output impedance, which is usually quite low.

If they did not connect the cables to a source, and left them open circuit, this to would be unrealistic, and not representative of the real world. In fact, if this were the case, then the floating shield for the 1800F would have truly been left floating! It would have had no ground connection at all (they said they connected it to the ground of the RCA at the source end, but said nothing about connecting it to single ground via a source component!), and thus, the test would have been a false representation of what the cables would actually do in the real world.

Jon Risch

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Follow Ups Full Thread

Topic - Whether to terminate IC shield to ground with a Cap or not? - Tony Montana 15:30:13 10/20/04 (14)

Re: Whether to terminate IC shield to ground with a Cap or not? - Jon Risch 18:00:05 10/21/04 (9)

Where is Jneutron when we need him :) - Tony Montana 19:54:25 10/21/04 (8)

Re: Where is Jneutron when we need him :) - jneutron 11:20:54 10/25/04 (2)

Speaking of the devil :) - Tony Montana 21:56:00 10/25/04 (1)

Re: Speaking of the devil :) - jneutron 07:11:16 10/26/04 (0)

Re: Where is Jneutron when we need him :) - Jon Risch 21:14:08 10/21/04 (4)

PS - Jon Risch 21:29:09 10/21/04 (3)

Maybe you should have e-mailed Kurt. - jneutron 11:13:27 10/25/04 (2)

Re: Maybe you should have e-mailed Kurt. - Tony Montana 22:06:27 10/25/04 (1)

Re: Maybe you should have e-mailed Kurt. - jneutron 07:29:41 10/26/04 (0)

Re: Whether to terminate IC shield to ground with a Cap or not? - blackrock john 09:04:52 10/21/04 (0)

Re: Whether to terminate IC shield to ground with a Cap or not? - Top Jimmy 23:49:45 10/20/04 (2)

Re: Whether to terminate IC shield to ground with a Cap or not? - Tony Montana 20:03:10 10/21/04 (1)

Re: Whether to terminate IC shield to ground with a Cap or not? - Jon Risch 21:21:36 10/21/04 (0)

Follow Ups

PS - Jon Risch 21:29:09 10/21/04 (3)

Maybe you should have e-mailed Kurt. - jneutron 11:13:27 10/25/04 (2)

Re: Maybe you should have e-mailed Kurt. - Tony Montana 22:06:27 10/25/04 (1)

Re: Maybe you should have e-mailed Kurt. - jneutron 07:29:41 10/26/04 (0)

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