tone vs. inductance

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pine
Posts: 97
Joined: Mon Feb 23, 2009 8:31 pm

Re: tone vs. inductance

Post by pine »

butwhatif wrote:so how do you know that it's not still there in some way, my guess it is --find a friend who might look at it
That is an excellent point.

I never thought getting rid of hash would be a problem, but there you go
Structo wrote:How did you have the choke situated on the chassis?
Unless it was oriented for the lowest noise and bolted down with the frame grounded to the chassis, it probably wasn't a very valid test.

Your amp sound like it has the same issue as mine.
Although I have given up for now.
Another excellent point. The choke was bolted down exactly where the other one was, in the only place it would fit. I also tend to run out of steam after a while trying to track down parasitics, I find it really cuts into my practicing time
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pine
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Re: tone vs. inductance

Post by pine »

talbany wrote:The only thing that comes to mind right off is a voltage issue there.. Resistors will drop more voltage than a choke will.. Generally around 10-15 volts.... Did you check your voltages after you installed the choke?...


Tony VVT

I did in fact, they were all within 1-2 volts of the pre-swap voltages
talbany
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Re: tone vs. inductance

Post by talbany »

all within 1-2 volts of the pre-swap voltages


What value resistor is in there.. 1-2 volts seems kind low to me..



Tony
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pine
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Re: tone vs. inductance

Post by pine »

The resistance of the two different chokes you mean? They were both about 100 ohms. I didn't change anything else in the amp.
talbany
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Re: tone vs. inductance

Post by talbany »

Pine
Sorry thought you were going between a choke and resistor not 2 different chokes..You got a weird one there...



T
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pine
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Re: tone vs. inductance

Post by pine »

Just a shot in the dark here, is there any possibility that the overall capacitance of the circuit could cause the hash, and by changing a choke you could be changing the capacitance?
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Structo
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Re: tone vs. inductance

Post by Structo »

I don't think you are changing the capacitance but you are for sure creating a L/C filter network.

The choke and cap type filter is also known as a PI filter.

http://www.radio-electronics.com/info/c ... lc_lpf.php
Tom

Don't let that smoke out!
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