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Old 1st May 2006, 03:19 AM   #1
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Join Date: Sep 2005
Default Simple amp is a radio , what to do ?

Built this amp for a small practice amp for guitar but it is picking up the local radio station when turned on . What do I need to do to block the radio station ?
Radio tower is about 1000 yards away clear line of sight.

Thanks for any suggestions.
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Old 1st May 2006, 04:36 AM   #2
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Join Date: Jul 2003
Location: Dona paula, Goa
Use RC (1K and 390pF) filter at the input, put the amp in a metal box and use shielded cable for connecting the input signal.

Gajanan Phadte
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Old 1st May 2006, 03:13 PM   #3
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Thank you , right now it has the shielded cable and is just the pcb mounted inside the wood cab in a seperate compartment from the speaker .

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Old 6th May 2006, 11:30 AM   #4
Rahul is offline Rahul  India
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Join Date: Mar 2004
Location: Lucknow , North central India
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Put a 1Mh RFC at the input and ground 560pf from both the end.
We can make it work
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