Yes, I should've mentioned...the guitar is connected when the radio signal comes through.Did you also add a guitar chord and/or guitar?
Okay, that would make sense! I'll give that a try!I believe what is needed is bypass capacitors on the power supply. If you have a large electrolytic capacitor and a 0.1 ufd or 0.01 ufd capacitor in your parts stash then put both of them across the power supply to filter it.
hgmjr
I'm not sure about the nearing AM transmitter...Radio is still coming across, after putting a 350uf cap across the power supply. When I'm ready to build I'll use a metal box for sure.If the power supply pin bypasses dont do anything, and I predict that they won't, I may have a fix. Building the circuit into a metal box will go a long way in fixing it. Putting an RF bead on the input wire, and possibly shunting the input pin on the PA with a 100pF or 470pF may help, too.
Question: How close to you is the nearest MW AM broadcast transmitter?
In addition to the 350ufd you will need to put a 0.1 ufd or a 0.01 ufd bypass capacitor across the power supply very close to the power pins on the LM386.I'm not sure about the nearing AM transmitter...Radio is still coming across, after putting a 350uf cap across the power supply. When I'm ready to build I'll use a metal box for sure.
Thanks for the suggestions!
In addition to the 350ufd you will need to put a 0.1 ufd or a 0.01 ufd bypass capacitor across the power supply very close to the power pins on the LM386.
/QUOTE]
I predict that this will not help, either
You are probably right but it is a cheap experiment nonetheless. These bypass capacitors are a good thing to provide as a general rule.I predict that this will not help, eitherIn addition to the 350ufd you will need to put a 0.1 ufd or a 0.01 ufd bypass capacitor across the power supply very close to the power pins on the LM386.