Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Tode => Topic started by: MCurtis846 on June 02, 2015, 02:07:17 PM
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My tode amp picks up radio stations when used at my son's apartment in Buffalo. This does not happen at my home on Long Island. Any suggestions?
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Not sure if you got the answer I sent to your email about this yesterday. The Tode input stage is very sensitive, and if the pickup or cable is picking up RFI the amp will indeed amplify it. A very well shielded cable and shielding foil in the pickup cavities should help, if they are not already in place.
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Hi Doc. Thanks very much for your reply. The amp will pick up a radio signal when just the cable without the guitar is plugged in, so I suspect it is a cable problem. I have ordered a new, high quality shielded cable to try. If that doesn't work, I will try shielding the pickups and pick plate on the guitar. I'll let you know how I make out. Otherwise, the amp is simply amazing!!!!!! Thanks for the wonderful design!
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Sorry I am late to the party....
I have a Tode that I was originally going to build then sell (enjoy making the kits!). I tried it using it on a amateur radio piece of gear that required an amplified speaker. It sounded so good decided to hang on to it. Needless to say, it' in a strong RF field and was experiencing RFI. A good shielded cable with all metal plugs helped. A couple of Mix-31 ferrite snap on split beads did the job. RF was travelling down the outside of the cable and into the Tode. This is not unusual occurrence.
Best Regards,
Tim
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The OP solved the issue with a small filter box that had a phone jack input for a guitar cable and a short guitar cable to the amp. Inside the box is a 100 ohm series resistor in the hot leg and, IIRC, a 220pF cap from hot to ground. That could probably be installed in the amp very easily.