Home › Forums › Help/Technical Questions › ‘Heartbeat’ sound when Memory Boy Deluxe is in amp fx loop
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May 20, 2013 at 1:09 pm #83000azazel664Participant
I have recently taken delivery of a second hand Memory Boy Deluxe pedal primarily for its tap tempo function. Overall, I am happy with the pedal apart from one issue that is beginning to bug me.
I have the pedal in my amp’s fx loop and when my amp is on it’s drive setting, I can hear a rather annoying ‘heartbeat’ sound that is sync’d with the the tap tempo rate. I’ve checked all the patch cables, etc, but can’t seem to get rid of the noise. Is this to be expected or do I have a faulty pedal?
The ‘heartbeat’ noise doesn’t seem to be there when the pedal is put into the front of the amp rather than through the loop.
Anyone know how to fix this?
May 20, 2013 at 2:49 pm #119068Flick (EHX Staff)ModeratorQuote:I have recently taken delivery of a second hand Memory Boy Deluxe pedal primarily for its tap tempo function. Overall, I am happy with the pedal apart from one issue that is beginning to bug me.I have the pedal in my amp’s fx loop and when my amp is on it’s drive setting, I can hear a rather annoying ‘heartbeat’ sound that is sync’d with the the tap tempo rate. I’ve checked all the patch cables, etc, but can’t seem to get rid of the noise. Is this to be expected or do I have a faulty pedal?
The ‘heartbeat’ noise doesn’t seem to be there when the pedal is put into the front of the amp rather than through the loop.
Anyone know how to fix this?
How are you powering the Deluxe Memory Boy?
May 20, 2013 at 3:11 pm #119072azazel664Participantall the pedals on my board are being powered from a t-rex fuel tank classic. the DMB has it’s own (non-isolated) supply from the fuel tank.
May 20, 2013 at 5:21 pm #119077Flick (EHX Staff)ModeratorQuote:all the pedals on my board are being powered from a t-rex fuel tank classic. the DMB has it’s own (non-isolated) supply from the fuel tank.There’s a possibility that the DXMB is not getting enough current from the Fuel Tank. Can you try the same set up but using the DXMB’s power supply? The DXMB draws about 100mA.
If the heart beat sound goes away that means the Fuel Tank is not supplying enough power. If the heart beat still persists, then I’m not sure what it is at the moment.
May 22, 2013 at 7:38 pm #119085azazel664ParticipantQuote:Quote:all the pedals on my board are being powered from a t-rex fuel tank classic. the DMB has it’s own (non-isolated) supply from the fuel tank.There’s a possibility that the DXMB is not getting enough current from the Fuel Tank. Can you try the same set up but using the DXMB’s power supply? The DXMB draws about 100mA.
If the heart beat sound goes away that means the Fuel Tank is not supplying enough power. If the heart beat still persists, then I’m not sure what it is at the moment.
Hey Flick,
Powered the DXMB from it’s PSU rather than the fuel tank and all is OK! What I don’t understand is that with the DXMB connected to the fuel tank, the total current drawn for all the pedals is still within the fuel tanks max limit. Oh well, never mind, I’m happy now the noise is gone.
Thanks for the help.
Alan
May 22, 2013 at 10:30 pm #119086pimelodellaMemberHi azazel, perhaps I can contribute to this thread, I’ve been looking at power solutions lately. You should see http://www.talkbass.com/forum/f36/t-rex-fuel-tank-not-isloated-882502/ also http://www.pedalsnake.com/page.php?id=68 No publicity intented, I just find these interesting and share the info.
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