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Rich_S
Silver Member
USA
219 Posts |
 Posted - 01/20/2010 : 19:35:59
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Gimme a D! Gimme an O! Gimme an H!
What's that spell? DOH!
I've been having progressively-increasing problems with my pedalboard. Noises that were never there before, RF interference, hum. I've used the same setup for years, but lately it's been noisy. The CE-2's clock audibly ticking through the amp was a really annoying one.
My board is kind of weird. I designed it back in the 80's before we had velcro-covered boards you could buy at GC. Before there was such a thing as a pedalboard power supply, or even a OneSpot. So, I built my own power supply - it's buried down inside the board.
I realized something yeterday - my pedal count has increased over the years. So I totaled up my current draw and guess what? I'm drawing up to twice what my little 7809 regulator can handle, and I'm presently two pedals short of my full complement.
DOH! What a bone-head.
So, I disconnected my supply, wired in a spare 9-volt input jack, and powered the whole thing off my stand-by OneSpot. Magic! The whole board is quieter, and the CE-2 stopped ticking. That poor little regulator chip was just working too hard. It was perfectly alright back in the 80's when all I had was the CE-2, BF-2, and a pair of DD-2s. These days, just the super-bright LEDs are enough to over-tax a 100mA regulator.
Instead of building a new, bigger supply, I'm going to permanently-mount the 9-volt jack and stick with the OneSpot. That way, if it ever craps, I'm just $20 and a visit to GC away from replacing it.
Gimme a DOH!
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Edited by - Rich_S on 01/20/2010 19:36:34 |
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nosi0
Gold Member
Netherlands
511 Posts |
Posted - 01/20/2010 : 20:00:10
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| I'm busy builing my own supply but all outputs are seperated using 8 7809's so i shouldn't have that problem. do the high output LED's really draw that much? well i guess they are like 5 mA or so. |
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zerksies
Double Platinum Member
USA
3406 Posts |
Posted - 01/20/2010 : 21:22:52
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| good to hear that the board has lasted all theses years, hey you got pics |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 01/20/2010 : 21:32:37
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quote:
Originally posted by nosi0
I'm busy builing my own supply but all outputs are seperated using 8 7809's so i shouldn't have that problem. do the high output LED's really draw that much? well i guess they are like 5 mA or so.
Many high output LEDs on pedals are run at a couple of milliamps... to stop you being blinded. The one I use in the HZD is run at less than 1mA.
I've been wrong once already today, so I'm not gonna stick my neck out and say there are no pedals with 20mA LEDs in them  |
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Rich_S
Silver Member
USA
219 Posts |
Posted - 01/20/2010 : 22:04:13
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quote:
Originally posted by zerksies
good to hear that the board has lasted all theses years, hey you got pics
Picks of a couple revisions back are in the usual thread. I'll post new ones when the latest changes are done. |
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FRANZONI
Double Platinum Member
Ireland
3543 Posts |
Posted - 01/21/2010 : 15:57:22
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quote:
Originally posted by Rich_S
The CE-2's clock audibly ticking through the amp was a really annoying one.
So, I disconnected my supply, wired in a spare 9-volt input jack, and powered the whole thing off my stand-by OneSpot. Magic! The whole board is quieter, and the CE-2 stopped ticking. That poor little regulator chip was just working too hard.
I have a analogue Dynacord rack unit that ticks sometimes as well..it runs off 240v.. i switch it off and back on and it stops,would it be something in the power supply that causes this or is it just in the nature of analogue BBD devices to do this sometimes as they get older...?.........
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Dirk
Platinum Member
Netherlands
1309 Posts |
Posted - 01/21/2010 : 17:34:00
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Maybe, the clock in my CE-3 is ticking annoyingly when used in combination with my amps dirt channel, it's probably always there but you just can't hear it in front of a clean sound.
It happens either run off a battery and a PSA adaptor, the pedal is modified for PSA use btw. |
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jackderringer
Silver Member
USA
153 Posts |
Posted - 01/22/2010 : 23:57:20
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quote:
Originally posted by Laurie
I've been wrong once already today, so I'm not gonna stick my neck out and say there are no pedals with 20mA LEDs in them
...i've done this and yes i damn near blinded myself. i still have to get around to fixing that. i've gotten by just avoiding looking directly down at it. |
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Foulacy
Bronze Member
USA
65 Posts |
Posted - 01/24/2010 : 01:08:41
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| i found that any of the old boss modulation effects make a ticking sound when used with a one spot that is also plugged into a distortion pedal (and the distortion pedal is on but no playing). my bf-2 is the worst of them all when the rate is high. |
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Gimme a D!
