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Looper's Delight
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Hi there guys n gals, its been a long time but i have been way doing lots of musical things, amongst which I hav had the tops off all three of my edps and changed the resistors on the old obenheim to match the other two. i now have three echoplexes with the exact same specs and things seem to be going great... theres just one thing.... HUMMMMMMMMMM the oldest obenheim edp and white face gibson edp both work perfectly quietly no matter if they are grounded or not (im in the uk so a middle pin on a uk kettle cord goes to ground "earth") the black loop 4 edp+ however emits a craqzy humm from the moment that the kettle cord is inserted which goes up in volume as soon as the unit is powered up. i noticed that there are grounding traces on the pcb ....and the screws are painted...i have scratched away at the paint and made good contact to the ground spots on thr board..this has lowered the hum by i would say about 20% which also confirms to me that the issue is minimised if the flow can find a route to ground. If i use a kettle cord i have modified by cutting the ground ...silence!!! the problem cures itself..but this is electrically unsafe aqnd i would rather not if i can get around it..there seems no reason to imagine it cant be cued seeing as the older two units are fine. now opening the units and seeing them together confirms to me that the one thing that my blackface noisy unit has that the other two dont...is he EMI filter box which is attached directly to the power input, the other two have cord inputs that go traight into the circuit board. could anyone confirm if taking out this new emi filter type and replacing it with a straight to board connection could cure my problem (or at least not damage my echoplex) I cant find out if anything else has been altered in the blackface componant list that would mean i might nuke something by ommitting this emi filter.) any info what it is, what does it do..whats with the buzz etc would be really appreciated. thanks in advance Phill MyOneManBand From: anders_e_bergdahl@hotmail.com To: loopers-delight@loopers-delight.com Subject: New experiment with EDP Date: Tue, 10 Feb 2009 22:26:36 +0000 OK another clip. LiveLOOPing Live in this case means that i click record and start to play. No backing, live alone in the celler  so this is 100% improvised, i try to react to the loop and get some development..It's rather low volume microphone is a e609. Using both OD channel and clean channel, PAB (preamp boost) is on, most of the time. (i think, i'm not always sure on what i am doing when improvising) The looping device is a Echoplex Digital Pro that in the amps effects loop (post OD), there is also echo and a Catulator tube buffer in the effects loop. The amp is "The Snake" a Custom By Cougar Mystic Blue Star (100w 80's ODS style). Guitar is my latest soloway Swan, a aqua blue burst korina body with maple top and firebird style pups. The clip is named Chaos, harmony and back, one take no overdubs echo (and flanger during fade out) added in mix. Thats all LOOPing is FUN  http://www.soundclick.com/bands/page_songInfo.cfm?bandID=60485&songID=7321558 Any advice on how to develop my looping skills are welcome... Still need to learn to use multiple loops, this one is mainly feedback and some multiply plus insert stabs.. Upgrade to Internet Explorer 8 Optimised for MSN. Download Now |