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#1
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Hammond A100- another hammond question
My m-3 has one key that the percussion isn't working on only in secord order
mode, not third. Is this something i can repair myself? I'd hate to move this damn thing again... P h i l i p ______________________________ "I'm too ****ing busy and vice-versa" - Dorothy Parker |
#2
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Hammond A100- another hammond question
You sure it's one key and not one note (in every octave)? It almost
has to be a dirty contact on the key itself. I have no idea how you get at it, but I'm sure it's right under the key. ulysses In article , Fill X wrote: My m-3 has one key that the percussion isn't working on only in secord order mode, not third. Is this something i can repair myself? I'd hate to move this damn thing again... P h i l i p ______________________________ "I'm too ****ing busy and vice-versa" - Dorothy Parker |
#3
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Hammond A100- another hammond question
Is it the top C?
LV Fill X wrote: My m-3 has one key that the percussion isn't working on only in secord order mode, not third. Is this something i can repair myself? I'd hate to move this damn thing again... P h i l i p ______________________________ "I'm too ****ing busy and vice-versa" - Dorothy Parker |
#4
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Hammond A100- another hammond question
yeah , it's on the top key board and it's the middle second D from the bottom.
Works in third order but not in second. I'll try cleaning it, I just thought it was odd that the percussion worked in one mode rather than not at all and just on one note. I'll check and make sure no other keys are affected, but I think it's just the one. thanks. P h i l i p ______________________________ "I'm too ****ing busy and vice-versa" - Dorothy Parker |
#5
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Hammond A100- another hammond question
Percussion tones are keyed through the same contact number/bussbar
regardless of frequency. Ergo, if the third harmonic sounds, the second harmonic *must* sound, since the signal path is identical. For the third to work and not the second, the *frequency* must be missing from the generator, or the wire which carries it to the manual chassis must be broken. Locate this particular frequency by playing the notes on either side of it and matching the pitches with the first white drawbar pulled out. (Don't pull that drawbar out while you are listening to the percussion tones - listen to those by themselves.) First locate the correct pitch of the percussion tone one half-step below the missing tone, and then pull a drawbar, find the pitch you just located, and play the key one half-step above it. I think you'll find you have a frequency missing. See if this frequency is missing at the same location on the lower manual. If it's there, you have a break in the manual-to-manual wiring harness. If it's missing on both manuals, you have a break in the generator-to-manual harness, or a broken wire on that note's filter assembly in the generator, or, worst case, you have a stuck tonewheel. Hammonds do not take well to being hacked by amateurs - once you find out what's wrong, call in a pro Hammond tech unless you have *mondo* tech service chops. Lord Valve American Fill X wrote: yeah , it's on the top key board and it's the middle second D from the bottom. Works in third order but not in second. I'll try cleaning it, I just thought it was odd that the percussion worked in one mode rather than not at all and just on one note. I'll check and make sure no other keys are affected, but I think it's just the one. thanks. P h i l i p ______________________________ "I'm too ****ing busy and vice-versa" - Dorothy Parker |
#6
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Hammond A100- another hammond question
That percussion circuit redeploys one of the busbar contacts for each of the
keys on the upper keyboard in order to trigger the effect. If you select "2nd harmonic", then the 4th drawbar (counting up from the left) is "redeployed" as the percussion trigger. If you select "3rd harmonic", then the 5th drawbar (again, counting up from the left) is "redeployed" as the percussion trigger. Try pushing in all the drawbars on the "percussion enabled" drawbar bank (second one from the left - ie, selected by "C" preset key for the upper manual), select 2nd or 3rd harmonic, and then pull out just the appropriate trigger drawbar. All you get is the percussion "plink". It's a cool electric piano-like effect! Of course, all of this applies only to the upper keyboard, and only to the second set of drawbars up from the left...that is the magic. To further add to the magic of the percussive "plink", the sound is only emitted when a single key is depressed on the upper manual. If you hold down a sustained note with one hand and then play a run with the other, there won't be any percussion on the notes in the run ... until you release the sustained note. Ahhh, don't even get me started on the joys of the A100's built-in reverb channel with its own dedicated tube amp! Anyway... uhhh... Yeah, it seems plausible that there could be a problem with one key and only with one of the two percussion harmonics. What happens if you turn off percussion, use the 2nd set of drawbars from the left, push in all the drawbars on that bank except for the 4th one, and then depress that problem D key on the top manual? Does it make contact? -Scott "Fill X" wrote in message ... yeah , it's on the top key board and it's the middle second D from the bottom. Works in third order but not in second. I'll try cleaning it, I just thought it was odd that the percussion worked in one mode rather than not at all and just on one note. I'll check and make sure no other keys are affected, but I think it's just the one. thanks. P h i l i p ______________________________ "I'm too ****ing busy and vice-versa" - Dorothy Parker |
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