Sunday, 27 March 2011
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Sheldon, if you follow all the wheeling and dealing that goes on over in the For Sale forum, you may know that I am now the proud owner of the Stormy Monday Blueburst Z3 (SN 4205) that you built in October 2009 for Morris (thanks, Nate). Another wonderful bass, as we have all come to expect from you! I've had it out on two gigs so far and have experimented for several hours at home. It has become clear to me that I would really prefer the bridge/middle combination to be in parallel rather than series. I know a lot of guys like that series combination, but to me, the output of two pickups connected in series is just too hot. When I switch to that position from the bridge/neck position, the change in output requires a large adjustment on the volume knob to compensate, or else I'll overdrive my wireless, not to mention becoming way too loud in the mix. I lowered the middle pickup before the second gig, but that pickup combination is still way too hot. I virtually never use that position on the selector switch on my other Dingwalls for that reason. So my question is can that modification be done and if so, how difficult would it be? I'm also considering DeepDee's mod where he reassigned the middle switch for the middle pup internal series/parallel selection (adding a push/pull pot for the mid EQ to preserve mid-frequency selection); however, I could live with the middle pickup hard-wired internally to series. I've used my Z2 to investigate all series/parallel combinations, comparing tones and relative volumes to decide which combinations I could do without on the Z3. The pickup selector mod that I described above is much more important to me. Thanks.
10 years ago
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#20082
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Just to add, if this is possible, is it also possible to have the Z3 wired: Bridge, MM in Series, Jazz in Series, Neck?
10 years ago
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#20083
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Both is possible. But it's not done in 5 minutes.
10 years ago
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#20087
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Hi Frank, congratulations on the new to you Z3. We don't offer the push/pull mid option but we do have circuitboards in stock for 3X series/parallel. As far as the rotary switch goes, we don't have a circuitboard for that combination but a switch could be point-to-point wired that way. A third option could be to treat it like a Z1 + a middle pickup. So a standard rotary switch hooked up to the bridge and neck pickups and use the middle toggle to add the middle pickup in parallel with the rotary switch.
10 years ago
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#20091
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Sheldon, thanks for the reply. Yeah I figured that the mod to hook up the middle pickup in parallel with the bridge pickup would be a point-to-point rewiring of the switch. However, could I impose on you to describe what I need to do (or need to have somebody do) to make this change. Thanks.
10 years ago
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#20092
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Your tech would have to understand guitar electronics pretty thoroughly. Disconnect the existing rotary switch, fab a new ground bus, hook up the wires to the new switch. We have a first generation Z3 rotary switch board with a trimmer pot. It works 100% except in passive it interacts with the tone control in an odd way if you roll down the series position. Another simple thing to try is to re-wire the middle pickup in parallel. Possibly the combination of that plus the lowered physical position might get you where you want to be.
10 years ago
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#20096
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Sheldon, I tried to emulate your option 3 using my Z2, lowering the middle pickup, and comparing the volume to the Z3 in other pickup combinations. Still a bit hotter than the other combination on the Z3 that I would predominantly use, but the delta is much less than with the stock wiring. And rewiring the internal coils of the middle pickup seems a lot easier than the other options. I will probably discuss option 1 (my original request) with my tech to see if we're comfortable with what needs to be done. Thanks.
10 years ago
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#20133
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Don't do anything just yet Frank. We are working on a solution.
10 years ago
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#20141
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[quote="Sheldon Dingwall":351t61lm]Your tech would have to understand guitar electronics pretty thoroughly. Disconnect the existing rotary switch, fab a new ground bus, hook up the wires to the new switch. We have a first generation Z3 rotary switch board with a trimmer pot. It works 100% except in passive it interacts with the tone control in an odd way if you roll down the series position. Another simple thing to try is to re-wire the middle pickup in parallel. Possibly the combination of that plus the lowered physical position might get you where you want to be.[/quote:351t61lm] Sheldon I've been having a similar problem on an '07 ABII-5 after installing a MII in the bridge position. Specifically, at right past about 5% roll off it sounds as if the tone control is almost rolled all the way back. Would love a fix for this. John H sent a wiring diagram fix a while back but I can't seem to locate it. For further reference, the roll off remains smooth in all 4 rotary positions with the Big Singles I installed in my other ABII-5 with the hybrid treble if that matters.
10 years ago
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#20147
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[quote:245k40jj]Don't do anything just yet Frank. We are working on a solution.[/quote:245k40jj] Sheldon, thanks for looking into this. I'll wait before doing anything.
10 years ago
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#20157
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[quote="Funkshwey":yk1oh53a][quote="Sheldon Dingwall":yk1oh53a]Your tech would have to understand guitar electronics pretty thoroughly. Disconnect the existing rotary switch, fab a new ground bus, hook up the wires to the new switch. We have a first generation Z3 rotary switch board with a trimmer pot. It works 100% except in passive it interacts with the tone control in an odd way if you roll down the series position. Another simple thing to try is to re-wire the middle pickup in parallel. Possibly the combination of that plus the lowered physical position might get you where you want to be.[/quote:yk1oh53a] Sheldon I've been having a similar problem on an '07 ABII-5 after installing a MII in the bridge position. Specifically, at right past about 5% roll off it sounds as if the tone control is almost rolled all the way back. Would love a fix for this. John H sent a wiring diagram fix a while back but I can't seem to locate it. For further reference, the roll off remains smooth in all 4 rotary positions with the Big Singles I installed in my other ABII-5 with the hybrid treble if that matters.[/quote:yk1oh53a] I'll run this past Jeff. What lug of the volume control does the output of the rotary switch go to?
10 years ago
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#20172
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There are a couple of choices here. Try installing a 100K trimmer pot between the hybrid treble and ground. This should allow you to adjust the total cut. Another idea is to replace the cap on the hybrid treble with a smaller value like .047 mf.
10 years ago
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#20188
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Sheldon would installing a P-Tone pu (series) in the neck mixed with a MII in the bridge restore the smooth roll off of the hybrid treble?
10 years ago
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#20200
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No, you'd have to do some tweaking or re-routing of signal. The problem with passive circuits is that each component affects the performance of the rest. So wire your pickup in series (MII) and it changes the effectiveness of your volume and tone controls. All that said, if you were to install a P-tone neck pickup, it's coils would be more similar to the MII bridge so any tweaks you did would work more consistently on both pickups.
10 years ago
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#20267
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[quote="amodeo@mitre.org":de8vfxx8][quote:de8vfxx8]Don't do anything just yet Frank. We are working on a solution.[/quote:de8vfxx8] Sheldon, thanks for looking into this. I'll wait before doing anything.[/quote:de8vfxx8] We have one final test to confirm that things function 100%. Then we'll have level adjustment on the series setting.
10 years ago
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#20268
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[quote="Sheldon Dingwall":2h47qv9m][quote="amodeo@mitre.org":2h47qv9m][quote:2h47qv9m]Don't do anything just yet Frank. We are working on a solution.[/quote:2h47qv9m] Sheldon, thanks for looking into this. I'll wait before doing anything.[/quote:2h47qv9m] We have one final test to confirm that things function 100%. Then we'll have level adjustment on the series setting.[/quote:2h47qv9m] 8) :!:
10 years ago
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#20269
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[quote:1u2ndk70]We have one final test to confirm that things function 100%. Then we'll have level adjustment on the series setting.[/quote:1u2ndk70] Sheldon, that's great, and would likely address my concern with unequal volume. However, I was thinking about the idea of point-to point wiring with the middle pickup added in parallel. Would it not be rather straightforward to wire a 2-pole, 4-position rotary switch as shown in this diagram? For simplicity I am showing two leads from each pickup, in reality it would be the output from the internal series/parallel switch (neck and bridge pickups) or hardwired series (middle pickup). Thanks.
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10 years ago
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#20374
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[quote="Sheldon Dingwall":1qn1j5dd][quote="amodeo@mitre.org":1qn1j5dd][quote:1qn1j5dd]Don't do anything just yet Frank. We are working on a solution.[/quote:1qn1j5dd] Sheldon, thanks for looking into this. I'll wait before doing anything.[/quote:1qn1j5dd] We have one final test to confirm that things function 100%. Then we'll have level adjustment on the series setting.[/quote:1qn1j5dd] Any results yet? :?:
10 years ago
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#20375
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No Z3's have come through assembly to do an in-test bass. All bench tests have passed though. Frank, that would work too.
10 years ago
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#20391
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[quote="Sheldon Dingwall":gjexjx7b]No Z3's have come through assembly to do an in-test bass. All bench tests have passed though.[/quote:gjexjx7b] I would be lucky to do the first test. :wink:
10 years ago
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#20394
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Sorry, too late. We're assembling that purple Z3 right now.
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