ubertech
Meter Reader 1st Class
Posts: 65
Likes: 0
|
Post by ubertech on Apr 9, 2014 4:38:15 GMT -5
ah no, unfortunately all was not well when I first put it together: neck half (seymour) was working as expected, but the bridge half (OBL) needed switch out, so both pickups were out of phase and I couldn't get N/B combinations in same phase.
Now all works well, apart from the parallel Bridge humbucker only, which phases with itself, so Im sure I've got the flow of one coil the wrong way round - trial and error later should sort it; definitely nothing to do with the schematic, just a pickup mismatch and I am confident the diagram will work as it is for an all Seymour setup
If not, I will save up and get the replacement slant bridge by seymour (they seem to be the only ones to make one that fits, though I know some people modify standard humbuckers) - the guitar is definitely worth it now. I've just dropped the action by filing the nut, and a little more fettling with a shim and it will be a totally useable gem, and its the only guitar in the studio that a MIDI pickup fits - I feel like I have a Les Paul Recording!
THANKS FOR HELPING ME WITH THIS - maybe you would consider putting the diagram in the 'finished' schematics section - lol
UT
|
|
|
Post by JohnH on Apr 9, 2014 7:21:48 GMT -5
What seems puzzling is how you can get an out of phase parallel humbucker, if the equivalent series setting is not Oop?
Screwdriver pull-off test (see reference section) may help sort out phases.
|
|
|
Post by newey on Apr 9, 2014 11:13:43 GMT -5
Or, perhaps a simple tap test to be sure that, in the parallel setting, both coils are indeed active. It may be that what ubertech is hearing is just one coil.
|
|
ubertech
Meter Reader 1st Class
Posts: 65
Likes: 0
|
Post by ubertech on May 1, 2014 14:45:53 GMT -5
Hi All - back again
I have road tested this for a while now and it is rock solid; the right combination of sounds - though I may eventually have a middle own switch if its worth it; I absolutely love the two outside single coils especially through a slow compressor to keep the guitar attack
All the singles are great, the parallels and full humbuckers are all fantastic, and its very logical and easy to select - though going from front single to bridge humbucker could do with a blow switch - maybe a 3 way micro switch to select full bridge/single mid/full neck, but that would just be for completeness. As it is it works fine and I highly recommend it for any HSH especially for a sloping bridge nighthawk
My question is this for volume:
I understand the volume cap is to retain the full treble at lower volumes and I quite like it (jury's still out), is there a cap that will dip the treble just a touch?
What rating should the resistor be? My volume is only effective over the bottom part of the travel - from max(10) to about 3 it still pretty much full on then between 3 and 0 the volume drops over the remainder of the travel, so I think I have the wrong resistor value - I elected for 500k log pots
Thanks for any advice in advance
|
|
|
Post by JohnH on May 2, 2014 2:26:15 GMT -5
Glad to hear it has worked out!
For the treble bleed, a 150k resistor and 1nF cap is usually optimal for a 500k log pot. It does flatten the taper, to somewhere between lin and log. It should result in a very nice taper. What you describe for the volume being not very effective above 3 sounds like what youd expect with a linear pot, or a smaller value resistor. What values do you have there?
if youd like the treble to roll off a bit with volume, but not as much as without treble bleed, try a smaller cap, say 0.56 or 0.68nF. You could then also use a higher resistor value which would have less effect on taper.
|
|
ubertech
Meter Reader 1st Class
Posts: 65
Likes: 0
|
Post by ubertech on May 16, 2014 8:40:29 GMT -5
Thanks JohnH
I think the res value was 100k, so i guess that's whats causing the taper to start at 3 to 0. I will try a larger value asap.
Btw the sounds from this guitar are great bar a slight microphonic tendency of the Seymour minibucker - didnt expect that one
I literally havent used another guitar in anger since completing the project. My favourite combos are s/c N+M or B+M out of phase (great Zepplin/Page quality), and H/B Neck with the treble rolled down to about 2 - stunning!! But basically everywhere is a good sound - definitely recommend it for any HSH guitar
|
|
|
Post by JohnH on May 16, 2014 15:30:29 GMT -5
Sounds good!
Given the TB resistor that you have, and your observation that you'd like a steeper pot taper, and some treble roll off, Id suggest trying 220k and 0.56nF. Or 330k and 0.33nF for more of a difference. I just ran these through my spreadsheet to test them. The sound should get slightly less treble in the 8 to 9 range, and be quite similar to full volume at low settings. If you increase the resistor with still a 1nF cap, it can get too trebly at low settings. Also, you can try taking the TB circuit out, like 99% of all the guitars in the world!
|
|
ubertech
Meter Reader 1st Class
Posts: 65
Likes: 0
|
Post by ubertech on May 17, 2014 12:30:22 GMT -5
Thanks
Im getting used to the TB now and I am going to try it as your first suggestion just increasing the resistor a little to get a better taper. Then I may experiment with the other combos, as they sound pretty cool.
At the moment Ive decided there is not enough earthing going on to the Neck pick up causing a buzz even in HB mode which decreases when I grab the strings, so Im going to check the earht strap to the bridge - there's a good chance it has lost its integrity with all the mods
|
|