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Post by frets on May 15, 2021 13:02:14 GMT -5
This is intended to be a wiring that allows the guitarist to take all three pickups out of the circuit into a blower mode. It’s not a very complicated circuit but I need some other eyes on it. Newey can you take a look at it? I think it’s right. Thanks😺😺😺!!  |
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Post by ssstonelover on May 15, 2021 18:27:20 GMT -5
Hi Frets Blower mode means bypass of tone and volume (direct) correct? If so that means the ground for volume and the 2 tones needs to be disconnected when running blower, so they are not in the circuit. Seems to me the two sides of the SW3 need to be connected on the commons, and the Volume/Tone grounds should go through SW1 to create a disconnect in blower mode. I modified one of my 2019 diagrams to show that. I used a DPDT but the path info can easily go through a push-pull pot. See if this helps, as I think you may have an issue with your iteration.  |
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Post by reTrEaD on May 16, 2021 11:08:40 GMT -5
Hi Frets Blower mode means bypass of tone and volume (direct) correct? If so that means the ground for volume and the 2 tones needs to be disconnected when running blower, so they are not in the circuit. Seems to me the two sides of the SW3 need to be connected on the commons, and the Volume/Tone grounds should go through SW1 to create a disconnect in blower mode. Hi Bethany, For some people, blower means bridge pickup connected directly to the output with the volume and tone bypassed. For others, it means using whatever pickup(s) is(are) selected by the 5-way with the volume and tone bypassed (as you've done). While lifting the grounds for the volume and tone will work, imho there is a better way. One pole of the DPDT would be connected to the hot of the output jack. The throw for the 'normal' position of the switch would be connected to the wiper of the volume control. The other pole of the DPDT would be connected to the pole of the 5-way responsible for pickup selection. The throw for the 'normal' position would be connected to both the CW lug of the volume control and the pole of the 5-way responsible for the tone selection. One of the throws of the DPDT in the 'blower' position would be connected to the other pole of the switch. That achieves the direct connection to the output jack. Optionally, the other throw if the DPDT in the 'blower' position could be connected to one end of a resistor. The other end of that resistor would be connected to ground. The value of the optional resistor can be seasoned-to-taste. With no pots loading the pickup(s) the tone can sometimes be excessively bright and brittle. Using a resistor of 270k (similar to having one pot loading the pickups) will still be brighter than volume and tone at max. But probably not too bright.
A similar strategy can be employed in the case where the customer wants the bridge pickup selected as part of the 'blower'. |
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Post by ssstonelover on May 16, 2021 14:19:33 GMT -5
Hi Frets, I think your schematic will work. I was not used to that approach but after more thought to get it in my head overnight and this morning it seems OK to me. Hopefully newey and some others will weigh in too. Hi reTrEaD, I took a look at your alternative suggestion and made up a revised diagram based on my understanding of your thinking. Please see if there are errors and add any comments, as that will help my learning process. Interesting overall that there are several ways to 'skin the cat' and get the same result. Out of curiosity I know there was a lot of old talk about 'hanging coils' (but forgot now why people don't like them), but are 'lifted grounds' part of that discussion or is there another reason they are not a 'clean' approach?  |
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Post by frets on May 16, 2021 15:58:04 GMT -5
Thanks Ssstonelover and Retread😻, Unless I hear otherwise, I’m going to build with a cheapo Chinese pot and bench test. I always build stuff based on my schematics using cheap parts for testing. So, a no name $1.00 push pull and Alpha Taiwan pots. I have an old 5 way I use over and over again. Guys, if you are thinking of experimenting with different wirings, using the cheap parts first saves a lot of headaches. I’d hate to use a CTS push pull only to have it not work. Then you have all that cleaning to do with risk of burning the pot out. Here is a set on AliExpress  Ssstonelover, your diagrams are a thing of beauty🌸🌸🌸 |
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Post by reTrEaD on May 16, 2021 17:46:42 GMT -5
Hi reTrEaD, I took a look at your alternative suggestion and made up a revised diagram based on my understanding of your thinking. Please see if there are errors and add any comments, as that will help my learning process. Interesting overall that there are several ways to 'skin the cat' and get the same result. Out of curiosity I know there was a lot of old talk about 'hanging coils' (but forgot now why people don't like them), but are 'lifted grounds' part of that discussion or is there another reason they are not a 'clean' approach? A little bit that but also because (imho) the structure is a bit more straightforward and easier to understand. Your drawing isn't exactly what I had in mind. I butchered it so you can see what needs to connected. You might want to reorganize/reroute the wiring overall but have the same things connected.  |
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Post by ssstonelover on May 16, 2021 19:31:34 GMT -5
OK, looking good and very similar to Frets drawings LOL. It took a while to see its merits but I can see why you two might like that approach overall. Frets: cheap parts for prototypes, sure why not. Either that or lots of alligator clips and open cavities (too hard to do on a Strat setup...ah). Retread: OK, it should be now like your suggestion on this 2nd pass... Overall there seems to be a few more wires than with lifted grounds but if so just a few.  |
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Post by frets on May 17, 2021 21:29:52 GMT -5
Ssstonelover,
I think your changes are looking good😺! Is this a guitar you’ll have to go back into? I still haven’t had time to make mine. I’ll get to it.
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Post by newey on May 18, 2021 5:05:42 GMT -5
Is this a guitar you’ll have to go back into? Ah, yes, the ubiquitous problem with Strat mods- pickguard on, strings on, test, strings off, pickguard off, rinse and repeat . . . But several members over the years have the solution- either a two piece pickguard, so that the controls can be accessed by removing that portion alone, or hinging the pickguard at the cavity. I am frankly surprised that this isn't a commercially-available option for Strats yet (just throwing out a hint to our two Pros here !  ) |
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Post by Deleted on May 25, 2021 9:54:42 GMT -5
I don't know if you want the SW1 Push/Pull that way around
At the moment you have DOWN as going to Jack
and UP going to Volume
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