Roland - AD-50 ( Double Beat )  [schematic]

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Re: Roland - AD-50 ( Double Beat )

Postby glops » 23 Sep 2011, 05:01

I just finished a second one of these. It's such an awesome fuzz. I'm going to box it up with a input cap switch. Choice between 1uf and .068uf. Instead of the rotary tone switch on the output, I will have an output cap blend knob. It's pretty killer...
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Re: Roland - AD-50 ( Double Beat )

Postby hiorgos » 02 Oct 2011, 05:31

glops wrote:I just finished a second one of these. It's such an awesome fuzz. I'm going to box it up with a input cap switch. Choice between 1uf and .068uf. Instead of the rotary tone switch on the output, I will have an output cap blend knob. It's pretty killer...


What diagram did you follow? I have been trying to debug mine without any success..
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Re: Roland - AD-50 ( Double Beat )

Postby glops » 08 Oct 2011, 02:41

I breadboarded from the schematic posted here and then perfed one from that. Then I did a shitty PCB layout for practice.
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Re: Roland - AD-50 ( Double Beat )

Postby fuzzbuzzfuzz » 30 Sep 2012, 11:50

To resurrect this thread (:))...

After scoring an AD-50 remarkably cheap and marveling at its wall of fuzzy goodness (even into a Roland JC-120!), I have only one minor gripe - common with a lot of these wah/fuzzes and that`s the fuzz > wah, cool but not so useful. As the boards are quite separate inside, so can I reverse the order to wah > fuzz, simply by unsoldering the respective wires and reversing them? Easy right?

Thanks

Pics:

http://fuzzbuzzfuzz.blogspot.jp/
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Re: Roland - AD-50 ( Double Beat )

Postby Nocentelli » 30 Sep 2012, 13:39

I also find wah->fuzz is usually best, unless you're deliberately going for that extreme filtered sound. You can easily swap the order just as you've described, though you might need to add some extra runs of new wire to route it, easily enough returned to stock with little or no sign if you're concerned about the effect on potential re-sale value. I'd be tempted to wire the "send to fx" input from the bypass switch to a 3PDT toggle wired as a "juggler" order switcher; Again, if you don't want to screw the original pedal, you could leave this inside set to wah-first with the option to switch it if you feel like screwing around - just put the whole switch and wire assembly in a ziplock bag to prevent shorts. RG keen and Beavis, amongst others, have diagrams+info on juggler circuits.
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Re: Roland - AD-50 ( Double Beat )

Postby Udonitron » 29 Mar 2013, 08:25

electrosonic wrote:I just happened to have my pedal open to replace a broken footswitch when I saw this thread - a little off topic I know.

A common complaint about the original pedal is that the voltage divider at the input to the wah section causes an audible volume drop when the wah is engaged. I have heard people recommend moving the input to the wah to the other side of the 47k input resistor, but this drops the input resistance from 80k (47k+33k) to 33k. What is a better solution? And more generally, why to wahs seem to have such low input resistances?

Andrew.


Yeah I too would like to know this...it is quite a drop in volume when the wah is engaged for sure.
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Re: Roland - AD-50 ( Double Beat )

Postby Udonitron » 29 Mar 2013, 08:25

electrosonic wrote:I just happened to have my pedal open to replace a broken footswitch when I saw this thread - a little off topic I know.

A common complaint about the original pedal is that the voltage divider at the input to the wah section causes an audible volume drop when the wah is engaged. I have heard people recommend moving the input to the wah to the other side of the 47k input resistor, but this drops the input resistance from 80k (47k+33k) to 33k. What is a better solution? And more generally, why to wahs seem to have such low input resistances?

Andrew.


Yeah I too would like to know this...it is quite a drop in volume when the wah is engaged for sure.
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Re: Roland - AD-50 ( Double Beat )

Postby astrobass » 26 May 2014, 23:49

I've got my hands on one of these and it appears to be all original inside, but the fuzz mode motorboats. Any suggestions re: what's causing that/what might be done about it?
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Re: Roland - AD-50 ( Double Beat )

Postby astrobass » 27 May 2014, 00:14

I should note that motorboating only occurs with the Sustain at or near max
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Re: Roland - AD-50 ( Double Beat )

Postby sadrew » 01 Jun 2014, 16:40

i would suggest to isolate the fuzz section and see if still has the problem

at least you know if the problem is in the fuzz or in the wah circuit and narrow your search

main suspect also might be out of range power supply voltage or cabling problem

let me know if you need more help
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Re: Roland - AD-50 ( Double Beat )

Postby astrobass » 02 Jun 2014, 20:50

Definitely fuzz only, and only with sustain in the top 10% of its range. So not a problem so much as a curiosity.
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Re: Roland - AD-50 ( Double Beat )

Postby jzilla » 25 Dec 2014, 01:58

hey guys

i'm building this using the vero layout. would you guys mind taking a look at my wiring diagram? i've got a couple questions:

1) what is the master out? is it a pot?
2) could someone help me with the 3PDT wiring?
3) does everything else look alright?

i couldn't find a small rotary switch that would fit in the 125B enclosure so i got a pcb mount and am planning on mounting it on a small piece of perfboard. hopefully it's clear what i'm doing in the attached diagram.

many thanks!!
-j
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Re: Roland - AD-50 ( Double Beat )

Postby jzilla » 27 Dec 2014, 02:05

i just sketched out this wiring diagram based on the vero layout:
Image

can some kind soul tell me if this is looking good? i highlighted the four areas that i'm not feeling confident about:
- the outlevel wipers 1&2
- the rotary switch (which is going to be a pcb mount rotary on a small piece of perfboard)
- the 3pdt wiring
- the grounding from the vero

i would be extremely grateful for some much needed guidance!

thanks!
-j

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Re: Roland - AD-50 ( Double Beat )

Postby jzilla » 27 Dec 2014, 02:08

ps please ignore the first diagram i posted. i'd like to delete that initial post but not sure how!
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Re: Roland - AD-50 ( Double Beat )

Postby Nocentelli » 27 Dec 2014, 09:55

You can't edit posts, but you can delete the attachment via user control panel->manage attachments. Just make sure you delete the right (wrong) one.
If you post a link to the vero you want to use, we might be able to provide more assistance.
mmolteratx wrote:absolutely zero commercial use allowed. If I find anyone selling these, I'll fly to your house and kick you in the nads. And you may or may not find yourself in trouble.
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Re: Roland - AD-50 ( Double Beat )

Postby jzilla » 27 Dec 2014, 17:52

Nocentelli wrote:You can't edit posts, but you can delete the attachment via user control panel->manage attachments. Just make sure you delete the right (wrong) one.
If you post a link to the vero you want to use, we might be able to provide more assistance.

thanks. i deleted the image. hopefully that helps clarify things a bit.

here is RnFR's vero layout that i'm using. thanks!
DOUBLEBEATVERO.png

-j
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Re: Roland - AD-50 ( Double Beat )

Postby jzilla » 31 Dec 2014, 17:39

Bumping this in hopes that anyone who's made this from the vero layout will take a quick gander at my wiring diagram. Huge thanks and happy new year!
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Re: Roland - AD-50 ( Double Beat )

Postby Nocentelli » 31 Dec 2014, 23:38

Your diagram is pretty close. The labels on the vero sow some seeds of confusion. The three "outs" on the right of the board are the three different tone outputs from the fuzz - they should be wired to the three throws of an SP3T, and the common connected to lug three of the 50k output pot (this is mislabelled as output level 1 on the vero). The switch doesn't need a ground. Lug 1 of the output level pot should be connected to ground where the vero states "output level 3". Lug 2 of the output pot goes to the footswitch as you've drawn it. I'd use sustain pot lugs 2 and 3 (instead of 1 and 2) to make sure gain increases with clockwise.
mmolteratx wrote:absolutely zero commercial use allowed. If I find anyone selling these, I'll fly to your house and kick you in the nads. And you may or may not find yourself in trouble.

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Re: Roland - AD-50 ( Double Beat )

Postby jzilla » 01 Jan 2015, 08:05

Nocentelli wrote:Your diagram is pretty close. The labels on the vero sow some seeds of confusion. The three "outs" on the right of the board are the three different tone outputs from the fuzz - they should be wired to the three throws of an SP3T, and the common connected to lug three of the 50k output pot (this is mislabelled as output level 1 on the vero). The switch doesn't need a ground. Lug 1 of the output level pot should be connected to ground where the vero states "output level 3". Lug 2 of the output pot goes to the footswitch as you've drawn it. I'd use sustain pot lugs 2 and 3 (instead of 1 and 2) to make sure gain increases with clockwise.


Very much appreciated! I think I've got it now. Will wire up shortly. Maybe my layout (despite it being sloppily hand-drawn) would be helpful to someone? The only thing I'm unsure about is the sustain pot lugs. I assume lug 2 stays put and what I connected to lug 1 before should be connected to lug 3?

Huge thanks and happy new year! [smilie=a_partyguy.gif]

Wiring Diagram v3:
Image
-j
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Re: Roland - AD-50 ( Double Beat )

Postby Nocentelli » 01 Jan 2015, 10:07

Happy new year! Yes, diagram is ok now, but I would disconnect the two ring lugs on the jacks (but leave the input ring connected to power negative): This way, you only need to unplug the input to cut the battery power.
mmolteratx wrote:absolutely zero commercial use allowed. If I find anyone selling these, I'll fly to your house and kick you in the nads. And you may or may not find yourself in trouble.

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