having me a significant frustrate
Man, I am not having luck building this thing. I'm at the test the psu step. i previously had gone the "LED reference route." When I first tested things, one LED lit up and one did not. I am a n00b and have no idea what I am doing so I pulled up the multimeter to try to figure it out. Eventually I got a spark and the other LED went out. After that I was getting about 37V on the rails for both +/-.
I have replaced the diodes in D7 and D8 after that. No luck, LEDs did not light up. Still getting about 37V. OK, I don't want to order anymore parts, let's see what happens when we at least try the "naked regulators" option. I should get 15V there too. But I'm not. I'm getting 29V in the attached.
The unshielded wire is a test of the naked regulators option. It isn't permanent.
Any ideas?
Man, I am not having luck building this thing. I'm at the test the psu step. i previously had gone the "LED reference route." When I first tested things, one LED lit up and one did not. I am a n00b and have no idea what I am doing so I pulled up the multimeter to try to figure it out. Eventually I got a spark and the other LED went out. After that I was getting about 37V on the rails for both +/-.
I have replaced the diodes in D7 and D8 after that. No luck, LEDs did not light up. Still getting about 37V. OK, I don't want to order anymore parts, let's see what happens when we at least try the "naked regulators" option. I should get 15V there too. But I'm not. I'm getting 29V in the attached.
The unshielded wire is a test of the naked regulators option. It isn't permanent.
Any ideas?
Attachments
I am aquiring the parts at the moment, and rummaging trough my parts box I came across a 2x115V, 23-0-23V toroidal transformer, which even has an extra 10V line (scavenged from a Hypex AD2.100 I believe).
I'm thinking this would be a good candidate for the Whammy, with the 10V winding perfectly suited to power a Muses volume pot for example.
But 23V would be too much I fear? I was planning on going with the LED reference version, and a green led with a Vfd of 2.1V, which leaves a lot of voltage to be dissipated..
I'm thinking this would be a good candidate for the Whammy, with the 10V winding perfectly suited to power a Muses volume pot for example.
But 23V would be too much I fear? I was planning on going with the LED reference version, and a green led with a Vfd of 2.1V, which leaves a lot of voltage to be dissipated..
Clearly Dennis is the smarter one from Toronto 
if you wired it for 240 by mistake instead of 120 you'd see 1/2 the voltage, not double. Ignore what I said (my excuse is that I was up really late for the past few nights)
Do you have any pictures of what the underside of the board looks like? All solder joints clean with no shorts?
if you wired it for 240 by mistake instead of 120 you'd see 1/2 the voltage, not double. Ignore what I said (my excuse is that I was up really late for the past few nights)Do you have any pictures of what the underside of the board looks like? All solder joints clean with no shorts?
Have you bought transformers from the same place? (j/k) but good illustration of what Dennis was saying:
Building a Pearl 2
Building a Pearl 2
I heard that Canada doesn't really exist. It's all mapleleaf (say it out loud).
I appreciate everyone's help. Let me get back to everyone. My multimeter stopped working. the nuhybrid went so well too.
i really want the led reference so i am going to redo that too. but i'm hearing that without much of a load everything may be working OK.
I appreciate everyone's help. Let me get back to everyone. My multimeter stopped working. the nuhybrid went so well too.
i really want the led reference so i am going to redo that too. but i'm hearing that without much of a load everything may be working OK.
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It measures 27v and 11,5V for the 23V line and 10V line respectively plugged directly into a wall socket, so regulation is right in that ballpark indeed. But going by some accounts it might still work out ok.
I will probably build the official Whammy board with a PC mount 18V transformer.
I had problems with ordering the boards with JLCPCB because of issues with the gerber files, so just before I got the opportunity to buy a Whammy pcb from a foum member, I had found gerber files of a three-pcb design of this schematic at theslowdiyer | DIY electronics and audio projects – at a snail's pace!.
In this design, the single pcb is split up into separate pcb's for the psu and the two channels.
So soon I will have the opportunity to experiment a bit, and I'll use this transformer when building out the three-pcb design
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Looking at the meter it shows 17.5 Volts. The meter is set to 30 Volts scale
So the top scale should be used. Am I wrong or anyone else see this?
Yeah super weird. I redid the cap and LED. When I plugged it in, Of course this focused on my hand, but I'm getting 36V across R13 and R14, and 37V across R9 and R10. D5 isn't working, and didn't work after plugging it in after sitting there for another half hour or hour. Bought extras of those. I have some time tonight to really look into it. And make sure I bought the right parts.
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Did you stuff R37 and R38 behind the caps?
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My cat Bob hates Canadians. He says they think they're superior because they live on top of us.
Riki
Hey Guys,
I have been building my Whammy a few months back and turn to you for help. I ordered the PCB plus parts kit and had a breeze building the amp. It works and produces wonderful sound. It however generates a significant amount of hiss, which ultimately turned me away from it. The amp has been collecting dust for a few months now and I want to fix the problem. Is there any obvious thing I am missing? I have been searching this thread and grounding the pot and RCA inputs helped with a hum, that I was having, but did not affect the noise floor. In the attached pictures you can see the current state of my Whammy. The RCA jacks currently have no ground connection, but that was for testing purposes alone (comparing ground noise with hiss etc). i am using a modushop aluminum case, if that helps.
Thanks a lot in advance!
I have been building my Whammy a few months back and turn to you for help. I ordered the PCB plus parts kit and had a breeze building the amp. It works and produces wonderful sound. It however generates a significant amount of hiss, which ultimately turned me away from it. The amp has been collecting dust for a few months now and I want to fix the problem. Is there any obvious thing I am missing? I have been searching this thread and grounding the pot and RCA inputs helped with a hum, that I was having, but did not affect the noise floor. In the attached pictures you can see the current state of my Whammy. The RCA jacks currently have no ground connection, but that was for testing purposes alone (comparing ground noise with hiss etc). i am using a modushop aluminum case, if that helps.
Thanks a lot in advance!
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