Oddvar R wrote: ↑Wed Jun 26, 2019 5:01 pm
Hi and thanks for a good answer. It's #183, and the reason I ask this under the "too high voltage", is because I was told to keep it to one post and not spread it around.
If you look at the pic, there is something that seems like 22m written on the pot, between pins. I am just checking so I don't miss out something.
When it comes to the coax, I figured it connects to the 100k, but since it differed from the one next to it, I just wanted to make sure.
The amp functions great on all other parts but the Overdrive section doesn't respond, so I am checking all possibilities.
no that's nothing.
It's a good idea when checking these things on the layout to look at the Schematic and you then see clearly what's connected to what.
I do check with the layout, but this build is, to be honest, a bit on the hard side. But now I am almost there, just need to figure out the Overdrive connections. I suspect I have connected some leads the silly way.
But it's fantastic that people like yourself invest time in helping others, much, much appreciated.
Oddvar R wrote: ↑Wed Jun 26, 2019 5:39 pm
I do check with the layout, but this build is, to be honest, a bit on the hard side. But now I am almost there, just need to figure out the Overdrive connections. I suspect I have connected some leads the silly way.
But it's fantastic that people like yourself invest time in helping others, much, much appreciated.
that's what forums are for I was asking the same questions as you not that long ago and with the help of people here I've learned a lot.
Oddvar R wrote: ↑Wed Jun 26, 2019 5:39 pm
I do check with the layout, but this build is, to be honest, a bit on the hard side. But now I am almost there, just need to figure out the Overdrive connections. I suspect I have connected some leads the silly way.
But it's fantastic that people like yourself invest time in helping others, much, much appreciated.
Oddvar, can you read a schematic? (Something else than a lay-out). It does make things a lot easier for you.
When the amp is in standby mode the relays are working, you could check the connection of the clean out to the Overdrive in when the Overdrive section is engaged. Set your MM in Ohm.
Oddvar R wrote: ↑Wed Jun 26, 2019 5:01 pm
Hi and thanks for a good answer. It's #183, and the reason I ask this under the "too high voltage", is because I was told to keep it to one post and not spread it around.
If you look at the pic, there is something that seems like 22m written on the pot, between pins. I am just checking so I don't miss out something.
When it comes to the coax, I figured it connects to the 100k, but since it differed from the one next to it, I just wanted to make sure.
The amp functions great on all other parts but the Overdrive section doesn't respond, so I am checking all possibilities.
Yeah I get that, I was just pointing out that it wasn't clear to me on this thread and I didn't know from the original thread if you even posted which one it was. Thus why one thread really helps, especially with a descriptive topic like
"New Build of #183, questions and problems" or something similar. Then you link to the schematic and layout you're using at the top of the thread and explain away. Then everyone know's exactly where things are. I think it all makes sense now.
As for the 22m I can barely see that too, but I have no idea why it's there, you can look on the schematic for #183 and look at the first volume pot and see there is nothing between wiper and earth as far as resistors go. Hope that helps.
I am getting better at deciphering schematics, and this time I've had to refer to it a lot, printed both the layout and the schematics on large spreads. Understanding the connections to the OD relay is the hard part. especially when it seems correct, but no sound.
Sounds like you’re close to the finish line. Relays seem to cause more problems for guys on this forum than almost anything else.
The only photos of your amp I can find are in this thread: https://ampgarage.com/forum/viewtopic.php?f=4&t=32112 . They aren’t clear enough (on my iPad, at least) to see the relay connections, and for some reason the aspect ratio gets weird when I tap on them to look at them in full size.
If you can, take and post some really clear, well lit, close up photos of everything associated with the OD.
drew wrote: ↑Thu Jun 27, 2019 7:18 am
Relays seem to cause more problems for guys on this forum than almost anything else.
Yep, relay's have caused me all kinds of trouble Oddvar R the main thing is to find out if you have polarised relays, because if you do then you might have to wire the coils differently to the layout i.e. swap the +/-
Oddvar R wrote: ↑Thu Jun 27, 2019 8:37 am
I have connected
Master to Com 1
220k to Com 2
Ground to NC 2
50n to NC 1 and NO 2 (Is this ok?)
Od volume to No1
I have tried a different board, same result.
I will try and change the polarity...
Your description is correct.
Now systematically go through this:
-Put your amp on stndb, and PAB and Drive off.
-Measure resistance between the 0.05uF(going to NC1/ NO2) and COM1: write down the result
-Put Drive on(you should hear your relay make a switching click)
-Measure resistance between the 0.05uF(going to NC1/ NO2) and COM 2; write down the result.
Let us know what you got on these, after that it is possible to look for (other) solutions.
Also what Marcus said: what relay did you use; specific brand and type we need to see what you have; write down and let us know.
And a good pic of the od relay.
I don't get any different reading when off or on, it's 0.8 ohm. I might hear some change in the buzzing but not significant. I presume off or on is the switch by the pedal outlet? I have included 3 pics, showing the route for what I think of as the negative voltage to the relay, coming from the , opposite the positive coming from the voltage regulator.
The relay board is loose, I have change it to see if that was any good.
Both relays are NTE R40 11D2 12, with an external 12v supply, showing 14,4 v going into the relay/led supply.
I am not sure how to measure the voltage regulator though.
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yes pedal outlet have 2 switches next to them.
The voltage from the relay filter to pedal and voltage regulator are both positive voltage. There is no negative voltage, only positive and ground.
To avoid misunderstandings can you exactly give the measurements on these:
Put your amp on stndb, and PAB and Drive off.
Measure resistance between the 0.05uF(going to NC1/ NO2) and COM1: write down the result
-Put Drive on(you should hear your relay make a switching click)
-Measure resistance between the 0.05uF(going to NC1/ NO2) and COM 1; write down the result.
What is your voltage on the od relay(yellow wire coming from the voltage regulator)? write down the result
Pls refer to these exactly,
Put your amp on stndb, and PAB and Drive off.
Measure resistance between the 0.05uF(going to NC1/ NO2) and COM1: write down the result
0.8 ohm
-Put Drive on(you should hear your relay make a switching click)
-Measure resistance between the 0.05uF(going to NC1/ NO2) and COM 1; write down the result.
0.8 ohm
No change in ohm, weather the drive is off or on.
And possibly the problem. I get no voltage reading from the voltage regulator?
I have enclosed a pic of it. The pins are as seen from left to right, pin 1, 2 and 3? Pin 1 from the diode side of the relay supply, 2 is ground and 3 is coming from the resistor side of the board?
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I was asking the same questions as you not that long ago and with the help of people here I've learned a lot.
