Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 28, 2017 1:26:20 GMT -7
Posted earlier on Antidote page; Any help would be appreciated!
Hi guys!
Played the Dote last night, what an incredible amp, loud AF! Tone for days! Used it through my Z Best 2x12. Different beast compared to my Route, but equally beautiful!
Awesome work Dr Z!
Only one minor downside, the EQ bypass switch doesn't work properly. When engaged, it hums like a madman (sounds like an open circuit) with no boost in volume and the EQ still works.... Will post this on the troubleshooting page too. I have the model which came with the boost switch without variable EQ.
Cheers!!
J
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Post by DRZ on May 28, 2017 2:09:52 GMT -7
To find if issue is in the amp or pedal here is a simple test. Get a new 1/4" jack, with nothing soldered on it, new , fresh , right out of the pack. Now plug that jack into the Boost female jack on amp back. This will open the circuit and engage boost. Removing it will return to normal operation. If this is the case then issue with pedal wiring , or pedal cable.
Did you buy the Antidote new?
Z
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 28, 2017 2:19:38 GMT -7
Thanks for the reply!
First of all, I would like to say I'm a real big fan of your work Mr. Z!
Concerning the Dote, I bought it new last wednesday from Haarguitars. It's a blonde head. Already used my trusty Fluke to measure the switch on the footswitch, it works, the cable seems to be good. Tried another footswitch pedal and it gave the same results. I have a new Neutrik plug lying around, so I will try that next. Will keep you posted...
Again, thanks Dr. Z!
Cheers!
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 28, 2017 2:50:59 GMT -7
Ok,
tried two new fresh jacks, same result... bummer...
cheers,
J
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Post by Maddog on May 28, 2017 5:40:32 GMT -7
Not to worry, brother....Doc will take care of you.... He always does... That dote is an awesome amp, huh???
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 28, 2017 5:54:47 GMT -7
Not to worry, brother....Doc will take care of you.... He always does... That dote is an awesome amp, huh??? Hey Maddog, It sure is, played it yesterday night, the sound engineer told me he sure likes my sound through the Z's! Nothing but compliments yesterday. It's a loud mutha though, had to use a Weber Mass on it with the High volume on 4 and the Normal on 2. The only thing that scared me was the loud bang and the hum after I switched the EQ bypass in.... (blew one side of the the front of house guy's headphone Nonetheless, having played vintage Marshall's all my life, played numerous boutique amps, these two are the best amps I've ever owned!
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Post by DRZ on May 28, 2017 7:21:05 GMT -7
OK it is a VERY simple circuit and I'm at a loss as what could be wrong. I honestly have not heard this issue before. It is only a switching 1/4 " jack, and a length of wire connected to Tone Stack Ground. You short the jack to engage the Tone Stack via the MID pot, open the circuit via the F/S to remove the Tone Stack. That's it.
Could the jack be loose and not making a good ground connection? Could the MID pot be loose and not making a good connection ? Do you have a good solid earthing to the amp head?
That is what I would look for first, if your positive it's not the F/S. Sorry for your inconvenience with this problem.
Also what is your Serial Number?
DR.Z
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 28, 2017 7:28:01 GMT -7
OK it is a VERY simple circuit and I'm at a loss as what could be wrong. I honestly have not heard this issue before. It is only a switching 1/4 " jack, and a length of wire connected to Tone Stack Ground. You short the jack to engage the Tone Stack via the MID pot, open the circuit via the F/S to remove the Tone Stack. That's it. Could the jack be loose and not making a good ground connection? Could the MID pot be loose and not making a good connection ? Do you have a good solid earthing to the amp head? That is what I would look for first, if your positive it's not the F/S. Sorry for your inconvenience with this problem. Also what is your Serial Number? DR.Z Hi there! Two pictures attached, serial number and gut-shot
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 28, 2017 7:35:04 GMT -7
Could the jack be loose and not making a good ground connection?
From what I can tell it is making ground electrical as well as mechanical.
Could the MID pot be loose and not making a good connection ?
Mid potentiometer is connected to ground
Do you have a good solid earthing to the amp head?
Amp is grounded.
Cheers and thanks Doc!
J
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 30, 2017 1:17:34 GMT -7
Opened up the Dote again this morning, tried to see if I could find anything strange. The problem still persists, tried several footswitches, same result. Loud bang when switching the tonestack off; loud hum. The amp works fine with or without a footswitch as long as the tonestack is engaged. Measure all grounds, which are solid, the only thing I can think of is this; Could it be that the wires from the treble pot to the tone stack treble capacitor and the phase invertor input capacitor (yellow and blue) are on the wrong lugs? Or maybe this is by design... I'm stuck here at the moment... help would be greatly appreciated!
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Post by DRZ on May 30, 2017 2:50:28 GMT -7
The Treble pot is wired correctly. BTW are you using a Z Footswitch, the one that should have been with the unit?
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 30, 2017 3:06:36 GMT -7
The Treble pot is wired correctly. BTW are you using a Z Footswitch, the one that should have been with the unit? Good morning! Yes, I'm using the original footswitch (it's the one without the variable boost). I'm numbed as to what might be wrong...
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Post by purpletele on May 30, 2017 7:39:12 GMT -7
The Treble pot is wired correctly. BTW are you using a Z Footswitch, the one that should have been with the unit? Good morning! Yes, I'm using the original footswitch (it's the one without the variable boost). I'm numbed as to what might be wrong... I'm wondering if it might be the bypass input switch. I know you were able to jump it, but it sure seems to be an obvious culprit.
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on May 30, 2017 7:48:20 GMT -7
Good morning! Yes, I'm using the original footswitch (it's the one without the variable boost). I'm numbed as to what might be wrong... I'm wondering if it might be the bypass input switch. I know you were able to jump it, but it sure seems to be an obvious culprit. My thought exactly! Don (repairs) is already jumped in to help out!
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Post by digs57 on May 30, 2017 11:51:00 GMT -7
I had same issue with maz 18 nr...cleaned the crap out of input and it helped and came back...cleaned it one more time gone...? I opened mine up as well...all good...so...variable's the way to go...being able to turn it down a scooch helps.
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on Jun 5, 2017 7:33:11 GMT -7
Resolved!
Turned the amp inside out and upside down and got the tonestack bypass circuit running!
Finally!
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Post by Maddog on Jun 5, 2017 9:11:58 GMT -7
Resolved! Turned the amp inside out and upside down and got the tonestack bypass circuit running! Finally! Did you find the exact cause of the problem?
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on Jun 5, 2017 9:26:54 GMT -7
Resolved! Turned the amp inside out and upside down and got the tonestack bypass circuit running! Finally! Did you find the exact cause of the problem? Hey Maddog! I sure did! (Sent Don at repairs a PM that I fixed it myself) If you want to know what it was I can explain in a PM! Cheers!
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Post by mudman on Jun 6, 2017 18:09:38 GMT -7
Did you find the exact cause of the problem? Hey Maddog! I sure did! (Sent Don at repairs a PM that I fixed it myself) If you want to know what it was I can explain in a PM! Cheers! Why not just explain here? I'm curious as to what happened as well.
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Post by premiumplus (Dave) on Jun 17, 2017 13:59:59 GMT -7
I guess the problem fell out when he turned it upside down. It would be nice to know what the solution was though. Hint hint nudge nudge...
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Jair Yess
Junior Member
Doctor doctor give me the news, I Got a bad case of loving you
Posts: 66
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Post by Jair Yess on Jun 18, 2017 2:55:54 GMT -7
I guess the problem fell out when he turned it upside down. It would be nice to know what the solution was though. Hint hint nudge nudge... Ok, what I did was; Since the amp was working fine without the footswitch (EQ circuit ON) and the boost function worked when disconnecting the ground to the mid pot it seemed obvious that the switching jack was the culprit. I ordered new ones, but they were in backorder. While growing impatient and frustrated why I could not find the problem I took the jack out of the chassis and disassembled it completely (pulled the metal inserts out of the jack housing) and found a little piece of wire between the switching contact and the common contact. All I had to do was put it back together again and slightly bend the metal switching insert so that it actually moved away from the common contact. Fixed!
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Post by Paul (TRANE) on Jun 18, 2017 11:13:13 GMT -7
I guess the problem fell out when he turned it upside down. It would be nice to know what the solution was though. Hint hint nudge nudge... Ok, what I did was; Since the amp was working fine without the footswitch (EQ circuit ON) and the boost function worked when disconnecting the ground to the mid pot it seemed obvious that the switching jack was the culprit. I ordered new ones, but they were in backorder. While growing impatient and frustrated why I could not find the problem I took the jack out of the chassis and disassembled it completely (pulled the metal inserts out of the jack housing) and found a little piece of wire between the switching contact and the common contact. All I had to do was put it back together again and slightly bend the metal switching insert so that it actually moved away from the common contact. Fixed! Wow! Great job! Very good diagnosing skills there. Glad you found it.
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