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    Okay gotcha, thanks

    Okay gotcha, thanks
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    Thanks guys... Hem I didn't say anything about...

    Thanks guys... Hem I didn't say anything about 15% below so not sure where you got that figure from.

    Customer says amp isn't as loud as it was before. Typical haha... so we are trying to measure...
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    G1 are Music Man amps truly what the stated RMS...

    G1 are Music Man amps truly what the stated RMS wattage is? It'd be the first amp company I know of where this is the case. IE a 100W Twin Reverb does not put out 100W of clean signal with no...
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    Additionally: It can't be an oscillation, because...

    Additionally: It can't be an oscillation, because upon pulling the PI, the bias slowly goes back down, about .1ma every 3 seconds. Quite strange... I can't think of anything that could cause this. ...
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    Hey folks.... got one in with this problem. It's...

    Hey folks.... got one in with this problem. It's a TSL 122. But as mentioned early on in this thread... the bias only drifts (high) if the phase inverter is in place. Which leads me to suspect an...
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    Samsung lns3251d overscan

    Hey all,

    Anyone know why this happens or how to fix it?

    I have a Mac mini connected via HDMI to the TV in the subject. Everytime my Samsung sleeps, the aspect ratio on the TV gets messed up. ...
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    Thank you sir! I've been on a real estate...

    Thank you sir! I've been on a real estate investing adventure for the last 1.5 yrs so haven't been doing as much amp work. Still love audio electronics though! And this forum is incredible... love...
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    Lifted the anode of the bias diode, removed the...

    Lifted the anode of the bias diode, removed the 120k dropping resistor, floated the junction of the two, ran a floating wire to the 33k/15k junction. Fixed. Conductive board.
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    Lifted the anode of the bias diode, removed the...

    Lifted the anode of the bias diode, removed the 120k dropping resistor, floated the junction of the two, ran a floating wire to the 33k/15k junction. Fixed. Conductive board.
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    Cheap pcb boards, bad design. I had this issue...

    Cheap pcb boards, bad design. I had this issue in this thread from a while back. https://music-electronics-forum.com/showthread.php?t=43711&highlight=mesa+rocket

    I now have the same model amp on...
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    I have another one of these on my bench. Guess...

    I have another one of these on my bench. Guess what the issue is. Yep, the same. This is not the same amp I worked on before, it still has the stock 120k resistor in the bias supply. I'm still...
  12. Thread: Crate BX50 DLX

    by lowell
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    Thanks guys... I'll skip replacing all those...

    Thanks guys... I'll skip replacing all those components then for now. I already checked opamps for DC offset.

    Not a speaker issue... forgot to say I tried others
  13. Thread: Crate BX50 DLX

    by lowell
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    Crate BX50 DLX

    This came in with a blown TDA output chip. Replaced it and now it's working, however it has a gated/farty distortion thing going on. It's even worse on the lead channel. So it's common to both...
  14. Thread: TDA2050

    by lowell
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    Thanks for the help guys and sorry for the late...

    Thanks for the help guys and sorry for the late reply! haha
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    Yup thanks.. they're plastic jacks anyways

    Yup thanks.. they're plastic jacks anyways
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    He misspoke :D Happens in and out of chassis

    He misspoke :D

    Happens in and out of chassis
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    Tech pardner chiming in. It has the ICEPOWER...

    Tech pardner chiming in.

    It has the ICEPOWER module. The output goes into protection/shutdown when the SHIELD of the speaker cable plug is touched. This happens with speaker jacks IN AND OUT of...
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    Sticky: Have 3 Blues Jr III's in the shop from a local...

    Have 3 Blues Jr III's in the shop from a local church. All have that same obscure symptom. All have the same repair as well - open Rscreen. Pulling the PI cures the oscillation/measurement issue! ...
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    Sticky: Twist the OT primaries?

    Twist the OT primaries?
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    Sticky: Ahhh… right. Hence the disaster that breaks...

    Ahhh… right. Hence the disaster that breaks loose when you connect primaries in reverse when replacing an OT.
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    Sticky: BRILLIANT... thanks guys! I knew it was...

    BRILLIANT... thanks guys! I knew it was something more obscure. Perfect solution, if pulling the PI works.

    Question though, since global feedback is NEGATIVE feedback, how is this being...
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    Sticky: Blues Jr III Universal issue

    Guys, the last 3 blues JR III's I've had in have the same odd issue happening. When I try to measure plate volts on one side (blue) of the OT I get audible hum, and the voltage is quite a bit higher...
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    Kustom 2-15k-4 oddball

    Cant find ANYTHING online or via search in the forum. Anyone have one? Gonna need to source or build a footswitch for it as well as recap it. It's a 4-pin footswitch jack kinda similar to a DIN.
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    Thanks guys... yeah the piezo idea sounds very...

    Thanks guys... yeah the piezo idea sounds very cool... but not cost effective from a labor standpoint and we're already over budget as this amp has had so many drifted resistors... and every single...
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    Gotcha. So anyone know what the transducers...

    Gotcha.

    So anyone know what the transducers tend to measure DC resistance wise for the reverb tank? Reverb squeals when I turn up the Reverb control or Threshold. I get 12M on one coil and 6M on...
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    Agreed! Was tricky though cause everything...

    Agreed! Was tricky though cause everything seemed mostly in line... except for the low screen voltage. And it's hard to know if it was truly low because the schematic doesnt have voltages. But my...
  27. Thread: Deoxit D5

    by lowell
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    I really lubed up a conversation there didnt I?

    I really lubed up a conversation there didnt I?
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    Oops sorry guys haha. Welp... ofcourse right ...

    Oops sorry guys haha. Welp... ofcourse right after posting the trem came alive. My guess is I pulled out and put in the 6au6 enough times to clean the socket.
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