Yes, but what's the goal? If you want to push the internal speaker and an external speaker at the same time, you would need to swap the internal to get the right ohm load with an external. If you just want to use an external cab without driving the internal speaker, you can disconnect the internal speaker and use the 1/4" output that drives it.
@@TheBrothaAB I see. Then the external and internal speaker should be 16ohm each to match the amp. Which in return means that the amp would be mismatched when played without an external cab.
I bought a pro junior used for my nephew and the guy lied about the condition when you play through it ---it is sort of whistling or howling sound wondering if you have come across this before i have searched everywhere online and there is not much about this. hoping it is just tube replacement or ...
It's hard to diagnose something in a comment section, but a bad preamp tube can cause the issue you're describing. The first step is to swap the two preamp tubes with each other. This is really just to see if you get a change. If you experience a change, we can be pretty sure that the issue is preamp tube related. If you have some spare preamp tubes, or if you want to upgrade the them to something like Groove Tubes - go ahead and change them for some new ones. If that doesn't fix your issue, take it to a qualified tech because the next step would be to open it up.
thank you i am testing tubes for microphonics first and replace tube that is not sounding right if that does not work then I will take it in to professional I appreciate you answering me.
I'm no fan of lead free solder by any means, but I've never zeroed in on it as the culprit for the issues that these amps (and the entire Hot Rod series) have with the tube PCB. I'll have to do some more research!
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could an xternal speaker out be added to this amp? thanks
Yes, but what's the goal? If you want to push the internal speaker and an external speaker at the same time, you would need to swap the internal to get the right ohm load with an external. If you just want to use an external cab without driving the internal speaker, you can disconnect the internal speaker and use the 1/4" output that drives it.
@@TheBrothaAB what is the ohm load on the internal speaker?
@@huanton2many 8 ohms
@@TheBrothaAB I see. Then the external and internal speaker should be 16ohm each to match the amp. Which in return means that the amp would be mismatched when played without an external cab.
sweet video,
I have two pro jr's , one MIM one US,
love em' both !
less closs ups of your ear , more close up OR table shots
xo
J
My dream is to have a camera angle directly above, looking down on the bench. I'm hoping in my next video I can make that happen.
I bought a pro junior used for my nephew and the guy lied about the condition when you play through it ---it is sort of whistling or howling sound wondering if you have come across this before i have searched everywhere online and there is not much about this. hoping it is just tube replacement or ...
It's hard to diagnose something in a comment section, but a bad preamp tube can cause the issue you're describing. The first step is to swap the two preamp tubes with each other. This is really just to see if you get a change. If you experience a change, we can be pretty sure that the issue is preamp tube related.
If you have some spare preamp tubes, or if you want to upgrade the them to something like Groove Tubes - go ahead and change them for some new ones. If that doesn't fix your issue, take it to a qualified tech because the next step would be to open it up.
thank you i am testing tubes for microphonics first and replace tube that is not sounding right if that does not work then I will take it in to professional I appreciate you answering me.
@@jamesklucky777 You're welcome! Keep us updated when the problem is solved.
@@jamesklucky777 do you solve the problem? I have the same on my pro junior 3
@@dar6497 it was the pre amp tubes that needed to be replaced!!! works great now
Привет!Зачем Вы стучали по лампам?
Those crap amps have lots of problems because of lead free solder. Designed by engineers manufactured and overseen by accountants!
I'm no fan of lead free solder by any means, but I've never zeroed in on it as the culprit for the issues that these amps (and the entire Hot Rod series) have with the tube PCB. I'll have to do some more research!
No disrespect, but you need to take a sledgehammer to pound on the tubes when testing them. Better yet, just smash them.
Seems like a lot of work to me.
Found the problem, broken tubes