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Post subject: Bassbreaker 15 reverb constant noise
Posted: Sun May 13, 2018 2:50 am
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Hello everyone! Yesterday i noticed loud hum when using reverb of bb15. I swapped all preamp tubes and it didn't help. That's how it sounds like [youtube]https://youtu.be/EccDeDzXNho[/youtube]. Any suggestions?


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 1:13 am
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Link don't work :(

Did you ear noise with no guitar, nothing plug in the input ?

Did you put know good tubes in amp ? Or you use tubes in the amp ?
Noisy preamp tubes, ; put know good tubes
One weak EL84 could make noise ; put know good tubes
Dirty contacts on tubes and tubes socket; clean them with good contact cleaner like Deoxit

Broken solder in input jack or broken input jack; check and repair
Bad filter cap or broken solder on filter cap; check and repair


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 4:12 am
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https://youtu.be/EccDeDzXNho

Definitely noisy, but doesn't sound like hum, but that may just be due to limited cell phone audio quality.

No noise with reverb control turned all the way down?


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 4:23 am
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vinyl wrote:
https://youtu.be/EccDeDzXNho

Definitely noisy, but doesn't sound like hum, but that may just be due to limited cell phone audio quality.

No noise with reverb control turned all the way down?



Link work now.
Test must be done with nothing plug in the amp input


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 4:50 am
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stratele52 wrote:
Link don't work :(

Did you ear noise with no guitar, nothing plug in the input ?

Did you put know good tubes in amp ? Or you use tubes in the amp ?
Noisy preamp tubes, ; put know good tubes
One weak EL84 could make noise ; put know good tubes
Dirty contacts on tubes and tubes socket; clean them with good contact cleaner like Deoxit

Broken solder in input jack or broken input jack; check and repair
Bad filter cap or broken solder on filter cap; check and repair


I put all new JJ’s ECC83S in preamp section .
It didn’t help. With no guitar I hear same noise and it become louder than you turn up reverb. When reverb knob at 0 it doesn’t make any noise.


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 4:51 am
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vinyl wrote:
https://youtu.be/EccDeDzXNho

Definitely noisy, but doesn't sound like hum, but that may just be due to limited cell phone audio quality.

No noise with reverb control turned all the way down?


No noise at all when reverb knob at 0 even if guitar plunged in or not doesn’t matter


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 4:57 am
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No guitar cable alone should be in the input jack for test.


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 6:47 am
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StMrKirk wrote:
[
No noise at all when reverb knob at 0 even if guitar plunged in or not doesn’t matter


Reverb cable and /or input/ output jack bad ground ; clean them.
Is there rca jack ?

Post pictures


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 7:01 am
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stratele52 wrote:
StMrKirk wrote:
[
No noise at all when reverb knob at 0 even if guitar plunged in or not doesn’t matter


Reverb cable and /or input/ output jack bad ground ; clean them.
Is there rca jack ?

Post pictures



Do you mean reverb cable inside amp ? I plug off everything ,I show it on youtube (top of thread)


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 7:26 am
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StMrKirk wrote:
stratele52 wrote:
StMrKirk wrote:
[
No noise at all when reverb knob at 0 even if guitar plunged in or not doesn’t matter


Reverb cable and /or input/ output jack bad ground ; clean them.
Is there rca jack ?

Post pictures



Do you mean reverb cable inside amp ? I plug off everything ,I show it on youtube (top of thread)


You tube link do not show what you plug off.

I mean every reverb cable end with connector . Did your amp use connectors ?

Post picture to more help of you reverb cable and reverb tank input/ output


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 8:07 am
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From what I can find, no reverb tank, digital reverb. Apparently not an easy amp to work on either.

If you bought it new, and it's less than 2 years old, it's under limited warranty.

I couldn't find a schematic, but I did find this:

http://music-electronics-forum.com/t44184/

Sorry, but it doesn't look like it is an "easy" fix.


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 10:11 am
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stratele52 wrote:
StMrKirk wrote:
stratele52 wrote:
StMrKirk wrote:
[
No noise at all when reverb knob at 0 even if guitar plunged in or not doesn’t matter


Reverb cable and /or input/ output jack bad ground ; clean them.
Is there rca jack ?

Post pictures





Do you mean reverb cable inside amp ? I plug off everything ,I show it on youtube (top of thread)


You tube link do not show what you plug off.

I mean every reverb cable end with connector . Did your amp use connectors ?

Post picture to more help of you reverb cable and reverb tank input/ output


Sorry I worry I am not able to teardown it.. it has solid section with a lot of screws. I am afraid of damaging anything


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 10:15 am
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vinyl wrote:
From what I can find, no reverb tank, digital reverb. Apparently not an easy amp to work on either.

If you bought it new, and it's less than 2 years old, it's under limited warranty.

I couldn't find a schematic, but I did find this:

http://music-electronics-forum.com/t44184/

Sorry, but it doesn't look like it is an "easy" fix.


Sure this amp need a tech

Where is the reverb tank ? Not outside the amp, inside the cab close to the speaker ?


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 10:16 am
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vinyl wrote:
From what I can find, no reverb tank, digital reverb. Apparently not an easy amp to work on either.

If you bought it new, and it's less than 2 years old, it's under limited warranty.

I couldn't find a schematic, but I did find this:

http://music-electronics-forum.com/t44184/

Sorry, but it doesn't look like it is an "easy" fix.


Well there is a problem to send 27kg amp via post. I think I don’t have any warranty centers of fender in my country. And there is a problem that I bought it in Germany.

I think I should take it to local guys who fix valve amps. That’s my best option. If it’s digital reverb I don’t think that swap EL84s will fix it...


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Post subject: Re: Bassbreaker 15 reverb constant noise
Posted: Mon May 14, 2018 10:19 am
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stratele52 wrote:
vinyl wrote:
From what I can find, no reverb tank, digital reverb. Apparently not an easy amp to work on either.

If you bought it new, and it's less than 2 years old, it's under limited warranty.

I couldn't find a schematic, but I did find this:

http://music-electronics-forum.com/t44184/

Sorry, but it doesn't look like it is an "easy" fix.


Sure this amp need a tech

Where is the reverb tank ? Not outside the amp, inside the cab close to the speaker ?


Sorry I really can’t take of pictutre of it , amp is solid . I found video with tear down of bb15 . 3min https://youtu.be/snWPT-o_Zyk


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