Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

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belamored
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Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby belamored » Sat Dec 31, 2016 3:44 pm

Hello Forum,

I recently purchased a brand new Vintage 16 combo.

Everything appears to be functioning properly. However, when I turn the amp off - the amp gives off a quick buzzy/poppy/farty sound. I've turned the volume all the way down and even unplugged the guitar before shutting down, but the sound persists.

Any suggestions?

Thanks,
Belamored
Somerville, MA

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Kevin Gault
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby Kevin Gault » Sat Dec 31, 2016 5:41 pm

Hi Belamored,

Yes the V16 makes a pop sound when shutting down, I believe it is due to a capacitor discharging. It is normal with a properly working V16 so no cause for alarm. I hope you enjoy your amp!
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belamored
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby belamored » Mon Jan 02, 2017 6:01 pm

Thanks Kevin! Much appreciated.

Kevin Gault wrote:Hi Belamored,

Yes the V16 makes a pop sound when shutting down, I believe it is due to a capacitor discharging. It is normal with a properly working V16 so no cause for alarm. I hope you enjoy your amp!

kennym9898
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby kennym9898 » Tue Jan 03, 2017 2:14 am

It actually has to do with the reverb, turn down the reverb before you turn it off and it won't do it. It will have a pop sound but not the buzzing/farting sound.

belamored
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby belamored » Thu Jan 05, 2017 12:05 am

Thanks Kenny! The reverb was the culprit. I was starting to get a little bummed and thought I got a lemon. :D

kennym9898 wrote:It actually has to do with the reverb, turn down the reverb before you turn it off and it won't do it. It will have a pop sound but not the buzzing/farting sound.

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UnexplodedCow
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby UnexplodedCow » Wed Jan 18, 2017 9:17 pm

This is interesting, as I've not experienced this with the spring reverb tank versions. Maybe it has to do with powering the digital unit? In any case, good to know should I run into it.

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HallwayMinstrel
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby HallwayMinstrel » Wed Jan 18, 2017 9:34 pm

UnexplodedCow wrote:This is interesting, as I've not experienced this with the spring reverb tank versions. Maybe it has to do with powering the digital unit? In any case, good to know should I run into it.


Yup. It only happens on the new digital reverb versions.

My newer VT50 (digital reverb) does it also, if I forget to turn the amp on standby before shutting it off.

My older used VT16 combo with spring reverb does not exhibit the symptom.

It think it's because the digital reverb dies a quick digital death due to capacitor discharge, while the tubes are still passing signal because they die a slow death. It's harmless, in any case.
2011 V3M412 - GT12's
12 SH550CE - S22's
12 VT16 Head
13 Bolt V - S60A's
13 212E 2x12 - Vintage30's Ipswich, England
13 Son's Bolt Kit
16 VT50 Head
16 TLB60 - AP11's
16 1983 X60B 60-watt 6L6, spring reverb
16 Used VT16 Combo-spring reverb

G-Man
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby G-Man » Wed Mar 08, 2017 4:27 pm

I have an Old V16 Combo, and mine has really gone bonkers. Not tubes.

See Video

https://www.youtube.com/watch?v=BoYcyWsXHnA&feature=youtu.be

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HallwayMinstrel
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby HallwayMinstrel » Wed Mar 08, 2017 5:27 pm

G-Man wrote:I have an Old V16 Combo, and mine has really gone bonkers. Not tubes.

See Video

https://www.youtube.com/watch?v=BoYcyWsXHnA&feature=youtu.be


For reference, g-man is referring to this thread at the other forum: They're sending him a new combo at a discount.

Welcome to the forum! You finally made it! :lol: 8-)
2011 V3M412 - GT12's
12 SH550CE - S22's
12 VT16 Head
13 Bolt V - S60A's
13 212E 2x12 - Vintage30's Ipswich, England
13 Son's Bolt Kit
16 VT50 Head
16 TLB60 - AP11's
16 1983 X60B 60-watt 6L6, spring reverb
16 Used VT16 Combo-spring reverb

mbruffey
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Re: Vintage 16 Combo - buzzy/poppy/farty sound when shutting down

Postby mbruffey » Mon Apr 17, 2017 10:51 pm

G-Man wrote:I have an Old V16 Combo, and mine has really gone bonkers. Not tubes.

See Video

https://www.youtube.com/watch?v=BoYcyWsXHnA&feature=youtu.be


I just rebiased and put in a new set of output tubes yesterday (Vintage 16, newer model with digital reverb). Interestingly the bias, I discovered, was set only to about 27ma. I set it to 40ma. That video sounds exactly like mine did afterward--in triode mode only. Thinking it was perhaps the new tubes, I put the old ones back in. Not so bad, but had weird crackling noises. 16w mode is just fine. Changing the speaker from output 2 to output 1 jack (while off, of course) seemed to aggravate it. Hence, I cleaned the ribbon cable connectors at jack board and main board, worked the switches a bunch of times, and inserted speaker plug many times in the three jacks. The jury is still out, because the problem seems intermittent. One time its fine, the next not so good.

Awaiting response from email to Carvin.

M


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