Sound loss across all three channels

Discussion for the new Mark V

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Ckocher
Bottle Rocket
Posts: 10
Joined: Sat Feb 24, 2018 7:52 pm

Sound loss across all three channels

Post by Ckocher » Sun Jun 23, 2019 8:12 am

Hello all. Fired up the V and I have sound loss across all three channels. Barely audible. Could it be power tubes? Any and all help would be greatly appreciated. I love this amp and nailed the tone I had in my head. Thank you.

Wayno
Mark III
Posts: 338
Joined: Sun Sep 27, 2015 2:50 pm
Location: Good ole England

Re: Sound loss across all three channels

Post by Wayno » Mon Jun 24, 2019 2:58 am

Hi, I would check your tubes first. Namely power tubes, but also check on the different wattage settings too. Also preamp tubes, mainly v1. If none of those works to narrow it down it could be a Jfet issue similar to what I had and that's definitely a tech job to fix unless your a brain surgeon with a soldering iron!
Her highness the Veenus
(Mark V/V4 & V7 12AT7 Combo)

2 x 12 Vertical Cab
GSP1101

Gibson LP Studio with alnico ii pro
Schecter C1-XXX with emg 81/85 18v
Jackson Dinky XL with Duncan designed???
Sigma DNC-1STE

Ckocher
Bottle Rocket
Posts: 10
Joined: Sat Feb 24, 2018 7:52 pm

Re: Sound loss across all three channels

Post by Ckocher » Fri Jul 05, 2019 8:28 pm

I changed my tubes out. No improvement. I’m in uncharted waters now.

Ckocher
Bottle Rocket
Posts: 10
Joined: Sat Feb 24, 2018 7:52 pm

Re: Sound loss across all three channels

Post by Ckocher » Fri Jul 05, 2019 8:29 pm

I changed my tubes out. No improvement. I’m in uncharted waters now.

Wayno
Mark III
Posts: 338
Joined: Sun Sep 27, 2015 2:50 pm
Location: Good ole England

Re: Sound loss across all three channels

Post by Wayno » Tue Jul 09, 2019 3:09 pm

Tech job mate, any service centers near you?
Her highness the Veenus
(Mark V/V4 & V7 12AT7 Combo)

2 x 12 Vertical Cab
GSP1101

Gibson LP Studio with alnico ii pro
Schecter C1-XXX with emg 81/85 18v
Jackson Dinky XL with Duncan designed???
Sigma DNC-1STE

Markageddon
Mark III
Posts: 249
Joined: Thu Jul 13, 2017 7:01 pm

Re: Sound loss across all three channels

Post by Markageddon » Wed Jul 10, 2019 8:55 am

Seconded. If its not the tubes, not the fuse, then its bite-the-big-one time: Tech servicing.
Mark V
Mark V:25
Mark III (Red Stripe)

Ckocher
Bottle Rocket
Posts: 10
Joined: Sat Feb 24, 2018 7:52 pm

Re: Sound loss across all three channels

Post by Ckocher » Wed Jul 10, 2019 5:06 pm

Yep. Gonna have to go to the tech. 105 miles

Tucker44
Mark II
Posts: 110
Joined: Wed Feb 16, 2011 9:23 am
Location: East TN

Re: Sound loss across all three channels

Post by Tucker44 » Thu Jul 11, 2019 10:22 am

FYI I recently had a pre amp tube cause similar. I never could decide which tube was the culprit. I had started v4 because channel 2 sounded weak. then I ended up rolling several and thru that process had a loss across all three channels. eventually I must have changed the correct one because she sounds awesome again.. good luck.

Ckocher
Bottle Rocket
Posts: 10
Joined: Sat Feb 24, 2018 7:52 pm

Re: Sound loss across all three channels

Post by Ckocher » Sat Jul 27, 2019 11:14 am

I changed all power tubes and all preamp tubes. Brand new. No results.

Markageddon
Mark III
Posts: 249
Joined: Thu Jul 13, 2017 7:01 pm

Re: Sound loss across all three channels

Post by Markageddon » Sun Jul 28, 2019 5:31 am

Chassis removal time, then packing and addressing it, then a hopefully relatively short wait for repairs and merciful billing are in thine future for sure.
Mark V
Mark V:25
Mark III (Red Stripe)

Ckocher
Bottle Rocket
Posts: 10
Joined: Sat Feb 24, 2018 7:52 pm

Re: Sound loss across all three channels

Post by Ckocher » Wed Dec 11, 2019 5:24 pm

Hello all. I had to take the old girl to a tech. 200 miles. Diagnosed with a bad circuit. However, she is fixed and it sounds bad ass! Dude did a great job and I’m glad to be on her again.

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jb's 52
Mark IV
Posts: 512
Joined: Tue Mar 16, 2010 11:19 am
Location: west coast

Re: Sound loss across all three channels

Post by jb's 52 » Thu Dec 12, 2019 11:31 am

Ckocher wrote:
Wed Dec 11, 2019 5:24 pm
Hello all. I had to take the old girl to a tech. 200 miles. Diagnosed with a bad circuit. However, she is fixed and it sounds bad ass! Dude did a great job and I’m glad to be on her again.
200 miles!!! Good to hear you got 'er fixed!!!
Could you let us know who you went to in case others have similar issues?
Good, solid techs are hard to find!!
Enjoy!!!!
♫♫♫♫


Union Down

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Mark V Head
Roadster Head
2x12 Recto Horizontal

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