V4B users

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V4B users

Postby randall » Thu Mar 28, 2013 12:09 pm

Talk to me about a V4B ver 2 that I have in for repairs. Complaint was low, distorted output. First thing I did was replace all the original electrolytic and coupling/bias caps. Then I found two open grid resistors, replaced all four of them. Aside from a Sovtek 7027A that has internal sparking, and must be replaced, this amp seems very growly to me. I know that is what these big Ampegs are about, but as I play it on about half vol through my 300w 210 cab, it just sounds like it is overpowering my cab with big, growling notes, almost making me wonder if I need to look at my cab for issues.

How growly are these expected to be? That's not my game, and I have never played through this head before, so maybe I'm just late getting to that party. I am playing a 80's SB-1w/MFD p/u with nickle rounds.
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Re: V4B users

Postby harleyyy » Thu Mar 28, 2013 6:13 pm

Mine starts to break up with grit around 10-11 o'clock with a 4 ohm cab.
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Re: V4B users

Postby MANZ » Thu Mar 28, 2013 7:55 pm

I thought having enough clean volume has always been a bit of a concern with the V4B. Basically, from my experience, if I'm playing at regular full volume performance/practice levels which are at least moderately loud, the amp is going to be already breaking up pretty noticeably. Just how much clean volume are you getting?

I would expect some fairly prominent growl playing an SB-1 with the volume knob 1/2 way @ the 12 o'clock position. Doesn't the SB-1 have some pretty aggressive pickups? That could be kind of "adding fuel to the fire".

I always had a soft spot for the V4B probably since it was the first decent amp I ever bought (& still have it too!). I hope you work it out. [smilie=grinning-smiley-003.gif]
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Re: V4B users

Postby randall » Fri Mar 29, 2013 9:20 am

Pete, is that 10 -11 on the vol scale or 10 -11 o'clock?
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Re: V4B users

Postby harleyyy » Fri Mar 29, 2013 9:24 am

randall wrote:Pete, is that 10 -11 on the vol scale or 10 -11 o'clock?


Where the volume knob and/ or the2nd hand hits 10 or 11.
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Re: V4B users

Postby randall » Fri Mar 29, 2013 3:00 pm

Yeah, well then maybe this amp is about right.
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