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Base theme by DesignModo & ported to Powered by Vanilla by Chris Ireland, modified by the "theFB" team.
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Disconnect the reverb jacks and speaker jack.
Disconnect clip holding mains wire.
Remove top back panel, power valves and rectifier valve.
Remove 3 screws holding chassis to the rear underside of the top
Remove the 4 screws at the top
Slide chassis out
First, make a note of the reverb tank connections on back of the amp.
Next, the four screws on the top back panel.
Then the four screws on top.....
Been uploading old tracks I recorded ages ago and hopefully some new noodles here.
You can still swap white/black (CP1) with black (CP8) to get 240V operation though, if you don't want to swap the violet and white/black first.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Been uploading old tracks I recorded ages ago and hopefully some new noodles here.
Tested it and works fine.
Also ... here's a question for the experts. When running the amp at 240v (instead of 230v) will there be a little more heat generation?
Basically the problem is that the amp is set for 230V but is actually receiving 240V, so all the internal voltages are increased by 4.3% above their designed values. That doesn't sound much, but it's more complicated because power is proportional to the *square* of voltage, so the dissipation in the components goes up by 8.9%, which is starting to get noticeable. It won't make the amp fail immediately or even soon, but over time it does stress some parts more than they need to be.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
The problem is that the voltage is fixed by the transformer ratios in the substations, so unless/until they're all replaced then nothing has actually changed. I assume that any new ones are made to a true 230V, so over time the problem will eventually be resolved - but I could be wrong about that. Even if I'm not, it will be a very long time - substation transformers don't often fail.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
For a job thats trivially easy it really was rather nerve-wracking, but maybe its because I'm a big wuss. Those bloody spade connections are a nightmare to get off. I know they need to be secure but I wasn't half sweating by the end :-D
Need to have a proper play tomorrow (kids are in bed now) to see if it has made any tonal difference (not expecting much). Weirdly I think the trem ticking is slightly louder but that may be imaginary.
When I did my DRRI it actually made the trem tick quieter - though that’s a different circuit.
As for the tick, the amp is pretty quiet anyway. It only gets really ticky with the reverb cranked higher than I'd ever use it. I'll need to have a proper listen tomorrow though, tonight I just turned it on and stuck my ear next to it to listen to the noise so was probably hyper sensitive.
Playing a Les Paul through the amp, and there's reduced hissing and noise. With/without reverb. Ditto tremolo. And ditto both. And then I put a few pedals in the way, and it's quieter. Nothing scientific, but an aural improvement. Caveat. My impression of the sound/tone "before mod" could have been tainted by lack of use over the previous 2/3 months.
The biggest thing (again relative) is that there appears a more distinct difference between the two inputs. I can hear the low end on Input 2 as distinct from the brighter but possibly fuller Input 1.
Wow.
Channelling the words of Arsene Wenger whenever a player returned to action after a long absence... it's "like a new amp".
PS - It's got a Celestion Neo Creamback in lieu of the stock Ten-30.