Jfriley wrote: Markageddon wrote:
orionz06 wrote:Differences? Any threads here? Search doesn't help with three characters.
Thread detailing all you need to know.
Tube swap: Bigger more grinding mids, low end, increased useable gain in channel 2, smoothening out any offensive highs even in high gain mode, with high presence even.... , enhanced smoothness and sweetness in lead notes....
All from putting a 12AX7 in the V2 tube position instead of the AX7.
In this thread you can track the evolution of this discovery. Apeman was the 1st one, using this technique on the bigger amp. I just applied it to a similar gain stage in the 25. 35s should work with the same trick.
Hi, thanks for this. I've owned the v:35 for about a year and I'm still tweeking it (it lives at my drummers house so I don't get to mess with it often).
Is this mod easy to do? I have zero skills when it comes to this stuff. Where do you even order the tube from? If it's a quick pull out one, put in the other, and I can't damage the amp, then I may give it a try.
I just bought the Mesa 12at7 at my local tube stockists. You can order them at your local guitar store if they don't carry them. They're pretty standard, used for different roles in different amps. I would assume your local Mesa dealer is for sure.
If all else fails google 'Mesa 12At7 prices' and your county/city...that should yield results.
Paid £22 each uk money for mine. I bought 2.
Its as simple as a tube swap: Making sure your amp isn't plugged in to power, that its switched off, opening your chassis by undoing the 4 big screwbolts on the top of your amp, gently sliding out and turning over the chassis,
And replacing V2 positions' 12AX7 with your newly acquired 12AT7. (Its standard action pulling out/plugging in tubes. If you're not experienced, consult the many tubeswap guide vids on YT.) Re-assemble.. et voila.
Consult the manual as to the location of the V2 socket. Its next to one one of the transformers, the PT, IIRC.
I'd say you'll be ok. I'm not Mr.Experience with the complicated stuff, and had only done 3 tube swap sessions in my 7 years of Mesaness. If I could, I'd reckon you could.
Heres a vid on the daddy amp which should illustrate the tube removal stuff. With the chassis out you'll not have to poke around to access the tubes. Dont touch anything else the other side of the chassis, the guts of the amp.
Remember 2 points: as you're sliding the chassis out, to watch for the reverb wires that connect chassis to reverb tank. unplugging one of them may give the you the room to turn the chassis over. Reconnect it when you put the chassis back in, if you do.
Also that if your AT7 is like my two, the pins on the tube, from new in box are slightly angled in uniformally towards center. just take usual care in putting it in, line up the pins with socket, the no-pin gap on the tube with the bit of the socket holes where there are no holes. When there, It feels like theres resistance, but the pins will play ball as you gently yet confidently apply pushing in force. After that they're straight when you take em in or out.
Thats about as complicated as it gets. Hope this helps.