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since no-one else is interested in your post: 1. The Quad is built like a tank and so should be very reliable as long as there are no underlying issues with LDRs etc. Otherwise expect no problems. 2. Yes. Very. (IMO) 3. Never had any issues with voltage supply or grounding. Use Furman...

Where's the best place to boost a guitar signal into a pre like a Quad or a Recto? Do you boost the Lead channel by adding more signal level from the guitar or drive a distortion effect like a SD-1 into the Clean channel? ...or a combination? Discuss. Currently i'm messing about with a...

I'm up in North Yorkshire... How often do you gig up this way? It's either that, or post the Quad.

oh well, it was definitely worth a try.... Looks like you'll be dropping it off with me, then!

Wolfman... For now, i would just concentrate on replacing the plate resistors associated with Channel-1 / 2 and Lead-1/ 2. Check the values of the other resistors [in the reverb and EQ sections] compared with the schematic and see if they're anywhere near the given values. Just replace anything...

learn this drawing! you can clearly see the plate resistors and values. http://tubefreak.com/s-main.gif just put you ohm meter on the ht side of the big blue cap [after discharging it] and measure the resistance on pin 1 or 6 of the tube socket [depending on which stage you're looking at]. If...

Wolf... I think Crane has said everything you need to know about the LDRs. I didn't change all 20-odd of them, just the 10 or so associated with channel switching and isolation. If you're having probs with the EQs too then changing those LDRs would definitely be worth a go. Like I said in the...

Hey Wolfy... Yep, I've been there alright. Had similar probs with my Quad when I imported one but basically, all my issues only cleared up when I changed ALL the LDRs associated with channel switching. These LDRs can do strange things including cause noise and you might have an issue with...

you could use one isolated relay switch from the GM and the other switch from the relays on your FCB... Just a thought. Dave

What are using to switch channels? I had HUGE problems with my Formula when I tried to use it with the switching jacks at the back. I later found that all the jacks need to be switched from isolated switches or relays. If any of the jack 'grounds' are common'd up, you'll get all sorts of strange...

Yes it can! I'm sure there's a thread on here somewhere... The quad's mains input transformer has a split primary that can be rewired to work 110 or 220Vac. Rewiring is just a matter of disconnecting all the primary input wires and finding out what is what using a resistance meter. But don't...

Is the Rhythm-1 LED lighted all the time? If the R1 LED is lit then it's probably not an LDR problem. Use a mutimeter on diode check or resistance to see if the rear 1/4" R1 select jack centre pin is permenantly shorted to ground. I'm wondering if the previous owner had modded this Quad so it...

I love your carpet! Was running my Quad into a Peavey Classic 50/50 via a GM-2. Still not 100% happy so have reverted to a JMP-9001 (ever heard of it?) for the time being.

It's my guess you've got an LDR issue, man. I doubt it could be tubes as it would affect Lead-1 channel also. Look at the signal path: http://www.tubefreak.com/s-main.gif If it's only affecting Rhythm-1 channel then looks to me like LDR-2 (or 3). It could also be the Lead-1 isolation: LDR-10...

Some of you guys may be interested:--- I've recently seen quite a few topics about Mesa channel switching problems so thought I would resurrect this thread. Following on mainly from this topic: I've developed my low cost Quad switcher idea into a new road-worthy unit. It's still using the idea...

Does anyone know if there's a small and cheap device out there that will bypass an effect pedal and can be controlled remotely (ie. from a g-major relay switch) so I can switch it on and off from my midi board? I only need to use one pedal (an overdrive in my signal chain to give my guitar input...

Just got a G-major 2 installed in my rack this week... Early signs are looking pretty good so far! If there's anything specific you want me to try out on it then let me know.

I remember that the pots on my V-twin were a real weak spot- I ended up taking nearly every pot out and squeezing them back together to tighten them up. Stops any cracks and buzzing so it's worth doing. Especially the pots on the rear.

Sweet! You can clearly see the split primary windings on the transformer and how to wire it up. It's also nice to see a proper HV supply-- 17:275 transformer! Haven't seen many of those before!

My Quad only starts to sound really sweet after its been switched on for about an hour. Before then it always sounds a bit rough but after about 60 mins it really starts to sing. How much warm-up do you guys normally use with your pre / poweramp before they hit the sweet spot? Are some tubes...