Well put Metalhead , and very true , as I have state before(many times) tube or solid state is a matter a taste.

                                             Rock On

sounds like a mechanical problem, try tightning everything up( tightning all the screws , nuts and bolts) if that doesn't would try installing some renforcment(pieces of wood at the joints and such)

                                                Rock On

I turn it on - lamp ocmes on but the 5Watt resistor across the power input heats up so much it actually glows red and you get that "burning" smell.

what is the resistor(1K ohm, 2K ohm .... etc )

                                  Rock On

I have to disagree with teemik on this one the tube amps are louder I will match any SS amp you can come up with against my 50 watt marshall any day of the week. and by the way ZZ Top only used a SS  amp on that one album and tour, to the best of my knowledge , and I live in Texas. Also the reason that MOST power amps a SS is the cost of building a 1000+ watt tube amp, the iron(transformers)alone would cost thousands of dollars. However , back to the bare bones facts , bro go with what you like , if it has the tone your looking for screw is tube or SS better , was best is what's best for you.
     

                                                   Rock On

What's Up

         I use both myself tube and SS , however , it all depends on what you like , forget what Joe Blow tells ya , if you like the tone of your amp (or any amp for that matter) then go with it. BB King's main amp is a Lab Series L5 , which entirely SS, while SRV used a Fender Deluxe which was tube. The choice is up to you. The tube amp is a louder amp and has more warmth(most , not all amps are created equally) , what I mean is a 50 watt marshall is as loud or louder than some 100 watt SS amps. This is because the volume of an amp is not determined by the wattage  , there are several factors involved. I will start from the speaker and work backwards, the speakers in a tube amp are connected to a transformer in a tube amp ( this is to isolate the high dc voltage) it is not in a SS amp, this is one of the main factors. the second is (and this brings use back to the high voltage) the typical tube amp uses a suppy voltage of 350 to 550 volts dc , the typical SS amp uses a voltage of around 45 volts to 100 depending on maufacturer, this gives the tube amp a larger voltage swing (even though the SS uses - and + 45 to 100 volts). However it goes on and on , the SS if it is a quality amp are great amps just as the tube amps are , it is a personal choice.

                                     Rock On

This is the 1500 watt  rack mount power amp right?

what kind of mod are you wanting to do, or what do you want to change about it?

                                     Rock On

There you have it Teemuk , has once again brought it to ya.

                               Rock On

Heat up the solder joints on the pot.

                                Rock On

I agree Nasville , but back in the day , they didn't make a combo( and amp and cab modeling wasn't invented) that had the tone of the stacks(which ever stack you like).
For the Marshall tone at a smaller volume if you like tube(like me) the they have a 18 watt mini stack, lol-as far as that goes I think everyone makes a mini stack now. I use Modeling myself, but to be honest, they are close , but no cigar. I have tried a lot of model units and none have touch the tone of a Marshall, Mesa, Hiwatt, Dumble or any other quality Tube amp. However with the Peavey Valveking you can dial in most tube tones. Finally , If the the guy at the mixing board can't handle the volume of your amp , he can't handle the mix , every MUSICIAN , can judge the size of the room and tell fairly close how loud he or she can turn up the amp.

                                              Rock On   

I will say only a few things on this subject.
1. you can directly replace a tube with a FET ( high voltage FETS( avialabe but expensive))
2. you will not get the same tone as the 6505+ , it's be tryed by may , close but no cigar.
3. MAN THAT IS ONE BIG IMAGE.

                                         Rock On

Teemuk is absolutly correct, this is a most common problem, dig in and start cleaning and looking , it mostly is that pot , I would start by throwin some heat to it right away.

                                             Rock On

Of course I do, the V4 is a great amp I had the pleasure of doing a cap job on one a few days ago , great heads . As far as tone goes , I play a Marshall 6100 on the left side and a Mesa Dual Recto on the other, now as for the sound guy , it's not a problem , all amps have this wonderful control on it called the Volume pot. I haven't played metal in years (The old hands just can't move that fast anymore).

                                               Rock On

Quote from: nashvillebill on August 16, 2008, 01:01:25 AM
If I understand your message correctly, you're in England, correct?  And you don't have a lot of money to spend.  But you want a)lots of volume, b) a great tone. and c) reliability.  Well, here in the States I would agree with the "used Peavey" answer but I doubt they're as cheap in England.

Question:  why do you need so much volume?  Most clubs--and audiences--can't really stand that much volume, not to mention the fact you'll soon be deaf!!!  (Please wear hearing protection!!)

Today's bands don't usually use insanely loud amps anymore, on some tours the big Marshall stacks are just there for looks.  They'll run a small amp, mic'd, into the PA and let the sound reinforcement system take care of the volume.  Or use a preamp then DI into the board.

However, if you're absolutely determined to pursue the massive volume route, get your cash together and just start hitting the used equipment shops.

ROFL-Really I use 2-100W stacks very weekend , here in Dallas. However , if your in England , bro , check out craigslist.net  and the like , or maybe a pawnbroker, I have never been to England so I rellay could give you much input there.

                                              Rock On

Great Link , thank Teemuk