marshall jcm 600 - tubes.

[girlafraid]

Hello all,
Can anyone reccomend me some ecc83s (4) and a pair EL34s which will give me a decent amount of clean headroom in my marshall jcm 600. I know, sacrilege and all for a Marshall, but hey, it was cheap... I've been reccomened Svetlanas so far, whats the word on these?
Im not after a 'typical' rock sort of sound, all I need from the amp is for it to be clean at highish volumes.
Im on a bit of a budget too...
Thanks very much!

[wixedmords]

Re: marshall jcm 600 - tubes.

GA, If I were to retube my JTM622 for the best cleans with max headroom I would go with SED EL34's and EH 12AX7s in all slots. The SED's are very musical, and the EH's are pretty bright. If straight EH's leave you wanting something a bit different, stick a Shuguang 12AX7C, sometimes called a Chinese C9 in either the 1st or 2nd position.

You will need to bias that amp if you replace the power tubes.

Get more opinions and good luck.

[girlafraid]

Re: marshall jcm 600 - tubes.

thanks for the reply, one problem; Im in the uk and cant find these around anywhere, asside from the EHs. Anyone else got any ideas...

[girlafraid]

Re: marshall jcm 600 - tubes.

oh, and is it reealy necesary to bias if I replace the power amp valves with the same model?
Could I stick them in for now, to at least rectify the situation, and then get them biased at a later date?
thanks.

[wixedmords]

Re: marshall jcm 600 - tubes.

oh, and is it reealy necesary to bias if I replace the power amp valves with the same model?
Could I stick them in for now, to at least rectify the situation, and then get them biased at a later date?
thanks.

Any power tube change needs biasing. I even check my EL84 amps, because it is easy and I make sure they are operating in a safe range. But, I maintain my amps. Some don't. It is too bad, because biasing is easy. To each his/her own.

On my 622, a 1/4 turn off on the bias pot can put the amp at an extremely hot bias, so everyone be careful. Think of it like a truss rod adjustment, a little at a time.

[Inferno]

Re: marshall jcm 600 - tubes.

It's nice to see a fellow JCM 600 player. If you havn't checked out Eurotubes (http://www.eurotubes.com/index.htm) yet you should. Shoot Bob an email and he'll recommend you a set of tubes. I went the high(ish) gain rout when I ordered my tubes, so I'm of no real help...

[shredaholic]

Re: marshall jcm 600 - tubes.

if you're in the UK, there's www.watfordvalves.com

[tone?]

Re: marshall jcm 600 - tubes.

i used to have a JTM60 which i belive is the same amp.

mine sounded the best when i put in 6L6's belive it or not

[girlafraid]

Re: marshall jcm 600 - tubes.

thanks very much for all the information, advice etc. For what its worth Im thinking of going for JJ el34s and ecc83s's and a nos phillips ecc82 for the reverb. Should be able to get a good bit of headroom, but if I ever feel like getting dirty or selling it on it'll still be 'marshall' enough...
Thanks for the infor regarding biasing too, I had a feeling it was a bit of a stupid question... mine is actually the 602, the 2x12" combo version too. Great amp, served me well so far. Just wish it wasn't so heavy!