#1
I am looking to get new power tubes in my VTM-60. The one's in there were some cheap 6l6GC, I can't read much else on them but they look like some of the cheaper ones I've seen online and when I the guy I got the amp from a while ago said they were nothing special.
I'm still new to tubes but I was thinking about getting this:
http://www.tubedepot.com/jj-6l6gc.html

Anybody have experience with these? Suggestions? Is the "Burn in option" a good idea?

Also, since the old ones are GC's could I get by without biasing or is that a big no-no?


Anything helps
#2
There haven't been any 6L6's that aren't GC's made for decades. The JJ's are fine if you can't find/afford good NOS ones.
The VTM doesn't have an adjustable bias but many people mod a bias pot into it. You'll have to look and see if there's a pot/trimpot inside that has been added by a previous owner. If its in stock trim then you just plug in your output tubes and play. The bias mod is popular because the VTM is biased really cold, biasing them properly coaxes a real JCM800-like sound out of them.
Burn in is a bit of a gimick, do it yourself by playing at moderate volumes for the first few days.
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#3
Thanks a lot Cathbard, that really helps. I'm pretty sure it's all stock, no mods. I'm guessing I would be able to see a soldering job that looks different from the rest if there was any kind of bias mod? There's nothing extra on the back or front of the amp either so I'm like 99.9% sure it's all stock.

Well any suggestions for some good NOS ones then? I'm thinking a step down from the Winged "C". But I might just end up buying them anyways, it's all a matter of how much extra painting I feel like doing at work.
#4
grab a pair of the groove tubes gt-6l6-ge.

nos power tubes are ridic expensive.

well actually I guess you could grab a pair of ge's or sylvanias for a 100. that's not so bad.
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Last edited by AcousticMirror at May 27, 2011,
#5
=C= are the bomb. They've gotten crazy expensive lately though. Still much cheaper than good NOS but double the price of pretty much any other new production alternative.
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#6
i still like TungSol 6L6GC-STR and TAD 6L6GC-STR in any 6L6GC applications. that's just me, but i think they're wonderful sounding.

biasing tubes are NOT absolutely necessary. but some people value it more than others. but your amp WILL work without changing the bias.
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#7
Quote by AcousticMirror
grab a pair of the groove tubes gt-6l6-ge.

This ^^

They are actually made in the US on old GE tooling!! I haven't tried them myself but when it comes time to replace my Brimars I'll definitely be grabbing some of these. I highly recommend that you support this venture by buying them. If it is financially successful we may see a small ribirth of the US valve industry. American valves were pretty good. This can only be good for guitar.
And I am obviously not spouting some patriotism bs, if a UK company were making Mullards again using the old plant or somebody had resurrected a Phillips plant here I'd be saying the same thing.
Gilchrist custom
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#8
Quote by mmolteratx
=C= are the bomb. They've gotten crazy expensive lately though. Still much cheaper than good NOS but double the price of pretty much any other new production alternative.



This. Top notch quality tubes. Quite pretty sounding too.
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#9
Some old Mullard employees actually tried to restart the Blackburn factory under the name Tech Tube a few years ago. They failed pretty quickly though. I think the site was only up for 6 months or so. The tubes got really good reviews, though everyone thought they lacked a bit of bass and they had a microphonic problem with the first few hundred. $80 a piece just didn't fly for new production 12AX7s.
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#10
Damn, =C= are stupidly expensive here. The few I found were all asking $50 for a single 6L6!
#11
Same price here. From what I've heard, they're having production and exporting problems for some reason. Rumor was the Russian mob but that seemed pretty far fetched. Dunno why they'd get involved with the tube business. Unless they pay their lawyers in Robben Ford related items.
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#12
Quote by littlephil
Damn, =C= are stupidly expensive here. The few I found were all asking $50 for a single 6L6!


I paid $80 for a pair. They were matched by .1mA. Oh it was a glorious day.
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#13
Quote by shaggydogJV
I paid $80 for a pair. They were matched by .1mA. Oh it was a glorious day.


you were bamboozled. you could easily match them however you want with a bias pot for each tube.

at any rate. at some point in the past groove tubes made tubes in the US.

their kt66s were regarded as on par with nos examples and their el84s actually sounded like el84s.

if they are doing tubes again buy their tubes.
Jumping on dat gear sig train.
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#14
Quote by AcousticMirror
you were bamboozled. you could easily match them however you want with a bias pot for each tube.

at any rate. at some point in the past groove tubes made tubes in the US.

their kt66s were regarded as on par with nos examples and their el84s actually sounded like el84s.

if they are doing tubes again buy their tubes.


Sovtek Mig 50, only a single bias knob. So I feel that .1mA is a great match. Better than most pairs I've seen come from amps.
Schecter Hellraiser C7 FR/Bareknuckle Cold Sweat/Liquifire
Godin A12 - For Sale
1991 EBMM Silhouette
Emperor 2x12

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Like going fast?
#15
Quote by mmolteratx
Some old Mullard employees actually tried to restart the Blackburn factory under the name Tech Tube a few years ago. They failed pretty quickly though. I think the site was only up for 6 months or so. The tubes got really good reviews, though everyone thought they lacked a bit of bass and they had a microphonic problem with the first few hundred. $80 a piece just didn't fly for new production 12AX7s.

Sounds like a classic case under-backing. Trying to recoup startup costs by inflating the price of you products instead of absorbing the blow with high startup capital and looking towards the long term. It's a shame, I end up scouring the world for old Mullards - of which I can usually get for about $20. $80, no wonder they failed.

I think I paid $40 or something stupid for a good pair of Brimars. They were rebadged and I don't think anybody knew what they were looking at. However, that sort of "right place, right time" stuff aside, I'd find it very hard to justify $50 for a =C= when you can get things like Sylvanias for $70.

A bit of research leads me to believe that GT are telling porkies. The GE suffixed ones aren't made in the US at all. He started screen printing "Made in the USA" on them but stopped when he was called on it. Made in China. Doubting very much that any old GE tooling is actually used.
Knew it had to be too good to be true.
Gilchrist custom
Yamaha SBG500
Telecasters
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100


Cathbard Amplification
My band
#16
Quote by Cathbard
Sounds like a classic case under-backing. Trying to recoup startup costs by inflating the price of you products instead of absorbing the blow with high startup capital and looking towards the long term. It's a shame, I end up scouring the world for old Mullards - of which I can usually get for about $20. $80, no wonder they failed.

I think I paid $40 or something stupid for a good pair of Brimars. They were rebadged and I don't think anybody knew what they were looking at. However, that sort of "right place, right time" stuff aside, I'd find it very hard to justify $50 for a =C= when you can get things like Sylvanias for $70.

A bit of research leads me to believe that GT are telling porkies. The GE suffixed ones aren't made in the US at all. He started screen printing "Made in the USA" on them but stopped when he was called on it. Made in China. Doubting very much that any old GE tooling is actually used.
Knew it had to be too good to be true.


ya it seems the new 6l6ge's are made overseas.

the ones from before 2003 are actually usa made.

speaking of which i need to track down a truck load of their kt66hp tubes.
Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

Blackstar ID:Core Beam