Reliable source for 6C33C tubes?

rockadanny · « **on:** 9 Feb 2010, 01:18 pm »

For my Audio Mirror 45 watt SET monoblocks. Asked Vlad but his stock is low right now and not expected to increase for a couple of months - way too long for me.

macrojack · « **Reply #1 on:** 9 Feb 2010, 01:43 pm »

Ask Ralph at Atmasphere. He uses a lot of them.

FullRangeMan · « **Reply #2 on:** 9 Feb 2010, 05:52 pm »

Quote from: rockadanny on 9 Feb 2010, 01:18 pm

For my Audio Mirror 45 watt SET monoblocks. Asked Vlad but his stock is low right now and not expected to increase for a couple of months - way too long for me.

Looks Mr.Kevin in Upscale audio is a reliable source, but each 6C33 cost 40USD, at TubeDepot the price is 70 dollars(gulp!).

I already buy direct from Russia in http://www.gstube.com/ Mr. Anton made a great service and each Ulyanovsk 6C33C-B cost only $9.60 each, but a AC member think the tubes are not tested etc... (I do not know for sure).
Payment is by MoneyBookers or WesternUnion, you should ask if they accepth PayPal(a more easy way to pay).
Good Luck, Gustavo

BobRex · « **Reply #3 on:** 9 Feb 2010, 06:26 pm »

Quote from: macrojack on 9 Feb 2010, 01:43 pm

Ask Ralph at Atmasphere. He uses a lot of them.

No he doesn't. He uses a ton of 6AS7Gs, but he's not a fan of the 6C33C - he feels it doesn't hold bias well.

mshan · « **Reply #4 on:** 9 Feb 2010, 06:34 pm »

http://www.joule-electra.com?

zybar · « **Reply #5 on:** 9 Feb 2010, 07:03 pm »

Quote from: macrojack on 9 Feb 2010, 01:43 pm

Ask Ralph at Atmasphere. He uses a lot of them.

Ummm...I think you have the wrong tube.

Atma-Sphere amps use the 6AS7G tube, not the 6C33C.

Both great tubes (I happen to own Atma-Sphere and Audio Mirror amps).

George

rockadanny · « **Reply #6 on:** 9 Feb 2010, 08:06 pm »

Thank you for the replies thus far.
Ralph at Atmasphere no longer uses these tubes - hasn't for a while.
He suggested I try New Sensor (NY), which I did. No reply yet.
Upscale is currently out of stock on these, so says their web site. No reply from them yet.
Joule uses 6C33CBs. Anyone know if Bs or Cs are OK to use in my Audio Mirror amps? Are they all the same?
This (no music) sucks. One thing is for sure, I'll never be without spares again.

zybar · « **Reply #7 on:** 9 Feb 2010, 08:23 pm »

Quote from: rockadanny on 9 Feb 2010, 08:06 pm

Thank you for the replies thus far.
Ralph at Atmasphere no longer uses these tubes - hasn't for a while.
He suggested I try New Sensor (NY), which I did. No reply yet.
Upscale is currently out of stock on these, so says their web site. No reply from them yet.
Joule uses 6C33CBs. Anyone know if Bs or Cs are OK to use in my Audio Mirror amps? Are they all the same?
This (no music) sucks. One thing is for sure, I'll never be without spares again.

When I had one of my tubes go I just bit the bullet and bought a pair from Kevin.

Unless you can get them from Vlad, I think you might need to buy in bulk from Russia.

George

ldandha · « **Reply #8 on:** 9 Feb 2010, 09:31 pm »

I got mine from Partsconnexion. They can match them too.

macrojack · « **Reply #9 on:** 9 Feb 2010, 09:34 pm »

My mistake. I must be badly out of touch. Did Ralph ever use the 6C33C or was that something I conjured all on my own?

My Audio Mirror amps use 6AS7 outputs.

zybar · « **Reply #10 on:** 9 Feb 2010, 09:37 pm »

Quote from: macrojack on 9 Feb 2010, 09:34 pm

My mistake. I must be badly out of touch. Did Ralph ever use the 6C33C or was that something I conjured all on my own?

My Audio Mirror amps use 6AS7 outputs.

I have owned Atma-Sphere amps since they were kits (way back in the 90's) and at that time they used 6AS7G tubes.

I forgot that the lower powered Audio Mirror amps didn't use the 6C33C tubes - good point.

George

FullRangeMan · « **Reply #11 on:** 9 Feb 2010, 09:40 pm »

Quote from: macrojack on 9 Feb 2010, 09:34 pm

My mistake. I must be badly out of touch. Did Ralph ever use the 6C33C or was that something I conjured all on my own?

My Audio Mirror amps use 6AS7 outputs.

Hi Macrojack,
You are not entirely wrong. Atma-Sphere already made some OTL amps with the 6C33, named NOVACRON amp. Looks good...

bunky · « **Reply #12 on:** 9 Feb 2010, 11:17 pm »

When i used to own my VK60 i bought 6C33-B's from a Seller on E-Bay UK named Anthony Welsh for about $15.00 a pop and they were shipped directly to me from the source in the Ukraine and the tubes were all perfect.I cant find the guy anymore its like he fell off of the face of the earth

doug s. · « **Reply #13 on:** 9 Feb 2010, 11:53 pm »

yup, i got some 6c33c's from anthony welsh; i still have him bookmarked; he has not sold anything on ebay since nov '08.

if you buy bulk (four or more) on ebay from the russians/ukrainians, it will cost ~$20/tube, shipped. seems a bit more than what i paid a coupla years back; then it was ~$15/tube shipped. but, still cheap, compared to most power tubes. for the a-m amps, i'd recommend buying a min of eight tubes for spares...

doug s.

rockadanny · « **Reply #14 on:** 10 Feb 2010, 12:18 pm »

idandha - Thank you for the partsconnexion suggestion. They have them and tested. Expensive, but at least they're tested and immediately available.

fullrangeman - Thank you for the link - excellent price. Too long for delivery for my immediate need of just one tube. However, I may order from there for future spares, although if these are not tested I'd hate to use my amp as a tube tester. I wonder if the local guitar shop would be able to test this these tubes? Do they require a special tester?

dougs - Eight tubes?

Actually, probably a good idea. I may do this as I do not have any plans on switching these amps out. I really like their sound. Thanks.

FullRangeMan · « **Reply #15 on:** 10 Feb 2010, 02:14 pm »

Hello Rockadanny,
I wonder know if these 6C33C-B from WWW.GSTUBES.COM site are tested, this is a good question to ask Mr.Anton, he is very kindly.
IF you can made us this favor and inform us the response from Mr.Anton I thankyou a lot.
I receive my order here in Brazil(two 6C33C-B) in 2 weeks(fast to the brazilian postal mail standard).
Regards, Gustavo
P.S.> To test 6C33C-B tubes is need a tube tester with a septar socket and knowledge to read the measurement,
something is beyond of me, so I ask to a friend repair tech.

doug s. · « **Reply #16 on:** 10 Feb 2010, 03:23 pm »

as the tubes bought in bulk from eastern europe are cheap, why not have two full back-up sets? these tubes are known for not being the most reliable, especially if not tested & burned in properly, which requires a special set up.

if you have no spares presently, then bite the bullet and buy one or two for $40 or so from a place that tests them, like the tube store, partsconnexion, or upscale audio...

when putting a new 6c33c tube in your amp, i'd recommend checking the bias every day for a week, twice a week for a month, then every month...

doug s.

rockadanny · « **Reply #17 on:** 10 Feb 2010, 05:11 pm »

dougs - great info - thanks!

doug s. · « **Reply #18 on:** 10 Feb 2010, 05:23 pm »

for anyone interested in 6c33c-based amps, this looks like a sweet deal - asking $1195:

http://www.audiogon.com/cgi-bin/cls.pl?ampstube&1271004668&/Antique-Sound-Lab-KMP60-Foxdt-

doug s.

rockadanny · « **Reply #19 on:** 10 Feb 2010, 05:44 pm »

Anyone - When I get my new tube ... To watch the bias for the first few hours can I leave all of my system off with just the one monoblock powered up? Just to make sure it does nothing crazy? And how many hours would you suggest I do this for (if any):

A) Tested tube (like from Partsconnexion); and
B) Untested tube (like direct from Russia).