dirtbikedba

Hi Rameish, Thanks for the concern for my health and safety. Sorry for the confusion. This is why I thought the X-CAN V3 had ECC82's. Here is an excerpt from the write up on the web site where I purchased the amp: This indicated significant circuit changes and ECC82/12AU7 tubes.If this circuit is significantly different from the X-XCAN V2, the tuning lore for the V2 wouldn't apply to the V3. I wouldn't plan on modifying a circuit based on 6DJ8's to 12AU7's. It would take too much modification. What I would be interested in is changing out all the caps and if there were any electrolytic caps in the signal path, replacing them with poly caps, Multicaps if they would fit in the box (think D battery size for .47 uf 200V). Headphone update... The AKG-K1000 with highly modified Assemblage 300B SET (WE 300B, 1950's Mullard 6SN7GTY and custom transformers) still takes first place. It just keeps my wife up at night because it is too loud. There are no cups on these cans so they are as loud in the next room as they are on your head! They still have the best imaging as they mimic a live show by allowing the left ear to hear some of the content from the right ear speaker and vica verca with a slight delay from the trip behind the head. They get a little heavy after a while though. The HD650's are breaking in nicely. Some how they manage to give a very good sense of depth. Wow, very nice imaging. A litle flat after the AKG-K1000. Tube roll on X-CAN V3 will probably help that... Better bass though. That ear cup comes in handy. These things are very comfortable. Excellent dampening. MG HEAD with Grado RS-1 in OTL mode. Multicaps in signal path, Mullard CV2975(EL84) and Siemens E82CC. Excellent bass. Great vocals and snare. Sort of 2 dimensional after the K-1000 and HD-650. Very nice though. With current configuration, the frequency response is fuller than the HD-650's and a stock X-CAN. WIll begin tube rolling this weekend.

X-CAN V3 has arrived! Man, that was quick. I gotta hand it to the guys at http://www.amusicdirect.com, I ordered it Sunday and it is already here with HD-650's and a Cardas cable. First impressions, prettyf cool. HD-600's are nice and relaxed and airy without being sibilant. Bass is coming out even as I type. I'm sure the x-can will need some help. I'll open it up this weekend and see what is in there the box. In the good old days, they used to put the circuit diagram in the box. This thing is big enough to have a full schematic. It doesn't seem heavy enough for output transformers. OTL? That means lots of capacitor replacement opportunities. Well, the 650's keep warming up. Lots of finesse here. Excellent dampening. Next song, I'll stick the RS-1's on the x-can and the 650's on the customatic Antique Sound Labs MG Head (Mullard CV2975's and Siemens E822CC and all signal path capacitors replaced with Multicaps. Acksssssssssss X-CAN issssss ssssooooo sssssibilent on Grado RS-1, 650's sound like they are being played through a pillow on the MG head. Switching back. WIll check again in a day or two after everything is broken in.

I'll be using Grado RS-1's and Sennheiser HD650's with Cardas cable. Amsmusicdirect has a nice bundled package with the HD650, 15' Cardas cable and X-Can V3. Should sound pretty sweet after the tube roll. I will be doing a cap roll for sure too. Does anyone have a schematic for the v3? If there are any caps in the signal path that aren't dc biased, I will be replacing them with multicaps. I hate it when they put a noisy electrolytic in the signal path without any difference of potential between the cathode and anode to get the dielectric to do something besides lie there and quiver...

Thanks Bar. That article indicates that the x-can v3 still uses the 6922 type tubes. I'm still a bit confused as to the actual tube compliment on the X-Can V3. I purchased the amp from: http://www.amusicdirect.com/products/detai...sku=AMUFIXCANV3 Which had this to say about it... The usual market hype about how this amp will reveal hidden tracks on all your music and make your teeth whiter too but this definitely lead me to believe that it had 12AU7/ECC82/ECC802S tubes in it. If it does in fact have the plain old 6DJ8/6922/7308 RF amp tubes in it, I'm going to be a bit grumpy about it. I've gone to 12AU7's on my Antique Sound Lab MG-Head amps, that with a liberal helping of multi-caps and the change is phenominal. I guess if the x-cans won't use the nifty new telefunken and bugle boys I just bought, I will have to go back into the MG-Heads and see if I can design the noisy transformer out of the circuit completely.

Maybe I'm confused but I thought that a 12AU7 was a 6 volt tube if you wire the heaters in parallel or 12 volt tube if you wired them in series. The 12 signifies that there are 12 components in the tube. Again, I ask. Does anyone actually have an X-Can V3 and has anyone actually rolled the tubes in it yet? Thanks! http://www.jj-electronic.com/tube_ecc82.htm ECC82 12AU7 R.F. DOUBLE TRIODE DIMENSIONS AND CONNECTIONS: base: NOVAL Uf = 6,3 V 12,6 V If = ca .300 mA 150 mA TYPICAL CHARACTERISTIC: Ua = 250 V Ug = -8,5 V Ia = 10,5 mA S = 2,2 mA/V Ri = 7,7 kOhm µ = 17 AS PHASE INVERTER: system I system II Ub = 250 350 V Ia = 0,7 1,0 mA Ia' = 0,68 0,93 mA Uo/Ug1 = 11 11 Uo = 15 24 VRMS dtot = 1 1 % LIMITING VALUES: Ua = 300 V Wa = 2,75 W Ik = 20 mA Ug = -50 V Rg = 1 MOhm Uk/f = 180 V Rk/f = 150 kOhm CAPACITANCES: system I system II Cg/k = 1,9 1,9 pF Ca = 1,9 1,8 pF Cg/a = 1,63 pF 1,63 pF

Hi, I actually have an X-Can V3 on order but I wanted to have some nice tubes to roll into it as soon as it came through the front door. "The v3 is outfitted with a low feedback circuit taken from their Tri-Vista SACD player with ECC82 tubes and ALPS volume control which lowers distortion and improves signal-to-noise ratios, resulting in better imaging and detail retrieval." Hmmm, I've got plenty of 6922/6dj8/ecc88/ccA/7308/6h23-eb tubes laying around but now I've got to go in search of 12AU7's. Has anybody rolled the tubes in their X-Can V3 yet? Any advice on ECC82/E82CC/E802S/12AU7 tubes?