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Calling all MG Head owners... sign up to try the Head-Fi MG Head tube rolling pack! - Page 3

post #31 of 105
3/30/02 at 10:10pm

christmas!

gee, this is just like the anticipation of christmas coming, when we were kids! Santa Dangerous!
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post #32 of 105
3/30/02 at 10:42pm
Thread Starter 
THE CENTER SOCKET... ALL ARE SUPPOSED TO GO IN THE CENTER SOCKET!!!

Don't freak me out like that!
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post #33 of 105
3/30/02 at 10:48pm


Thanks... So the two big tubes don't get rolled at all? What do they do then?
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post #34 of 105
3/30/02 at 10:55pm
Thread Starter 
Power tubes? Not sure of the exact terminology. Swapping them out doesn't make as much difference as changing the center tube. Still, it's worth doing if you have the Sovteks. I use a pair of JJ EL84's and I like what I hear.

You'll be sending the THSP to TimSchirmer on April 6. I'll PM you with his mailing address now.

Everyone else: I'll periodically update my post on page one so everyone knows where the THSP is.
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post #35 of 105
3/30/02 at 11:13pm

both

santa: i thought we were supposed to get a pair of the jjs and a pair of the yugos for this. boy old guys get confused! ( that's me.)
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post #36 of 105
3/30/02 at 11:16pm
Nick: One last question, then I'll stop bugging you. How much time to I need to wait before switching tubes, so that the other tubes cool down? I've heard bad things can happen if you mix hot and cold tubes.
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post #37 of 105
3/30/02 at 11:28pm
Thread Starter 
Bug me! Knowledge is good.

No big deal on the temperatures. Pop in a new tube, power up the MG Head, wait about a minute, and start listening. Make sure your headphones are plugged into the OTL socket before you power-on the MG Head... but I'm sure you already know about that quirk by now.

Same for vice versa. Power off the MG Head, wait about a minute, then return the tube to the case. Try to handle it by the top so you won't touch the writing on the sides. It rubs off very easily.

Sorry cyclingasronomer, no EL84's... but you should replace the Sovteks anyway!
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post #38 of 105
3/30/02 at 11:34pm
I thought it was have the headphones not plugged in when you power up, so a capacitor has time to charge or something...
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post #39 of 105
3/30/02 at 11:46pm
Thread Starter 
I keep mine plugged in to the OTL jack when I power on (and off).... otherwise I get a LOUD POP.
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post #40 of 105
3/30/02 at 11:58pm
I just tried it, and you're right, as usual. Maybe Jude should call you the "MG Head co-Expert" (the other one being Joe Lau)
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post #41 of 105
3/31/02 at 12:18am

20 minutes

nick: i thought it took about 20 minutes for the tubes to warm up to a consistent sound. that's the way it is with my stereo amp and preamp. am i missing something?
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post #42 of 105
3/31/02 at 1:37am

First impressions

Impressions are in the order I tried them, while listening to Shostakovich's Symphony no. 8, 3rd mvmt on the Delos CD "Engineer's Choice II".

The Arcturus was a bit of an improvement over the stock JJ, but not really enough to warrant buying it.

The Tung-Sol and my Apheared 42 sound somewhat alike, although the Tung's treble is smoother by a bit. I really like how the Head sounds with this tube.

The Sylvania 12AU7's treble is a bit recessed, but the bass is nice and meaty. Yet after a few minutes, it's starting to sound slightly muffled?!? Go figure.

Unlike the 12AU7, the Sylvania 5751 has nice, crisp treble and nice, deep bass. It does very well with ambience, and the midrange is deft and sounds like a steak with excellent and slightly sharp sauce. Listening to Mussorgsky's Dream of the peasant Griotzko the treble is REALLY nice and clear. This tube is good. How much do you want for it?

Okay, now that I've done about an hour and 40 mins worth of listening, I'm gonna go do some homework. But stay tuned, there's more to come, from The Wonderful World Of MGHeadDT(OTL) Tube Rolling as Made Possible by our sponsor, Nick Dangerous, and the Head-Fi Message Boards.
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post #43 of 105
3/31/02 at 2:41am
Silly newbie question but why is it called Tube Rolling? Do you actually roll the tubes around the table or what?
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post #44 of 105
3/31/02 at 2:46am
You know, I've always wondered that too. Maybe you're rolling yourself a better amp? Rolling tubes in and out of your amp? The world will never know...
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post #45 of 105
3/31/02 at 4:31am
Quote:
Originally posted by Multi
Silly newbie question but why is it called Tube Rolling? Do you actually roll the tubes around the table or what?
I have a theory about this...

I think they called it "tube rolling" because most of the older tube amps i've seen have the tubes going sideways. The person changing the tubes would have to "roll" the tube to get the right pins in the right holes.

(just a theory)
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