tgourlie
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Posts posted by tgourlie
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After doing some searches here on the site, I have found numerous posts about ALK's, AK-2's, AK-3's. The only problem I am having is finding out what comes stock depending on what year they are.
Also With different crossover designs, are they also accounting for different drivers.
Thanks for any clarification you could give to me.
TG
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makes sense thanks
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I guess I always wondered what HBR stood for? I see that a lot in the forums.
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Anyone have or heard a pair of these yet? I am thinking of getting 3 of them, and moving my Heresy II's to rears. Just wish they came in OO. I guess the other option is to buy 3 used Heresy II's.
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The noise is not that loud. I cannot hear it at the listening
position, unless I really listen for it. If I have my ear at the
horn I can hear it clearly. The same as the mac equipment.
The speakers I had the mac hooked up to we 88db sensitivity, I
thought the noise would have been the same volume if I hooked up my
speakers to the Mac.
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I have a monster power "HTS2000MKII Special" line conditioner. All components are plugged into it. The other "place" I hooked up the Mac tube stuff, was at a store. 3 Deticated Furman commercial line conditioners for the room. Lighting, Audio, and Video.
TG
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I'm pretty basic. A Dual 1229Q table on ViaBlue spickes, stock
arm, Grado Blue cart, audioquest sobogel record mat. Into a
Counter Point SA3.1 phono stage with a matched pair of Electro Harmonix
6922 tubes.
As we speak I am listening to some Paul Simon "Gracelnad". I
enjoy a lot of different stuff. From Coheed And Cambria to Jimmy
Buffett to Edgar Meyer. Most recent purchases have included:
Eagles Live, Kim Carnes, Dire Straights, Jack Johnson, and Fall Out Boy.
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This disc is GREAT!!
Track #1 "1b" is recorded really well. That cello would
sound mean on a k-horn! It was recorded using Sony's DSD.
Worth checking out for you 2ch fans.
TG
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When I hooked up the Mac equipment, I was not at my house. I just
wanted to see if other amps, in other places, made a noise that was
similar to mine.
Thanks for all the help on this forum. Turns out I was being
really picky. [:|] I figure changing the output tubes would
affect this noise as well. Right now I have the GE6550A's.
As long as they still musically sound they way they do, I will hang on
to them.
TG
P.S. check out yo-yo ma, Edgar Meyer, Mark O'Connor: Appalachian Journey. (new post in "music/DVD)
1b sounds great.
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So I think I can close the book on this. Today I hooked up the New Mac C2200 with the Mac MC2102, with a Mac MCD201. .............. .. . . . . . . . . . . . . . . . I GET THE SAME NOISE!!!!! (and that was with Canton speakers, not close to the sensitivity as mine)
Does everyone's amp have this noise floor? It sounds like even with $14,800 worth of Mac equipment, it still buzzes.
Couldn't you tap into the output of that noise, take it down to line level, phase shift it out of phase and run that into the input. Then you would technically get a silent output.
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tried with cell phone off, no dice. When I biased the tubes
(actually done by a technician I know very well) DC balance was used in
conjunction with the bias adjustment in order to get the reading within
the range specified on the amp chassis.
I have not biased it with an IM yet. I am setting that up with him as well. Mostly around his schedule.
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I know what you mean! I tried it all now, and nothing
changed. Dimmer out of all. Pure AV PF60 power filter,
Moved the amp to a different location same outlet. moved the amp to a
different outlet. Checked potential from 3rd ground to
chassis. Unplugged pretty much every device in the home.
Had the amp on an osculloscope with no sign of any noise.
Could this be normal noise coming from a tube amp at idle? Is dead silence too much to ask for out of a tube amp?
Right now I am ready to throw it out of the window, at least then it will be silent.
I have noticed that valve #1 on the preamp stage of the amp does not
glow at all. No matter which tube I put into that socket.
Hear is a simplified schematic of the amp.
http://arcdb.ws/D76/ARC_D76_schematic2.JPG
I sure do appreciate
any help on this. I would be willing to try anything you suggest.
Thanks
TG
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When we hooked it to the oscilloscope we did not get any sign of a hum from the output.
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eww that would really get me. But I would be happy none the less. As long as I can fix it I will be happy in 2channel land. [ip]
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yes it happens when the gain on the amp is at zero.... or eleven...
my goes 1 louder and I do have a lamp on a dimmer switch.
TG
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amp does not have a 3 prong plug, just two. The buzz is pretty much the same at both speakers as far as pitch and loudness. I have tried different outlets, only one piece of gear in the system is three prong grounded (preamp).
So for test #2, I just short the inputs on the amp? + to -?
I have unplugged the inputs to the amp, and the sound does not change pitch or loudness.
Thanks for the time guys, this is really frustrating.
TG
Just to keep you guys/gals posted,
-I will be checking potential from 3rd ground on wall outlet, to chassis on amp.
-Also will be adding a better power line filter (Pure AV PF60).
-I will also be checking to see if pitch/vol changes while physically moving the amp around while operating to see if it changes.
-short the amp inputs
All of these will be checked as while I was biasing my power tubes, I had it hooked to an oscillascope at my shop, and I did not see any resemblence of this noise.
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It's a hum. Sounds kind of like a buzz in the high frequency
drivers. This is really driving me nuts. I thought I was
getting a filament to cathode hum, so I bought the Electro Harmonix
12AX7 that are designed to eliminate that type of hum. But it is
still there haunting me.
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I agree with the dueling chainsaws. I play that track quite a
bit, just for giggles. Recorded pretty good too! Like you
said you can almost smell it. at times you can hear the link in
the chains.
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I was "luckY" enough to get 5 12AX7's when I only need 4. I
started moving them around, the hiss came out of different speakers, I
finally narrowed it down and got rid of it.
But the noise that made me buy new tube still remains... a buzzing type
sound coming from all drivers. It actually got louder
[:@] Would the AC
balance have any affect on the sound? I just bias my power tubes
the other day.
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I just re-tubed my amp. Audio research D-76A. I now have
this loud hiss coming from my speakers. EH tubes all
around. Whats up? HELP!!!
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Ok, so just as I think it have all of the noise out of my two channel system...
I put my ear close to the tweeter on my Heresy II's and I have what
sounds like a whine. This whine changes loudness and pitch when
the "gain" on my tube amp changes. But it is wierd, It gets
louder when I turn the gain down and nearly goes away when the amp is
turned all the way up. It also seems to be at a high frequency
when the gain is all the way up on the amp. Gain on the
tube preamp does not affect this noise.
Any ideas
Thanks
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In an attempt to eliminate as much noise as possible from my 2 channel setup, I am tracking down the source of each noise I hear.
With the volume almost all the way up, I get a lot more hiss on Phono than I do on Line inputs. I have tried numerous phono preamps Tube and SS, and numerous amps with the same noise present. That points to the TT. A dual 1229Q
Ground point seems ok, but I did notice that if I touch the + leads (outter jacket) from the tone arm to RCA female connection, the noise does get louder. Taking the Headshell off completely I get a very loud hum.
Any thoughts on how to eliminate it...? Or is that just the nature of the beast?
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Loooking into the samsung models. They are a great price. A
very stable player. Unlike Sony's 975. DO NOT GET IT!
unless you enjoy having to manually unlock the tray after the unit
decides on it's own to lockup. Lot of glitches with the 975 from
sony. Yamaha has a new piece as well that you should look
at. LG has a few as well that I would also stay away from as they
are glitchy also.
Denon's are great. The 5910 in unreal!!! but a little out
of price range. That whole line is great. Burr Brown for
audio, faroudja for video. Not bad not bad. I myslef would
go with the Denon, but figured I'd through a few other out there.
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The noise does not occur in any of the other inputs. Only the
phono. The phono stage uses two 6DJ8's (one for each channel) and
the line level inputs use 1 6DJ8. All of the tubes are also make
noise when tapped lightly. Is that normal for these tube types?
I will also check all solder joints on the inputs. I did clean
all inputs with Ultraconnet as well. Maybe I did corrupt the
solder joints.
Thanks for the help!!
makes sense 
Well I finally pulled the trigger on a pair of KHORNS!!!!!!!!!!!!!
in 2-Channel Home Audio
Posted
A pair of 89 Khorns, AK-2, Oak Oil.
I need a drink!!!!! [
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