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Post by PinkFloyd on Dec 13, 2010 10:48:11 GMT
With technobabble like that to back them up, and no doubt being made of the finest unobtanium, mined by giant leprechauns in the foothills of the Himalayas, I bet they're damned expensive too.  They're rubber feet  I just plop them on top to "dampen" the cap a bit... may sound daft but I believe it helps the overall SQ. |
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jokelo
<100
The Glove Guy
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Post by jokelo on Dec 17, 2010 21:58:48 GMT
Ok, now we have an explanation for those  Don't know how much they affect the sound, as have no any comparison. About the amp: Seems to take a bit time to warm up things (maybe valves). At half an hour on(just on, not headphones connected), complete lack of left channel. After about 5 minutes of sound (ie. music on, headphones connected...) Left channel appears to be little quieter than right and a bit crackling and harsh sound on left. An hour or so on, everything is fine and sounds absolutely fantastic. Did not notice this before than today, as I plugged headphones after this half an hour warm up. Every other day it has been warming up at least 2-4 hours before connecting headphones. Will be testing it further... |
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jokelo
<100
The Glove Guy
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Post by jokelo on Dec 18, 2010 7:48:32 GMT
Mike,
Yes I love the sound of those valves. BUT...
I noticed this left channel problem AGAIN, yesterday. So, before that they worked fine and sounded absolutely fantastic.
Did test again this morning. 15 minutes warm up. Then plugged phones in, cd in -> left channel : crackling, no sound, sound, crackling, no sound, sound....
Opened up the case, swapped valves, 5 min. warm up. Sound is back again, no problems at all. Left it now on. Let's see what it sounds like after 10 hours on I'll be home from work.
So, I did send you that mail about reserving valves much before there was any problems with anything. I will surely buy another set of valves, but just trying to figure what the hell is this problem with the left channel...
Always after swapping/reseating valves the problem goes away.
Before the new valve bases, and now seems to be the same with fully modded can and new valve bases.
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jokelo
<100
The Glove Guy
Posts: 80
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Post by jokelo on Dec 18, 2010 20:39:35 GMT
It's been powered up for now 14 hours. No any problem with left channel for now after done valve reseating this morning...  Maybe it just needs to be powered up like forever  |
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Post by PinkFloyd on Dec 18, 2010 20:55:24 GMT
It's been powered up for now 14 hours. No any problem with left channel for now after done valve reseating this morning... Maybe it just needs to be powered up like forever Nope...... sounds like there is an intermittent connection somewhere.... the fact that the problem disappears when you "press down" on the board suggests a poor connection somewhere..... send her over to me and I'll go over every joint with a magnifying glass. Mike. |
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Post by PinkFloyd on Jan 8, 2011 22:23:00 GMT
08th January 2011 - Adam Smith's V-CAN Burr Brown OPA1644 JFET "soundPLUS" opamp mounted on SOIC to DIL14 "Winslow adaptics" adaptor (socketed with a turned pin DIL14 socket to enable future opamp rolling if desired)..... Gain mods. "XTRA" capacitance mods. Samwha VA series, ELNA Cerafine, Nichicon MUSE, WIMA polyprop caps. Before:  After:          |
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Post by PinkFloyd on Jan 16, 2011 20:38:15 GMT
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jokelo
<100
The Glove Guy
Posts: 80
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Post by jokelo on Jan 16, 2011 20:42:05 GMT
No sticky rubber feets?  |
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Post by PinkFloyd on Jan 16, 2011 20:44:18 GMT
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Post by PinkFloyd on Jan 16, 2011 20:45:18 GMT
No sticky rubber feets? Yes.... I will fit them tomorrow |
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Post by alistair72 on Jan 16, 2011 21:52:03 GMT
Top stuff!
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Post by PinkFloyd on Jan 16, 2011 22:00:42 GMT
Alistair, I've got a few amps here at the moment and only managed to put one hour on your V-CAN (sounds fantastic by the way) so, when you receive it back this week, give it an initial 3 or four hours (of music playing) before listening "critically".... it will improve further over the next 200 - 500 hours. Hope you like it! Mike. |
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Post by alistair72 on Jan 16, 2011 23:23:35 GMT
No problems Mike. I am still getting my ears back after an ear infection so critical isn't on the cards for a few weeks.
Really looking forwards to it.
Cheers,
Alistair
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Post by alistair72 on Jan 20, 2011 18:39:28 GMT
Well I'm plumbed in and liking it even without the 3-4 hours. There is still a right first bias as you turn the volume up form zero, but there is more control so its very liveable with compared to the stock hair trigger volume control. The most noticeable thing so far is bass. Definitely more and tighter. Will report back as things improve. Cheers Mike |
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Post by PinkFloyd on Jan 20, 2011 20:55:18 GMT
Well I'm plumbed in and liking it even without the 3-4 hours. There is still a right first bias as you turn the volume up form zero, but there is more control so its very liveable with compared to the stock hair trigger volume control. The most noticeable thing so far is bass. Definitely more and tighter. Will report back as things improve. Cheers Mike Hi Alistair, You will always get that "unevenness" right at the start of the pot.... most of us don't listen that low so it shouldn't be a problem Give the amp a good few hours to bed in, thins will start to fill out nicely Mike. |
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Post by PinkFloyd on Feb 14, 2011 22:05:31 GMT
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Post by hellediemagnussen on Feb 15, 2011 0:15:57 GMT
Looking great Mike Can't wait to hear it... |
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Post by mrpharmacist on Feb 15, 2011 18:58:23 GMT
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Post by PinkFloyd on Feb 15, 2011 21:01:38 GMT
Quite funny.... the two large green caps (1000uF Nichicon MUSE) have been positioned in the two front slots..... The front panel PCB will foul them in this position You would have thought they would have taken the photo "after" finding this out |
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Deleted
Deleted Member
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Post by Deleted on Feb 15, 2011 21:08:32 GMT
Actually Mike, displaying all these photos and showing people what you do does allow them to breach copyright. I know that you don't 'own' the mods but then they are being stolen after you've done the donkey work. That's not right. |
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Post by PinkFloyd on Feb 15, 2011 22:34:04 GMT
Actually Mike, displaying all these photos and showing people what you do does allow them to breach copyright. I know that you don't 'own' the mods but then they are being stolen after you've done the donkey work. That's not right. Ian, If I was bothered I wouldn't display any photos and it would be a grey, boring place we all live in.... I'm not in this to "make money", I do it because I enjoy it and enjoy sharing.... the world is a big place, there's room for everybody. One thing's for certain, I certainly would not be sending my amp off to a guy on ebay who has one "blurred" stock photo and an even more fuzzy description of what he actually DOES to the amps |
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mrarroyo
Been here a while! 
Our man in Miami!
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Post by mrarroyo on Feb 16, 2011 0:05:05 GMT
There is always a fool that will send it in, it would be great if such a person would educate themselves before parting with their money.
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Post by PinkFloyd on Feb 26, 2011 22:03:39 GMT
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Post by PinkFloyd on Mar 5, 2011 21:57:59 GMT
05th March 2011 - Robert Kaminski's X-CANS (V1) Panasonic FR (1800uF),Panasonic FM (100uF) WIMA MKS4 (1uF), Nichicon MUSE, Samwha VA (100uF / 130C), UF4001 ultrafast diodes, Burr Brown OPA2134 "soundplus", Voskhod 6H23N-EB valves, Ceramic valve bases, new quad phono socket, Jalco pro headphone socket, ALPS potentiometer, Blue LED and alu knob.......                             |
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Post by bigfanofmac on Mar 5, 2011 22:24:14 GMT
Thanks Mike!
Looks promising :-). I can't wait any longer... to plug in my HD600 and...
Let's see how this (plus brand new Little Pinkie) will change my listening habits.
RK
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I just plop them on top to "dampen" the cap a bit... may sound daft but I believe it helps the overall SQ.
