toad
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I am the Super Toad, the Original Toad, the Whole Toad and nothing BUT the toad.... don't forget it!
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Post by toad on Feb 15, 2011 9:40:20 GMT
Hi Toad popped the FMJ IC into my SCHA today and had a quick listen. yes it's a big step forward from the plastic fantastic one . clearer and more focused with better top and bottom extension. the most obvious thing noticed was that the bass had filled out, got deeeeper and was much more in balance with the rest of the sound. TBH i was not expecting much of an improvement (same chip different body) but i was quite gob-smacked with the level of improvement. money very well spent and great service from Simon. thanks Toad for reminding me that i still had unfinished business with the SCHA which now sounds fantastic. it's my second favorite HA Take care Glad you're liking it Shaun. Quite simply the best pound for sound upgrade I've ever done. My Cmoy has benefitted from the metal can too. If the SCHA is your second favourite HA what's your first?
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Feb 16, 2011 5:44:16 GMT
Arggghhhhhhh................., I still haven't pop mine into the X-Dac V3 yet until now!
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Deleted
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Post by Deleted on Feb 19, 2011 18:27:09 GMT
I am working on it for some time already (collecting stuff and contemplating the power supply now) It uses ... LM4562... a few of them in different topologies just because they have the lowest possible distortion WHEN apllied correctly. In C'moy designs with a single op-amps they are certainly NOT applied correctly. They were not designed for that use. NO boutique stuff and no large electrolytic caps either. it will sound like shite to some and maybe like heaven to others and similar to all my other desings to me... Technically (measuring wise) it will be far superior to my other designs. Come to think of it... perhaps I'll throw in some tailoring switches and variable output resistance.... hmm getting bigger already
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Deleted
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Post by Deleted on Feb 19, 2011 19:06:17 GMT
I am working on it for some time already (collecting stuff and contemplating the power supply now) It uses ... LM4562... a few of them in different topologies just because they have the lowest possible distortion WHEN apllied correctly. In C'moy designs with a single op-amps they are certainly NOT applied correctly. They were not designed for that use. NO boutique stuff and no large electrolytic caps either. it will sound like shite to some and maybe like heaven to others and similar to all my other desings to me... Technically (measuring wise) it will be far superior to my other designs. Come to think of it... perhaps I'll throw in some tailoring switches and variable output resistance.... hmm getting bigger already Excellent Frans, will it be easy to build for electronically challenged people like me!!. Mick.
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Feb 20, 2011 13:28:04 GMT
I am working on it for some time already (collecting stuff and contemplating the power supply now) It uses ... LM4562... a few of them in different topologies just because they have the lowest possible distortion WHEN apllied correctly. In C'moy designs with a single op-amps they are certainly NOT applied correctly. They were not designed for that use. NO boutique stuff and no large electrolytic caps either. it will sound like shite to some and maybe like heaven to others and similar to all my other desings to me... Technically (measuring wise) it will be far superior to my other designs. Come to think of it... perhaps I'll throw in some tailoring switches and variable output resistance.... hmm getting bigger already Hey Frans, May I suggest no op amp and fully discrete. With op amp, it's just going to be one of the many permutation around with good sound, although it will measure better, but nothing special. I choose the AHA as one of the amp to be in my collection as it's fully discrete. Ah, maybe a hybrid amp like that of the MF V8 will be greatest! If possible, design it without using any buffer will be best. Well, hope it doesn't DESINGS as you had written here: and similar to all my other desings to me... as that's more important.
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Feb 20, 2011 13:32:08 GMT
I am working on it for some time already (collecting stuff and contemplating the power supply now) It uses ... LM4562... a few of them in different topologies just because they have the lowest possible distortion WHEN apllied correctly. In C'moy designs with a single op-amps they are certainly NOT applied correctly. They were not designed for that use. NO boutique stuff and no large electrolytic caps either. it will sound like shite to some and maybe like heaven to others and similar to all my other desings to me... Technically (measuring wise) it will be far superior to my other designs. Come to think of it... perhaps I'll throw in some tailoring switches and variable output resistance.... hmm getting bigger already Excellent Frans, will it be easy to build for electronically challenged people like me!!. Mick. With an etched PCB and components coming in a kit form, it will be pretty easy. But when you have to order the components and mount components on a vector board, that will be a different story entirely. Seriously.
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Deleted
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Post by Deleted on Feb 20, 2011 20:32:29 GMT
Why is it at this stage of development of the computer, that if you type at more than a snail's pace, the letters you type are often out of sequence ?
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Deleted
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Post by Deleted on Feb 20, 2011 22:30:16 GMT
Why is it at this stage of development of the computer, that if you type at more than a snail's pace, the letters you type are often out of sequence ? Maybe because computers have developed so rapidly, and humans not at all, that the computers are deliberately and consciously revealing our errors
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Deleted
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Post by Deleted on Feb 21, 2011 2:20:01 GMT
Why is it at this stage of development of the computer, that if you type at more than a snail's pace, the letters you type are often out of sequence ? Maybe because computers have developed so rapidly, and humans not at all, that the computers are deliberately and consciously revealing our errors Hi Chris. Definitely not. I threw the same one up a long while ago in a reply to Valter.Type too fast, and it often won't even keep up with you ! Of course, if you are a one fingered typist, it will not matter ! Alex P.S. e.g. Who the hell is going to type "relpy" when they mean "reply". Look through various forums, and you will see this kind of thing happening all the time.
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Deleted
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Post by Deleted on Feb 21, 2011 8:32:38 GMT
Hi Chris. Definitely not. I threw the same one up a long while ago in a reply to Valter.Type too fast, and it often won't even keep up with you ! Of course, if you are a one fingered typist, it will not matter ! Alex P.S. e.g. Who the hell is going to type "relpy" when they mean "reply". Look through various forums, and you will see this kind of thing happening all the time. Alex, Yes, I'm fully aware of this curiosity, I was just being silly. I looked into it myself some time ago when I thought I was going (more) nuts typing garbage, especially during longer screes when you have better flow. The odd adjacent keyboard character can be put down to human error but more erroneous characters are laid at another door. Chris
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toad
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I am the Super Toad, the Original Toad, the Whole Toad and nothing BUT the toad.... don't forget it!
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Post by toad on Feb 21, 2011 12:38:07 GMT
It uses ... LM4562... a few of them in different topologies just because they have the lowest possible distortion WHEN apllied correctly. In C'moy designs with a single op-amps they are certainly NOT applied correctly. They were not designed for that use. So are you saying that my CMoy hasn't benefited from the metal can LM4562 variant Frans or that I only think it has benefited?
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Deleted
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Post by Deleted on Feb 21, 2011 13:34:20 GMT
I will elaborate about my remark...
These opamps were simply not designed to drive anything below 600 Ohms.
The LM4562 is specified for a minimal 600 Ohm load and goes into current limiting mode when loads below 400 Ohms are applied. In fact it feels most happy driving loads between 2kOhm and 10kOhm. The overload characteristics of opamps are usually terrible.
So what I meant is when used in a C'moy (regardless of brand) and 16 Ohm to 300 Ohm headphones are connected this means that clipping caused by overcurrent protection instead of rail voltage clipping is eminent at low powers already. If you use it with low Ohmic headphones it will work fine at lower volumes. Also the distortion won't be 0.00001 percent anymore but increase one or more factors. It will still be lower then most other opamps in the same condition.
This is true for a lot of opamps used in C'moy amps b.t.w. but as long as you keep the volume below distortion levels it does not matter that much.
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Deleted
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Post by Deleted on Feb 21, 2011 13:52:08 GMT
It happens sometimes when I try to type fast with my 2 finger typing system. Accidents will happen and I am aware I sometimes make typo's. Mostly I re-read my posts and make adjustments. sometimes I simply read over errors or forget to check it or simply don't have the time. I don't think, in my case, it is caused by the buffer that stores the key strokes.
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xerxes
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Post by xerxes on Feb 24, 2011 18:53:28 GMT
I couldn't resist. Here are three of them in my WNA MkII. Sounding fantastic with my Sennheiser HD650s. I bought them from Simon on Ebay and I will be leaving him some glowing feedback, they arrived within 24 hours of the order and he had pre bent and trimmed all the legs for me so it took a matter of minutes to fit them in the DIL sockets.
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mrarroyo
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Post by mrarroyo on Feb 25, 2011 11:33:08 GMT
Very nice work!
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toad
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I am the Super Toad, the Original Toad, the Whole Toad and nothing BUT the toad.... don't forget it!
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Post by toad on Feb 25, 2011 11:51:14 GMT
I couldn't resist. Here are three of them in my WNA MkII. Three! Now that's just greedy
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xerxes
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Post by xerxes on Feb 25, 2011 15:32:32 GMT
Sadly, that's how many it needs, there not actually LM4562, they're the LME49710HA single version, one each for the left, right and ground channel.
I previously had three of the plastic version LME49710NA in there and there's definately a slight improvement, not a night and day difference, but at just a couple of pounds more than the plastic version a worthwile upgrade. I might try some in my other amp.
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Deleted
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Post by Deleted on Feb 25, 2011 15:49:10 GMT
Sadly, that's how many it needs, there not actually LM4562, they're the LME49710HA single version, one each for the left, right and ground channel. I previously had three of the plastic version LME49710NA in there and there's definately a slight improvement, not a night and day difference, but at just a couple of pounds more than the plastic version a worthwile upgrade. I might try some in my other amp. Hi Xerxes have you room for some heat sinks for the LME49's? take care
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xerxes
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Post by xerxes on Feb 25, 2011 16:17:10 GMT
Yes there's room, but when I felt the op-amps they weren't very warm, certainly not hot, what difference would the heat sinks make?
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Deleted
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Post by Deleted on Feb 25, 2011 16:32:31 GMT
Yes there's room, but when I felt the op-amps they weren't very warm, certainly not hot, what difference would the heat sinks make? Hi Xerxes I'm using the stereo chip in the SCHA and the metal chip does run a bit hot. it does sound PDG in the SCHA and was a noticeable improvement over the plastic fantastic. for the price (more so if you have sockets) a no brainer upgrade and great service from Simon. SQ wise i used a heatsink from the start so can't really comment on any improvement that they might have made. however others have said that it gives a small improvement in SQ to keep that chip cooler. I've not used the mono version so again can't really comment but if yours are running cool then i guess maybe you don't need the heatsinks. anyone out there used both who could shed some light on the subject? sorry not tooooo helpful but i try not to comment on things I've not heard for myself. take care
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xerxes
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Post by xerxes on Feb 25, 2011 18:04:40 GMT
No worries, they weren't expensive so I bought some heatsinks anyway. I'll bung them on when they arrive and see if I can hear any difference.
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Deleted
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Post by Deleted on Feb 25, 2011 18:40:10 GMT
No worries, they weren't expensive so I bought some heatsinks anyway. I'll bung them on when they arrive and see if I can hear any difference. Hi Xerxes sounds like a plan to me. let us know your thoughts after fitting the heat sinks. take care
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toad
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I am the Super Toad, the Original Toad, the Whole Toad and nothing BUT the toad.... don't forget it!
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Post by toad on Feb 25, 2011 18:58:28 GMT
No worries, they weren't expensive so I bought some heatsinks anyway. I'll bung them on when they arrive and see if I can hear any difference. Can you tell me where you got the heatsinks xerxes? If they make even a small difference I'll get some myself. Thanks Ian
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Deleted
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Post by Deleted on Feb 25, 2011 20:00:16 GMT
The LME49710HA doesn't need a heatsink as it dissipates only half the heat of the dual version LM4562HA /LME49720HA. Alex
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xerxes
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Post by xerxes on Feb 25, 2011 20:30:30 GMT
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