Recent Posts

Pages: « 1 2 3 4 5 6 7 8 9 10 »
61
Other DACs / ZenDAC in simultaneous mode
« Last post by zenelectro on September 13, 2017, 09:07:34 PM »
One of my jobs ATM is to set up a USB streamer / FIFO buffer that is interfaced to a 1541 DAC (Killer) run in simultaneous mode.

So I have rebuilt / resurrected the ZenDAC which had been used as a parts donor and modded it for simultaneous mode operation.

I'm interested to see how it sounds.

T
62
Suppliers / Re: pure red copper?
« Last post by stevenvalve on September 13, 2017, 07:30:21 PM »
It seems coatings do make wire sound different, just look at the Alpha Core Goertz's M 1 from parts connection. That cable has a coating probably to stop oxidation, and the exact same cable but T2 version that you can only get direct from Goertz has no coating, the T2 version is so much better then the other, WHY. Ask Faraday's laws.   
63
General Information / Re: Marantz CD85 Mod's
« Last post by kajak12 on September 13, 2017, 07:28:06 PM »
Hi All,

I'm considering modifying my Marantz CD85 I really just want to get the most out of the player. I've heard the player makes a great transport when paired with a decent DAC.

My experience with electronics, circuit analysis and soldering is limited so I would need someone to help me with the Mod's.

I'm open to suggestions and would appreciate any advice.

Thanks.
ask zenelectro to do mods like a clock  8)
64
General Information / Re: Marantz CD85 Mod's
« Last post by stevenvalve on September 13, 2017, 07:05:34 PM »
This looks like its the insides of your CD player and it has what appears to be very good capacitors, some have gold strips, Audio Grade, others look like Elna cerafines, not a bad start. To hot this up when you are not a digital know all, is difficult. The analogue section is easier. But where to start. looks to be a CDM4 transport. Hard to see much from this picture. The wire is important, but to tune it depends so much on what your system sounds like. A good start if you are game is bypass the fuse, then run solid core copper wire direct to the main transformer to bypass all the switches, how game are you. How far are you prepared to go.
65
General Information / Marantz CD85 Mod's
« Last post by Levett on September 12, 2017, 10:22:52 PM »
Hi All,

I'm considering modifying my Marantz CD85 I really just want to get the most out of the player. I've heard the player makes a great transport when paired with a decent DAC.

My experience with electronics, circuit analysis and soldering is limited so I would need someone to help me with the Mod's.

I'm open to suggestions and would appreciate any advice.

Thanks.
66
Suppliers / Re: pure red copper?
« Last post by zenelectro on September 12, 2017, 12:08:13 PM »
I have been to a transformers manufacturer, He said they use the high temperature red coloured wire because it is more robust, and they find it more reliable and less returns. Is that true, no idea. does the yellow wire have a lower melting point. It does have a sound that is very different than the yellow wire and not to my liking, but it will also be so system dependant.

Steve,

That's the insulation not the copper. There are various grades of insulation broadly speaking single land double layer, low temp and high temp.
Generally the very dark red is high temp double insulated. Jim usually uses this for reliability reasons.
You may hear very slight difference between the various colour wires, however the transformer core / how hard it's run
will have a bigger effect on the sound for sure.

I had a Marshall that had a kind of weird buzz and didn't sound quite right. Ended up being transformer mounting bolts shorting out on the
end caps constituting a kind of shorted turn and lots of eddy current losses. When I looked at the heater wave form there was a very sharp
spike that was the core 'snapping' off. Make sure your transformer has the little insulating washers on the bolts.

T



 
 
67
Suppliers / Re: pure red copper?
« Last post by yarhevarhe on September 11, 2017, 07:10:43 PM »
Can types beryllium copper (BeCu/CuBe) be red in colour?    It would appear that red copper can also be beryllium based copper (BeCu/CuBe), which can be red in colour, but I don't think that they would be called pure red wire.


OCC/CCC copper can be red in colour https://www.ebay.com/p/20awg-OCC-Pure-Solid-Copper-Magnet-Wire/913168059?iid=112418636937

I have been to a transformer manufacturer, He said they use the high temperature red coloured wire because it is more robust, and they find it more reliable and less returns. Is that true, no idea. does the yellow wire have a lower melting point.
Which type/designation of red wire did the transformer manufacturer say that they use?

It does have a sound that is very different than the yellow wire and not to my liking, but it will also be so system dependant.
Which type/designation of red wire have you listened to?   
I would have thought that a yellow colour would be brass, which can be yellowish, but do you know the type/designation of the yellow wire that you are familiar with?


68
Suppliers / Re: pure red copper?
« Last post by stevenvalve on September 10, 2017, 02:28:56 PM »
I have been to a transformers manufacturer, He said they use the high temperature red coloured wire because it is more robust, and they find it more reliable and less returns. Is that true, no idea. does the yellow wire have a lower melting point. It does have a sound that is very different than the yellow wire and not to my liking, but it will also be so system dependant.
69
Suppliers / Re: pure red copper?
« Last post by yarhevarhe on September 09, 2017, 11:51:12 PM »
It would appear that pure red copper can be many types of Copper... T2, T3, TU1, TU2, TP1, TP2, C11000 and there are probably other types.  The purity seems to be 99.9% and higher.   Overall, quite a few types and it seems to also depend on the country of origin.
70
Amplification (Pre/Power) / Re: How to Build a killer Amp
« Last post by Pixelplay on September 09, 2017, 10:18:18 PM »
Well I am 90% there to getting my ux250 killer amp bits together and feeling very excited.
Thanks Steve for all of your help and wisdom so far.

Pages: « 1 2 3 4 5 6 7 8 9 10 »