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Post by ariel on May 9, 2016 1:07:24 GMT -6
My jaw is on the floor. Nice work man! Really interested in how the EQ additions sound. Was thinking about grabbing them for my pair but can't seem to part with the custom faceplates on mine  Thanks m8! Re the eq version I've recorded with it a couple of times and for the very moderate eq I do when recording I found it nice, pleasant and doing the job. However just the other day, in mix, I did a brief A/B with my AMS/Neve reissues on acoustic and snare. I found it lacking the character I associate with the Neve 10-series. Now what would attribute to lacking in character ? any thoughts from anyone why that may be if it is following the same design ? |
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Post by tonycamphd on May 9, 2016 6:46:37 GMT -6
My jaw is on the floor. Nice work man! Really interested in how the EQ additions sound. Was thinking about grabbing them for my pair but can't seem to part with the custom faceplates on mine Thanks m8! Re the eq version I've recorded with it a couple of times and for the very moderate eq I do when recording I found it nice, pleasant and doing the job. However just the other day, in mix, I did a brief A/B with my AMS/Neve reissues on acoustic and snare. I found it lacking the character I associate with the Neve 10-series. Ahhh grasshopper, Now is when u start to really DIY, you must fiddle and tweak until u get "the sound", its in there, you gotta coax it out pal! btw, me calling you "grasshopper" is the funny part 8) |
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Post by tonycamphd on May 9, 2016 6:48:27 GMT -6
You have to run audio through the units for a long number of hours before they are properly broken in, and yes they will change!
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Post by Deleted on May 9, 2016 11:50:04 GMT -6
After maybe 48 hrs of continuous operation nothing should change in sound anymore, for a longer time....
I guess this is a rule of thumb type of time period for all units?
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Post by Cyrus Melchor on May 12, 2016 16:49:19 GMT -6
OK, this thread worked. I don't post much here but I have seen this long thread and the mass production undertaking of unit7.
I just ordered one (w/ the eq add on).
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Post by unit7 on May 12, 2016 18:16:37 GMT -6
 Ok Cyrus Melchor since I feel somewhat responsible the least I could do is to share the working order I've worked out based on the size of the components. Hope you'll enjoy the build/pre! Oh, and if you haven't ordered from Mouser yet, and if you'll use the transistors from the Mouser chart, get a few more (price drop at 10pc) and put highest HFE at T4A and T1C. Bottom side first Diodes & small resistors (R44 & dlyR2) Resistors (except R3B) Transistor sockets Laying caps: C6C, C13A, C5C, C12A, C6B Laying polystyrene: C5B, C2B & C11A Larger laying caps: C9C, C17A 24V version: Use cut off legs from C9C/C17A for bridge Tantalum och standing resistor R3B (68k) Green connectors Inductors and fuses Switches Standing polystyrene (8 pc) 2N3055 Trim resistor 16V version: 4xheader for 16->24V PCB Standing 47uF caps Greyhill switch (GAIN) Large caps: C4 & C7C8
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Post by Cyrus Melchor on May 12, 2016 22:58:36 GMT -6
Thanks Paul.
What a good responsible peer pressure leader you've shown yourself to be.
Yep, I made my mouser order already and I went ahead and grabbed 100 of the 549s and 547s.
Though I do have a handful of BC184C's already, we'll see which way I go. Either way, high HFE ones at T4A and T4C noted.
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Post by unit7 on May 13, 2016 15:45:43 GMT -6
Cyrus Melchor sorry for messing up the high HFE transistor designation. I've edited my post now. Since you are building the eq version right on (not adding eq to an already built pre) I've got a couple of tips to save some time not having to disassemble/re assemble the pre completely after it's tested and calibrated: - Solder the shielded wire (from P to P) on the top side of the main PCB - Before test/calibration don't use the nuts for the heatsink, just squeeze it in place on top of the 2N3055 - After calibration, to be able to reach the screws on the 16->24V PCB, remove the heatsink and then unscrew/remove the 16->24V PCB - If you have an iron with a pointy tip you should be able to unsolder both wires at P (close to the trim resistor) from the top side of PCB, and then re wire the ends to the eq boards - Prepare/solder the 24V wire for the eq boards. I chose to squeeze it in the +24V terminal on the green 4 way terminal on the 16->24V board - Re assemble 16->24V board and heatsink secured with nuts this time - Proceed with the Don Classics manual For this to work here are the wire lengths that have worked for me (including stripped ends of approx 3-4mm): - Shielded cable: 11cm (after calibration could be cut to proper length for rewiring to the eq boards) - Output pot wires: 6cm minimum for the K wire to reach the eq board after it has been desoldered from P at main board. Not important but the 0V wire could be 0.5-1cm shorter because it's pad is closer to the output pot - 48V switch wires: 8cm has worked for me
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Post by kilroyrock on May 26, 2016 9:24:00 GMT -6
So I am looking through this - I thought the don classics nv73's were for use with a 51X rack only? It looks like you can run these in any 500 series rack, and you just do a few different connections one way or the other?
Am I seeing this wrong? I know that TRUE neve's are 24v.. but passed that (and the +- 16v = 32v), it'll work?
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Post by mulmany on May 26, 2016 15:07:48 GMT -6
Yes they will run in a 16v rack as long as the voltage converter is installed.
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Post by unit7 on Jun 19, 2016 16:34:48 GMT -6
Said I would be back with a pic w units racked so here it is. Though ten of them are for a couple of friends, this could be (should be) the largest gathering ever of these pres :-)  All but two of the latest 20 builds worked from the bench. One measured fine but was dead, with an easy to find faulty wiring. The other was a bit tricky with the case of the 2N3055 not connecting to the o/p xformer except while measuring/pressing the probe on it. Really tricky to sort out... Checked over and over and compared to a healthy unit before finding that the fastening screws for this particular 2N3055 had to be tightened insanely hard. Finally just want to praise David of Don Classics who is super helpful, great at troubleshooting. A tip is to email instead of posting at GDIY when you need him. Over and out! |
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Post by mulmany on Jun 19, 2016 18:53:23 GMT -6
Said I would be back with a pic w units racked so here it is. Though ten of them are for a couple of friends, this could be (should be) the largest gathering ever of these pres :-) View AttachmentAll but two of the latest 20 builds worked from the bench. One measured fine but was dead, with an easy to find faulty wiring. The other was a bit tricky with the case of the 2N3055 not connecting to the o/p xformer except while measuring/pressing the probe on it. Really tricky to sort out... Checked over and over and compared to a healthy unit before finding that the fastening screws for this particular 2N3055 had to be tightened insanely hard. Finally just want to praise David of Don Classics who is super helpful, great at troubleshooting. A tip is to email instead of posting at GDIY when you need him. Over and out! That's crazy! It always boggles my mind to calculate cost... that is well over $26k product. Neatly sitting in a few racks. Always gives me pause, and reminds me to increase my insurance. |
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Post by ariel on Jun 20, 2016 18:02:35 GMT -6
Wow what a lovely sight indeed ! those units with the eq look stellar. Ill have to get on this down the road.
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Post by sam on Jun 23, 2016 9:49:46 GMT -6
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Post by ariel on Jun 29, 2016 2:41:31 GMT -6
Since Brexit happened and the drop of the British pound, carnhills should be a bit cheaper now ! |
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Post by jcoutu1 on Aug 26, 2016 5:59:21 GMT -6
Said I would be back with a pic w units racked so here it is. Though ten of them are for a couple of friends, this could be (should be) the larges2t gathering ever of these pres :-) View AttachmentAll but two of the latest 20 builds worked from the bench. One measured fine but was dead, with an easy to find faulty wiring. The other was a bit tricky with the case of the 2N3055 not connecting to the o/p xformer except while measuring/pressing the probe on it. Really tricky to sort out... Checked over and over and compared to a healthy unit before finding that the fastening screws for this particular 2N3055 had to be tightened insanely hard. Finally just want to praise David of Don Classics who is super helpful, great at troubleshooting. A tip is to email instead of posting at GDIY when you need him. Over and out! Hey Paul, I think you have too many of these now. You should trade me a pair for a pair of Tonelux TX5C compressors. |
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Post by ariel on Oct 18, 2016 22:22:45 GMT -6
Has anyone compared the NV73 and the AML ez1073 ? I have been looking at either of these two.
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Post by terryrocks on Jan 21, 2017 11:35:15 GMT -6
Also, what does the price per unit come out to?
I'm debating these vs sca, but i don't want to deal with sca's proprietary rack.
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Post by mulmany on Jan 21, 2017 14:37:54 GMT -6
Also, what does the price per unit come out to? I'm debating these vs sca, but i don't want to deal with sca's proprietary rack. I think they ended up around $800. Shipped to USA. |
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Post by terryrocks on Jan 21, 2017 20:16:51 GMT -6
that's assembled, right?
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Post by mdmitch2 on Jan 21, 2017 20:45:25 GMT -6
Also, what does the price per unit come out to? I'm debating these vs sca, but i don't want to deal with sca's proprietary rack.T Thanks to brexit these are a little cheaper than they used to be. I just did the math real quick, and it's around $440 with shipping. I think mulmany was talking about the AML kit. |
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Post by mulmany on Jan 21, 2017 22:55:35 GMT -6
That's all parts, kit, BOM, parts from AML, and shipping. |
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Post by terryrocks on Jan 21, 2017 22:58:46 GMT -6
Sorry, I was talking about the nv73
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Post by mulmany on Jan 21, 2017 23:10:44 GMT -6
Thanks to brexit these are a little cheaper than they used to be. I just did the math real quick, and it's around $440 with shipping. I think mulmany was talking about the AML kit. Nope, NV73... It may be closer to $600, but considering all the other '73 clones are way more expensive. It's still a deal. Just not quite the same as a CAPI. I even built mine for 51x so saved the money on the voltage converter. OK, I am crazy... It's about $400 with out shipping. |
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Post by jcoutu1 on Jan 21, 2017 23:13:54 GMT -6
Also, what does the price per unit come out to? I'm debating these vs sca, but i don't want to deal with sca's proprietary rack.T Thanks to brexit these are a little cheaper than they used to be. I just did the math real quick, and it's around $440 with shipping. I think mulmany was talking about the AML kit. This is a damn fine deal. Wow. |
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Ok 
