Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build

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ebag4

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #220 on: 9 Jul 2017, 05:44 am »
Hey, not sure if you  guys flipped the wiring  in the netowrks  or not but,   the  tweeter should be wired   out of phase,   in the pics , it look s like you've got red to + ( if you flipped wiring inthe network, that's fine , but if not,    they need to be reversed).  Good catch Don :beer:

Also driving the pair here with a chip amp, one of the Folsom 7297/Antiopole  setups,  upgraded caps, wire,  and a Lundahl trans

jay
Thanks for the heads up Jay/Don, but yes, I changed color in the network wiring.

Best,
Ed

Captainhemo

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #221 on: 9 Jul 2017, 06:27 am »
Just wanted to be sure  !
Had I not been so lazy, I'd have gone back  and  actuallyre-visited the pics  :)

jay

mlundy57

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #222 on: 9 Jul 2017, 07:07 am »
I built my networks externally so I can switch the phase at the network. That said I forgot about that little fact when I set the speakers back up after the show. For the life of me I couldn't figure out why they sounded so much better at the show.  :duh:

I'm going to reverse the wires at the driver because I know the next time I take them apart I'll forget to switch the phase when I reconnect the network.

At least now the image is properly centered and staying there and voices are back up to a normal height rather than too low.

Mike

lacro

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Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #223 on: 9 Jul 2017, 01:03 pm »
Also driving the pair here with a chip amp, one of the Folsom 7297/Antiopole  setups,  upgraded caps, wire,  and a Lundahl trans

jay

Jay, Did you finally add the Lundahl transformer to your amp build?

Captainhemo

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #224 on: 9 Jul 2017, 05:14 pm »
Jay, Did you finally add the Lundahl transformer to your amp build?

hey Larry,,   yeah I did,  I actually thought I had sent yo uan email about it but obiously not  :duh:
Still not in a proper case, just  a bigger test board.... got tired of seeing the  Antipole and Lundahl trans sitting on the shelf . It's a pretty amazing little amp,  not quite as dimensional as the  6C33C mono's but awfully close.

jay

mlundy57

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #225 on: 9 Jul 2017, 09:14 pm »
Hey, not sure if you  guys flipped the wiring  in the netowrks  or not but,   the  tweeter should be wired   out of phase,   in the pics , it look s like you've got red to + ( if you flipped wiring inthe network, that's fine , but if not,    they need to be reversed).  Good catch Don :beer:

Also driving the pair here with a chip amp, one of the Folsom 7297/Antiopole  setups,  upgraded caps, wire,  and a Lundahl trans

jay

Jay,

What caps, wire and transformer did you use?

Mike

Captainhemo

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #226 on: 9 Jul 2017, 09:44 pm »
Mike,
I used 1 uF  sonicaps bypassed with .022 Jupiter Coppers as input caps.
All  the PS caps are  the optional Nichions speced in the BOM.
transformer is a Lundahl  ll1928, parallel the inputs and outputs, plus there   is a   pair of   10v outputs you can use for   something  else ?    Sent on to Larry too and he was able to use the  10v outputs  to power a DAC.
Wire  was  the 24 ga solid core Neotech  from Zenwave  for inputs, some mil spec  silver coated copper for  outputs,  and a mix of   Neotech 16 ga OCC copper and  danny's wire  for PS / Antipole.  Once I put it all in a case,  I'll likely replace it all with the Neotech in various  gauges

jay

ebag4

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #227 on: 11 Jul 2017, 12:59 am »
Ed, I sincerely wish I would have had the pleasure of following this thread from day one. I'm sad I just now found it (through the "Let's see your OB thread").
Honestly, I just now skimmed the first page, then jumped to the last page to comment, I hope to find the time to catch up.

In the first post, you said the burl veneer was "this is a plane tree burl".
This looks a LOT like a Pelin Burl build I did. Is that what it is?

Anyway, I'd like to complement you on a beautiful build. Well done Sir!  :thumb:
Hey Bob, sorry I missed your question.  I read that the Plane Tree is related to the Sycamore, I am not familiar with the Pelin Burl.  I now know that if want a highly reflective finish I should start with something a little more smooth and defect free than a Burl, at least that is the conclusion I have drawn from this experience.

Best,
Ed

Plund

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #228 on: 14 Jul 2017, 02:30 am »
Ed, Very sad to see that you have placed yourself in such a terrible predicament!  With this extremely nice looking build and sound quality to match, you may have a difficult time bettering these on your next build...so sorry!  Congratulations!

Pete

ebag4

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #229 on: 14 Jul 2017, 04:38 am »
Ed, Very sad to see that you have placed yourself in such a terrible predicament!  With this extremely nice looking build and sound quality to match, you may have a difficult time bettering these on your next build...so sorry!  Congratulations!

Pete
:lol: Thanks Pete, I'll try to muddle through. :wink:.

Best,
Ed

gregfisk

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Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #230 on: 14 Jul 2017, 05:41 am »
Ed, Very sad to see that you have placed yourself in such a terrible predicament!  With this extremely nice looking build and sound quality to match, you may have a difficult time bettering these on your next build...so sorry!  Congratulations!

Pete

Very funny Pete, Ed is a master builder for sure.

Greg

lacro

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Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #231 on: 14 Jul 2017, 02:37 pm »
Thanks guys.

I wanted to give a brief update on the sound.  I have them breaking in on the Folsom amp I built last year, great synergy here, really excellent pairing, makes me wonder if Danny voiced these speakers using his little chip amps.

Sometime after 50 hrs the speakers bloomed, they are sounding fantastic, similar to the Wedgie but more weight and more dynamic.  More later.

Best,
Ed

FYI: If anyone is interested in trying the Folsom chip amp, there is currently a group buy over at DIY Audio for the amp, and power supply PCB's. These easy to build, inexpensive little chip amps do very well driving GR Research speakers. http://www.diyaudio.com/forums/group-buys/309860-folsom-diy7297-amp-antipole-psu.html#post5128286

Here's Captainhemo's Folsom amp board with some upgrades:


limits

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #232 on: 14 Jul 2017, 03:13 pm »
...A few questions for Jay and Larry, if I may  :D --where did you source the Jupiter caps? Have you heard the amp both with the Nichicon and the Panasonic oscons? Did you notice a difference between the two? I think Jeremy mentioned in his original documentation that the Panasonics were a little more laid back (which I would prefer). Just wondering if you heard both...

Larry--masterful job on building up that amp!! It would seem a shame to hide it away in a case  :thumb:

limits

lacro

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Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #233 on: 15 Jul 2017, 01:19 pm »
Ed: Apologizes for hijacking your build thread.....


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gmurray618

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #234 on: 16 Jul 2017, 11:47 pm »
Thanks for the tip lacro

I just ordered the boards. 

ACHiPo

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #235 on: 23 Jul 2017, 11:37 pm »
Ed,
I haven't checked this for a while.  Outstanding work!  Can't wait to hear how they sound!

ebag4

Re: Veneer Question/ NX Ottica MTM-H Frame Servo Bass Build
« Reply #236 on: Yesterday at 05:15 pm »
Ed,
I haven't checked this for a while.  Outstanding work!  Can't wait to hear how they sound!
Thanks AC!  They are sounding very good, I am approaching 200 hrs so they should be broken in or very close.  I am playing with room position and REW, once I have that locked down I will report back on the sound.

Best,
Ed