Recapping of Nytech CPA 602
- Thread starter NRWler04
- Start date
Problem solved, the screws which fixed the toroid in the housing was to long. Touched the bottom and the top of the housing. Must be a very stressy magnetic field. Since I've shortend the screw it get better.
Normal temperature as before the change to the new toroids.
After listening now for several hours I can say that this step was a big improvement for the good old Nytech CPA 602's ....
I can summarize that there is now a wonderful3D stage in my listening room. This was even better in the passiv mode without the electronic crossover. The electronic crossover follows this improvement for 50%.
This will now be the next step to improve.
Gentlemen, any suggestions from you how to improve the electronic crossover from the CXA252?
The ideas so far are:
- Setup also a dual rail power supply for the XO
- Use Vishay Dale CMF55 0.1% antimagnetic resistors
- Use WIMA 1% Film Caps instead of the ceramic ones ...
- and what Else?
Maybe there are some opportunities to improve also the circuits....
Regards from Germany
Ingo
Normal temperature as before the change to the new toroids.
After listening now for several hours I can say that this step was a big improvement for the good old Nytech CPA 602's ....
I can summarize that there is now a wonderful3D stage in my listening room. This was even better in the passiv mode without the electronic crossover. The electronic crossover follows this improvement for 50%.
This will now be the next step to improve.
Gentlemen, any suggestions from you how to improve the electronic crossover from the CXA252?
The ideas so far are:
- Setup also a dual rail power supply for the XO
- Use Vishay Dale CMF55 0.1% antimagnetic resistors
- Use WIMA 1% Film Caps instead of the ceramic ones ...
- and what Else?
Maybe there are some opportunities to improve also the circuits....
Regards from Germany
Ingo
Hi Mike,
A friend of mine wants to setup a 4th order crossover (Linkwitz& Riley) with BurrBrown OP's.
What about to design it in a discrete way? I like Cap's
Regards from Germany
Ingo
It cost only 79€ ..... Worth to try it
But works only with XLR-Connectors .... No glue how to connect it.
Thanks Mike
It's progressing ....
The PSU's are finished.
Tomorrow I get new Toroids for my 602's with 2 x 58V ..... Then I will assemble it ..... and will listen to the difference
Does it make sense to try this Vishay Cap's in the PSU?
http://de.rs-online.com/web/p/aluminium-elektrolytkondensatoren/1802144/
What will be the benefit? Or should I go with Panasonic ...
http://de.rs-online.com/web/p/aluminium-elektrolytkondensatoren/0127587/
http://de.rs-online.com/web/p/aluminium-elektrolytkondensatoren/3397111/
Or what else .....
i only dabble with exotic capacitors.
my esp cross over uses burrbrown op amps. It's small and easy to build and it's performance is excellent. (to my ears). The design uses discrete capacitors and resistors to set the cross over points. The active components could be replaced by discrete components, but the expense and complication would be huge. The design does have opamp buffers which could be replaced by discrete buffers.
I have contacted the designer about power supplies for the op amps. His view is that the op amps have a high power supply noise rejection so super regulators are not necessary.
I use adapters with my behringer Cx2310. This spoils the low cost, but hey...
my esp cross over uses burrbrown op amps. It's small and easy to build and it's performance is excellent. (to my ears). The design uses discrete capacitors and resistors to set the cross over points. The active components could be replaced by discrete components, but the expense and complication would be huge. The design does have opamp buffers which could be replaced by discrete buffers.
I have contacted the designer about power supplies for the op amps. His view is that the op amps have a high power supply noise rejection so super regulators are not necessary.
I use adapters with my behringer Cx2310. This spoils the low cost, but hey...
Short update: September 24th 2012
Toroids for my 602s Clone arrived from Poland ...
The two small ones are for the 602s in Dual Mono Design ... the big one is for the HiCap Clone.
The two small ones fit perfectly into my new housing.
I'll keep you updated ....
Regards from Germany
Ingo
Toroids for my 602s Clone arrived from Poland ...
The two small ones are for the 602s in Dual Mono Design ... the big one is for the HiCap Clone.
The two small ones fit perfectly into my new housing.
I'll keep you updated ....
Regards from Germany
Ingo
I like the white lettering but would do it a bit smaller. And - sorry to say - I do not like the odd black/grey colours... Why didn't you leave it pitch black like the first case?
It may be very difficult to make but the lettering could be cut out and made with translucent material which glows slightly when the amp is on (either all in acrylic or alu)
It may be very difficult to make but the lettering could be cut out and made with translucent material which glows slightly when the amp is on (either all in acrylic or alu)
The grey colour should only visualize a light effect. Finally it will be just black;-)
Hi David,
within this week we will also design the front of the NERO PRE 42.5, which is the PreAmp. It should be on design line
There will be also a Power Supply (NERO SP-1), an active XOver (NERO XO-1), a Ph ONO Pre (NERO PP-1) with dedicated Power Supply (NERO PPP).Actually I don't know what the "L" contributes to the symbology. I have to ask the Designer, but I like it ....
Gentlemen,
with the help of Nytecholdie, lohk and myself did a first step to improve the electronic Crossover from Nytech.
Based on the original XO the idea was, to setup a XO with a dual rail supply and following our Policy "As good as possible ..."
Here are the schematics ....
We added a Voltage regulator for HF and LF each and added some CCS ....
the Boardlayout ....
and the Board with Routing ....
My new housing is a little bit to large for the EXO ...
The components I will use are:
- The Resistors related to the Voltage supply will be Yagoo's 0.1%
- Resistors in the Signalpath will be Vishay Dale CMF55 0.1% Non Magnetic
- Capacitors in the Voltae Regulators, the best Tantal's I can get ...
Which one should I buy? Any ideas?
- Capacitors in the Signal Path: ELNA Silmic 2 - 10µF 35V
- Film Cap's will be WIMA 1% or Voshay Roederstein 1%
Your ideas and comments are warmly welcome ....
Regards from Germany
with the help of Nytecholdie, lohk and myself did a first step to improve the electronic Crossover from Nytech.
Based on the original XO the idea was, to setup a XO with a dual rail supply and following our Policy "As good as possible ..."
Here are the schematics ....
We added a Voltage regulator for HF and LF each and added some CCS ....
the Boardlayout ....
and the Board with Routing ....
My new housing is a little bit to large for the EXO ...
The components I will use are:
- The Resistors related to the Voltage supply will be Yagoo's 0.1%
- Resistors in the Signalpath will be Vishay Dale CMF55 0.1% Non Magnetic
- Capacitors in the Voltae Regulators, the best Tantal's I can get ...
Which one should I buy? Any ideas?
- Capacitors in the Signal Path: ELNA Silmic 2 - 10µF 35V
- Film Cap's will be WIMA 1% or Voshay Roederstein 1%
Your ideas and comments are warmly welcome ....
Regards from Germany
Update 15.10.2012 ....
PCB's are in production ......
For the voltage regulator I will use KEMET Tantal Caps T110/T360 ....
For the signal Path on the XO ELNA Silmic 2 Caps and WIMA 1% Foils ....
Resistors in the Signal Path will be Vishay Dale CMF55 0,1% - Non Magnetic. Any resistors related to the voltage supply will be Yagoo's 0,1%.
Voltage Supply comes from my HiCap-Clone.
PCB's are in production ......
For the voltage regulator I will use KEMET Tantal Caps T110/T360 ....
For the signal Path on the XO ELNA Silmic 2 Caps and WIMA 1% Foils ....
Resistors in the Signal Path will be Vishay Dale CMF55 0,1% - Non Magnetic. Any resistors related to the voltage supply will be Yagoo's 0,1%.
Voltage Supply comes from my HiCap-Clone.