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  #106  
Old 19-03-12, 02:12 PM
NRWler04 NRWler04 is offline
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Gent's
in short term future I will have available a CPA602 .....

Is somebody interested?

Ingo
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Nytech CA252 & CXA252 with ARC05
Linn LP12
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  #107  
Old 25-03-12, 03:32 PM
synapse synapse is offline
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here's a question that hopefully someone may have the answer to .....if i have a Nytech active set up for ARC 050, what do i have to change to set up for ARC 101.....surely just a couple of component changes?
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  #108  
Old 25-03-12, 04:06 PM
Bob McC Bob McC is offline
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why would it be different?
Both 2 ways, might have the same crossover settings.
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  #109  
Old 25-03-12, 04:17 PM
synapse synapse is offline
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yes, i'm thinking maybe....but i know you could get your amps either set up for 050 or 101....well, they had a sticker on the back saying one or the other
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  #110  
Old 26-03-12, 01:47 AM
oldgit oldgit is offline
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A real mystery :)

Quote:
Originally Posted by synapse View Post
here's a question that hopefully someone may have the answer to .....if i have a Nytech active set up for ARC 050, what do i have to change to set up for ARC 101.....surely just a couple of component changes?
Over the years have used all combinations without our obvious problems when changing speakers/active amps etc. 050/101/102 and mk11 101 with all the tweeter combinations


When production was on going ,was never able to get any sense out of either of the outfits about what was the correct way to go about things.
Change something inside the amp or in the xover bricks ?????????


Would love to know the answer to this.Anybody got any clues
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  #111  
Old 26-03-12, 10:20 AM
Nytecholdie Nytecholdie is offline
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First generation 101s (square tweeter - pretty rare) had HF set to full and LF set to -2dB with tweeter set in phase with base unit (link on the Xover board)

Later generation 101s and 050 (round ARC tweeter) had LF full and HF 1dB down (because of larger dome on tweeter and horn effect of tweeter surround) with tweeter out of phase with base unit


To be quite honest turning both HF and LF to max for either is fine as long as the ARC tweeter is out of phase (do this by swapping the + and - of the tweeter LS connection if you dont want to change the link) as it sounds very "honky" with a midrange hump if theyre left in phase

Still havnt got around to starting refurb of CPA602 yet - Soon!
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  #112  
Old 26-03-12, 12:48 PM
synapse synapse is offline
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That's really very useful nytecholdie......don't suppose you also happen to know what these later tweeters were as it seems it would be simpler all round to ensure these were installed......especially seeing my Nytechs have the 050 sticker but intend to hook up 101s..........which maybe early but I haven't seen them as yet........exciting
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  #113  
Old 01-04-12, 02:18 AM
NRWler04 NRWler04 is offline
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Quote:
Originally Posted by Nytecholdie View Post

Still havnt got around to starting refurb of CPA602 yet - Soon!
Nytecholdie,

do you have the circuit diagram available for the CPA602? If so, could you send me a copy?

Regrads

Ingo
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Nytech CA252 & CXA252 with ARC05
Linn LP12
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  #114  
Old 01-04-12, 02:23 PM
Dago Dago is offline
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help for ION Obelisk 100

Ciao to All

First, I apologize for my English which in reality would not even is mine, but what Google do with my Italian.

There are some months that I follow this forum and I found a philosophy of sound that my ears were hopelessly lost in it. Whit my Gaudio Magno, of course. In recent months I bought a pair of Royd Merlin who are playing with a 30 Watt NVA and I find that they are little jewels. Thanks to you guys!

What I would like to request on this topic has some information on ION Obelisk 100. It happened that I went for the hundredth time on roydaudio dot com and I read that this amp was one of the most loved by Mr. Akroyd.
Out of curiosity I tried one on ebay and I found it right away. And it was sex.

Intensively using Google I found information I would think that the golden age of these amplifications is precisely to Nytech. While on Obelisk 100 with Google are very few details.

Can I ask you to help me in time to place the production of this amp and someone maybe give me some information about?

I personally think it could be the third incarnation of ION before sealing. But it's just a hunch, and I do not have any confirmation of this.

Thanks for your attention and best regards.

Maurizio
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  #115  
Old 10-04-12, 09:45 AM
Nytecholdie Nytecholdie is offline
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I believe the tweeters with the ARC logo were actually assembled at ARC for the 050 and then added to the 101's and 202's. I think the original rectangular tweeter on the 101 may have been a kef unit.

They improved the 101s midrange but made them sound a bit harsher so the good and bad idea debate went through most of the magazines at the time. Dont know who made the component parts though.

Theres a Visaton tweeter I've seen in a catalogue recently which looks very similar and a pair may make a worthy replacement if anyones got a duff tweeter.

In response to NRWler04's question I've drawn out the circuit of the CPA602 module and I'm in the process of double checking it before posting it here.

If you cant wait - The circuit is almost identical to the CTA252/CA252 or first generation ion with a few component value changes and different semiconductors to cope with the 70V supply as opposed to the 56V supply on the 252/ion. Theres a circuit for a first gen Ion in one of the early posts on this thread which can be a useful guide as long as you can see the component values on the cpa602 board.

Hope this helps!
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  #116  
Old 13-04-12, 12:13 AM
NRWler04 NRWler04 is offline
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Quote:
Originally Posted by Nytecholdie View Post
In response to NRWler04's question I've drawn out the circuit of the CPA602 module and I'm in the process of double checking it before posting it here.

If you cant wait - The circuit is almost identical to the CTA252/CA252 or first generation ion with a few component value changes and different semiconductors to cope with the 70V supply as opposed to the 56V supply on the 252/ion. Theres a circuit for a first gen Ion in one of the early posts on this thread which can be a useful guide as long as you can see the component values on the cpa602 board.

Hope this helps!
Thanks Nytecholdie,

yes, this is very helpful. The curcuit from the CA252 is available somewhere in the www. I already have it. We'll start on Sonday with the first CPA602. First we have to bring it back to life again ... then we'll do the recapping.

First I'll test Panasonic cap's and the final "big ones" will be 63V 4700F (F&T or Roederstein Gold) or I have also 63V 6800 F (F&T) or 63V 2200 F Roederstein Gold ..... Another possibility is to recap it with Elna's cap's.

We also want to improve the PSU area with new Slit Foil cap's (63V 10000 F) ....

Maybe there are some other tips to improve the power supply.

I will post some pics about the progress.

Regards from Germany
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  #117  
Old 13-04-12, 06:18 AM
oldgit oldgit is offline
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The Arc range of Speakers.

From memory the ARC range of speakers ran as follows........

050
101
101 mk11 (bought set of these and returned to Billy Vee within 24 hours)
102
202.
Anybody know of any others that were actually made it to the shops as opposed to factory prototypes and one offs etc .
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  #118  
Old 14-04-12, 04:14 AM
DAVOhorn DAVOhorn is offline
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Dear All,

Just joined this forum and lo and behold NYTECH AUDIO is a topic.

I enjoyed 18 months at Nytech Audio back in 1978-1980. it was a fun place to work and the amps were real giant killers with wonderful sound quality.

The Active tri amp system for the Linn Isobarik was superb.

i used to have prototype amps at my flat for listening quality assessments during the development of the pre and power amps.

Also had a prototype speaker in my flat as well.

Fun days

David Cooper
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  #119  
Old 14-04-12, 07:29 AM
mountain biker mountain biker is offline
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Quote:
Originally Posted by DAVOhorn View Post
Dear All,

Just joined this forum and lo and behold NYTECH AUDIO is a topic.

I enjoyed 18 months at Nytech Audio back in 1978-1980. it was a fun place to work and the amps were real giant killers with wonderful sound quality.

The Active tri amp system for the Linn Isobarik was superb.

i used to have prototype amps at my flat for listening quality assessments during the development of the pre and power amps.

Also had a prototype speaker in my flat as well.

Fun days

David Cooper
HI David
What did the triamp system consist of?
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  #120  
Old 14-04-12, 12:24 PM
deltaunit deltaunit is offline
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Hi David,

Thanks for posting, it seems like this thread has attracted a couple of ex-Nytech employees since the last time I checked in so I extend a warm welcome to you both. It's great that the legacy of the company has lived on and that the all important sound quality from these amps is still shining on even today (well mostly!).

One of my hopes when originally posting this thread was to collect together some information on what seemed to be a bit of a mysterious local hifi company that seemed to have produced great things but of which little had been said or recorded online.

We've had some great contributions, stories, images, schematics and price lists etc so far and I hope we can continue to uncover more. It's amazing that a small company 30 years ago created such a thing and is remembered so fondly. It would be great to learn more about how the company operated and developed its products and some of the decisions and innovations that went into them.

I gather from this post that we may yet see another iteration of Nytech, wouldn't that be good, Nytech V4! I hope that everyone here in this thread will get to learn all about it.

---

If anyone has a rough history and timeline for Nytech/Ion and their products I'd be really interested to learn about it. What was made, when and where. Also if there are any brochures, manuals or printed ephemera or reviews of kit etc please post them - it would all be so interesting to see and read about and have documented for the future.

Thanks all.
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