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Old 31st July 2006, 07:40 PM   #1
bulgin is offline bulgin  South Africa
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Hi

I have a Nagatron HA 9000 phono pre step-up device for mc carts. I bought it second hand a long time ago and only recently received some specs published in Stereo Review in December 1978.

All previous enquiries on various boards re other users of this marvellous device, drew blanks.

Any other users out there??

Regards

bulgin
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Old 1st August 2006, 04:57 AM   #2
EC8010 is offline EC8010  United Kingdom
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Perhaps a photograph or two would help?
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Old 1st August 2006, 10:06 AM   #3
bulgin is offline bulgin  South Africa
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Hi EC8010

I have a digital camera, I have pics on my computer and I MUST sort this pic posting biz out shortly.

Thanks for the interest. This Nagatron device is very good. I don't know where they all disappeared to. I often thought do I have the only one outside Japan? There was also a matching cart with this equipment - the Nagatron HV-9100 - which was a ribbon transducer with a single turn of wire or ribbon for each channel, with an exceptionally strong magnet (neodymium?) and an output of 0,04mV.

Regards

bulgin
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Old 1st August 2006, 11:15 AM   #4
Netlist is offline Netlist  Belgium
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http://www.vinylengine.com/phpBB2/al....php?cat_id=54

/Hugo
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Old 1st August 2006, 11:28 AM   #5
bulgin is offline bulgin  South Africa
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Hi Hugo

That's mine! A friend posted it for me.

Thanks

bulgin
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Old 1st August 2006, 05:09 PM   #6
EC8010 is offline EC8010  United Kingdom
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MC step-up pre-amplifiers are usually fairly simple, so a few good photographs could probably enable deduction of the circuit.
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Old 1st August 2006, 06:14 PM   #7
sreten is offline sreten  United Kingdom
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Hi,

according to another post elsewhere

Quote:
The Nagatron HA-9000 pre pre-amp was a closed book to me for the last 12 years or so I've had it.
During 2005, esteemed VE member Starboy sent me very kindly, some neatly bound specs which I quote for
general interest: Nominal gain 40dB which equates to a voltage gain of 100x. Frequency response 10 to
200'000Hz +- 1dB. Total harmonic distortion of 0,01% @ 1'000Hz. Input impedance = 20 Ohm. It is of course
battery powered by 4 C cells for each channel (which last for months). I can't see inside as it's copper and
alu casework is either glued or soldered shut. Everytime I see a tinopener, I am tempted but have resisted until now...
Though the DC part in the name worries me slightly,
does it deliver DC also for some exotic cartridge ?
(could mean direct coupled though.......)

It is the correct gain for 40uV, very low output, too much for most
cartridges in that you may get clipping issues in the MM stage.

/sreten.
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