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Old 14th November 2002, 05:11 PM   #11
Electrons are yellow and more is better!
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Location: Göteborg, Sweden
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Quote:
Originally posted by Christer
BTW Per-Anders, I think you recommended using either of
the LT amps in your phono amp? Why not AD797? Have you tried
it and didn't like it?? There seems to be a number of
commercial designs using AD797, but I haven't heard of one
using either of the LT amps, so it would be interesting to know
you reasons.
I have chosen LT1028/1115 as a start because I have a bunch of them. I will also try OPA134. OPA627, will test it in my headphone amp.

I have made my designs as universal as possible so it's up to the builder to choose opamp. Most types fits.
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Old 14th November 2002, 05:27 PM   #12
UrSv is offline UrSv  Sweden
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Looks a bit tinky in general. Finest possible audio caps seem to be Icel and Wima. Shortest possible cable length is apparently 150 mm...


/UrSv
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Old 14th November 2002, 08:21 PM   #13
halojoy is offline halojoy  Sweden
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is this really a DUAL MONO
No, not as I see it

for me dual mono uses 2 boards, 2 trafos (at least 2 rectifiers)

isn't that a stereo configuration
if not, what is a stereo?
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Old 14th November 2002, 08:27 PM   #14
Electrons are yellow and more is better!
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Quote:
Originally posted by halojoy
is this really a DUAL MONO
No, not as I see it

for me dual mono uses 2 boards, 2 trafos (at least 2 rectifiers)
If the channels are isolated from each other, it's dual mono. It makes no difference if the channels are on one pcb or two, as long as there is isolation.
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Old 14th November 2002, 08:29 PM   #15
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Default MC PREAMP.

Hi,

From what I saw on the pics they could have rearranged the layout in such a way that the RCA in- and output could be soldered straight to the PCB.

Also it would be useful to have the dipswitches for cartridge loading where they can be set without opening the case.

Just my two eurocents,
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Old 14th November 2002, 08:29 PM   #16
Electrons are yellow and more is better!
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What is Coph Nia besides a band? What does it mean?
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Old 14th November 2002, 08:46 PM   #17
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Default long as there is isolation

And what exactly is isolated in this case? The term dual mono is just an advertising gimick except for in power amps where the ability to put each amp close to the speaker is desired. Sharing a common supply and grounding does not sound much like dual mono to me. For the amount of money this guys is charging you would think a seperate power supply chassis would be in order. I looks like a very overpriced and mediocre design to me.....

Underwelmed,
Fred
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Old 14th November 2002, 09:03 PM   #18
Electrons are yellow and more is better!
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For me is dual mono ISOLATED channels with ISOLATED power supplies but the signal grounds can (or must) be connected at the output.
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Old 14th November 2002, 09:04 PM   #19
UrSv is offline UrSv  Sweden
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Coph Nia seems to be a magic wand in, IMHO, what seems to be the nutcase religion of O.T.O. Ordo Templi Orientis. Description is from their Book of the Law:

"the Double Wand of Power; the wand of the Force
of Coph Nia"

PLEASE don't put me in the sinbin for this picture from my current country of residence:

/UrSv
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Old 14th November 2002, 09:14 PM   #20
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Talking Coph Nia

Don't those ladies get a cold so high up in the mountains without warm clothes???
And why do the men have a blanket?

BTW another opamp based phonostage?! We can make it DIY!
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