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Old 28th September 2008, 09:21 PM   #131
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Quote:
Originally posted by salas
First diy 1981, B110+T27...
Wasn't the Daline was it? (HiFi News and Record Review, sometime 1975). This was my 2nd DIY Speaker set.
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Old 28th September 2008, 11:10 PM   #132
Salas is offline Salas  Greece
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No, it was from Sound & Hi-Fi Greek magazine. About 10lt closed, Acoustic Butterworth crossover with no baffle step. Was to be combined with a B139 sub. But I made a bigger one, BR with a double coil Audax 30cm (12inch), sensitive enough unit and a central passive crossover at 170Hz.

*Nicoch46, I am tuning a special 40dB version for the DL-160. Will show soon.
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Old 29th September 2008, 06:44 PM   #133
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Default High MC out version

This is the version that the gain, loading and sound is the best I could find for high output MC. I used the Denon DL-160 as a standard. Sounds really neutral as a combination. In case someone needs some more gain, the Rsource 50R can go down to 33R. I was more than OK with 40dB and the Denon, that looks like producing more than its nominal 1.6mV to me, rather something like 2mV+. But I have sensitive speakers too. The 120nF coupler can be 100nF. The Cout is arbitrary value. See the Salas MC comments on the page before for that.

So we have 3 options: The MC Salas RIAA for 0.5mV, the same can be modified with a 1st stage Rsource bypassing capacitor as shown on its schematic (previous thread page) for +6dB and 0.2mV carts, and this last one with low PSU, and a couple of resistor value changes for high output MCs, 1.5mV-2mV or 1mV with 33R Rs. All 3 options are well tuned, checked, and thoroughly auditioned. Using a variable regulator for B+ someone can easily modify the MC version for high MC in 10 mins with a soldering iron.

That's about it.
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Old 29th September 2008, 06:48 PM   #134
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Here is how the Denon DL-160 measures through the high MC version on Telarc Omnidisc pink noise L+R track.
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Old 29th September 2008, 07:12 PM   #135
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Wow!!

You use 20 v for jfet sweet spot ?

no problem for me, variable psu 18-26 v

yes 2,2mv!
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Old 29th September 2008, 07:16 PM   #136
Salas is offline Salas  Greece
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Yes sweet spot hit, for best stability, no leakage and best THD.
You still have your DL-160? 1k loading worked best in this combination too.
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Old 29th September 2008, 07:25 PM   #137
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dl-160 are on rega ,1k not close the sound stage?


with mad_k I have 23,5k ,with 3k close in ,great difference ....
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Old 29th September 2008, 07:31 PM   #138
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In my case it worked more open and correct @ 1k. It tends to spray HF distortion and more noise with high RL. My guess is that in non neutral systems with a bit of bass boom & beaming HF, high RL compensates and sounds ''open''. But I will listen again with 15k after more break in, maybe my impression is going to change.
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Old 29th September 2008, 07:37 PM   #139
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Quote:
Originally posted by nicoch46
with mad_k I have 23,5k ,with 3k close in ,great difference ....
...Also mad_k has a different distortion profile. More 2nd Harmonic. It also will produce much output with the Denon, and I don't know if it starts saturating with 2nd H above normal, tending to sound thicker.
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Old 29th September 2008, 07:55 PM   #140
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Quote:
Originally posted by salas
My guess is that in non neutral systems with a bit of bass boom & beaming HF
my supravox don't do thorsten L. project....
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