Salas
did you make the layout of the psu with Lochmaster or simply by direct soldering?
When you used lochmaster: can I have the file, please?
Time to build the psu for the phono pre 🙂
Franz
did you make the layout of the psu with Lochmaster or simply by direct soldering?
When you used lochmaster: can I have the file, please?
Time to build the psu for the phono pre 🙂
Franz
Not planned at all, I was just soldering away for both reg and phono without looking at a schematic even.
mmm... better ευχαριστώ (πολύ)
Do you prefer Spain vs. Germany or Argentina 😉 (Messi shooting at Casillas, but all 'n all he's from Real....)
I prefer Germany, we win him the Eurocopa final match😉
ευχαριστώ, I'm doing so in mine Erno Borbely balanced pre-amp for single ended signals.
About new contact surplus teflon caps I can confirm that are aluminium foil, I asked if they have 0.015uF & 0.047uF for RIAA + 2.2uF output cap, also they can serve matched pairs, more news as soon as possible.
Not have 2.2uF, I purchased 2 matched pairs 0.015uF & 2 matched pairs 0.047uF all are teflon aluminium foil, the total paid for the 4 caps by paypal including shipping 79$00, photo:
I will let us know about sonic quality of these but teflons foils seems needs a lot of break-in.
An externally hosted image should be here but it was not working when we last tested it.
I will let us know about sonic quality of these but teflons foils seems needs a lot of break-in.
Are NOS Texas capacitor (Tex-Cap was located in S.W. Houston until closure in the 1980s) series Forty teflon & aluminium foil, looks promising & better than mine SCR Obbligatos tin foil & about price are very affordable speaking "teflon caps", I imagine a sound more transparent, fast & direct than tin foil because use the same aluminium foil like mine output caps Obbligato Polypropylene film.
Just listen to them without expectations, because expectation is a powerful mind drug.
Time will tell.
Time will tell.
No expectations, I owned Hovland polypropylenes & aluminium foil & now I have Obbligatos also poly + alu foil, I own Mundorf poly + tin foil so more or less I know the sound & always is better 1st de dielectric & after the foil: 1st foil copper, 2nd aluminium & 3rd tin (I don't know any teflon film & silver or gold foil)
Yes I need a lot of TIME more or less about 400 hours to break-in well all teflon foils as per information I got in the net.
Yes I need a lot of TIME more or less about 400 hours to break-in well all teflon foils as per information I got in the net.
Don't know about so many hours, those rules of thumb come from enthusiastic audiophiles without controls around their listening sessions and lots of gear and set up tweaks along that time. But I know that a good day shows early in the morning, and you are sure its sunny by noon.🙂
Hello salas and all,
i´ve been absent to this thread quite a while but i´m still interested in building
this pre. Postings and pages are a lot and searching schematics would be awful.
Would anyoney be so kind and post the actual njfet RIAA for cartridges like
lyra dorian and the like? And please add salas reg psu schematics once again
if available.
Aaaand please tell me what IDSS would be ideal for the fets
Thanks and greetings
ulf
i´ve been absent to this thread quite a while but i´m still interested in building
this pre. Postings and pages are a lot and searching schematics would be awful.
Would anyoney be so kind and post the actual njfet RIAA for cartridges like
lyra dorian and the like? And please add salas reg psu schematics once again
if available.
Aaaand please tell me what IDSS would be ideal for the fets
Thanks and greetings
ulf
Salas,
don´t know yet. Have around 70 sk170 in my box but did not measure idss
until now
greetings
don´t know yet. Have around 70 sk170 in my box but did not measure idss
until now
greetings
Measure first, see where your batch averages, find 3 pairs and let me know to give you the best values on a le 'flu cut to measure CCT. Is the Dorian your main cart? 0.6mV 10R Zo?
Hi Salas,
i´m using two tonearms. One with Lyra Dorian which makes 0,60 mV
and another Tonearm where i can use Denon dl103 or AT33ptg. But
there i use a Valve Phonostage. Still on the hunt for a better partner for
the Dorian.
Greetings Ulf
P.S. what is the best way to measure idss? I´ve got a schematic from the
preamp cookbook by A. wright with constant current lm317
i´m using two tonearms. One with Lyra Dorian which makes 0,60 mV
and another Tonearm where i can use Denon dl103 or AT33ptg. But
there i use a Valve Phonostage. Still on the hunt for a better partner for
the Dorian.
Greetings Ulf
P.S. what is the best way to measure idss? I´ve got a schematic from the
preamp cookbook by A. wright with constant current lm317
To me the most simplistic but sure way proved to use a 9V battery (+) in series with a good DVM's red probe in mA setting, black probe to drain, gate and source shorted and back from there to battery (-). Waiting for each reading to stop climbing, noting down on a white A3 paper, sellotape, stick the bug above the reading, make em an army, look for numbers afterwards and forever without mixing. A breadboard will help a lot, not to touch them much (they get upset), and avoid shorts that will blow DVM's fuse, they are tiny thingies. The 100R between drain and battery method and voltage taken across R, deriving mA was near but always a bit short, they tended to pull a bit harder when in circuit.