Finally got my F6 running, I needed a bit more gain so I reduced the feedback resistor from 18Ω → 10Ω. Volume control already set to 4 o'clock position for my usual listening levels. Volume control is a multichannel TVC between DCX2496 and amp. Have nor stayed playing with Zen pot; for that I need to get my distortion analyzer working first. I bought a EMU 0204. Any recommendation of software that works well with the EMU in Windows 7 environment please share.
Sound wise similar to the PP1-C EL34 clone which have resident in my system, which competitors of active crossover with this amp driving 4 pairs of Jordan JXR6HD in a open baffle line array. So I'm not disappointed as this is just stock, no tweaks yet. Once I figure out how to post pictures, I'll.
Alex
p.s. This is with the SS I bought from teabag. Will try the match curve pair from Semisouthfan soon.
Sent from my C6903 using Tapatalk 2
Sound wise similar to the PP1-C EL34 clone which have resident in my system, which competitors of active crossover with this amp driving 4 pairs of Jordan JXR6HD in a open baffle line array. So I'm not disappointed as this is just stock, no tweaks yet. Once I figure out how to post pictures, I'll.
Alex
p.s. This is with the SS I bought from teabag. Will try the match curve pair from Semisouthfan soon.
Sent from my C6903 using Tapatalk 2
This is probably the most simple answer. It's referenced in this thread.
I bought a new sound card for this purpose as well, but still need to choose software.
http://www.diyaudio.com/forums/pass-labs/216616-f6-amplifier-488.html#post3552707
The Signal Analyzer | Audio and Signal Analysis and Measurement | Spectrum, FFT, and Time Analysis
Sigview spectrum analyzer - FFT based signal analysis software
Not exactly sure if this one applies. Software enhancements were assisted by DIYaudio.com
HOLM Acoustics
Sigview spectrum analyzer - FFT based signal analysis software
Not exactly sure if this one applies. Software enhancements were assisted by DIYaudio.com
HOLM Acoustics
Might there be any =audible= benefit to power the 2SK and 2SJ via a (smaller) separate power supply from the one feeding the rest of the circuit?
Interesting, thank you. I'd read someone mentioning a potential benefit in so doing. Will do this on my build and compare/report back...
Is it a good thing for the output transistors to have a slowstarter on the powertransformers primaty?
a slowstart shoulnd't affect the output transistors that much. But it will let you use a significantly smaller fuse & a fast blow one which is very nice.
Without a slowstart then the large capacitance in the power supply will create a surge when you start it up, but with the slowstart this surge can be negated.
F6 - Mono or Stereo Power Supply?
For those whom have built the F6 as outlined in the article- is there a benefit to using mono supplies for each channel? Will there be any significant sonic gains?
I have two 500va toroids, but was thinking, if there is no added benefit, maybe one toroid is enough. Then I could save the extra toroid for another future project.
AN-5218 - 500VA 18V Transformer - AnTek Products Corp
What about one toroid, 4 rectifier bridges and two banks of filter caps?
Can there still be cross-talk?
Thanks for your comments.
Vince
For those whom have built the F6 as outlined in the article- is there a benefit to using mono supplies for each channel? Will there be any significant sonic gains?
I have two 500va toroids, but was thinking, if there is no added benefit, maybe one toroid is enough. Then I could save the extra toroid for another future project.
AN-5218 - 500VA 18V Transformer - AnTek Products Corp
What about one toroid, 4 rectifier bridges and two banks of filter caps?
Can there still be cross-talk?
Thanks for your comments.
Vince
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I would be more inclined to make a outboard PSU for the transformer, rectifier and first caps, that will keep the bulk of the switching noise away from the circuit, but much more importantly, keep the big honkin' unshielded toroid away from the little unshielded input transformers...