Yes. There are not any shared grounds or anything between the channels except back to the 120v AC. No hum against 97db speakers.
So far it images as well or better than a 1.5R biased DCB1 does with a shared supply. It's a slightly cleaner sound, so maybe a bit less warmth. I am working towards a side by side tests. Just trying to button up and tune a little for now. After hearing dual mono on the DCG-3 I has wondering if the dual mono concept could be benefited in this legacy design. Need to side by side that with my neighbor sometime soon. He is fond of the DCG-3.
Some used to do that with v1.0 and said it was nice. At least with heaters you know a stable current consumption so you don't idle the reg too high just in case...
Nice chimneys and high quality parts
How do you like it now? I mean sound-wise.
Cute... if the bottoms are open.
Cute... if the bottoms are open.
There is one round hole at the PCB under each chimney I think?
Nice chimneys and high quality parts
How do you like it now? I mean sound-wise.
Soundwise I like it much better than LT3045 that used for this purpose. Changes are noticable no so much on the base but rather on trebble, which become more clear.
Chimneys have the hole at the botton on pcb and also in the chassis to allow free airflow.
Another Ultra Bib is powering ak4497 VDD L/R @ 5V directly and one Reflector-D running @5V is powering local LDOs: DVDD + Clocks + Fifo + Digital Isolator 3.3V, DVDD Core 1.8V, AVDD 3.3V. USB Xmos is powered by LT3045 on dirty isolated side.
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Greg Stewart when describing his setup in a very recent post at the Ref-D thread also pointed to a universal over-damping Zobel against transformer ringing that he uses on all his secondaries as it was suggested by John Swenson there:
Swenson's post in Audiophile Style forum (Dec 2013)
I thought that some of you who had asked about suggestions on Cx Cs Rs values when not having a Quasimodo tester to define them, you may find that interesting. Its simply about installing 22nF Cs 330R Rs compensation for any transformer type. I don't know, maybe it does worth the easy try since I included such positions on the UBiB boards anyway. See if it promotes your kind of sound or not. The Cx cap's position must be left blank in this case.
Swenson's post in Audiophile Style forum (Dec 2013)
I thought that some of you who had asked about suggestions on Cx Cs Rs values when not having a Quasimodo tester to define them, you may find that interesting. Its simply about installing 22nF Cs 330R Rs compensation for any transformer type. I don't know, maybe it does worth the easy try since I included such positions on the UBiB boards anyway. See if it promotes your kind of sound or not. The Cx cap's position must be left blank in this case.
Rf is not part of this, comes later in the circuit and creates a mild filter with C1 for rectifiers noise. You may prefer it to a wire link or not regardless.
A quick look in Mouser shows Wima MKP10 0.022uF 250VAC 4x9x13mm of 10mm pitch stocked: 505-MKP1G022203C00KS. Maybe overkill, you could go MKT 5mm pitch 100 Volt AC and still do the job basically, the PCB hosts both sizes, but I know you guys usually go for the bigger stronger better one anyways
I see they got KOA Speer SPR2* 12mm 2W carbon film in 330 Ohm as well: 660-SPR2CT521R331J
*Also known in the boutique parts world as Kiwame
A quick look in Mouser shows Wima MKP10 0.022uF 250VAC 4x9x13mm of 10mm pitch stocked: 505-MKP1G022203C00KS. Maybe overkill, you could go MKT 5mm pitch 100 Volt AC and still do the job basically, the PCB hosts both sizes, but I know you guys usually go for the bigger stronger better one anyways
I see they got KOA Speer SPR2* 12mm 2W carbon film in 330 Ohm as well: 660-SPR2CT521R331J
*Also known in the boutique parts world as Kiwame
you are using ultra BIB to power supply op amps and analogue power supplys for AK4497?
and for digital part - Reflecor D as pre regulator?
and for digital part - Reflecor D as pre regulator?
Soundwise I like it much better than LT3045 that used for this purpose. Changes are noticable no so much on the base but rather on trebble, which become more clear.
Chimneys have the hole at the botton on pcb and also in the chassis to allow free airflow.
Another Ultra Bib is powering ak4497 VDD L/R @ 5V directly and one Reflector-D running @5V is powering local LDOs: DVDD + Clocks + Fifo + Digital Isolator 3.3V, DVDD Core 1.8V, AVDD 3.3V. USB Xmos is powered by LT3045 on dirty isolated side.
