BIII with Broskie Unbalancer vs. EE Minimax Plus - My experience - Page 9 - diyAudio
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Old 27th September 2013, 08:13 AM   #81
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Doubt it - they're good quality. Low current passing through, so I really doubt you'd notice any difference.

I've changed the output caps to 10uF Obbligato MKP. Seem decent enough, and it allows me to use any power amp.
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Old 15th October 2013, 06:35 AM   #82
kvardas is offline kvardas  United States
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Well, in addition to the neohm 50R resistors in the I/V positions, I upgraded about 12 other resistors with a nice quality resistor. I also replaced the coupling caps with Duelund Cu PIO 1 uF coupling caps, which on purchased on sale from Parts Connexion.

I am very pleased with the end result.
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Old 15th October 2013, 12:03 PM   #83
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Wow! Beautiful job! What are those tubes - RCA clear tops?

I was playing around with my tubes recently and found a nice combination: Toshiba Hi-S 5963 as input tubes, and Raytheon 12AT7 output tubes. Very clinical sound! 300R MK132 cathode resistors.
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Old 16th October 2013, 06:26 AM   #84
kvardas is offline kvardas  United States
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The tubes are 12AU7A. There made it the US and have a splotch of gray on the side. I am not sure if they are "cleartops". I got them for a buck a piece.
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Old 21st October 2013, 07:42 PM   #85
Ryssen is offline Ryssen  Sweden
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I bought a pcb from Broskie does anyone know what R18,R19 and C19 is for?
If they should be used?
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Old 22nd October 2013, 03:37 PM   #86
Ryssen is offline Ryssen  Sweden
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I found out they are for bisaing the heaters .
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Old 25th January 2014, 04:30 PM   #87
zz1969 is offline zz1969  Russian Federation
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Quote:
Originally Posted by Ryssen View Post
I bought a pcb from Broskie does anyone know what R18,R19 and C19 is for?
If they should be used?
What cap and resistors did you use at these slots, Ryssen?
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Old 26th January 2014, 04:12 AM   #88
zz1969 is offline zz1969  Russian Federation
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I found out. It depends. And this info is in Aikido manual.
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Old 8th April 2014, 02:04 AM   #89
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If anyone is still experimenting with the Unbalancer circuit, I thought I'd post a link to this thread as Ian/Ruffrecords has found a circuit error on the original Unbalancer PCB (the PCB which has the PSU included).

Grid resistors -> GND
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Old 30th August 2014, 12:45 AM   #90
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Hello everybody, i'm really excited reading this thread, i can't stand in my shoes waiting to build my B III + Unbalancer DAC!
But i'm 1/2 steps behind you and stuck deeply in finding out how to assemble an Unbalancer even starting from Glass-ware PCB...
Could someone please suggest me all R and C values for an I/V stage Unbalancer for a B IIIse DAC?
I would use JJ ECC802 input and EH 6CG7 output tubes and 2.2/3uF C3 (too much?); a Janus Shunt Regulator to power B+ and Heaters, set to 250/260V and 12.6V.
Just to state one of my problems, i can't figure out R12 correct value to achieve this as i'm not able to quantify the current flow on it. How can i calulate current flow in the Unbalancer?
Thanks to anybody will be so kind to help me!
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