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Old 3rd November 2012, 08:52 PM   #1171
cjkpkg is online now cjkpkg  United States
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OK,

FINALLY have had a chance to finish this pre correctly...sort of...

Running a broskie PS-3 - SS B+ and regulated SS heaters.

B+ is 330
Cathodes see 15V
Kiwame resistors
Silmic cathode cap
Russian 6П6С

All values per schematic

I look forward to giving this some serious listening. I have reverted back hard to the Aikido but this pre now shows promise...I think that it is just as quiet as the aikdio...this is impressive to me.
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Last edited by cjkpkg; 3rd November 2012 at 08:56 PM.
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Old 3rd November 2012, 10:10 PM   #1172
Salas is online now Salas  Greece
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Congratulations. Drop as a note as to what you have learned after some run in.
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Old 5th November 2012, 05:34 PM   #1173
cjkpkg is online now cjkpkg  United States
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Well as it turns out in switching around my sources that when I am using my satellite TV as the source - music channels - I have a faint buzzz. Not like before but there just the same.

Turntable? - no buzzz
Ipod? - no buzzz
Satellite? buzzzzzzzzzzzz

The turntable and the ipod are absolutely dead silent.

So this leads me to addressing the satellite input. Basically i have a homemade cable which runs about 30 feet from where the satellite receiver is to the other room where the amps are. This long run of cable must be the culprit. Step 1 was initiated today in the form of a pair of Edcor matching transformers. As much as I would have like some Jensen iron here I could not justify spending upwards of $200 when the Edcors are $10 each. Certainly worth a try to see if the buzz is tamed at all or for good.

Depending on the result I may splurge for the Jensens.
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Old 5th November 2012, 05:38 PM   #1174
stajo is offline stajo  Sweden
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Quote:
Originally Posted by cjkpkg View Post
Well as it turns out in switching around my sources that when I am using my satellite TV as the source - music channels - I have a faint buzzz. Not like before but there just the same.

Turntable? - no buzzz
Ipod? - no buzzz
Satellite? buzzzzzzzzzzzz

The turntable and the ipod are absolutely dead silent.

So this leads me to addressing the satellite input. Basically i have a homemade cable which runs about 30 feet from where the satellite receiver is to the other room where the amps are. This long run of cable must be the culprit. Step 1 was initiated today in the form of a pair of Edcor matching transformers. As much as I would have like some Jensen iron here I could not justify spending upwards of $200 when the Edcors are $10 each. Certainly worth a try to see if the buzz is tamed at all or for good.

Depending on the result I may splurge for the Jensens.
Try a ground isolator on the tv signal cable.

/Staffan
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Old 27th November 2012, 08:25 PM   #1175
6L6 is offline 6L6  United States
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Hello again!

My project has been on hold awaiting a SSHV2 group buy... It is done, and I have my shunt regulator. Hooray!

Does anybody have any specific information as how to implement it into this 6V6 circuit?

Thanks in advance!
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Old 27th November 2012, 08:28 PM   #1176
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It was a breeze. Well, not really. At first I had my tubes singing, but switched snsing wires to correct palce and worked fine. That was using my home etched PCB and not quality made board. You will love it.
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Old 27th November 2012, 10:42 PM   #1177
6L6 is offline 6L6  United States
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I'm still confused how to set up the regulator... But I'm sure it will be awesome.

Ok, how much heatsink does it need? Can I use the top plate of the chassis or should it have a real heatsink?
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Old 27th November 2012, 11:26 PM   #1178
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It needs a real heatsink, although the transistors used are tough. If you haev the boards, just get the type that is shown in as tall a format as possible. You can build it up a section at a time, testing as you go. PM if you need help. I make really nice smoke
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Old 28th November 2012, 12:00 AM   #1179
6L6 is offline 6L6  United States
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I have stuff on hand, I'm just trying to plan for layout of the preamp chassis. I'm going to make a stand with this design and do it right.
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Old 28th November 2012, 12:05 AM   #1180
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I think biggest heatsink you can get that fits the board profile is 2.5" tall. Wakefield or Ohmite
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