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Poll..anyone interested in an Aikido linestage PCB group buy?
Poll..anyone interested in an Aikido linestage PCB group buy?
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Old 21st February 2006, 11:09 AM   #611
Tubehead is offline Tubehead  Sweden
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Join Date: Jan 2004
Location: Stockholm
Default Convinced

Bas,

The Aikido I heard is hardwired and using 6189WA (ECC82 type).
Its kind of cramped. I really dont expect to be able to hear a difference to the advantage of hardwired.
If hardwired is done improperly, as for example getting components too close, it could be worse than a good PCB layout.

My line stage so far has been the BUF03 unity gain op amp video buffer running at 2 x 17V.
No gain stage, no input or output capacitor, very simple, very transparent... or at least I thought so...

Compared with the BUF03 the Aikido has better dynamics, even higher resolution and more open sound.

The BUF03 seem, in comparision with Aikido, having some kind of trouble with transients, maybe its a unity gain - feedback problem.
It is really good, but the Aikido is on the next level.
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Old 21st February 2006, 11:12 AM   #612
Bas Horneman is offline Bas Horneman  Netherlands
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Thanks for your views Tubehead.
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Old 21st February 2006, 04:47 PM   #613
SteveA is offline SteveA  United States
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Quote:
Originally posted by Bas Horneman
Boards should arrive in the next week or two in the Netherlands.

Are you ready for payment yet? Same price as previous orders?
Thanks,
SteveA
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Old 21st February 2006, 04:49 PM   #614
Bas Horneman is offline Bas Horneman  Netherlands
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Quote:
Are you ready for payment yet? Same price as previous orders?
Yep and yep.
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Old 21st February 2006, 10:34 PM   #615
Alastair E is offline Alastair E  Wales
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Default Any spare boards available?

Bas,
Guess you have sold all your current batch of boards?

I was interested in the 'Octal' version, if you have any still available..

Will I need two for stereo or are two channels on one board?

Regards,

Alastair
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Old 21st February 2006, 10:39 PM   #616
Bas Horneman is offline Bas Horneman  Netherlands
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Quote:
Guess you have sold all your current batch of boards?
Nope still counting the amount needed. So you can still give up an order.

Quote:
Will I need two for stereo or are two channels on one board?
I'm afraid so. The board is for one channel only.
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Old 21st February 2006, 10:49 PM   #617
Bas Horneman is offline Bas Horneman  Netherlands
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Payments will now be accepted via Paypal.
Please if a member of diyaudio..and you have given up your name in the list below...mention your username as well...

bas.horneman-at-gmail.com

replace the -at- with @

PSU boards 9.00 US$
Octal 9.50US$
Noval 9.50 US$
Adapter boards 2.75$

NB. The adapter boards only "work" with the octal boards.

Shipping <= 4 boards 3.50US$
Shipping > 4 and <= 8 boards 5US$


Please remember to mention type of board..i.e. octal, noval and psu.


No Checques unfortunately. It costs 17 dollars for a 30dollar check. Bank payments will also be accepted. Please mail for my banking details if you wish.

Regards,
Bas


Interest for octal boards
burnedfingers : 4
harwoodsparks : 4
hifryer : 2
bst : 8
2wo : 2
macktube : 2
maxdd_nj : 2
CaliforniaBob : 2
SteveA : 4
DaveInVA : 4

Via E-mail : 20

Total octal : 54
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

9 pin boards

bst : 8
hifryer : 2
Andypairo : 2
Tubehead : 6
Via E-mail : 6

Total 9 pin : 24
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

PSU boards

2wo : 1
harwoodsparks : 2
macktube : 1
maxdd_nj : 1
CaliforniaBob : 2
hifryer : 2
SteveA : 2
Andypairo : 2
bst : 4
Tubehead : 3

via email : 5


Total PSU : 23
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Adapter boards 9pin

Via email: 2

Total: 2

-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
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Old 22nd February 2006, 04:32 PM   #618
JuanLu is offline JuanLu  Spain
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Hi all,

Just finished my Aikido and I'm very happy with the sound but I can't use it with my Hedlund horns: too much gain (way too much...). I have in first pos the 6922 and in second the 5687 and only can use less than 1/10 of the 50k pot. Can I use a 20k pot or 10K? (tube newbie attack)
The Aikido is silent but not as silent I was expecting. Actually I had here a trafo with secondaries 250-0, 6.3-0 and without ct in the 6.3, so I arranged a pair of 100R to the 6.3-0 and the center to the heather bias on the PSU board. The AC goes to each channel board.
For the 6x5 heather I had no 6.3 trafo in hand, so I did a little regulated psu with a LM317 and here comes the second question: have I to connect here another virtual CT to the heather bias?

Thanks for your advice!

JL
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Old 22nd February 2006, 04:36 PM   #619
Bas Horneman is offline Bas Horneman  Netherlands
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Quote:
Just finished my Aikido and I'm very happy with the sound but I can't use it with my Hedlund horns: too much gain (way too much...).
That is a common problem. Too much gain. You might want try a different first tube (5687 or 6H30). (But would have to change your resistive noise divider)


Quote:
have I to connect here another virtual CT to the heather bias?
You don't have to connect your rectifier virtual CT to the heater bias. Because there is not heater/cathode insulation problem.

Quote:
Can I use a 20k pot or 10K?
Yes. You can, should be no problem.
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Old 22nd February 2006, 04:43 PM   #620
Bas Horneman is offline Bas Horneman  Netherlands
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Quote:
The Aikido is silent but not as silent I was expecting.
You might want to use DC on the filaments.
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