Bas,
I believe you asked for permission to build the circuit and also sent a % to John. Also, weren't the boards (all boards ) to carry John's name as a condition of use? Clearly, yours is NOT a ripoff.
I believe you asked for permission to build the circuit and also sent a % to John. Also, weren't the boards (all boards ) to carry John's name as a condition of use? Clearly, yours is NOT a ripoff.
Jep..I asked permission, twice, but never received an answer. Then I mailed him how I could transfer the money to him. No answer.
http://www.diyaudio.com/forums/showthread.php?postid=720151#post720151
The funds in the end were (partly) used to cover for the costs of those boards that got lost in the mail, and I donated 100US$ to diyAudio. Everyone who did not get their boards got their boards without having to pay for them again.
http://www.diyaudio.com/forums/showthread.php?postid=720151#post720151
The funds in the end were (partly) used to cover for the costs of those boards that got lost in the mail, and I donated 100US$ to diyAudio. Everyone who did not get their boards got their boards without having to pay for them again.
Bas,
You did everything above board. everything is documented. You made every attempt. Neither yourself or the owners of the DiyAudio website have anything to be ashamed of. Proper recognition was given to John as should be.
You and the people that gave of their time and effort should be given a hearty thank you for a job well done!
Thank You!😀
You did everything above board. everything is documented. You made every attempt. Neither yourself or the owners of the DiyAudio website have anything to be ashamed of. Proper recognition was given to John as should be.
You and the people that gave of their time and effort should be given a hearty thank you for a job well done!
Thank You!😀
Bruce,
I believe that C2's purpose is to filter noise off the B+ but then again I'm not a tube expert. If you look at the schematic that Bas used you will see a .47uf capacitor on the B+ going to a 100K resistor to the grid of the lower triode in the cathode follower and then to a 100K resistor to ground.
The C2 in the schematic will do the same thing. He did add C4 and C6 which weren't a bad idea. The addition of bypass caps for R3 and R5 are questionable in my mind because I would think it could be considered feedback but I'm not sure.
I believe that C2's purpose is to filter noise off the B+ but then again I'm not a tube expert. If you look at the schematic that Bas used you will see a .47uf capacitor on the B+ going to a 100K resistor to the grid of the lower triode in the cathode follower and then to a 100K resistor to ground.
The C2 in the schematic will do the same thing. He did add C4 and C6 which weren't a bad idea. The addition of bypass caps for R3 and R5 are questionable in my mind because I would think it could be considered feedback but I'm not sure.
The board that Bas has is a far superior board.
The German board has the output very close to the B+ and this might result in noise.
The price on the German board looks like it would be around $10.88 per board.
The Bas board is multitubular (LOL) capable of other tubes.
The German board has the output very close to the B+ and this might result in noise.
The price on the German board looks like it would be around $10.88 per board.
The Bas board is multitubular (LOL) capable of other tubes.
Where they with these PCB's? Or was it a hardwired version?
What did you like about it?
Regards,
Bas
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.
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.
Bas Horneman said:
Are you ready for payment yet? Same price as previous orders?
Thanks,
SteveA
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
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
Nope still counting the amount needed. So you can still give up an order.
I'm afraid so. The board is for one channel only.
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
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
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
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
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
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
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)
You don't have to connect your rectifier virtual CT to the heater bias. Because there is not heater/cathode insulation problem.
Yes. You can, should be no problem.