Poll..anyone interested in an Aikido linestage PCB group buy?

[jleaman]

Off the shelf ones are for example :
Lundahl LL1649 or LL1683
Hammond 269AX

How many transformers are needed ? 2 or 1 ?

 

[jleaman]

HAMMOND- 62770 263AX 32 115 60 100-0-100 100 5V @ 2A 1.9 2.44 2.50 1.50 ed .19 X .31 $37.95 $33.40 1
2 HAMMOND- 62771 269AX 40 115 60 125-0-125 100 6.3V @ 2A 2.2 2.50 2.63 1.75 1.44 .19 X .25 $37.16 $32.70 2

 

[Bas Horneman]

How many transformers are needed ? 2 or 1 ?

That all depends on how one likes to build their psu's..some like to have reserve current or full dual mono psu's ..in that case get 2 transformers...

So far I've just used one. And have gone psuedo mono by splitting of after the first rc or lc network and having a seperate rc for each channel.

 

[jleaman]

That all depends on how one likes to build their psu's..some like to have reserve current or full dual mono psu's ..in that case get 2 transformers...

So far I've just used one. And have gone psuedo mono by splitting of after the first rc or lc network and having a seperate rc for each channel.

The 2 transformers that i have pasted here are those the correct valuse ? Ill order 2 : O ) but what one ?

 

[Bas Horneman]

The 2 transformers that i have pasted here are those the correct valuse ? Ill order 2 : O ) but what one ?

I'll have to answer you tomorrow..this is the second night in a row that I've gone to bed 2:30 am...I think I might give you a wrong answer......ok... I'll try anyway..probably can't fall asleep anyway..

I think the 269AX looks suitable with its 125-0-125 you will need to connect the tube rectifier (if you are going to use one) to 125 and 125 (leave 0 disconnected...) to give you around 250VAC (use hybrid graetz bridge to derive a 0) to arrive at around 220DC as suggested by John Broskie. Tune the voltage with the first cap...

Goodnight..

 

[Bas Horneman]

Status update...a first batch of 50 pcb's have been ordered from the pcb supplier

 

[Cambe]

Put me in for two PCB's

 

[Bas Horneman]

By the way...I can't hear a difference when I turn the 25k potentiometer.

 

[jleaman]

I'll have to answer you tomorrow..this is the second night in a row that I've gone to bed 2:30 am...I think I might give you a wrong answer......ok... I'll try anyway..probably can't fall asleep anyway..

I think the 269AX looks suitable with its 125-0-125 you will need to connect the tube rectifier (if you are going to use one) to 125 and 125 (leave 0 disconnected...) to give you around 250VAC (use hybrid graetz bridge to derive a 0) to arrive at around 220DC as suggested by John Broskie. Tune the voltage with the first cap...

Goodnight..

Any more info on the power transofmers ?


When do we pay for the boards ?

 

[Bas Horneman]

http://www.diyaudio.com/forums/showthread.php?postid=710777#post710777

What info do you need?

 

[jleaman]

What info do you need?

What transfomer should i buy. ? I need to buy 2 of them one per channel.

 

[Bas Horneman]

What transfomer should i buy. ? I need to buy 2 of them one per channel.

I think the 269AX looks suitable with its 125-0-125 you will need to connect the tube rectifier (if you are going to use one) to 125 and 125 (leave 0 disconnected...) to give you around 250VAC (use hybrid graetz bridge to derive a 0) to arrive at around 220DC as suggested by John Broskie. Tune the voltage with the first cap...

I just had a search for the 269AX..and it fits the job like a glove.
here is another example of a psu for the Aikido...although the voltage b+ is too high..(you can "dial" in to the right voltage by using a smaller first cap

 

[jacquesF77]

Hi Bas

I'm in for 6 pieces

jacques

 

[jleaman]

what are the prices of boards again ? maybe ill go for 4 Can we pay via pay pal ?

 

[Bas Horneman]

Just a friendly warning for the first time tube amp builders. These voltages can EASILY kill you.

O yeah and before I forget...don't forget a fuse in the primary guys!!

Here are some tips by Doc. B.

http://www.bottlehead.com/loosep/Safety.htm

 

[Bas Horneman]

what are the prices of boards again

9.50US$ per board.

Paypal is the preferred method. I'll post the prices after I have received the first batch.

 

[grataku]

Bas,
thanks for getting me interested in the Aikido, and for the proofing that circuits from tubecad can actually be built and listened to...
I maybe a good idea to be a little more specific and detailed in your description of the PS and all the things needed to get the novice started.
It would be nice to package all the info for the construction.

 

[kmtang]

Let us know the pricing plus shipping and handling.

JOhnny

 

[mllum]

aikido pcb's

Bas,

Please put me down for 2 pcb's as well.

Many Thanks for your efforts

 

[Bas Horneman]

I maybe a good idea to be a little more specific and detailed in your description of the PS and all the things needed to get the novice started.

Ok..will start writing a manual. Tonight...