// TDA1541A PCB already

[tube-lover]

dear anthony,

do U collect the kits already?
I change the post office which use the tracking & email to him already.

They answer me was the parcel was on canada already.
Now is on canada's custom.
I think U will collect it today. I will compliant to post office hong kong because I was post By EMS. The new zealand was collect already & canada cost much more time. This is not EMS service!!!!

For my point. I suggest 250~0~250.
But your power transformer 210~0~210.
There may be some resisters need change.
pls give me one day. I need to test.

pls see the winding that I suggest in my power transformer.


thanks

thomas

[Coulomb]

Originally posted by tube-lover
dear anthony,

do U collect the kits already?
I change the post office which use the tracking & email to him already.

They answer me was the parcel was on canada already.
Now is on canada's custom.
I think U will collect it today. I will compliant to post office hong kong because I was post By EMS. The new zealand was collect already & canada cost much more time. This is not EMS service!!!!

For my point. I suggest 250~0~250.
But your power transformer 210~0~210.
There may be some resisters need change.
pls give me one day. I need to test.

pls see the winding that I suggest in my power transformer.


thanks

thomas

Hello Thomas, today is Sunday here and tomorrow is a Holiday. I will likely not get my parcel until Tuesday or Wednesday.

Regards

Anthony

[tube-lover]

For dear Tim pattinson,

For your questions, pls study.

No need rework in 6c45pi pin. Only 6x4 & 6dj8.

Voltage doubler is ok, but double confirm the filament
volt is 6.3V after plug in the tubes. (two dummy
testing pads provided to measure filament voltage).

Buffer gain is not so high since we've using
2xTDA1541A,and the total gain should be ok for normal
use.

For dear Anthony,

About your questions, pls check email.


thanks

thomas

[tube-lover]

Dear all,

small modification for my kit for update.

Some Old CD machine had this problem.

If cannot lock the CD drive, pls make below
changes,

(1)Remove DAC trasformer T1
(2)Add 2x0u1 cap to T1
(3) short C79
(4) short C44

Second is special for Hong Kong DIYers.

If U like to hear my DAC.

pls go to

Wing Ming Audio & Video Centre. ( This Company was Airtight tube amp in Hong Kong)

G/F, NO.77 Sai Yee St.
Mong Kok, Kowloon.


Pls directly upstair to to the the upper floor( show Room) to
hear combine with Airtight ATM-1,ATM-300(300B SE)& flatship 211SE.

call them inform shop manager Eric Sit

I hope can received more advise of my DAC to get improvement.


thanks

thomas

[Strohmie]

Originally posted by tube-lover
(1)Remove DAC trasformer T1
(2)Add 2x0u1 cap to T1
(3) short C79
(4) short C44

Is this what you mean? (see attachment)

[tube-lover]

hi Strohmie,

U right. But this is only for some of the CD drive.
If your CD drive can log by the DAC, forget about it.


For Hong Kong Diyer, if U like to hear the performance of my standard kit.

pls go to-------

Wing Ming Audio & Video Centre.

G/F, NO.77 Sai Yee St.
Mong Kok, Kowloon.

Pls call them directly upstair to to the the upper floor( show Room) to
hear combine with Airtightm ATM-1,ATM-300(300B SE)& flatship 211SE.

call them inform shop manager Eric Sit that U are thomas friend is OK.

thanks

thomas

[tube-lover]

HI all,

now my DAC was testing with this amp & speakers.

thanks

thomas

[Coulomb]

Originally posted by tube-lover
HI all,

now my DAC was testing with this amp & speakers.

thanks

thomas

Cool!

[nl]

I got my kit from Thomas and started putting it together today. This is about the most beautiful PCB I've ever seen. You get a lot for your money--a ton of parts. The DAC board alone has ten voltage regulators.

[tube-lover]

Dear nl,

thanks for your comment.

I need amend some of the data which missing in the construction menu.

For thr tube PCB Board.

Pls see the reference voltage,

(1) Using 6C45

Voltage across C5=270V
Voltage across C3 or C43=210V
Voltage across 6C45 plate to GND (pin7 & GND)=80V


(2)Using 6DJ8

Voltage across C5=270V
Voltage across C3 or C43=200V


thanks

thomas