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OLD THREAD Hi-end phono preamplifier by Andrea Ciuffoli

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#125
1. apelizzo x 1 #Paid quanghao168@yahoo.com.vn USD66 11/05/2010
2. gioz
3. toufu
4. pred
5. anilva
6. guglielmope x 1
7. wushuliu
8. John Caswell x 2
9. Tangmonster x 2 #Paid quanghao168@yahoo.com.vn USD132 18/05/2010
10. khaho
11. Webby
12. bbe
13. audiodesignguide
14. le´flu x 5
15. vgeorge x1
16. habsrock93 x1
17. eeyore x1
18. Torsken
19. booangler 2
20. vanofmonks 1
21. Loboone x 1
22. Pilsern x2
23. 3GGG x1
24. Presbel x 1
25. Exurbia x 4
26. sfrench x1
27. klaju1955 x 2
28. deej49 x 3
29. jormajj
30. alex49 x 3
31. johngalt47 x 2
 
#127
Hi Quanghao,

Can we please have an updated list so those that have paid know you have received payment.

Then can you update as to where you are with regards order od boards and expected delivery to you.

Then I will be much more happy (along with rest on the list) that this is going to happen.

I then can start getting other parts together also. (Valves etc)

Regards

LOBOONE
 
#128
yes, i can updat later
Now im making PCB and this is size PCB
Thank you all
 

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#131
tangmonster said:
So far this is the cheapest option i have seen. I still have to contact the seller on shipping cost for 4 to 8 units.

NOS NEW Siemens "POST" tube D3a 7721 Pentode - eBay (item 130391572872 end time May-21-10 13:15:00 PDT)

Anybody have cheaper options?
Click to expand...

If you use a socket adapter 9pin to 9 pin and adapting the setup you could use Russian 6s3p-ev EC86, or 6c45p (to try). 6s3p is very low noise triode. D3a is not the only tube with those characteristics. For this project should be ok because low noise device has first priority. However I tested D3a and 6cxx tubes as two stage single unit driver for 2a3 amplifier and I find the sound pretty unpleasant, sound stage very confused: straight sound due to high transconductance.
 
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#134
tangmonster said:
So far this is the cheapest option i have seen. I still have to contact the seller on shipping cost for 4 to 8 units.

NOS NEW Siemens "POST" tube D3a 7721 Pentode - eBay (item 130391572872 end time May-21-10 13:15:00 PDT)

Anybody have cheaper options?
Click to expand...

I´ve bought there, I think he has the best prices for this tubes, buying together with other tubes, he made till a good discount.
Who want´s to deal direct with him, here is his mail: info@audiotubes.de, his name is Heinz.
He also have good connections to good old German tubes like TFK...

Klaus
 
#140
Second question IRF9160 , anybody have a supplier/equivalent for these ,it seems they are hard for me to find.


WAIT! I think i see now , It should be IRF9610 and NOT IRF9160

We\I need a decent parts list page with designators.

and possibly a once over to look for mistakes like this 🙂
 
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