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Old 26th June 2010, 02:54 AM   #1
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Default Hi-end phono preamplifier

Hi all!
This toppic about Hi-end phono preamplifier, you can se all PCB and information!
Phono-End - HQaudiodesign

Hi-end phono preamplifier
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Old 27th June 2010, 09:06 AM   #2
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Well I can work, Sorry you had to wait long!
Quanghao
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Old 28th June 2010, 08:54 AM   #3
jormajj is offline jormajj  Finland
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Hi Quanghao,
the PCB s arrived today, thanks
best regards jormajj
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Old 28th June 2010, 10:29 AM   #4
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Quote:
Originally Posted by jormajj View Post
Hi Quanghao,
the PCB s arrived today, thanks
best regards jormajj
Yes! good!
And some image of Phono -hi end
Attached Images
File Type: jpg Phono-hi-end-1.jpg (349.3 KB, 1040 views)
File Type: jpg Phono-hi-end-2.jpg (160.4 KB, 972 views)
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Old 28th June 2010, 03:10 PM   #5
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SSHV for phono D3A
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File Type: jpg SSHV-for-phono-1.jpg (417.4 KB, 929 views)
File Type: jpg SSHV-for-phono-2.jpg (262.7 KB, 903 views)
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Old 30th June 2010, 12:30 AM   #6
toufu is offline toufu  United States
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Quanghao, do we need center tap transformer? What size?
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Old 30th June 2010, 01:26 AM   #7
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Quote:
Originally Posted by toufu View Post
Quanghao, do we need center tap transformer? What size?
Hi no need center tap. if you have center tap you can use it!

Transformer for Phono-Hi end:
In put: 110 or 220V

out-put: HV= 0-200 V/100mA, or 200 -0-200V. ore 0-200-220 V is is ok
7-9V/ 2-3A for filament D3A
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Old 30th June 2010, 03:06 AM   #8
toufu is offline toufu  United States
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Ok.. Thanks!
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Old 30th June 2010, 03:37 AM   #9
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Quote:
Originally Posted by toufu View Post
Ok.. Thanks!
Note:
1. Heatsink for IRF9610 and 840
20W x 2 on board

Digi-Key - HS385-ND (Manufacturer - 530001B02500G)

2. Heatsink for Filament
10W x 1
Digi-Key - HS350-ND (Manufacturer - 529802B02500G)
Attached Images
File Type: jpg Heatsink-for-IRF9610-and-84.jpg (204.4 KB, 808 views)
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