影音天地主旨 ﹝請按主旨作出回應﹞  下頁  尾頁 寄件者 傳送日期 由舊至新 由新至舊
[#1] Sunaudio 2A3    
Any big brothers can me the price for new one?
Thanks
chrisham
個人訊息 會員
203.xxx.xxx.207
2007-06-15 23:12
[#2] Sunaudio 2A3    
HK$8K.
fs68alan-
個人訊息 會員
221.xxx.xxx.8
2007-06-15 23:40
[#3] Sunaudio 2A3    
Thanks
Kit or finished set
Thanks again
chrisham
個人訊息 會員
203.xxx.xxx.207
2007-06-15 23:44
[#4] Sunaudio 2A3    
any commend on this brand?
Thanks
matball
個人訊息 會員
167.xxx.xxx.10
2007-06-16 12:16
[#5] Sunaudio 2A3    
I am interested in this too
projim
個人訊息 會員
202.xxx.xxx.43
2008-01-07 16:47
[#6] Sunaudio 2A3    
HK distributor sell $10800 assembly product.
ck2007
個人訊息 會員
203.xxx.xxx.153
2008-01-07 16:56
[#7] Sunaudio 2A3    
HK distributor sell $10800 assembly product.


Assembly product is made in Japan or Hong Kong??
projim
個人訊息 會員
202.xxx.xxx.41
2008-01-29 09:05
[#8] Sunaudio 2A3    
i think they're "made in hong kong"
aliu
個人訊息 正式會員
203.xxx.xxx.88
2008-01-29 09:32
[#9] Sunaudio 2A3    
u mean assembly in hong kong!
tubediyer
個人訊息 會員
116.xxx.xxx.15
2008-01-29 09:36
[#10] Sunaudio 2A3    
i think so...
aliu
個人訊息 正式會員
203.xxx.xxx.88
2008-01-29 10:26
[#11] Sunaudio 2A3    
Any brother know how to change the setting from use 2a3 to 45 tubes or others tubes.
hp
個人訊息 會員
218.xxx.xxx.107
2008-05-11 02:09
[#12] Sunaudio 2A3    
the cheapest price last yr in Reference Audio at around 6.5k for kits.

2nd hand price around 7-7.5k.
relax173
個人訊息 會員
58.xxx.xxx.148
2008-05-11 13:29
[#13] Sunaudio 2A3    
>Any brother know how to change the setting from use 2a3 to 45 tubes or others tubes.

Very simple. Just change the two big cathode resistors from 750 ohms to 1.5K and connect your speakers to the 4 ohm output tapping.

If you want even better performance, you can get the output transformer for the Sun VT25 amp from Mr. Chan of Reference Audio or get the Nano amorphous cow from diythomas. Both of them have 5K primary tapping for 45 tube.
F2aYeung
個人訊息 會員
219.xxx.xxx.98
2008-05-11 15:11
[#14] Sunaudio 2A3    
Fyi, the Nano Amorphous cow has 3K and 5K tapping.
You can use it for 300B,45,2A3,PX25,PX4,RE604...
F2aYeung
個人訊息 會員
219.xxx.xxx.98
2008-05-11 15:12
[#15] Sunaudio 2A3    
Thanks, F2aYeung
hp
個人訊息 會員
58.xxx.xxx.202
2008-05-11 16:26
[#16] Sunaudio 2A3    

Any brother know how to change the setting from use 2a3 to 300B tubes or others tubes.Thanks!
ngalan9899
個人訊息 正式會員
221.xxx.xxx.133
2008-05-23 02:03
[#17] Sunaudio 2A3    
Any brother know how to change the setting from use 2a3 to 300B tubes or others tubes.Thanks!
ngalan9899
個人訊息 正式會員
221.xxx.xxx.206
2008-05-24 08:36
[#18] Sunaudio 2A3    
sunaudio 2A3 的推動應該是兩級6SN7,推2A3已經吃力,推300B會更不足夠
drcy
個人訊息 會員
59.xxx.xxx.95
2008-05-24 09:03
[#19] Sunaudio 2A3    
Try to study the circuit of 300B & 2A3 from JE Lab. 2 stage 6SN7 can drive 2A3 & 300B.

http://www.angela.com/catalog/how-to/SE.2A3.html

http://www.angela.com/catalog/how-to/300B.SE.html
supera
個人訊息 會員
124.xxx.xxx.137
2008-05-24 23:15
[#20] Sunaudio 2A3    
Basically the circuit of Sun Audio amps is similar to Audio Note UK 300B amps like Quest, Shinri, Baransu except B+ is not as high. If you need more power you can ask Mr Chan of Reference Audio to change the power transformer to other Tamura model for you.

To convert from 2A3 to 300B, the cheapest way is to change the 750 ohms cathode resistor to 1K, connect plate to 3.5K instead of 2.5K tapping and drop the 2 X 6.3V filament voltage to 2 X 5V with two 1.2 ohm resistors.
1derful
個人訊息 會員
220.xxx.xxx.216
2008-05-24 23:34
主旨內容一共有 5 頁,每頁顯示 20 個信息,選擇頁數:  下頁  尾頁
按照傳送日期顯示:由舊至新由舊至新  由新至舊由新至舊
最新資訊 - 影音
支援 8K / 60p、4K / 120p,Marantz 推出全新纖薄環繞聲放大器 NR1711 2020-08-11

最新資訊 - 影音
Sony 發布全新一代無線降噪耳機 WH-1000XM4 2020-08-10

最新資訊 - 影音
丹麥 Densen B-310LE 限量版後級 2020-08-10

最新資訊 - 影音
SONY 互動娛樂 ( SIE ) 發布多項 PS5 周邊配備的詳細資訊 2020-08-09