Sonic frontiers SFC-1 真空管綜合擴大機

 Sonic frontiers SFC-1 真空管綜合擴大機

最近新購入的 Sonic frontiers SFC-1 真空管綜合擴大機

KT88/EL34/KT90/KT99均可以用 可自行調偏壓，享受換不同型號管子的樂趣 size: W48cm D43cm H19cm  weight:27KG

會找這台是因為看了陳寧的介照才知道這台機器這麼經典。而且還可以換不同管子玩。

見到高雄有一台出售，特別請大學長幫忙去cchsu拿了回來。真的十分感謝。音色十分優美，影片跟照片都是大學長拍的，拍的真是不錯，這台機器確實是CP比超高的機器，怪不得經常被秒殺。

https://www.youtube.com/watch?v=H2KoKVBfTgU

網路評價如下

http://www.audioreview.com/product/amplification/preamplifiers/sonic-frontiers/sfl-1.html

根據手冊上的使用說明:

(EL34調整到40，6550或KT88調整到50。EL34用50偏流的話會造成問題)

Turn “ON’the amplifier. After approximately 5 seconds you should see an orange glow appearing inside each tube

through the ventilation slots on the amplifier cover. Wait two minutes, then turn the selector switch knob to the far

left position (fully counterclockwise). Now insert a flat bladed screwdriver into the LV4 bias control slot and slowly

rotate the control clockwise while observing the back panel bias meter. Adjust the control until the meter pointer

reads ‘40’ (the red line) on the meter scale. Now rotate the selector knob clockwise to the next position (LV3)

bias control for a “40” reading on the meter. Continue the same procedure for the remaining two output tubes, rotating

the control clockwise. When you have adjusted all four tubes to the ‘40” position, return the selector knob to

the middle “12 o’clock” position (the indicator mark on the knob should be pointing straight towards the top of the

amp.) The first time you use the amplifier, you should recheck the bias settings on each output tube after about 30

minutes of use (when checking please ensure that there is no signal going through the amp - switch it to MUTE).

Adjust if necessary. We suggest that you check the bias settings every 3 months or so.Your SFC-1 Control Amplifier is now ready for use.

NOTE: The “40” position on the meter scale biases each output tube for maximum sonic performance and

longest tube life. The “50” position can be used, however, if 6550(a), KT88 or KT90IKT99(a) type tubes

are installed. Under no circumstances should the amp be biased at more than “40” when using the

E34L/EL34/6CA7 tube type.