DIY 自作派同好同學會 |
<   >   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
 
*** ﹝請按主旨作出回應﹞ ***
主旨寄件者更新日期
回覆 (833): DIY Pre amplifiers in Sai Kung
Gingers
09-12-06
07:23:29
回覆 (832): DIY Pre amplifiers in Sai Kung
 
I was told a small animal is living inside this house :-)  
 
 
 
Gingers
09-12-06
07:14:30
回覆 (831): DIY Pre amplifiers in Sai Kung
Gingers
09-12-06
07:12:34
回覆 (830): DIY Pre amplifiers in Sai Kung
Gingers
09-12-06
07:11:21
回覆 (829): DIY Pre amplifiers in Sai Kung
 
Routine shooting but I enjoyed it :-)  
 
Gingers
09-12-06
07:10:11
回覆 (828): DIY Pre amplifiers in Sai Kung
 
Yumcha + Photo taking + Audition + BBQ Party  
--------------------------------------------------------  
 
Thanks to limage & Margaret for their warmest hospitality and both 8Po & Anthony who brought along their DIY pre amplifiers for an audition!!!  
 
I enjoyed each minutes yesterday :-)  
 
 
 
 
Gingers
09-12-06
07:03:00
回覆 (865): 家訪 (四)
今回是被家訪。  
 
今天心情異常興奮,除了幾位音響前輩到訪寒舍之餘,另一位網友 Mahler 主動聯絡小弟並帶來新購得的 PrismSound Orpheus dac 一起樂樂!  
 
Photobucket  
 
Prism 音效有保證,功能之豐富更是我料不到的…如內置黑膠唱放(待證實)、耳機放大等等。推 AKG271 桌桌有餘,駁傳統 CDT 播 CD 與手上的 dCS 平起平坐。聽電腦 media 同樣出色。遺憾時間關系未能試盡所有設定…  
 
Anyway, 這個價位交足貨,十分羨慕機主呢!他日接上 Lohengramm/ackcheng 既原子鐘肯定更加過癮!  
Vash
09-12-03
18:23:55
回覆 (864): Limage for your eyes.
Anyone tried Ubyte-2 speaker cable before?
ackcheng
09-12-02
14:02:13
回覆 (863): Limage for your eyes.
That looks simple and effective enough. What is left is to make the end pins like these to facilitate soldering onto PCBs.  
---------  
tube sockets are mostly either spirng type or fork type. both relying on the resilience of the metal to retain the tube pin. so if you are looking for strong gripping sockets, you need strong resilent type. of course it means you need some force to insert into them. for chassis mount, it is probably o.k. it is probably not good for old tubes with fragile base. but for pcb mount, it is rather probelmatic as you are well aware of.  
if you think what you shown is good('strong') enough for you, you can get someone to machine the pins down so that they can fit into your pcb.  
 
i need some thing to work for pcb. so i'm looking for a zero force insertion type.
drwkng
09-11-22
16:32:59
回覆 (862): Limage for your eyes.
 
Dr. King,  
 
That looks simple and effective enough. What is left is to make the end pins like these to facilitate soldering onto PCBs.  
 
Long pins  
limage
09-11-22
08:44:03
回覆 (861): Limage for your eyes.
Great stuff. Well done King!
Derek2A3
09-11-21
08:30:15
回覆 (860): Limage for your eyes.
I am curious to know is it something prototype material for your new design ?  
------------  
this is a prototype of a new 8 pin tube socket. hopefully a zero insertion tube socket.
drwkng
09-11-20
23:44:53
回覆 (859): Limage for your eyes.
I am curious to know is it something prototype material for your new design ?
Vash
09-11-20
23:42:04
回覆 (858): Limage for your eyes.
Photobucket  
 
Photobucket  
 
Photobucket  
drwkng
09-11-20
23:38:06
回覆 (857): de-soldering
i've 3 desoldering gun, 2 chinese and one japanese. the hakko when it works, is very good. the chinese are hit and miss. those plastic suckers are not that good for pcb work since the nozzzle is too big to get a precise positioning. for quick fix, i use solder wicks most of the time.
drwkng
09-11-20
23:24:47
回覆 (856): de-soldering
Besides, any advice from King ? He should has well experience on this.  
 
Vash
09-11-20
16:34:59
回覆 (855): de-soldering
Popeye,  
 
I use some pro. version of de-soldering workstation in my company. The only draw back as said in my previous message. For a freelance diyer or home usage, I think this Soldapullt is enough.  
 
^___^
Vash
09-11-20
16:33:34
回覆 (854): de-soldering
Vash  
 
 
Compered with Limage's de-soldering gun, it's a Kids tool .
Popeye
09-11-20
16:31:52
回覆 (854): de-soldering
Oh....to maintain a good condition of this sucking device, it needs to 'shit' right after every 'stroke' .  
 
For me, I use this for almost 10 years and still maintain in very great condition. Tip replacement only took place once.
Vash
09-11-20
16:31:51
回覆 (853): de-soldering
 
Oh yes, I tried one that looked very similar at Colin's place. It was fairly long indeed!  
 
limage
09-11-20
16:14:57
回覆 (852): de-soldering
And, just checked this Soldapullt made in US, not Japan.
Vash
09-11-20
15:43:00
回覆 (851): de-soldering
>>>Portable suction tools do not work as effectively because they may not leave tidy holes for the new inserts.  
 
Dear sir, did you ever try the big one ? The one I use as shown below.
Vash
09-11-20
15:41:46
回覆 (849): de-soldering
 
my farvoite tool is a Japanese made cheap portable one for home usage  
_____________________________________  
 
Portable suction tools do not work as effectively because they may not leave tidy holes for the new inserts.  
 
limage
09-11-20
14:40:55
回覆 (850): 家訪 (三)
typo......老闆試用 dact 一套西裝配 Leak 推 3/5A
Vash
09-11-20
12:28:02
回覆 (849): 家訪 (三)
讓 hinhin 等了數個月,昨日夾好時間一圓老闆試用 dact 一套西裝配 Leak 推 2/5A  
 
Photobucket  
 
剛好碰上相片兄新作 diy Pass Xono 巡回測試,這可是一個有誠意既製作,可發展潛力無限。現在尚欠最後微調,期待!  
 
Photobucket  
 
Project 旗艦 TT 非常抵買,配dact 表現穩陣,老闆收貨並決定下單要一部。  
 
Photobucket  
 
小弟愚見如下…  
 
- 老闆哩個場浪費了 LS3/5a, 或  
- 老闆玩 LS3/5a 浪費了個場  
 
見議換上一對屏風…^__^  
 
 
 
Vash
09-11-20
12:23:30
回覆 (848): de-soldering
Back to the years working in the electronics workshop, we already use independent de-soldering w/s. It is an effective tools for fast and multiple soldering joints but the cleaning of sucking tips is terrible... my farvoite tool is a Japanese made cheap portable one for home usage. It serves me for almost ten years already.
Vash
09-11-20
12:10:22
回覆 (847): de-soldering
 
This de-soldering gun comes handy when working on tube sockets or the like with multi soldering points..........  
 
Photobucket  
 
Better still, putting the soldering iron and de-soldering gun together in one compact station would be even more desirable and certainly makes life easier for all electronic technicians. I used to find such combined stations widely available at Apliu Street years ago, but it seems they are no longer available at present.  
 
A search through the internet reveals that these stations of yester-years have long become obsolete. What they have now are separate de-soldering tools of various digital designs for the multi-layer PC boards at substantially higher prices.  
 
When we need to work on simpler PC boards, where shall we turn to then?  
 
limage
09-11-20
11:45:07
回覆 (846): 家訪 (二)
放心,我會好好對待哩對 1.6。  
 
^__^  
 
Vash
09-11-13
14:30:27
回覆 (845): 家訪 (二)
 
 
 
音效無理由差過我屋企  
____________________  
 
 
It may be necessary to remind big Maggie users that this front-to-back placement, having the mid-range up front while the bass panels a few feet behind, is an essentially compromise arrangement, necessitated by the fact that the width of the room does not allow a full array of in-line placement. This method has been recommended by Magnepan to cater for those loyal users who otherwise have to turn to other brands.  
 
A compromise is, however, a compromise at best. It means you will not be getting the very best the big Maggies are capable of. The reason is simple: since all panels are dipolar in nature, there is simply no way by which one could remotely achieve true phase coherence in a situation flooded with complex phase disturbances.  
 
Reasonably good results, however, are possible through meticulous attention to frequency matching, particularly over the midband where the two drivers cross over each other. By so doing, the vital mid-range may at least come forth unscathed. The rest of the frequency range, I am afraid, has to be given up to chance.  
 
 
limage
09-11-13
13:01:57
回覆 (844): 家訪 (二)
昨日一次過遇上三位音響前輩…  
 
第一個是梁先生,活躍於八十年代時常與鄺大俠等人到"康樂園"聽定位李既極品音響。最近他希望投入屏風懷抱並向瑪姬 1.6 打主意,遂主動在下午到寒舍探聽家居屏風的表現,亦正好見證了家中 1.6 復修後的表現。  
 
傍晚連同幾位 diyers 走訪了另一位前輩,沙田麥。還有另一位屏風專家之一的余師父。  
 
Photobucket  
 
沙田麥大家都認識,其出入器材及屏風擺位偶有更新。今次見其低音 panel ( below 90Hz )平放後面和之前的分層排隊法有別。  
 
Photobucket  
 
器材好穩陣,有國內名牌 CDP,Ensemble phono, Audio Note 前+CJ8 mono 後推全頻 3.6,用膽分音配Goldmund 及 AudioNote 膽後推低音屏風。  
 
初聽打了過突,音效無理由差過我屋企…相信是工廠大廈的電源問題影響了表現。決定外出食個晚飯後再續。  
 
Photobucket  
 
晚上九時左右回來再聽,對了!沙田麥一路按余師父指示作微調,余師父則開心地講故仔,過癮!入夜後的聲音真好,聽完另我更愛家中的瑪姬,更想為姖換過一間更大既屋…(發夢矣)。
Vash
09-11-13
03:25:09
回覆 (843): html code
Not sure Tony know it or not.  
 
^__^  
Vash
09-11-12
13:38:09
回覆 (842): html code
Very useful, Vash ! Excellent.  
 
PS : does tony88 know about this ?
evp1312
09-11-12
13:08:01
回覆 (841): html code
 
Get it Vash, many thanks.  
 
Don't know that PR1 is able to support HTML. It should make posting easier then!  
 
limage
09-11-11
10:54:03
回覆 (840): html code
Dear limage,  
 
There is a 'html code', you can find it at your photobucket foto page. They provide you four type of foto link, one namely 'html code'. Just copy and paste the link on the message dialogue box as shown below will work.
Vash
09-11-10
21:04:58
回覆 (839): Volume pot
 
Vash,  
 
How did you manage to put in a few pictures within ONE posting?  
 
That's brilliant!  
 
 
 
limage
09-11-10
18:34:59
回覆 (838): Volume pot
很久也沒有外出,適逢學兄,laipanda 既新作 807 後級調較完成,順理成章與 hinhin 做一過家訪。  
 
Photobucket  
 
學兄家中呈正方形,器材用傳統的擺位方法,hinhin 一坐下便很快找到皇帝位。  
 
Photobucket  
 
CD 機是北歐的 North Star 旗艦型號,前後級當然是學兄自家廠牌既出品再配上德國 ADAM 書架型喇叭。  
 
Photobucket  
 
前級表現十分中性,和前作用 6922 的膽前級是另一種感覺。用了珍藏靚靚輸出牛的後級在低音量下仍可以令 ADAM 推得貼貼服服、充滿彈跳力…與我多年前擁有的 Dynaudio Acoustics LS5/12a "綠龜"表現相約。ADAM 雖然是鑑聽品牌,聽鄧麗君仍然韻味十足呢。  
 
Photobucket  
 
無敵嗎?不是,聽慣了屏風的我很喜歡有線條的低音。ADAM 在這個環節裡相信要再花多些心思、擺番個靚位、來一個"終極室交連"了。  
 
Photobucket  
 
很期待到學兄新裝修的試音室再聽這部潛力無窮的 507 推座地大喇叭…當然更希望可以有機會用這部精品膽後夾一夾家中的瑪姬啦。  
 
Photobucket
Vash
09-11-10
10:15:04
回覆 (837): Volume pot
Thanks for the insight King!  
CFT
09-11-09
23:26:25
回覆 (836): Volume pot
What about this step attenuator with vishay smd resistors? Any one has the experience : )  
-----  
it is just a cheap switch with smd resistor. the name vishay does not mean much since vishay has so many resistors ranging from being crap to being excellent.
drwkng
09-11-09
01:41:22
回覆 (835): Volume pot
What about this step attenuator with vishay smd resistors? Any one has the experience : )  
 
http://cgi.ebay.com/Valab-23-Step-Attenuator-Potentiometer-250K-Stereo-Log_W0QQitemZ270471623101QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3ef95d71bd
CFT
09-11-09
00:53:17
回覆 (834): Volume pot
one more thought on the digital volume control. while it is o.k. as a volume pot but it does not mean the source can drive the power amps. it is still a mystery to me that a preamp can make that much difference.
drwkng
09-11-01
13:46:20