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回覆 (379): Svetlana SV811-3 SE
Summary:  
 
Svetlana 811-3 SE  
Output power: Roughly 15W  
Mains transformer: UTC CG-300  
Faliment transformer: Corvisa toroidal  
Bias transformer: Nuvotem  
Choke: UTC  
Output Transformer: Sowter 6.8k SE  
Circuit: Mu follower  
Driver tube: 6SL7  
Loading tube: 6AG7  
Output tube: Svetlana 811-3  
B+: Roughly 660 dcV  
Caps: BHC, F&T, Wonder Infini Cap and Hovland musicap  
Tube Socket: Johnsons from USA  
Builder: bobui  
 
PPP811-10 and 6C33SE coming real soon!
bobui
13-07-09
11:32:36
回覆 (378): Svetlana SV811-3 SE
Step 5:  
 
Lights On!  
 
Bench test and listening test to come!  
 
bobui
13-07-09
11:21:12
回覆 (377): Svetlana SV811-3 SE
Step 4:  
 
Chassis and all major components in hammered metal finish and ready for correct positioning into the chassis. Final major parts (BHC Caps arrived from the post).  
 
bobui
13-07-09
11:18:52
回覆 (376): Svetlana SV811-3 SE
Step 3:  
 
Get ready for the hammered Metal spray. Must apply a metal primer before the Hammered spray.
bobui
13-07-09
11:14:59
回覆 (375): Svetlana SV811-3 SE
Step 2:  
 
Drilled and time for a clean bath.
bobui
13-07-09
11:11:03
回覆 (374): Svetlana SV811-3 SE
Step 1:  
 
Tailor made Copper chassis ready for drill, punch and cutting
bobui
13-07-09
11:09:08
回覆 (373): Solid wood output transformer cage
>>叧外不如用ebony車快子dok背即  
>>__________________________  
>>咁鬼刁鑽都諗到,服晒你囉!  
 
 
可能會破幾碌,一次過可以同一時間手車幾枝炔子.... :-)  
 
See the 3 blocks in the bottom ? 2 X ebony, 1xBazil rosewood.  
Both are more then 20 years old in my posession. .... How much can I screw them up :-) :-) snap ....  
 
I was told plenty of Brazil rosewood from "Facebook", give me your spec, I can help your retain them. I am shopping this long weekend, Tell me what size you need, I can help & report back what we have and cost ....:-)  
 
Cadiver
13-05-25
13:07:32
回覆 (372): Solid wood output transformer cage
 
 
Is she the one with the sex changed?  
___________________________________  
 
No, I didn't make love with a transsexual..........................in my dreams. That was her uncle/aunt Greg/Gloria Hemingway.  
 
 
 
cpsjj
13-05-24
17:41:43
回覆 (371): Solid wood output transformer cage
 
 
Featuring Mr.Bean as a psychiatrist, Dr No (Good) as a moron and Ben Kenoby as Yoda.  
 
 
 
cpsjj
13-05-24
16:43:33
回覆 (370): Solid wood output transformer cage
 
 
Our Rowan Feikeung Atkinson, aka Mr. Bean, a name after his little brother, is also featured in the movie.  
 
 
cpsjj
13-05-24
16:26:39
回覆 (369): Solid wood output transformer cage
Margaux Hemingway  
------------------------------------  
 
Wait a min. Is she the one with the sex changed?
bobui
13-05-24
16:12:57
回覆 (368): Solid wood output transformer cage
 
 
There's a movie at the neighboring cinema called "the old fart and the shit", screenplayed by Hemingway; I mean Margaux Hemingway, the super-model with whom I fell in love after the movie "Lipstick" and then started reading his grandpa books.  
 
cpsjj
13-05-24
16:10:05
回覆 (367): Solid wood output transformer cage
There you are
bobui
13-05-24
16:02:54
回覆 (366): Solid wood output transformer cage
The movie is called " The Good doctor, the bad DIYer and the Beauty"  
__________________________________________________________  
 
I can only see the Good doc & the bad DIYer. Where's the Beauty?
Derek2A3
13-05-24
15:40:33
回覆 (365): Solid wood output transformer cage
What movie have you been watching? Can you send me the link? :-)  
-------------------------------------------------------  
 
The movie is called " The Good doctor, the bad DIYer and the Beauty". Here is the link: http://www.1pekingroad.com/zaspx/topics.aspx?topicsno=4
bobui
13-05-24
15:22:43
回覆 (364): Solid wood output transformer cage
 
>only her bra top and panties get burnt<  
___________________________________  
 
What movie have you been watching? Can you send me the link? :-)  
 
thekong
13-05-24
15:08:34
回覆 (363): Solid wood output transformer cage
Like one of those in the movie where a beauty got locked inside mesh cage and the bad guy swing his long stick to activiate a lighting towards on the cage. Right! The cage shield all the harmful electricity so the girl never get killed but only her bra top and panties get burnt.  
 
bobui
13-05-24
14:57:39
回覆 (362): Solid wood output transformer cage
need magnetic material, say steel. or one of those exotic material.
drwkng
13-05-24
14:50:22
回覆 (361): Solid wood output transformer cage
 
So, how about the copper wire chicken cage? I remember some experts said it would even block out the 宇宙射線! ;-)  
 
thekong
13-05-24
14:40:26
回覆 (360): Solid wood output transformer cage
 
 
No la !  
 
limage
13-05-24
14:17:53
回覆 (359): Solid wood output transformer cage
VPI brick help ??
Cadiver
13-05-24
12:58:47
回覆 (358): Solid wood output transformer cage
Faraday shield  
----------------------------------  
 
I thought it only apply to microwave or very high voltage sub-power station. I like to learn more ah!  
 
bobui
13-05-24
12:18:12
回覆 (357): Solid wood output transformer cage
 
 
faraday shield  
____________  
 
 
I would like to know more. Albert's DAC has an oversized transformer which is causing a bit of noise floor on my phono despite moving the Koetsu step-up by another 12 inches away.  
 
limage
13-05-24
11:51:51
回覆 (356): Solid wood output transformer cage
All transformers leak flux. If an output transformer leaks flux into an aluminium chassis, it shouldnt be a problem because aluminum dosnt conduct magnetic flux. But if leaking flux into a steel chassis and pass onto sensitivity circuitry, you will have a problem.  
-----  
ever heard of a faraday shield!
drwkng
13-05-24
11:40:21
回覆 (355): Solid wood output transformer cage
 
 
叧外不如用ebony車快子dok背即  
__________________________  
 
 
 
咁鬼刁鑽都諗到,服晒你囉!  
 
limage
13-05-24
11:34:09
回覆 (354): Solid wood output transformer cage
林下先,最多整個removable cage,聼嘢咪拿起佢羅.  
 
叧外不如用ebony車快子dok背即,呢飯師父該有興趣掛?! :-)  
不過ebony車咁細,失敗會好高, 加時D ebony 好很貴....  
Cadiver
13-05-24
11:23:59
回覆 (353): Solid wood output transformer cage
Output transformers and chokes are usually quite cool, feel free to try your fancy wood cover as you wish. Enjoy!  
 
Wood is a very bad conduction material but very good at containing heat! Best to avoid using any kind of wood as cover for power transformers. Do treat your power source with gentle care please!  
 
Additional Notes:  
All transformers leak flux. If an output transformer leaks flux into an aluminium chassis, it shouldnt be a problem because aluminum dosnt conduct magnetic flux. But if leaking flux into a steel chassis and pass onto sensitivity circuitry, you will have a problem.  
 
Be extra careful when choosing cover/chassis materials and the positioning for any LARGE components in a valve amp, you will be surprise when look closely to what some manufacturers do or not do!  
 
bobui
13-05-24
07:45:29
回覆 (352): Solid wood output transformer cage
i am not so sure it will burn.
drwkng
13-05-23
15:41:35
回覆 (351): Solid wood output transformer cage
i am so sure it will burn. but the wooden case would be very dry and eventually develop cracks. another thing is heat dissipation. wood being such a bad conductor, your transformer will get very hot.
drwkng
13-05-23
15:04:12
回覆 (350): Solid wood output transformer cage
我有小小屎忽很想整個木記output&power牛cover。會係snug fit over existing 牛cover with 一些洞洞。my question, 係米好stupid用木做牛cover,會唔會熱到火足?! I think 木靚仔小小嗎!! 想用ebony,或cocobolo 之類硬木。。。
Cadiver
13-05-23
14:21:52
回覆 (349): Black Rain - 22nd May 2013
I played this tune three times this morning when the rain was dark and sky heavy! Over my Morch 12", the Alphason 9" and a linear tracking terminator arm.  
 
I wish I had time to play a fourth time on the terminator lor!  
 
Sure you know about music that came from one of the most beautiful country on earth, the Czech.  
 
Wait till the music approach 4:20mins. Want to stand up and dance?  
 
 
bobui
13-05-22
19:59:42
回覆 (348): TT21
Is the heart of the issue I want to experiment, not because of cost savings. The only thing that is truely an active component in an amp. The power source lor! Everything else is PASSIVE lor!  
 
Dentist, dont worry, you no need to miss the Happy Hour with me la! Not yet anyway!
bobui
13-05-13
16:52:30
回覆 (347): TT21
You think HK Electric would knock my door for the DC in the mains?  
-----  
no! but the the angel of death will.  
___________________________________________________________  
 
I share the same thoughts as king! bobui, life is too precious, pls have a 2nd thought. After all, how much could a 1:1 mains trans cost?
Derek2A3
13-05-13
16:31:25
回覆 (347): TT21
Serious speaking, its always a fortune to have a qualified pro around! Cant hide from you.  
 
bobui
13-05-13
16:27:52
回覆 (346): TT21
You think HK Electric would knock my door for the DC in the mains?  
-----  
no! but the the angel of death will.
drwkng
13-05-13
16:22:34
回覆 (345): TT21
Here is the amp with a pair of TT21 on each channel.  
 
Yes, the sound of the TT21 is like a man with yellow phlegm in his throat.  
 
I have 36 healthy Svetlana 811-10 in my poccession. You like? How about EL8, I have a German army box containing no less than 80. The idea is to build a push pull amp utilising 20 tubes per channel. Since the tube runs at roughly 250V B+, my initial thinking is not to use a mains transformer. Just direct half wave retification from the mains socket. No need for faliment cow either. Connecting all EL8 in series! In another word, use only Hong Kong Electric sub-station cow!  
 
You think HK Electric would knock my door for the DC in the mains?
bobui
13-05-13
15:53:04
回覆 (344): TT21
i was told by timtube long time ago that gold lion TT21 does not sound like gold ion Kt88. but by all means, have fun.
drwkng
13-05-13
14:35:10
回覆 (343): TT21
 
I like the look too! You have 32 ,or better yet 40, of them,? :-)  
 
thekong
13-05-13
14:23:45
回覆 (342): TT21
Ca you see now? If not, would try to upload again later
bobui
13-05-13
14:20:03
回覆 (341): TT21
TT21 spec is identical to KT88. Only one major difference is that the Anode is not in pin three but on a top cap at the top of the glass.  
 
Only GEC ever made them for high voltage application in mobile equipment. Acquired some long ago when price was still very reasonable. Hooked them up to my modern looking push pull amp and connected them as Troide running at 400V B+. Output power roughly 15 to 18W.  
 
Sound not as clear as 6B4g. A bit rough on the edge if you know what I mean.  
 
There is also a 12.6 faliment version called TT22.  
 
Personally I like the look of top cap valve lor! Kind of industrial rough looks! I like ah!
bobui
13-05-13
14:18:15