Losers' corner for the semi-deaf |
<   >   1 2 3 4 5 6 7 8 9 10 11 12
 
*** ﹝請按主旨作出回應﹞ ***
主旨寄件者更新日期
回覆 (158): Losers' corner for the semi-deaf
Fever is kind of back. Loser is therefore back.  
 
Lots of repairing and setting up finally completed. System can sound again without major cone rubbings or drum like cracking noise.  
 
Also, successfully down grade some gears to even cheaper ones. Having nothing better to do, time to create more problems to fix. :-)  
 
Also trying to go into vinyl more seriously.... Not for the sound. More for the look to be frank.....  
 
Yes, I will start asking a lot of questions again. :-)
http://i7.photobucket.com/albums/y265/benyc217/IMG_4000.jpg?t=1277737169
BenYC
10-06-28
23:04:04
回覆 (157): Losers' corner for the semi-deaf
Welcome to the club. Only "knowing we don't know much" can we really know more.  
BenYC
10-01-26
14:02:30
回覆 (156): Losers' corner for the semi-deaf
There is a fxxking loser here. ME. But I am a great learner too ^^
ken1967
10-01-15
21:36:31
回覆 (155): Losers' corner for the semi-deaf
Good Dr - have you compared the sound between 45 and 47 ? I have heard the 46 in the past.  
---  
no. but what i read seems to imply that 47 is kind of close to 45. so you don't expect very different sound.
drwkng
10-01-15
17:38:29
回覆 (154): Losers' corner for the semi-deaf
i have loads of 5 pin sockets for you to run the 47 if you want to.  
__________________________________________________________  
 
Good Dr - have you compared the sound between 45 and 47 ? I have heard the 46 in the past.
daiwok
10-01-15
17:30:12
回覆 (153): Losers' corner for the semi-deaf
i have loads of 5 pin sockets for you to run the 47 if you want to.
drwkng
10-01-15
16:42:30
回覆 (152): Losers' corner for the semi-deaf
BTW I mention this in the past, what do you think of 2.5K outputting 16ohm for a 45 tube ? my current trannies are 5K outputting on 8K. I heard that current mode for my full range is much better since my AER MD3 are 16ohm :-(  
------  
forget about your 45. get a 47 and run it as a pentode.
drwkng
10-01-15
16:41:45
回覆 (151): Losers' corner for the semi-deaf
Good Dr,  
 
I think you are right that the 10 sometime is better as a driver, I have seen 10 drive 300B with good results overseas.  
 
The 10 does need 10K Tranny.  
 
BTW I mention this in the past, what do you think of 2.5K outputting 16ohm for a 45 tube ? my current trannies are 5K outputting on 8K. I heard that current mode for my full range is much better since my AER MD3 are 16ohm :-(
daiwok
10-01-15
16:34:37
回覆 (150): Losers' corner for the semi-deaf
i don't there should be any problem with 45's treble. if there is, it is more likely to do with the amp than the tube. if you convert the 10 into 45, what transformer are they using. since 45 is more happy with something like 5K trans whereas 10 is into 10K. to me 10 is a strange beast. it takes tons of drive to get a tiny bit of power out. i think it is a much better driver than power tube. i have about ten 10 with 5 from western electric and 5 from hytron(i think) but never get the urge to try it.  
drwkng
10-01-15
16:24:08
回覆 (149): Losers' corner for the semi-deaf
globe VT-25 is the 10 which is rare. I have RCA ones - I hate to smoke them. I agree, the problem with Globe / Balloon tubes is that the construction is like 1920's ! QC - you must be kidding ! I have smoked some tubes in front of my eyes - especially the blue ARCTURUS ones. I have a 80 blue ARTCTURUS and its like fireworks when I plug it in !!! but it measures fine. Some days its fine !  
 
to be honest, I don't have that many valves but enough to keep me going for a while
daiwok
10-01-15
16:14:50
回覆 (148): Losers' corner for the semi-deaf
You have great tube inventory. How nice.  
 
I heard from people that vt-25 globe is the best but they are very expensive. I currently use sylvania normal onees.  
 
As for 45, this is a nightmare to me. I tried CX245 before but no luck. I ended up with rca 45 now. Probably not the best 45 but then again 45 is a tube with tons of versions. It is hard to find a pair of same construction..... don't even bother to think if match or not....  
 
BenYC
10-01-15
16:05:20
回覆 (147): Losers' corner for the semi-deaf
I heard the VT-25 is very holographic, but my 45's are not bad either. I am using balloon 45's and with regards to the treble, I think it would be worth while to hear and compare as I certainly don't have any issues on the treble. I would love to have bought the VT-25 it would be nice to have tried it in my system as my front horns cut off around 200Hz so I don't need full range. With regards to the VT-25's I have Western Electric and Perryman, but I believe my 801a and Globe / Balloon 10's should be superior in sound quality.
daiwok
10-01-15
15:55:02
回覆 (146): Losers' corner for the semi-deaf
Daiwok,  
 
Wow.... 110 db. How lovely.  
 
I think 45 and VT-25 are 2 different animals. 45 is very "real and balance" sounding. VT-25 has a very 3D and holographic presentation with awesome mid-up.  
 
To drive fullrange, I will pick 45 anytime. If for selected mid-high frequency range, VT-25 can be better. (I dislike my 45 treble as it seems to rolled off much. Yet, this maybe due to my 45 tube not up to par.....)  
 
Back to Sun, yen is indeed a trouble. Yet, if just to look at the price tag and the sound... still not a bad deal. I got the 45 (converted from vt-25) quite recently. This is how I kid myself.
BenYC
10-01-15
15:50:38
回覆 (145): Losers' corner for the semi-deaf
BenYC,  
 
My problem is the opposite. I have a Yamamoto A-08s perfectly fine driving 2W into my 110db horns (Azura front horns with AER MD3 drivers). What I need to try is a Sunaudio VT-25. Now 4 years ago I wanted to buy the kit HKD6500 !! cheap as chips, only to be told that there was no stock ! after which the price has spiraled out of control IMHO with the high Yen. Now I also have in my hands some VT25 tubes, 801a and globe 10 - so plenty of food for thought.
daiwok
10-01-15
15:37:12
回覆 (144): Losers' corner for the semi-deaf
I think the 4W would be way too much for my front horns as I am driving them with 2W, but worth a try for sure. If all fails I could try them with the SABA or the QUAD ESL 57's - I guess those are Quicksilvers ? I seen great reviews about them. 4W push pull could mean I could try them in current mode with my front horns - interesting  
___________________________________________  
 
Wow, horn user is rare here. May I know which horn are you using?
BenYC
10-01-15
15:35:34
回覆 (144): Losers' corner for the semi-deaf
King's recommendation is absolutely along the right track. 2A3 being a triode has a much lower output impedance when compared to your 6V6 pentode, thus much better damping. Work with 6V6 triode first, & see how it goes, if result is positive, the next step is 2A3PP. Together with 45 & VT25 you have an all DHT triode 3 way active system.  
____________________________________________  
 
Sounds wonderful indeed.
BenYC
10-01-15
15:34:34
回覆 (144): Losers' corner for the semi-deaf
Daiwok,  
 
I think the Sun VT-25 is a steal for the money. Yet, problem is the 1.2w output. Somehow VT-25 has a very holographic sound if the system can use it.  
 
If VT-25 still does not work, it can also be converted it into an awesome 45 with minimum work and get extra power (2w).  
 
BenYC
10-01-15
15:33:08
回覆 (143): Losers' corner for the semi-deaf
I think the 4W would be way too much for my front horns as I am driving them with 2W, but worth a try for sure. If all fails I could try them with the SABA or the QUAD ESL 57's - I guess those are Quicksilvers ? I seen great reviews about them. 4W push pull could mean I could try them in current mode with my front horns - interesting
daiwok
10-01-15
15:24:43
回覆 (143): Losers' corner for the semi-deaf
Ben,  
 
King's recommendation is absolutely along the right track. 2A3 being a triode has a much lower output impedance when compared to your 6V6 pentode, thus much better damping. Work with 6V6 triode first, & see how it goes, if result is positive, the next step is 2A3PP. Together with 45 & VT25 you have an all DHT triode 3 way active system.
Derek2A3
10-01-15
15:24:02
回覆 (142): Losers' corner for the semi-deaf
 
 
 
Daiwok,  
 
Any interest to try the V72/V73 combo of 4W pp with EL42?  
 
Shall bring these to you next time I visit, if I'll be invited.  
 
 
Photobucket
cpsjj
10-01-15
15:13:08
回覆 (141): Losers' corner for the semi-deaf
BenYC,  
 
I would love to try the Sunaudio VT25 in my system !
daiwok
10-01-15
14:59:47
回覆 (140): Losers' corner for the semi-deaf
Wow... F2aYeung and Drwkng,  
 
You guys are amazing. How come I never thought about all these ideas?!  
 
Let me see how much further I can go. Maybe what I have on hands can already solve my problem with all these changes.  
 
Thanks again.  
 
BenYC
10-01-15
12:15:56
回覆 (139): Losers' corner for the semi-deaf
This is an awesome idea. Any recommendation?  
------  
i thought you have a 6v6 pp. you can consider converting that into a 2a3 pp. is your 6v6 triode connected? if not, you can consider that as well.
drwkng
10-01-15
11:10:35
回覆 (140): Losers' corner for the semi-deaf
>I am now fiddling with the tubes on the 6v6se to see what combo can squeeze out more punch for the bass. This may take me some time.  
 
One thing you can try is to replace the 6V6 cathode bypass cap by Black Gate FK series. You will get rich, punchy & fruity bass. I did that for some of my friends 2A3 Sun Amps and they all like the result. For 6V6 SE the cathode voltage is much smaller so 100uF/25V will be ok.  
 
You can also try 100uF/100V for your 45, VT25 amps
F2aYeung
10-01-15
11:08:30
回覆 (139): Losers' corner for the semi-deaf
Kris,  
 
My stuff are getting more and more beat up. That's for sure. Actually, I did not change much lately. The speaker is just a few drivers in DIY boxes. It was supposed to be a speaker kit from the 50s.... so, as you may guess right. They will fail any time by now....  
 
BTW, you are always welcome. Let's fix a date to get together.  
 
Cheers.
BenYC
10-01-15
10:46:30
回覆 (138): Losers' corner for the semi-deaf
how about a cheap 2A3PP?  
 
_____________________________  
 
Drwkng  
 
This is an awesome idea. Any recommendation?  
 
I am now fiddling with the tubes on the 6v6se to see what combo can squeeze out more punch for the bass. This may take me some time.  
 
BTW, anyone can share experience in which 6sn7 has the best slam?
BenYC
10-01-15
10:41:59
回覆 (137): Losers' corner for the semi-deaf
 
 
 
Reminds me a little bit like lipstick's rig.
kris
10-01-15
08:15:05
回覆 (136): Losers' corner for the semi-deaf
 
 
 
Morning gents,  
 
Wow! Ben, your rig has evolved into quite an animal! Hope to have a chance to visit your beast soon!!
kris
10-01-15
07:58:10
回覆 (135): Losers' corner for the semi-deaf
Maybe something like 8w pp may work...  
 
-----  
how about a cheap 2A3PP?
drwkng
10-01-15
00:29:45
回覆 (134): Losers' corner for the semi-deaf
Thanks for the further info.  
 
Actually, the problem I think I am now facing is -  
 
- 6v6se too weak for bass.  
- 6v6pp too much (cannot match the 45 dynamic at the mid)  
 
Maybe something like 8w pp may work....
BenYC
10-01-14
23:33:20
回覆 (133): Losers' corner for the semi-deaf
I think 6V6 for PP should have enough power la.  
 
Yes for SE, EL12N will give a bit more power similar to EL34 SE.  
Conversion is very easy if the circuit is self-bias  
 
All you need is a pair of converter socket. They are available from Vintage Sound in the central.  
 
Below EL12N on ebay  
I was told they were manufactured in East Germany to compete with Telefunken & Siemens, hence the cheap price.  
 
 
http://cgi.ebay.de/Roehre-EL12N-EL12-RSD-neu-EL12-spez-Tube-amp_W0QQitemZ370314917034QQcmdZViewItemQQptZR%C3%B6hren?hash=item56387d34aa
F2aYeung
10-01-14
23:07:52
回覆 (132): Losers' corner for the semi-deaf
Btw, for EL-12N, you are referring to modifying the 6v6se? This can be a wise option to go.
BenYC
10-01-14
22:54:15
回覆 (131): Losers' corner for the semi-deaf
Thanks for the tip. I am now comparing 6v6 SE with 6V6 pp which I already have. This is quite a battle.  
 
I have tried 6v6pp for bass 6v6se for mid and got them matched nicely but treble vt-25 mis-matched. Also tried 45 to drive treble but treble simply sucks...  
 
Now trying 6v6se for bass but a bit shy. For driving bass, pp has great advantage and the lost detail may not be that apparent. Now trying to use cable to help but failure rate should be high.  
 
In any event, thanks for the EL12N tip again. Not sure if you remember, you were one to asked me to convert vt-25 to 45 went using La Scala back then. Great advice indeed.  
 
BenYC
10-01-14
22:52:07
回覆 (130): Losers' corner for the semi-deaf
You can modify and try EL12N at dirt cheap price.  
This should be the most under-valued pentode. I tried them in my Klangfilm and beat all the EL34 except Gold Lion KT77  
 
6V6 is fast and tuneful. I had Radio Craftsmen amps before. EL12N is equally fast with tight bass.
F2aYeung
10-01-14
21:58:28
回覆 (129): Losers' corner for the semi-deaf
Yes, they are all Sun. I am using 6v6 for bass, 45 for mid and vt-25 for treble.  
 
Still struggling with 6v6 being a bit underpower. Yet, small power pp is hard to find these days....  
 
 
 
BenYC
10-01-14
21:54:04
回覆 (128): Losers' corner for the semi-deaf
Very neat combination!  
 
Are those 3 Sun Audio amps all using VT25 for woofer,mid and high?  
Or 2A3, 300B...?  
 
F2aYeung
10-01-14
21:50:12
回覆 (127): Losers' corner for the semi-deaf
Finally all black/grey....  
 
All relatively beat up and old stuff. Nothing exotic. Best in driving me crazy.
BenYC
10-01-14
21:34:54
回覆 (126): Losers' corner for the semi-deaf
Hi Derek,  
 
Thanks for offering help. My helper just returned to deal with my 2 little bosses. I should able to get my freedom on Saturday back after this one. I will keep you posted. You will probably see some familar faces too.  
 
Cheers,  
Ben
BenYC
10-01-14
21:15:31
回覆 (125): Losers' corner for the semi-deaf
Ben,  
 
Using human voice to adjust the crossover is no easy task, & as you pointed out Sammy's voice did evolve over time. Fix a day & see which monkey can show up & give a hand.  
 
Monkey # 1
Derek2A3
10-01-14
11:52:29
回覆 (124): Losers' corner for the semi-deaf
A bit of update incase someone is celebrating my death. Pls be disappointed as I am still around.  
 
Over last few months, I have been running in circles. Fiddling with the crossover has indeed open up tons of variables and at the end of the day, it is like giving a computer to a monkey. What the heck should I do with it....  
 
Yet, having a crush on old stuff, I have no other option except to continue to use this kind of junk gear. The original crossover is impossible to get or built. So, I guess I have to deal with whatever I have here.  
 
Experience gained thou - Steps as follows:  
1. Adjust the tonal balance first with 1 channel only.  
2. Match each individual L and R per way by using mono.  
3. Hit the head hard  
 
As for this whole exercise, the trick is obviously number 1. What is accurate...? Even with normal speaker, this is a highly difficult if not impossible task and now I have a choice to further mess it up. My current mental challenge is Sammy Cheng. I like her songs in the 90s. I thought I could remember her voice and wanted to use her voice to adjust. Yet, I also hear her current new songs. This confused me. Is 2010 voice same as 1990s? If not, am I benchmarking the wrong stuff?....  
 
To go one step further - This problem apply to all cds.... and I am the one that always think there is no such think as accurate in hifi....  
 
Conclusion - i am further lost and downgraded from a semideaf person to a semideaf monkey.  
 
If somehow you guys are free, pls do come help me out a bit.  
 
Yes, I need all the help I can get as usual.  
 
 
Cheers.
BenYC
10-01-14
11:28:15
<   >   1 2 3 4 5 6 7 8 9 10 11 12