The Chinese (Sino) made Shuguang EL34-B tube is sold by Ruby Tubes as their EL34B-STR
Shuguang EL34-B Audio Tubes - www.thetubestore.com
Shuguang EL34-B Audio Tubes - www.thetubestore.com
TAD EL-34B STR has no pentode curve in their datasheet and only triode curve which is dissimilar to Shuguang's.
EL34B是中国湖南长沙曙光电子管厂产的，TAD仅贴牌，其它EL34皆可互换，差别不大
This el34b is produced by Shuguang Electronic Tube Factory in Changsha City, Hunan Province, China. TAD only pastes its own trademark. All el34s can replace each other, and there is little difference between them
This el34b is produced by Shuguang Electronic Tube Factory in Changsha City, Hunan Province, China. TAD only pastes its own trademark. All el34s can replace each other, and there is little difference between them
Have a look at the base, does Shuguan tube has this marking?
Verstarkerrohren und Zubehor fur Verstarker und Gitarren | Tube Amp Doctor
Verstarkerrohren und Zubehor fur Verstarker und Gitarren | Tube Amp Doctor
曙光EL34B管基有标，以别订方，身以漆印订方标，如供内需则印本厂新标，为一飞雁，且管基仅有脚号
The bottom of Shuguang el34b electronic tube base is marked to distinguish different ordering clients. At the same time, the tube body is painted with the logo of the client. If the tube body is supplied for domestic use in China, the new version of Shuguang logo is printed, which is a wild goose, and the pin number is marked at the bottom of the electronic tube base
The bottom of Shuguang el34b electronic tube base is marked to distinguish different ordering clients. At the same time, the tube body is painted with the logo of the client. If the tube body is supplied for domestic use in China, the new version of Shuguang logo is printed, which is a wild goose, and the pin number is marked at the bottom of the electronic tube base
Thank you very much, I'm satisfied with your answer.
One more thing, do you have any advice or information as to which datasheet is associated with TAD EL34B-STR? I don't think the one on their website is usable.
One more thing, do you have any advice or information as to which datasheet is associated with TAD EL34B-STR? I don't think the one on their website is usable.
Thanks for Dragon Lord's describe about EL34 information so detail.
I use Shuguang's tube for more than 15 years , it 's function working reliable and price are reasonable!
I use Shuguang's tube for more than 15 years , it 's function working reliable and price are reasonable!
The problem with TAD, is that they could take any rubbish tubes, test them and slap the TAD badge on them. I got 2 TAD 6SN7s from them. and one of them failed after 200 hours. I also bought 2 matched JJ 300Bs from TAD and one of them started to go low emission after a couple of hundred hours. How that can happen with serial numbered, guaranteed tubes from the maker puzzles me.
可惜前些年曙光大火，商家狂囤管子，现国内管价大涨，悲哉
Unfortunately, a fire broke out in Shuguang Electronic Tube Factory not long ago. Speculators hoarded it on a large scale, resulting in a significant increase in the price of electronic tubes in China. This is very sad 🙁
Unfortunately, a fire broke out in Shuguang Electronic Tube Factory not long ago. Speculators hoarded it on a large scale, resulting in a significant increase in the price of electronic tubes in China. This is very sad 🙁