Also plenty of choices for the 6N30 - from low-to-high prices (Saratov-made DR versions). Shame on ARC and others calling it a "super" tube - and boosting the prices for the gullible!
Does anyone care to ask an amplifier designer a technical question? My door is open.
I closed the cable and fuse thread because the trolls were making a mess of things. I hope they dont find me here.
I design Tube and Solid State power amps and preamps for Music Reference. I have a degree in Electrical Engineering, have trained my ears keenly to hear frequency response differences, distortion and pretty good at guessing SPL. Ive spent 40 years doing that as a tech, store owner, and designer.
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Perhaps someone would like to ask a question about how one designs a successfull amplifier? What determines damping factor and what damping factor does besides damping the woofer. There is an entirely different, I feel better way to look at damping and call it Regulation , which is 1/damping.
I like to tell true stories of my experience with others in this industry.
I have started a school which you can visit at http://berkeleyhifischool.com/ There you can see some of my presentations.
On YouTube go to the Music Reference channel to see how to design and build your own tube linestage. The series has over 200,000 views. You have to hit the video tab to see all.
I am not here to advertise for MR. Soon I will be making and posting more videos on YouTube. I don’t make any money off the videos, I just want to share knowledge and I hope others will share knowledge. Asking a good question is actually a display of your knowledge because you know enough to formulate a decent question.
Starting in January I plan to make these videos and post them on the HiFi school site and hosted on a new YouTube channel belonging to the school.
I design Tube and Solid State power amps and preamps for Music Reference. I have a degree in Electrical Engineering, have trained my ears keenly to hear frequency response differences, distortion and pretty good at guessing SPL. Ive spent 40 years doing that as a tech, store owner, and designer.
.
Perhaps someone would like to ask a question about how one designs a successfull amplifier? What determines damping factor and what damping factor does besides damping the woofer. There is an entirely different, I feel better way to look at damping and call it Regulation , which is 1/damping.
I like to tell true stories of my experience with others in this industry.
I have started a school which you can visit at http://berkeleyhifischool.com/ There you can see some of my presentations.
On YouTube go to the Music Reference channel to see how to design and build your own tube linestage. The series has over 200,000 views. You have to hit the video tab to see all.
I am not here to advertise for MR. Soon I will be making and posting more videos on YouTube. I don’t make any money off the videos, I just want to share knowledge and I hope others will share knowledge. Asking a good question is actually a display of your knowledge because you know enough to formulate a decent question.
Starting in January I plan to make these videos and post them on the HiFi school site and hosted on a new YouTube channel belonging to the school.
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- 845 posts total
Thanks.@prof Don't feel bad. A lot of designers don't get it either! Good question. Cartridges are very different in how they respond to loading. My Denon 103 is a 14 ohm cartridge (as I recall) and likes 100 -200ohms load. More load drops signal level, dont ever go that far, and makes the sound rather dead. No load is rather bright.Roger, you might want to do some reading at the links I posted in my prior post. Most of this post (except perhaps the comments about subjective listening) is incorrect. As I pointed out earlier, the load is not for the cartridge's benefit- its about the preamp. The 6SN7 was made for black and white TV and was never, to my knowledge, used in the audio chain.There's plenty of old school audio electronics that used the 6SN7. As you know, its geometry is similar to that of the 6CG7/12BH7 and 12AU7 (the latter being the same as the 12BH7 but with the entire structure sawed in half). If you need examples, Google: https://www.google.com/search?client=ubuntu&channel=fs&biw=1440&bih=729&tbm=isch&... Now if the 6SN7 is not really a good audio tube, why does VAC use it on the entire line of amps as input tubes? He could have used a 6SL7 or 6CG7 or variant.Its because it *is* a good audio tube. That is why so many manufacturers used it on the old days, prior to octal based tubes being replaced by miniature tubes. Its considerably less microphonic than 6DJ8s, although almost any signal tube has to be hand picked for low microphonics. Folks, you can't just pull a tube out of a box and expect that it going to do the job. It really should be tested, but testing for microphonics means listening to the tube to see if its acceptable. I don't agree with George's comments about microphonics equating to euphonic character! As anyone who has played with tubes knows, microphonics is *not* musical or euphonic. If you hear that quality in a microphonic tube, its doing that **in spite** of the microphonics! |
@mrdecibel indeed.....I think IF memory serves correctly we sold at least 4 pair of them including to a bar owner who loved his music while tending bar.... On a lark one night at the store, while owner away, we biamped them w DH500 on the low end and a DH200 on top ( we had better amos but wanted similar tranfers function )..Played Peter Gabriel - Security...that CD has some low end wallop !!!!! wow... I would buy a pair today just for grins....ha |
- 845 posts total