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I have 3 of these tuners I am working on. I am in the market for at least one pair of 12AX7s.
Which would be recommended for best sound in this tuner?
I do see used Dynaco labeled 12AX7s on the bay, not outrageously priced.
Maybe can't go wrong with Dynacos for this tuner?
Follow Ups:
For something less stratospherically priced and available, you might want to try offerings from JJ.
The frame-grid version is my favorite one, but the 803s with the long plates are also very nice.
I bought two of the frame grid JJ's to audition. They sound pretty good so I bought two more to have in my stock. And I paid the surcharge to have the pairs matched for output, with low noise and microphics.
I have noticed they do not match the amazing sound of the dynaco labelled tubes. Less "air", less extension/clarity in the highs, and less dynamic range. This suprrised me. I really did not expect to be able to detect any noticeable difference.
But although the difference is noticeable with careful, longer term listening, the JJ's are stil keepers, quite pleasant sounding in the FM3. I guess it should also be noted that the user manual does suggest a re-alignment may be neccessary when tubes are changed in the tuner, so there is that...
Glad they worked out for you.
I've laid-in a small stock of them too. I alternate between the JJ fg and Ei's in my preamp in the big rig. Can't decide which I like best.
Good to know, I will definitely give them a try.
Are you using them in an FM-3?
No, I am not.FM around here is mostly a wasteland, and no room for a tuner in the rack. I am using their 12AX7's of one type or another in four other pieces of gear. My favorite is the frame grid tube, but also very fond of the warmer sounding 803s.
No affiliation at all, but always satisfied with service and tubes from The Tube Depot.
Edits: 03/09/24
Yeah I am very lucky here to have a very nice FM classical station with pretty good LOS signal from my 2nd floor balcony using a 4 element YAGI.
One of the very few things I like about living in Sin City...
I did order a couple of those you recommended, matched, balanced etc.
Let us know what you think.
Well at 71 years of age I can't claim to have golden ears but I will try the tubes in one of my two "good sounding" FM-3s and see if I can make a comparison vs. the Dynaco branded tubes...
Most of the 12ax7s that I have seen that are labeled Dynaco (and I have probably 40 of them and have seen many more) have been Telefunken tubes. Those are very good 12ax7s.
They sound good and last a long time.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Dynaco didn't make 12AX7, so those "Dynaco" tubes could be from several origins. You might want to be more precise about what you want.
Can you elaborate on what qualities you'd like to have from the "best sound" for your taste?
Thanks, if I can affort them I will probably follow Tre's advice and look for Telefunkens.
...for your listening pleasure!
Yeah - as mentioned, most often the "Dynaco"-branded 12AX7 is actually a Telefunken. But Dynaco used both smooth-plate and ribbed-plate versions of the Telefunken ECC83. Of those two, I feel that the ribbed-plate is actually a lot more accurate in its full sonic spectrum. You'll get higher treble extension from the ribbed-plate, and fuller low frequencies.
Lots of folks like the smooth-plate Telefunken, and they have their reputation because of their unique upper-midrange emphasis, without having pokey treble that can cause listening fatigue. They'll have less bass content than the ribbed-plate. And if treble is something you'd like to avoid or minimize, then I'd say choose smooth over ribbed. Personally, I hear greater signal clarity with the ribbed.
.
Your interest may vary but the results will be same. (Byrd 2020)
I can't compete with the dead. (Buck W. 2010)
Cowards can't be heroes. (Byrd 2017)
Why don't catfish have kittens? (Moe Howard 1937)
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