- Different tubes do make a difference! - 5 Updates
| etpm@whidbey.com: Jul 19 12:39PM -0700 One of the EL34 tubes in my amp was making intermittent noise so I bought a couple new matched EL 34 tubes and put them in the amp. They sounded OK but not great. At first I thought it was the particular recording that was sounding so bad because the recording was bad. It was the Happy Trails album by Quicksilver Messaging Service. The original recording just wasn't the best quality. Then about a week later I was listening to some Herbie Hancock and the sound was kinda muddy or muffled sounding. It did not have the same clarity as it did with the first set of tubes. So I swapped in the old pair and and there was a marked difference in the quality of the sound. I was really surprised at the difference. Now I gotta shop for some better tubes. What is done in the manufacturing of tubes that can have such a big difference? Eric |
| John-Del <ohger1s@gmail.com>: Jul 19 04:04PM -0700 > Now I gotta shop for some better tubes. What is done in the > manufacturing of tubes that can have such a big difference? > Eric I can't answer your question, but would it have killed you to put the brand names of the original set of outputs and the replacement set you installed, or the amp you're using? Also, did you bias the new tubes properly? If they're running too cold they'll sound like crap. I never heard much difference between brands of EL34s, 6CA7s, and even 8417s I've used in my vintage Fisher integrated amp. They all sounded fine until they became flabby with age. |
| Phil Allison <pallison49@gmail.com>: Jul 20 02:23AM -0700 John-Del = Dope wrote: =========================== > I can't answer your question, * It ain't a Q - it's a troll. but would it have killed you to put the brand names of the original set of outputs and the replacement set you installed, or the amp you're using? ** Nowadays, there are only two kinds of *new* EL34s, Chinese and Russian. The former suck while the latter are mostly OK. > I never heard much difference between brands of EL34s, 6CA7s, > and even 8417s I've used in my vintage Fisher integrated amp. > They all sounded fine until they became flabby with age. ** Happens to people too.... ... Phil |
| etpm@whidbey.com: Jul 20 08:57AM -0700 On Sun, 19 Jul 2020 16:04:12 -0700 (PDT), John-Del <ohger1s@gmail.com> wrote: >I can't answer your question, but would it have killed you to put the brand names of the original set of outputs and the replacement set you installed, or the amp you're using? >Also, did you bias the new tubes properly? If they're running too cold they'll sound like crap. >I never heard much difference between brands of EL34s, 6CA7s, and even 8417s I've used in my vintage Fisher integrated amp. They all sounded fine until they became flabby with age. Yeah, I almost had a heart attack when I tried posting the name brands. But I'm not the type who gives up easily. The better sounding tubes are Psvane brand tubes. The worse sounding tubes are Electro-Harmonics. Oh crap! My heart! Call 911! This is the amp: https://www.aliexpress.com/i/1988522234.html The amp has no bias adjustment. I know that different circuits are used for adjustable bias and auto bias. Could it really make that big of a difference? Should I consider modding the circuit so that the bias is adjustable? Thanks, Eric |
| Fox's Mercantile <jdangus@att.net>: Jul 20 11:30AM -0500 > Could it really make that big of a difference? Should I > consider modding the circuit so that the bias is adjustable? Yes -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
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