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atmasphere

Responses from atmasphere

Whats on your turntable tonight?
Rush, have you heard any of the Decca recordings of Wagner with Solti conducting? For many years his recording of the Ring (and the annual visitation from the Met) were in many ways a penultimate audio experience for me. It took me years to finall... 
Can 5AR4 be replaced by 5U4G or 274B?
The 5AR4 has a controlled warm-up characteristic, but otherwise handles conditions similar to the 5U4. The voltage drops are a little different too.Generally if a 5AR4 is in an amplifier you can count on it being there either due to space consider... 
How many types..
Silvaweld, Graaf and Croft are three more.Generally OTLs seem to split along two lines: Symettrical circuitry, using a Circlotron for an output circuit, and Asymettrical, using a Totem Pole output, which looks a bit like a mu-follower circuit.OTLs... 
A few systems heard at the Rocky Mntn. audiofest
Having exhibited at the shows for some 16 years now, I have found that the only way to survive the show is to play the music that I like personally. My taste is not that of the average audiophile- I like new material a lot, from ambient to punk, m... 
Historical look at amps
It might be a little late to comment on this, but here at Atma-Sphere we use an old school means of defining feedback:A cathode or emitter resistor is a form of negative feedback called *degeneration*. This form of feedback occurs in real time and... 
Can you have too many tubes?
How many tubes you have in boxes doesn't count. If it did, I got y'all beat. But does a vacuum tube LP cutter system count?? 
Can you have too many tubes?
Can you have too many tubes? No. More tubes is more better. 
Why dosome high pwr amps fail to drive some spkrs?
Hi Ulf,- it remains a fact that not all amps will drive all speakers, in fact, you have to be very careful to make sure that the amp and speaker interface is doing what it should.Speaker cables, the length of the cables, the use of negative feedba... 
Your opinion on the evolution of amps since 70s?
Hi jay_douglas_287@msn.com to some degree you are correct but only for certain parts and materials. In 1970, Teflon parts were astronomical in price- about $1,000 apiece in round numbers, today a Teflon part is a fraction of that. But Caddock resi... 
Your opinion on the evolution of amps since 70s?
Both transistor amplifiers and tube amplifiers have seen plenty of evolution since the 50s , 60s and 70s. I have had a hands on experience with both as I ran a consumer electronics repair shop for a number of years during and after college.With re... 
best 5-20K speakers for high-end tube amp?
Another speaker that you might consider is the Classic Audio Reproductions Project T1 or Project T3. The two are very similar, being full range (read: cutoff at 20Hz) and easy to drive all at once. Their efficiency is a little lower then most horn... 
Any heard of Porcupine Tree?
If you are looking for one and only one Porcupine Tree album to introduce yourself to the band, my recommendation is either Signify or Coma Divine. Both are available on LP. Either of these gives you an idea of the extended jams that are the ear c... 
Any heard of Porcupine Tree?
I think we were lucky here in Minneapolis. The sound was great. The performance was great too, even though coming off of 7 days of straight performance. I saw Paul Bolin of Stereophile in the audience. He's a big fan. I think in many ways Signify ... 
Whats on your turntable tonight?
Hi Rushton, I try to keep moving. Most of my employees are in bands so I get a lot of exposure to new music. Music in general is exploding right now and there is an amazing amount of excellent stuff going on!! Tonight:Vilayat Khan - EMI I've not h... 
Indian Sitar Stuff
There are three labels you will want to look for. The first is anything on Connoisseur Society. They are superbly recorded and there are special 45rpm editions of some of the LPs. This was being done back in the 60s and early 70s! All tube mastere...