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#1
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
Its a little known fact that one may take advantage of the UL
connection even when you don't like to. Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. With pure class A1 PP amps or SE class A1 amps there is no reason why ppl should not use UL taps at 75% of the P turns. One might say well the triode connection is the best but you'll only get about 6W from an EL34 in triode. The power output is rarely more than 27% of power input because the Ea minimum swing is restricted by the onset of grid current. But when you look at the load lines you can see that one could swing a bit further if you had the tube in pentode and get 9W from 24W of idle power. Well, To get the swing you need, try screen taps up to 75%. The Ra will then be about 2k which is not much above triode Ra of 1,250 ohms. And RL can be say about 5k, so the DF is still OK, and linearity virtually equal to triodes. I have tried this trick in conjunction with CFB windings where the CFB = 12.5% and UL taps are at 62.5% of the total P turns. If the OPT has 5K:5 ohm ratio, you get Rout = 1.1 ohm. Overall gain is then like a 300B, about 4.5, Va-k divided by Vg-0V. About 48Vrms to the grid is needed for clipping. I get 8.5W with Ea = 350V, Ia + Ig2 = Ik = 66mA. Distortion is virtually all 2H until near clipping. Patrick Turner. |
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#2
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Mar 29, 3:34*pm, Patrick Turner wrote:
Its a little known fact that one may take advantage of the UL connection even when you don't like to. Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. With pure class A1 PP amps or SE class A1 amps there is no reason why ppl should not use UL taps at 75% of the P turns. One might say well the triode connection is the best but you'll only get about 6W from an EL34 in triode. The power output is rarely more than 27% of power input because the Ea minimum swing is restricted by the onset of grid current. But when you look at the load lines you can see that one could swing a bit further if you had the tube in pentode and get 9W from 24W of idle power. Well, To get the swing you need, try screen taps up to 75%. The Ra will then be about 2k which is not much above triode Ra of 1,250 ohms. And RL can be say about 5k, so the DF is still OK, and linearity virtually equal to triodes. I have tried this trick in conjunction with CFB windings where the CFB = 12.5% and UL taps are at 62.5% of the total P turns. If the OPT has 5K:5 ohm ratio, you get Rout = 1.1 ohm. Overall gain is then like a 300B, about 4.5, Va-k divided by Vg-0V. About 48Vrms to the grid is needed for clipping. I get 8.5W with Ea = 350V, Ia + Ig2 = Ik = 66mA. Distortion is virtually all 2H until near clipping. Patrick Turner. Clever, this, Patrick, for those who can wind their own iron. Those of us who have buy our iron out of a catalogue have to be satisfied with half your power. From http://www.audio-talk.co.uk/fiultra/...0ON%20AMPS.htm we have this simple SE EL34 integrated linestage built with only three valves (envelopes, actually, as there are in total four valves) to drive an efficient speakers (also shown at the above site): http://www.audio-talk.co.uk/fiultra/...L34-SEntry.jpg More power to your arm, pal. Andre Jute Visit Jute on Amps at http://www.audio-talk.co.uk/fiultra/ "wonderfully well written and reasoned information for the tube audio constructor" John Broskie TubeCAD & GlassWare "an unbelievably comprehensive web site containing vital gems of wisdom" Stuart Perry Hi-Fi News & Record Review |
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#3
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Mar 29, 2:20�pm, Andre Jute wrote:
On Mar 29, 3:34�pm, Patrick Turner wrote: Its a little known fact that one may take advantage of the UL connection even when you don't like to. Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. With pure class A1 PP amps or SE class A1 amps there is no reason why ppl should not use UL taps at 75% of the P turns. One might say well the triode connection is the best but you'll only get about 6W from an EL34 in triode. The power output is rarely more than 27% of power input because the Ea minimum swing is restricted by the onset of grid current. But when you look at the load lines you can see that one could swing a bit further if you had the tube in pentode and get 9W from 24W of idle power. Well, To get the swing you need, try screen taps up to 75%. The Ra will then be about 2k which is not much above triode Ra of 1,250 ohms. And RL can be say about 5k, so the DF is still OK, and linearity virtually equal to triodes. I have tried this trick in conjunction with CFB windings where the CFB = 12.5% and UL taps are at 62.5% of the total P turns. If the OPT has 5K:5 ohm ratio, you get Rout = 1.1 ohm. Overall gain is then like a 300B, about 4.5, Va-k divided by Vg-0V. About 48Vrms to the grid is needed for clipping. I get 8.5W with Ea = 350V, Ia + Ig2 = Ik = 66mA. Distortion is virtually all 2H until near clipping. Patrick Turner. Clever, this, Patrick, for those who can wind their own iron. Those of us who have buy our iron out of a catalogue have to be satisfied with half your power. From �http://www.audio-talk.co.uk/fiultra/...0ON%20AMPS.htm �we have this simple SE EL34 integrated linestage built with only three valves (envelopes, actually, as there are in total four valves) to drive an efficient speakers (also shown at the above site): �http://www.audio-talk.co.uk/fiultra/...L34-SEntry.jpg More power to your arm, pal. Andre Jute Visit Jute on Amps at �http://www.audio-talk.co.uk/fiultra/ "wonderfully well written and reasoned information for the tube audio constructor" John Broskie TubeCAD & GlassWare "an unbelievably comprehensive web site containing vital gems of wisdom" Stuart Perry Hi-Fi News & Record Review- Hide quoted text - - Show quoted text - Hi RATs! Yes, trying to make it loud using the amplifier is just another way to waste as much time and money as is available  Power output is measured using a steady signal, either Sin wave or white noise. A constant signal allows accurate measurement. Music is, at least in the olden times, was, not a constant signal. This is where the two major politcal parties of the audio arena diverge. Do we want accurate information or beautiful Music. Both sides assume they know the truth. We will never know the truth. We are human, not smart  My EL34 amp was UL, factory. It is now triode, with a diode and an R between Plate and Screen. The Z of the OPT is now much greater than optimal for max power output. It does sound really good And the classic EL34/6CA7 has been replaced by 6BQ6-GTB, further reducing power output. Oh, the horror 8*P It does sound really, really good. None of us knows everything, but, some of us just do whatever sounds "nice". Life ain't a Force March for everyone, some of us Samba. Ole! Happy Ears! Al |
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#4
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Mar 30, 10:49*pm, "Watt? Me worry?" wrote:
On Mar 29, 2:20 pm, Andre Jute wrote: On Mar 29, 3:34 pm, Patrick Turner wrote: Its a little known fact that one may take advantage of the UL connection even when you don't like to. Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. With pure class A1 PP amps or SE class A1 amps there is no reason why ppl should not use UL taps at 75% of the P turns. One might say well the triode connection is the best but you'll only get about 6W from an EL34 in triode. The power output is rarely more than 27% of power input because the Ea minimum swing is restricted by the onset of grid current. But when you look at the load lines you can see that one could swing a bit further if you had the tube in pentode and get 9W from 24W of idle power. Well, To get the swing you need, try screen taps up to 75%. The Ra will then be about 2k which is not much above triode Ra of 1,250 ohms. And RL can be say about 5k, so the DF is still OK, and linearity virtually equal to triodes. I have tried this trick in conjunction with CFB windings where the CFB = 12.5% and UL taps are at 62.5% of the total P turns. If the OPT has 5K:5 ohm ratio, you get Rout = 1.1 ohm. Overall gain is then like a 300B, about 4.5, Va-k divided by Vg-0V. About 48Vrms to the grid is needed for clipping. I get 8.5W with Ea = 350V, Ia + Ig2 = Ik = 66mA. Distortion is virtually all 2H until near clipping. Patrick Turner. Clever, this, Patrick, for those who can wind their own iron. Those of us who have buy our iron out of a catalogue have to be satisfied with half your power. From http://www.audio-talk.co.uk/fiultra/...0ON%20AMPS.htm we have this simple SE EL34 integrated linestage built with only three valves (envelopes, actually, as there are in total four valves) to drive an efficient speakers (also shown at the above site): http://www.audio-talk.co.uk/fiultra/...L34-SEntry.jpg More power to your arm, pal. Andre Jute Visit Jute on Amps at http://www.audio-talk.co.uk/fiultra/ "wonderfully well written and reasoned information for the tube audio constructor" John Broskie TubeCAD & GlassWare "an unbelievably comprehensive web site containing vital gems of wisdom" Stuart Perry Hi-Fi News & Record Review- Hide quoted text - - Show quoted text - Hi RATs! Yes, trying to make it loud using the amplifier is just another way to waste as much time and money as is available Power output is measured using a steady signal, either Sin wave or white noise. A constant signal allows accurate measurement. Music is, at least in the olden times, was, not a constant signal. This is where the two major politcal parties of the audio arena diverge. Do we want accurate information or beautiful Music. Both sides assume they know the truth. We will never know the truth. We are human, not smart My EL34 amp was UL, factory. It is now triode, with a diode and an R between Plate and Screen. The Z of the OPT is now much greater than optimal for max power output. It does sound really good Hi Al, What ya hiding here with this business of a DIODE plus screen stopper resistor between anode and screen??? Just wtf does the diode actually do, in your own words, in your own time? Patrick Turner. And the classic EL34/6CA7 has been replaced by 6BQ6-GTB, further reducing power output. Oh, the horror 8*P It does sound really, really good. None of us knows everything, but, some of us just do whatever sounds "nice". Life ain't a Force March for everyone, some of us Samba. Ole! Happy Ears! Al- Hide quoted text - - Show quoted text - |
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#5
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Mar 30, 9:37�pm, Patrick Turner wrote:
On Mar 30, 10:49�pm, "Watt? Me worry?" wrote: On Mar 29, 2:20 pm, Andre Jute wrote: On Mar 29, 3:34 pm, Patrick Turner wrote: Its a little known fact that one may take advantage of the UL connection even when you don't like to. Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. With pure class A1 PP amps or SE class A1 amps there is no reason why ppl should not use UL taps at 75% of the P turns. One might say well the triode connection is the best but you'll only get about 6W from an EL34 in triode. The power output is rarely more than 27% of power input because the Ea minimum swing is restricted by the onset of grid current. But when you look at the load lines you can see that one could swing a bit further if you had the tube in pentode and get 9W from 24W of idle power. Well, To get the swing you need, try screen taps up to 75%. The Ra will then be about 2k which is not much above triode Ra of 1,250 ohms. And RL can be say about 5k, so the DF is still OK, and linearity virtually equal to triodes. I have tried this trick in conjunction with CFB windings where the CFB = 12.5% and UL taps are at 62.5% of the total P turns. If the OPT has 5K:5 ohm ratio, you get Rout = 1.1 ohm. Overall gain is then like a 300B, about 4.5, Va-k divided by Vg-0V. About 48Vrms to the grid is needed for clipping. I get 8.5W with Ea = 350V, Ia + Ig2 = Ik = 66mA. Distortion is virtually all 2H until near clipping. Patrick Turner. Clever, this, Patrick, for those who can wind their own iron. Those of us who have buy our iron out of a catalogue have to be satisfied with half your power. From http://www.audio-talk.co.uk/fiultra/...0ON%20AMPS.htm we have this simple SE EL34 integrated linestage built with only three valves (envelopes, actually, as there are in total four valves) to drive an efficient speakers (also shown at the above site): http://www.audio-talk.co.uk/fiultra/...L34-SEntry.jpg More power to your arm, pal. Andre Jute Visit Jute on Amps at http://www.audio-talk.co.uk/fiultra/ "wonderfully well written and reasoned information for the tube audio constructor" John Broskie TubeCAD & GlassWare "an unbelievably comprehensive web site containing vital gems of wisdom" Stuart Perry Hi-Fi News & Record Review- Hide quoted text - - Show quoted text - Hi RATs! Yes, trying to make it loud using the amplifier is just another way to waste as much time and money as is available Power output is measured using a steady signal, either Sin wave or white noise. A constant signal allows accurate measurement. Music is, at least in the olden times, was, not a constant signal. This is where the two major politcal parties of the audio arena diverge. Do we want accurate information or beautiful Music. Both sides assume they know the truth. We will never know the truth. We are human, not smart My EL34 amp was UL, factory. It is now triode, with a diode and an R between Plate and Screen. The Z of the OPT is now much greater than optimal for max power output. It does sound really good Hi Al, What ya hiding here with this business of a DIODE plus screen stopper resistor between anode and screen??? Just wtf does the diode actually do, in your own words, in your own time? Patrick Turner. And the classic EL34/6CA7 has been replaced by 6BQ6-GTB, further reducing power output. Oh, the horror 8*P It does sound really, really good. None of us knows everything, but, some of us just do whatever sounds "nice". Life ain't a Force March for everyone, some of us Samba. Ole! Happy Ears! Al- Hide quoted text - - Show quoted text -- Hide quoted text - - Show quoted text -- Hide quoted text - - Show quoted text - Hi RATs! The diode prevents the screen from going the wrong way or something. Someone said they liked the sound, so I tried it. It sounds better. No clue why. I use big 40A 1000V Ultrafast units. It was the only size the store had four of... Happy Ears! Al |
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#6
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Apr 1, 3:01*am, "Watt? Me worry?" wrote:
On Mar 30, 9:37 pm, Patrick Turner wrote: Hi RATs! The diode prevents the screen from going the wrong way or something. Someone said they liked the sound, so I tried it. It sounds better. No clue why. I use big 40A 1000V Ultrafast units. It was the only size the store had four of... Happy Ears! Al It may have originated from here http://oestex.com/tubes/ |
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#7
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Mar 31, 3:37*am, Patrick Turner wrote:
On Mar 30, 10:49*pm, "Watt? Me worry?" wrote: On Mar 29, 2:20 pm, Andre Jute wrote: On Mar 29, 3:34 pm, Patrick Turner wrote: Its a little known fact that one may take advantage of the UL connection even when you don't like to. Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. With pure class A1 PP amps or SE class A1 amps there is no reason why ppl should not use UL taps at 75% of the P turns. One might say well the triode connection is the best but you'll only get about 6W from an EL34 in triode. The power output is rarely more than 27% of power input because the Ea minimum swing is restricted by the onset of grid current. But when you look at the load lines you can see that one could swing a bit further if you had the tube in pentode and get 9W from 24W of idle power. Well, To get the swing you need, try screen taps up to 75%. The Ra will then be about 2k which is not much above triode Ra of 1,250 ohms. And RL can be say about 5k, so the DF is still OK, and linearity virtually equal to triodes. I have tried this trick in conjunction with CFB windings where the CFB = 12.5% and UL taps are at 62.5% of the total P turns. If the OPT has 5K:5 ohm ratio, you get Rout = 1.1 ohm. Overall gain is then like a 300B, about 4.5, Va-k divided by Vg-0V. About 48Vrms to the grid is needed for clipping. I get 8.5W with Ea = 350V, Ia + Ig2 = Ik = 66mA. Distortion is virtually all 2H until near clipping. Patrick Turner. Clever, this, Patrick, for those who can wind their own iron. Those of us who have buy our iron out of a catalogue have to be satisfied with half your power. From http://www.audio-talk.co.uk/fiultra/...0ON%20AMPS.htm we have this simple SE EL34 integrated linestage built with only three valves (envelopes, actually, as there are in total four valves) to drive an efficient speakers (also shown at the above site): http://www.audio-talk.co.uk/fiultra/...L34-SEntry.jpg More power to your arm, pal. Andre Jute Visit Jute on Amps at http://www.audio-talk.co.uk/fiultra/ "wonderfully well written and reasoned information for the tube audio constructor" John Broskie TubeCAD & GlassWare "an unbelievably comprehensive web site containing vital gems of wisdom" Stuart Perry Hi-Fi News & Record Review- Hide quoted text - - Show quoted text - Hi RATs! Yes, trying to make it loud using the amplifier is just another way to waste as much time and money as is available Power output is measured using a steady signal, either Sin wave or white noise. A constant signal allows accurate measurement. Music is, at least in the olden times, was, not a constant signal. This is where the two major politcal parties of the audio arena diverge. Do we want accurate information or beautiful Music. Both sides assume they know the truth. We will never know the truth. We are human, not smart My EL34 amp was UL, factory. It is now triode, with a diode and an R between Plate and Screen. The Z of the OPT is now much greater than optimal for max power output. It does sound really good Hi Al, What ya hiding here with this business of a DIODE plus screen stopper resistor between anode and screen??? Just wtf does the diode actually do, in your own words, in your own time? Patrick Turner. And the classic EL34/6CA7 has been replaced by 6BQ6-GTB, further reducing power output. Oh, the horror 8*P It does sound really, really good. None of us knows everything, but, some of us just do whatever sounds "nice". Life ain't a Force March for everyone, some of us Samba. Ole! Happy Ears! Al- Hide quoted text - - Show quoted text - Yeah, I wondered about Al's wildly placed (artistic?) diode, then decided to say nothing. Who knows, April Fool's Day may come early in Tube Garden Time. Hell, hi-fi is so wild and wonderful, Al might actually have discovered The One True Faith. However that may be, I was going to leave it to you or John to be the first to say anything -- and perhaps look like curmudgeons when the Nobel Prize Committee calls at La Casa Marcy... Or maybe that will be the I. G. Noble Prize Committee. Has it caught fire yet, Al? Andre Jute A little inaccuracy sometimes saves tons of explanation. --H.H.Munro ("Saki")(1870-1916) Visit Jute on Amps at http://members.lycos.co.uk/fiultra/ "wonderfully well written and reasoned information for the tube audio constructor" John Broskie TubeCAD & GlassWare "an unbelievably comprehensive web site containing vital gems of wisdom" Stuart Perry Hi-Fi News & Record Review |
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#8
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
Hi Patrick
Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. Yeah, and most winders wholeheartily will agree that 43% percent is ideal because it is just the end of the 4th winding block of a 7-way interleaved design (means 14-way interleave for PP), hence easily to manufacture. Same with 50%, 40%, 33% and 25% (depending on number of interleaves). So much on "magic UL% numbers", honi soit qui mal y pense (I don't mean you personally). Regards, Tom Schlangen |
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#9
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Apr 2, 7:20*am, Tom Schlangen wrote:
Hi Patrick Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. Yeah, and most winders wholeheartily will agree that 43% percent is ideal because it is just the end of the 4th winding block of a 7-way interleaved design (means 14-way interleave for PP), hence easily to manufacture. Same with 50%, 40%, 33% and 25% (depending on number of interleaves). So much on "magic UL% numbers", honi soit qui mal y pense (I don't mean you personally). Regards, Tom Schlangen Well I agree entirely that recipes for UL OPTs had the primary = 14 layers and you could then build up the bobbin from its bottom with 4P layers, one secondary section, 3P layers, CT, 3P layers, secondary section, 4P layers. This gave a PSPSP interleaving pattern. Designs like this were publicised and analysed in Wireless World in the 1950s. And why such crap was analysed and considered fit for audiophiles I don't know. But it turns out that if you draw a graph of Ra vs UL tap %, then you'll find a rapidly falling Ra until about 43% and then gradual additional reduction of Ra until you get to 100% UL which is triode connected. So the 43% was at the knee of a curve. It worked well considering that peple wanted some reasonably high gain because most designs incorporated GNFB of up to 30dB in many cases. Remember the days when there were wars over who could get the lowest distortion figures like say 0.03% at 1dB below clipping? A Williamson triode amp gave 1% at near clipping without GNFB. With 20db GNfB this 1% reduces to 0.1%, and with 30dB it would be 0.03%, and one has to have a very wide BW OPT to get this and understand how to apply phase tweaking circuits to make the amp stable unconditionally. Makers now don't use wide band OPTs and they know **** all about "critical damping". Past arts have been forgotten. If you read RDH4 on the comparison of 3 watts from a 2A3 or from a 6F6, the harmonics production of the 6F6 is utterly appalling compared to the triode. The UL does a lot to reduce the crap. But I like more than 43%. In class A circuits where the load line is near horizontal and one does not need to make the Ea min swing down much more than it does with triode in class A1. But its useful if you can get the extra swing. And you don't need to move the screen tap very far away from the anode to get the extra swing, and with say taps at 60% to 75% the tube behaves very much like a triode with very little 3H and other higher H. Its not a problem if the gain is low with EL34. Even triode gain is OK. 6550 also give very near full tetrode power when using 60% screen taps. Manley Labs have EL34 with 25% UL and Ea = Eg2 = 550V. I don't know why they bother with only 25%. But then they try to squeeze many watts as possible; it is good for sales but not so hot for fidelity or reliability. Patrick Turner. |
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#10
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
Tom wrote:
Most ppl think the UL connection for EL34 always means 43% screen taps. This % was always regarded as optimal because triode like THD is achieved and Rout reduced to give Rout = RL. But this was mainly for class AB PP amps. Yeah, and most winders wholeheartily will agree that 43% percent is ideal because it is just the end of the 4th winding block of a 7-way interleaved design (means 14-way interleave for PP), hence easily to manufacture. Same with 50%, 40%, 33% and 25% (depending on number of interleaves). So much on "magic UL% numbers", honi soit qui mal y pense (I don't mean you personally). As originally coined, the term "ultralinear" applies to an optimum. If it isn't at that optimum ratio, it isn't UL. So it seems to me, anyway. Patrick's imaginary "most people" are possibly quite right. "25% screen tap" is a clearer and more accurate description than "25% UL", and isn't much harder to write. Thing is, if we conspire to trash the meaning of "ultralinear", then we lose an important distinction in our language, and get nothing in return, just because some folk think that jargon adds grandeur to their tedium. More gain allows more feedback. Other than UL, where you put your screen tap is Hobson's Choice when it comes to final THD, surely? However, it could be that, if you chose a particular harmonic, or blend of harmonics, rather than THD, you might find a different optimum power/distortion ratio at some different screen tap ratio. That might be a bit interesting. UL(3H+5H) might be a good idea. Al's getting dafter, incidentally. Al, wake up! Everyone needs power. Roughly in proportion to room size, speaker technology, and the number of friends you've got. So wrote I. Yearning for the glory days of plain text. |
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#11
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Apr 2, 11:55*am, "Ian Iveson"
wrote: Al's getting dafter, incidentally. Al, wake up! Everyone needs power. Roughly in proportion to room size, speaker technology, and the number of friends you've got. So wrote I. Yearning for the glory days of plain text.- Hide quoted text - - Show quoted text - Hi RATs! My speakers are about 95dB/W/M. My room is 12'x16'x8'. Friends? Not many that visit, often. I have been in bed for over twelve years Yes, the Teletype was upper case only. Lower case was the thin edge of the wedge... Sigh. Happy Ears! Al |
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#12
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
Al wrote:
My speakers are about 95dB/W/M. My room is 12'x16'x8'. Friends? Not many that visit, often. I have been in bed for over twelve years I prescribe at least 600W, Al, with midi keyboard, synths, plenty FX, and a sequencer on your 'puter. Take a walk on the wild side. Yes, the Teletype was upper case only. Lower case was the thin edge of the wedge... Quite. I knew where I was then, AFAIR. Sigh. Alas...and we had the world at its prime. My newsreader used to put those chevrons in all by itself. **** knows where history is taking us now. Ian |
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#13
Posted to rec.audio.tubes
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Utralinear SE amps with EL34/6CA7.
On Apr 2, 1:18�pm, "Ian Iveson"
wrote: Al wrote: My speakers are about 95dB/W/M. My room is 12'x16'x8'. Friends? Not many that visit, often. I have been in bed for over twelve years I prescribe at least 600W, Al, with midi keyboard, synths, plenty FX, and a sequencer on your 'puter. Take a walk on the wild side. Yes, the Teletype was upper case only. Lower case was the thin edge of the wedge... Quite. I knew where I was then, AFAIR. Sigh. Alas...and we had the world at its prime. My newsreader used to put those chevrons in all by itself. **** knows where history is taking us now. Ian History brought and brings us here and now. We get old and everybody else runs around like there is a fire, somewhere The world is OK, but, the Internet is in a snit, for the fun of it? Al |
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