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| bruce2bowser@gmail.com: Jan 06 06:43AM -0800 Costs won't exceed 8 years on average, no matter how you look at it. End of story. |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Jan 06 06:53AM -0800 > Costs won't exceed 8 years on average, no matter how you look at it. End of story. Vos non potestis figere stultus. Invicta est ignorantia, et addere illud aggregatum mortiferum. Peter Wieck Melrose Park, PA |
| Chuck <ch@dejanews.net>: Jan 05 11:29AM -0600 On Sun, 5 Jan 2020 15:37:08 +1100, Trevor Wilson >**I Would sincerely hope that no reputable amplifier manufacturer (tube >or SS) would try to build an amp that sounds as bad as either. Both have >serious measurable and audible flaws. The 500A also had heat related drifting cap values in the MPX circuit which caused intermittent stereo reception . |
| Trevor Wilson <trevor@rageaudio.com.au>: Jan 06 06:35AM +1100 On 6/01/2020 4:29 am, Chuck wrote: >> serious measurable and audible flaws. > The 500A also had heat related drifting cap values in the MPX circuit > which caused intermittent stereo reception . **That type of fault can afflict any analogue receiver. SS or tube. -- Trevor Wilson www.rageaudio.com.au |
| Ed.Vance@f10.n1.z4470.fidonet.org (Ed Vance): Jan 05 09:12PM +1200 01-04-20 02:35 John-Del wrote to Ed Vance about Re: More about that Chine Howdy! John-Del, -snip- > When I (even) see a advertisement for a Semiconductor Audio Amp I always > think why did a Square Wave sound so bad back then but doesn't in the gear > sold now. Jo> Not sure of your point but if you used a diode of any construction Jo> including a vaccuum tube diode, you would have heard the same Jo> distortion. I have always thought a Audio Sinewave going through a Transistor would come out as a Squarewave, not a Sinewave. To my way of thinking a Sinewave is Pure Audio, a Squarewave would make the signal sound distorted (a bit?). Does it happen as I imagine, or am I way off base. I never seen the pattern of the output on an oscilloscope so I don't really know. 73 de Ed W9ODR ... There is always one more thing for Me to learn... |
| Ralph Mowery <rmowery28146@earthlink.net>: Jan 05 11:32PM -0500 In article <578283240@f10.n1.z4470.fidonet.org>, Ed.Vance@f10.n1.z4470.fidonet.org says... > Does it happen as I imagine, or am I way off base. > I never seen the pattern of the output on an oscilloscope so I don't really > know. It all depends on the circuit. If just fed in to a transistor the output would be a square wave, more or less. YOu use resistors to bias a transistor in to a linear type amplifier if you want the output wave form to be the same as the input except larger. It will usually be inverted depending on how you make the circuit. Look up class A, Class B and Class C amplifiers. The class A is linear , class B (in audio amplifiers) usually has 2 trasistors in push pull so the wavefor will not be distorted. The class C amp looks like a bunch of pulses if biased far enough. The class B will be distorted if the transistors are not in push pull. The class C will really be distorted. Given equal quality amps, the tubes will be driven into saturation on very strong signals slightly different than the solid state ones usually. I have such a tin ear that I doubt I could tell the difference in a $ 100 system and a $ 10,000 system. There have been some studies that people with very good ears can tell the difference the insturments could not detect back in the late 1960s. |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Jan 06 05:20AM -0800 Vos non potestis figere stultus. Invicta est ignorantia, et addere illud aggregatum mortiferum. |
| Fox's Mercantile <jdangus@att.net>: Jan 06 07:43AM -0600 > Vos non potestis figere stultus. You can't fix stupid, but a shot of WD-40 in the mouth will quiet it down. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
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