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... I am aware of the characteristic transfer curves for both valves bjts and FETs , but my point is that under no situation should the amplifier be getting into regions where this type of distortion, irrespective of the technology should occur. Whatever distortions and sound modifications...

... Great minds ....And all that

Good, I suspect now that your problem is that that the 129 c component has failed open circuit . The following is an educated guess . There is a white material under it an onto the black semiconductors rectangles below. I suspect that this is or was heat conducting compound. That component...

... Exactly my point... Except for the "looks easy" bit where you have an experience I lack.

.. by no resistance do you mean 0ohm or infinite ohms . 0 ohm would be the correct value. And sorry but my right and your right might be different, are you referring to the red lead closer to the edge of the board, which looks slightly thinner and more worn as the input wire , or is it the...

.. why should valves sound warmer ,? is it because you like their distortion?. Any amplifier should have no distortion. As a recording engineer/ artist you have every right to use any instrument , technology to create the sound you want.That would include any distorting devices etc But once...

... In some of my recent reading another culprit has been identified. .. the mixing desk engineer. The arguement is was that one of the limitations of vinyl is that low frequency high volume sounds have to be attenuated, as the excursions of the stylus will be excessive. The RIAA curve...

Is the middle red wire the input from the charger? If so it should be connecting with the device c139 which looks to me as if it is a thermal fuse link and possibly defective. .. there should be zero ohms resistance accross it

... Every communication system has limitations, in analogue ones it is the noise floor, frequency and phase responses , interference from and into cables etc. In digital ones it is jitter, quantisation error and bit rate limitations. Provided interference is below a specific level, the...

... Wow I knew that I was opening a can of worms. How logical is it to argue that imperfections in a storage and transmission medium yields a superior result than when the majority of these imperfections are removed?. If the words hi fidelity are to mean anything , then fidelity to the original...

Well said. Look at the actual distance Between Alaska and Russia and with two islands between. Imagine a hyperloop from China via Europe Russia to America ...

.. the perpetrator was UK born 52 years ago?

... I'll agree with the each to his own. After that we must part company. 1. The revival of vinyl records has constantly puzzled me. Why anyone would want to return it a world of rumble, tracking errors , hum, wow and flutter , limited dynamic range, limited stereo separation, limited duration...

I am reluctant to call any person a terrorist. It doesn't advance any argument, in fact it successfully negates any discussion. Label someone a terrorist and one need not engage any further. It is as meaningless as the phrase " war on terror" if war is not terror , then what is? A colleague of...

... Well it was a 2500watt motor, with presumably a suitable sized chain.

... When I worked in the product engineering department of a medical devices company the QA people were our worst enemy, . They would never let anything go. Sounds to me like you would have been one of them ... Incidentally take that as a compliment. Evan after all these years I recall one of...

... D8VEH, have you not been warned about that type of behaviour before?, Seeking to replace opinions with facts. It just will not do... For my part, I would have considered a bike of that type as a very expensive luxury item, and would not have confined it to a shed, I would have demanded...

.. well even that tells us something. I have no detailed knowledge of the Kalkoff charger so these questions are exploratory .How many pins or connections does it have with the battery. It needs to. Have a minimum of 2 This question is to find out whether they're is a protection circuit...

.. well they do the sequence is 0 3.5, 7.2,10.8,14.4,18.0,21.7 and 25.3 indicating that each voltage is 3.5 to 3.6 V higher than the preceding one. Are these supposed to be lithium ion cells and a total supply voltage of 26 V 29 V nominal? If so they are at the lower level of discharge and...