poulkirk313e
Responses from poulkirk313e
| Damping Factor Damping Factor is directly related to Amplifier Output Impedance. It is not possible to make an acceptable Solid State Amplifier without providing negative feedback. It is however possible to make a reasonably good Valve or Tube Amplifier without ... | |
| Tube selection Dekay. We are based in Australia, so it is probably not practical to recommend our Tube Amp. I will be happy to email you some details on it in PDF format if you provide me with your email address. I can show you the basic Amplifier Circuit, No Co... | |
| Tube selection As a designer of Professional Broadcast Audio Equipment, I am surprised about the discussions about Tube Sound. The characteristics of individual Tubes and Transistors of the same type vary by a very considerable margin. In good design, it is not ... | |
| What is the Sound of Impedence Mismatch? In the Recording and Broadcast Industry, virtually all Audio Wiring is balanced, it is normal practice for Studio Equipment to have an Output Amplifier (Line Amplifier) with a low output impedance, say about 50 Ohms. This amplifier is generally no... | |
| Input Impedance Measurement Generally equipment such as amplifiers have a high, non specified input impedance, commonly known as a bridging input. Input impedances range generally from 10 K Ohms to 100 K Ohms. This is generally done to allow you to parallel connect several a... | |
| Fast Amplifier I must admit to placing a bit of a teaser re my question about "Fast Amplifier" I have always felt, and demonstrated by this by listening tests that an amplifier where the bandwidth of the input signal is deliberately limited by a simple two stage... | |
| Ohm Loads for cartridges The theory of playback of Vynyl LP recordings is well documented in several professional publications. it is in fact quite complicated. I will try to explain it in simple terms. Fitst, the frequency response on the recording is done to the RIAA re... | |
| input impedance Joegio. Generally, the input impedance of a piece of audio eauipment is not important, as long as it is higher than the minimum recommended load impedance of the piece of equipment feeding the signal to it. Most CD players for example have an outp... | |
| Mismatched power tubes sound? Bob. Not to worry about permanent effects of output transformer magnetization. Quality output transformars are made from fairly soft iron, and does not permanently magnetize, and if they did, driving the amplifier hard would soon demagnetize them ... | |
| Analog or Digital volume Alps make an excellent Conductive Plastic tracked Audio Potentiometer. Penny anf Giles in the UK also makes such a device, but very expensive. You could probably not get anything better than this. Digitally controlled stepped attenuators, or pure ... | |
| Mismatched power tubes sound? Matched Output Tubes, are Mandatory for good results in serious Tube Power Amplifiers. Individual Bias adjustment for each tube is also mandatory to allow the cathode current of each tube to be the same value. This prevents magnetisation of the ou... | |
| Matching pre amp tubes? To buy an argument. Why even consider tubes in a Pre-Amp, as Solid State devices work so much better in low level applications, lower Noise and Distortion, no Hum and no problems with Microphony. I firmly believe that tubes are superior to Solid S... | |
| XLR (Balance) Cable Balanced audio circuits rejects common mode noise such as Hum etc, The quality of cable is not particularly critical, and it is possible to transmit an audio signal for many miles using ordinary unshielded telephone cable. Cabling used in Radio St... | |
| SAE X25 Class A Amplifier Circuit Murphy_t. Any suggestions, the SAE X25A is the only high powered class A amplifier we have available, the valve amplifier is noticeable better in bringing out subtle low level details than any class AB Solid State amplifier we have tested so far. ... | |
| Question on tube noises We have an SAE X100 Class A Solid State Amplifier which have been "Butchered" by an inept repairman. We would like to restore this amplifier for use as a reference unit. Does anybody have a manual available for this make and model to help in the r... |