john_tracy
Responses from john_tracy
| Cary or Conrad Johnson phono preamp? Or the new K&K Trio if the Maxed Out is out of your budget range. | |
| Zany measurements and theories Pressure is force/unit of area. For a phono stylus the force is small but the contact area is very, very small. Result, high pressure.For another example,consider ice skates. Ice occupies more volume that liquid water, hence high pressure lowers t... | |
| diy tube amplifier kit How much output power do you require? | |
| Eliminating hum In reference to amps with a resistor between the circuit ground and chassis ground (usually with a parallel film cap to AC ground the circuit to the chassis), that resistor can be replaced with a inrush thermistor. That way the desired DC impedanc... | |
| Going old school God knows that I am no expert on this subject, but it is my understanding that you will want a mono cart. with a spherical profile stylus and a phono pre that has the many different equalization curves used during the 78rpm era and a good and adju... | |
| Do wooden arms warp You are going to have to make many assumptions to do this calculation. First the heat Q being dumped into the diamond stylus is at the same time being dissipated by the stylus assembly to its surroundings. This will involve the temp. difference be... | |
| Nottingham Ace Spacedeck Tweaks If you do decide to go for a PS unit, instead of the Wave Mechanic I would suggest the new PS from K&K Audio. It will require rewiring of the motor pod but that is relatively simple. This PS supply has separate outputs for each of the two fiel... | |
| LCR phono stages we know about Lewm, the bypass cap is only necessary for the single ended version. The differential LTP version of course does not need a bypass for the cathode CCS as the signal passes from cathode to cathode directly. I have a complete schematic for the beta ... | |
| LCR phono stages we know about You need a cathode bypass cap for the same reason you need one in an ordinary single ended triode circuit. The tube for the sake of analysis can be viewed as an AC signal generator whose output is Eg*u were Eg is the signal voltage presented to th... | |
| LCR phono stages we know about Yes you can have a LTP differential stage with a current source tail and current source plate loads. I have one. The trick is the shunt resistor. It bleeds excess current from the plate load CCS to ground and establishes the plate voltage at the s... | |
| LCR phono stages we know about If you load the input stage cascode with an active current source you can effectively achieve an infinite output impedance. This allows you switch the RIAA series resistor from a series connection to a shunt connection. No issue with RIAA response... | |
| LCR phono stages we know about " is that it places only an inductor in series with the system, which has very low DC resistance compared to the resistor MANDATED in RC type RIAA "My point in posting was to highlight the fact that not all RC RIAA implementations require that hig... | |
| LCR phono stages we know about Not all RC RIAA phono pre's place a large value resistor in series with the signal. I have a fully differential phono pre designed by Kevin Carter of K&K Audio that does not. The large value resistors (and caps for that matter) are all shunt c... | |
| Any step up transformers recommendations for MC's Kevin Carter @K&K Audio has a very nice kit which uses Lundahl transformers. Several options here. I would contact Kevin with your needs and he will be able to tailor a kit to fit your gain and loading requirements. | |
| Zesto vs K & K phono stages Vortrex, if your K&K phono experience is circa 2011, then no, it's not the latest design. The last three years have seen more that one upgrade. |