lewm
Responses from lewm
| Cartridge Loading.....Part II Using the ZYX Universe, which has an output of 0.24mV and an internal R of 4 ohms, the gain is as much as you’d want, at the 0db setting. So, if you estimate the current output of the ZYX as 0.24mV/4 ohms or ~60uA (micro-amps), it would seem that ... | |
| Thoughts on the Linn LP12 turntable Pani, I hadn’t heard of the Ginga, so your comment led me to look it up. Its design concept channels Mikro Seiki, if MS had been allowed to evolve for a decade or two. The TTs you like by and large could not be more different from the LP12. | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? Although I don’t recommend tube rolling in order to improve sound quality, in this case it might be worthwhile to change all the tubes in the unit. It could be that one or more tubes is defective, thereby enhancing susceptibility to the noise. Eve... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? I give up. | |
| Added an SUT...not sure I understood this Vinylzone, I think you’re correct about the labeling of the SUT inputs, but in this case the best choice is the 40 ohm inputs despite the fact that 12 ohms ( the internal R of the cartridge) is closer to 3 than to 40. That labeling custom can be v... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? This is not an inherent fault of the 834P. Shorting the unused inputs is a good idea. | |
| Added an SUT...not sure I understood this Please omit “gel reader “ from my last post. I have no idea where that came from. Should read “47K or higher” load resistor. Nearly all MM phono stages use 47K standard. | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? Aluminum foil is fine for identifying the source of radiation but if it works you’ll need a more practical long term solution, like possibly tube shields or other. | |
| Added an SUT...not sure I understood this Raul makes a good point, but if you’re determined to use a SUT then you must use a low gain phono stage (40 to <50db) with a 47K or gel reader load resistor. | |
| Talking about service! I had a problem with a Grace Ruby that was re-tipped by SS with an OCL stylus. It just did not sound right. Peter invited me to return it, found the problem, which was due to an error in their work, fixed it, and had it back to me within a week ... | |
| Added an SUT...not sure I understood this What mulveling said. There is only one correct way to terminate the SUT, with a 47K ohm load (or higher in some rare cases for special reasons) across the secondaries and input to an MM phono stage. With a SUT that has a 1:10 turns ratio (like y... | |
| Cartridge Loading.....Part II Don’t have a formed opinion yet. | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? When you squeeze them, you create a ground via your body. I have a table radio in my kitchen. It reacts to the lighting over our sink, which is on the same circuit, and also to a Canary detector plugged into the same outlet. If I hold the radio an... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? There is no need to buy tube shields from eBay. There are several reputable vendors in the US who sell them, and will probably help you out with installation. One business is tubes and more. Another business is antique electronics in Arizona. Sure... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? Tube shields might help but only vs airborne RFI or EMI. I doubt tube rolling is going to help. SS devices are as susceptible to this problem as tube devices, possibly more so because of wider bandwidth. Can your phono really be powered by a 12... |