lewm
Responses from lewm
| 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... | |
| Solid state or Tubes preamp phono stage. Soko, I’m sorry but your summary dismissal of tube phono stages and those who prefer them is ridiculous. One could as well say exactly the same about solid state and those who love it, and be just as pointless. And the parting shot about running h... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? I wouldn’t waste money on new tubes. However if the 834 does not already have tube shields I would look into purchasing some aftermarket cylindrical shields designed to block EMI and RFI. Place one over each tube. Well designed ones also improve c... | |
| Cartridge Loading.....Part II I have two complete systems in two different listening areas in my house. The Steelhead runs a system in my basement based on Beveridge 2SW speakers driven by Beveridge direct-drive amplifiers. The Beveridge outboard woofer system is long gone; I ... |