dpop
Responses from dpop
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm Looking at that above linked picture, I can now see (rather clearly) what the little silver screw on the back does. As you mentioned Filip, it supports a shield - a shield that isolates the audio portion of the EAR, from the power supply p... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? It sure looks like the resistor is in place on *this* particular unit: picture of resistor | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm Unfortunately, I don't have the engineering and design knowledge that's required to explain why that's in the circuit. Looking at the resistor, at this point in time, if you wanted to re-insert it back into the circuit, it's going to be im... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm Thanks for the reply Filip. Looking at the pictures you have provided so far proves to me that the chasis is *not* floating (from earth ground), as I can see the green earth ground wire is soldered directly to the rear panel banana standof... | |
| Using battery power to go off the City's power grid Since I'm more familiar with the UPS world, from experience, standard UPS' (themselves) will give off a mechanical hum, and most always a fan will kick on, when a loss of power is detected and they are called for action. but I've never heard any m... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @oldrooney ...but has the problem really been resolved? We haven't heard from @filipm for a few days now. | |
| Using battery power to go off the City's power grid @curiousjim Mechanical hum or audio hum? | |
| Using battery power to go off the City's power grid @curiousjim You may not be speaking to me directly, but just out of curiosity, are you referring to mechanical clicks, or audio clicks? | |
| Using battery power to go off the City's power grid This is just one example of a Battery Room at a Data Center (ie, computer farm). These batteries are for mission critical UPS power. Typical UPS Battery Room at a Data Center | |
| Using battery power to go off the City's power grid @sbayne Oh that should be fun! I think I'll do that! Thanks for the suggestion! Is there a limit to how many pictures can be posted? | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @ejb14 Hmmm, you just made me think of something. It's possible the chasis is floating (no earth ground connection). Filip, do you see that little silver philips screw on the back panel with the bonding washer (washer with ridges which digs into t... | |
| Using battery power to go off the City's power grid >>>All of my home audio equipment (TV's too) has been on a double-conversion UPS for years now.<<< Correction, my power hungry power amplifiers are surge protected, but not on the UPS. Only the low wattage consuming front end ge... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm I'm looking at one version of the schematic on line... https://rockgrotto.proboards.com/thread/11529/ear-834p-phono-stage-mods ...and it looks like the earth ground (e) is actually part of the audio circuit. Wow, I've never seen anything... | |
| Using battery power to go off the City's power grid Many audiophiles (myself included) consistently focus on earth grounds, grounding, and "clean" power. Yes, that's important, to maintain low noise floors (as earth grounds can also act as bonding conductors, which is also good), but what many time... | |
| Using battery power to go off the City's power grid Here's another picture of the Fluke 43B: Fluke 43B |