gs5556
Responses from gs5556
| Help needed with Rattle in my floorstanding speakers. Without knowing what speaker it is, I would suggest removing the grilles (if any) before going further. Some grille frames are steel or aluminum and may very well cause an audible rattle if not secured against the speaker or if the frame came loos... | |
| Is this describing a blown tube, or two blow tubes? From what you describe I would say it's a typical tube failure if you did not have any problems with the old tubes. Unfortunately, tube infant mortality is quite common as tube factories do not have the greatest quality control, which is why the b... | |
| How much hum is normal from a new tube amp Mechanical hum is mostly from a poor grounding layout. Sometimes it's caused by heater wiring and sometimes by bad transformer construction. I have solved a couple of tube amp buzzing problems by simply moving wires with a wooden chopstick. You sh... | |
| Stupid class A question Most likely yes. Class A amps produce heat regardless if a signal is passing through and in many cases the current (and heat) at idle is greater than the full volume current going to the speakers. | |
| Mark Levinson Repairs Whoever you spoke to gave you bad information. ML has three authorized service centers: Pyramid Audio (TX), United Radio (NY) and Technetron (NYC). All of them have the schematics for your amp. I would first contact Pyramid, their owner was a tec... | |
| Levinsos 585.5 No Power Out. - Assistance? Those relays should only engage when entering standby mode. If you turn on the amp and the relays click without going into standby, there’s a problem. You can also try disabling [Auto Off]. Then turn off the power and start it up again. If this f... | |
| Levinsos 585.5 No Power Out. - Assistance? That clicking on startup is most likely the speaker relay engaging and cutting power to the speakers. Usually there are two ways that relay is powered: through the standby circuit and the thermal overload protection circuit. My guess is there is a... | |
| Levinsos 585.5 No Power Out. - Assistance? Is the power light steady (ready to play) or flashing (standby mode)? Did you download the manual and go through the all the menu functions? Those new Levinsons have nested menus and there are a lot of parameters that can mute or attenuate volum... | |
| Low Powered Tube Amp Distorting High Efficiency Speakers? Before starting any troubleshooting process with tubed gear, it's always a good idea to substitute new tubes first (or a stash that you know works). It's an expensive undertaking but unfortunately even new tubes can be defective or out of spec rig... | |
| Chicken or egg question Connect the No.23 that does not work to the working RCA outputs at the preamp. The RCA inputs to the 23 are connected to the non-inverting (pin 2) XLR. If it still doesn't work then the amp is at fault. Since the No.23 has two discreet circuit in... | |
| Looking for an Amp Replacement This should be an exact match if the lead spacing matches: https://www.mouser.com/ProductDetail/WIMA/MKS4F034704C00JI00?qs=NW4srbNA5mel6gkPoAUV7Q%3D%3D | |
| Looking for an Amp Replacement The amplifier will work perfectly well with another brand of capacitor that has the same voltage rating and capacitance. I assume the cap you damaged is one of the Sprague silver cans. If the damaged cap is on the raised daughter board, it is clos... | |
| Amp power output in relation to impedance change Amplifiers do not put out power. They provide a voltage source, just like a wall outlet. The load (speaker, resistor, arc welder, whatever) draws current from the voltage source and if the source can maintain voltage the load will consume the powe... | |
| An analogue preamp designer question Without a test printout of frequency response, signal-to-noise ratio, THD+N and one channel un-driven crosstalk measurements, it would be difficult to gauge the price to performance value. You have to know what your competitors are capable of at a... | |
| it is fake or real transiator? I don't see why anyone would fake them. They are available everywhere for about $1.00 and about $0.70 each when purchased in quantity. Both STmicro and Multicomp manufacture them. |