gs5556
Responses from gs5556
| Willsenton R300 Circuit Design Issue Now I see what’s going on. First, the 6SL7 will be damaged with 400v because its max plate voltage is 300 volts. This is a simple common cathode amplifier. The 200K plate resistor and 400V B+ at 120 volts yields a plate current of about 1mA per s... | |
| Willsenton R300 Circuit Design Issue May I respectfully suggest that you do not turn on that amplifier until you are sure of what you did. The 1N5380B is not a diode, it’s a zener diode and its breakdown voltage is 120V. That means it either maintains 120 volts (regulator) or it dro... | |
| Thiel CS3.7 repair You'll get a lot help from the Thiel Owner's thread... | |
| Help-Looking for Service Manual for ML 23.5 The reason you probably can’t remove the copper bar is because it has two downward bends and connects the two smaller 1900uF regulator caps. Those caps are tough to get to and you’ll need a 5/16 hex box wrench to get the wires off (screwdriver won... | |
| Huge difference in sustain in a single string? Could me a manufacturing defect, try another one. If the issue remains, check the saddle to see if it moved from where it should be for proper intonation. Also check the nut to see if any gunk is at the bottom of the groove. | |
| 20amp v 15amp If the wall outlet is 15-amp 125V then you'll need either a 20 amp to 15 amp plug adapter or a one foot 20/15 power cord. Each are less than 10 dollars. But if you know how to replace a receptacle, then install a combo 15/20 amp 250V receptacle. ... | |
| Power cord - 5 ft vs 10 ft ? Theoretically, since all power cords have a resistance per foot, the ideal length would be as short as practical. If by 'performance' you mean as low of a voltage drop to the amp as possible. | |
| Need advice with clicking noise from my tube amp To narrow it down, I would try running an extension cord to another outlet (not on the audio circuit) and see if the problem repeats. | |
| AR Classic 60 Bias Confusion The tech most likely got it right with a bias of 32.5ma. Based on the manual, there is a plate voltage of 420V and a bias of -46 V. If the output transformer is between 4 and 6k ohms, then 65 ma is the correct bias for the 6550 tube as it operate... | |
| Dedicated power circuits Cutler Hammer is now Eaton, whose products are available everywhere. Use hospital grade outlets for your audio. These outlets have a tighter grip on the prongs of the power cord which is much more effective preventing noise from entering than what... | |
| How does a speaker blow out? Low powered amplifiers can clip when pushed to their upper power limit, which sends out DC to the speaker. DC current melts speaker driver voice coils. | |
| Power cord length Time aligned power? Filtering per unit of conductor length? What physics text books are on that dealer's shelf? | |
| Left RCA out on DAC not working My guess is the RCA jacks on the DAC are pcb mounted and the left jack's hot pin is not soldered (not the ground). The AECO plug is longer than the other RCA plugs and pushes the hot pin back onto the pad, making electrical contact. Board mounted... | |
| Power conditioner wire gauge? Serious issue And the wire gauge from the IEC inlet to the power supply is at most 14ga and is usually 16 or 18ga. Not to mention the fuse element is equivalent to a 20ga solid conductor. I use 10/3 Romex for one reason only: the conductors are pre-twisted in ... | |
| Resistors in Parallel It's not a problem. I've paralleled resistors to dial in a specific ohm value that is not standard. If you really want to dive deep into the weeds there is the wire inductance in the paralleled resistor leads which can be a lot higher than the ind... |