stuogawa
Responses from stuogawa
| Pure tube phono preamp I am using an all tube phono preamp...Scott Frankland's Wavestream Kinetics (the F in MFA) tube phone preamp, which then drives WaveStream Kinetics line stage tube preamp...to MFA 200Cs tube class A mono amps. This phono preamp uses 6DJ8 tubes, a... | |
| Living with unsolvable hum - Any audio detectives out there? Bingo.I have a ground loop problem....at the very end of the system chain and NOT caused by other equipment (the other gear were very good shiny object distractions).Performed systematic changes as previously described.As soon as I got to the D100... | |
| Living with unsolvable hum - Any audio detectives out there? Test 1:Pulled Audio Research D100A out of rack. Put amp into my garage workbench away from all RF devices. Plugged amp right into wall outlet. No donut between amp and wall outlet. Plugged speakers right into amp. Zero 60 hertz cycle. Amp is fi... | |
| Living with unsolvable hum - Any audio detectives out there? I left a message with Chris at https://www.kf7p.com/KF7P/Welcome.htmland will be chatting with him to see if he has any other customers that experienced similar challenges.I have as much interest as Montaldo to solve this similar issue.----For my ... | |
| Living with unsolvable hum - Any audio detectives out there? backtothe80s. "The fix was to properly ground the cable splitter at the point of ingress to my home."montaldo. "Earlier this year I even bought a star grounding component from Granite Audio and connected everything to it. Didn't work. After tryin... | |
| Living with unsolvable hum - Any audio detectives out there? wsrrsw "Did you try not using power conditioner?"montaldo "I'm using a Shunyata T6000 distributor (the hum existed prior to this, and the Shunyata didn't solve it" | |
| Living with unsolvable hum - Any audio detectives out there? oldears "You’re looking under the wrong rock:It is not an electrical hum problem, it is mechanical and coming from your preamp power supply. The S:N test of your preamp found no problem. You hear it next to your rack."montaldo "But I had my local ... | |
| Living with unsolvable hum - Any audio detectives out there? BIF suggested:"I reiterate my suggestions that you should send your preamp back to the factory for a thorough check-up. For all you know, a cap used to filter out low frequencies might be leaking."No push back on this idea..and expanding on your ... | |
| Living with unsolvable hum - Any audio detectives out there? No arguments with the specs and not operating at low frequencies (60 to 120 specifically); but at the same time THESE reduced man made noise in my stereo amp music environment. YMMV regardless of the Fair rite specs. More investigation on why, in ... | |
| Living with unsolvable hum - Any audio detectives out there? BTW, use the power extension cord technique (cheap and easy).. and use it with your Cardas...screw how much you paid for Cardas...go to home depot and get a 12 foot 12 guage extension and wind a donut. If this partially solves the problem...do y... | |
| Living with unsolvable hum - Any audio detectives out there? Not evil...I am just curious. ;) | |
| Living with unsolvable hum - Any audio detectives out there? Couple more thoughts and experiments:* I did a brief read on Shunyata and their power distributors. I might have missed it, but they did not call out specifically how their internal distributors actually work and corresponding components. It might... | |
| Living with unsolvable hum - Any audio detectives out there? Google photo link to some of my ferrite "donuts" https://photos.app.goo.gl/GPdtYtB66gNJPtP49The "donut" on the carpet with the black power cord picture is what I am experimenting with for the D100A amp.You may need to start hunting and unplugging ... | |
| Living with unsolvable hum - Any audio detectives out there? Hi Montaldo,You received good advice to "process of eliminate" the possible 60 hz hum and possible narrow this to the preamp.One of my other hobbies is amateur radio and after reading your trails, this reminded me of what I have been doing for my ... | |
| Bottleneck Headphone Amp Repair I built the Bottlehead Crack with the Speedball enhancement.First things first... low hanging fruit easy to test/solve toward more complicated troubleshooting approach:1. I am not sure about other non Bottlehead Crack amps, but it is well known th... |