Recent content by mlucitt

My research indicated that electrolytic capacitors have a lifespan of 25-30 years. Less if high heat or high stress environments. They should be reformed (working voltage, or a bit less but not maximum voltage, brought up slowly and held for 24 hours) if idle for more than a year for longest life.

From the Caig Laboratories website: DeoxIT F5 - 5% DeoxIT® Fader (active ingredient), 75% odorless mineral spirits (carrier solvent), 20% propellant. Spray provides flushing action. $28.00 for 5 oz. DeoxIT F100L - 100% DeoxIT® Fader, no solvents. Not sure if faders have plastic and/or metal...

The ALPS potentiometers are probably some of the best in the audio world. Typically very accurate and reliable. I would reflow all the solder junctions related to the audio signal (volume pot, balance, tone controls, RCA jacks, etc.). The fact that the problem occurs in only one channel points...

The 100K stepped attenuator (Level Control, Volume Knob) is in parallel with a 10K (Phase Linear) or 39K (White Oak Audio) pull down resistors. Using Ohms Law, we can see the input resistance (impedance is frequency driven) of the PL400 is 9.999 Ohms (Phase Linear) or 28K (White Oak Audio). In...

If Lee sold all his spare parts for $1.00, he would be a millionaire.

Translation - No chemicals, the switch has been opened and I am therefore against it in this case.

My upgraded PL2000 Preamplifier signal output comes right off the output of a Texas Instruments/Burr Brown "SoundPlus" OPA2134 SMT OPAMP (formerly RCA 4136) via a BrownDog adapter P/N 060601 and through a Panasonic 22uF/63V DC Blocking Capacitor in each channel. There is no pulldown resistor. I...

If you could duplicate an original Phase Linear solid knob, you would have quite a following here on this forum. Personally, I think it is too much work. There is a very similar knob available from RS PRO https://us.rs-online.com/product/rs-pro/499961/70639231/ The P/N is 499961 and the price is...

We are a friendly and generous group... Eric, I thought you twisted your Bias Transistor Wires, but these look braided!

The issue with the original Sockets is the steel spring clips for the Transistor Pins. They are weakened by insertion and removal as well as heat cycles. You can attempt to squeeze them together with needle nose pliers, but that is a temporary fix. Those sockets were the best solution available...

That's him...

I can send Tony to break his knees if he reneges...

245 Miles from me. 7 hours round trip. I could do a road trip if you are buying breakfast and lunch.

We need more details for the obituary... Tweeter type - Tweeter Manufacturer - Tweeter Impedance - Tweeter Frequency Bandwidth - Crossover Frequency - Amplifier Responsible for the Loss - Band Involved - Song Involved - Were You Sitting or Standing - We are a curious group.