Video #2 in the HL Complete Build Series, found on YouTube. This time I am showing my EDS 88A Capacitor Tester build. This one runs a bit under an hour in length. Soldering well over a hundred pad locations in this one!
Update: Adding THD Measurements to my Capacitors | S. Groner Linear Audio XII
A look at the design process for the upcoming HL THD Tester for capacitors. I will be using SPDT or SPST switches to allow a variety of capacitances. Resolution depends on quality of reference arm, but measuring down -160dB, is easily achieved.
New Hardware Day: “AF5FV Octopus” I/V Curve Tracer
A preview into the new Hallman Labs curve tracer. A review will be done at some point.
ESD FAQ: “Is it Okay To Plug Yourself Directly Into the Ground of an Outlet?”
ESD FAQ and common misconceptions about electrostatic discharges.
Potomac AA-51 Audio Analyzer – Calibration Procedure, Service Manual, Ref Images — Early Version of Upcoming Page (Work in Progress)
A look at the Potomac AA-51 Audio Analyzer: schematic, calibration procedures, service manual and more inside. Produced in the 1980’s, the AA-51 is still of great use.
XMOS : BlackGate vs. SILMIC ARS “Super Gold” Capacitors (& Others) Direct Comparison (testing in progress) – Photos and a Preview
Preview into the head-to-head between Black Gate and SILMIC ARS Super Gold. XMOS module based on the SU-1 is being used. This is still a WIP.
Last Chance to Enter Burson Play DAC/Amp Giveaway!
Just a reminder to anyone who has yet to sign up for the first Hallman Labs (review equipment) giveaway, the entry period ends at 12AM PST. You can find all the details in this post. All that is required to enter is to follow this website (from the main page, button on the right side […]
Testing 500x Microscope out on 1000V Sprague (K631788-14) Capacitor (folded/rolled design)
Don’t see this very often, even in classes they didn’t have one of these that had cracked the wax. First two pictures are with a 50mm lens. I noticed the wax had broken in a circle around the end and if I could pull the end right off, the solder was already broken and […]
Preview of Hardware Reviews in Progress with sAp-10 – Balanced Headphone Amp under $200 (also the Burson Play DAC/Amp)
Finally got a balanced (XLR in) headphone amp. 2.8 MHz is native DSD64 converted by DOP (DSD over PCM). This is a picture from my phone, but I wanted to get something for readers to see on the reviews in progress between this combo and the Burson Play DAC/Amp combo. I plan to focus more […]
High Res Photos of My New Sprague Tel-Ohmike TO-6A
Update – May 15, 2018: I have almost finished restoring the bottom of the unit (where most of the components are) and expect to have it working in the next week or less! Update – May 12, 2018: Here is the Schematic with the parts labeled, this way you can easily see where you are […]