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.
First off, let me apologize for the slight delay, as North Carolina is taking a pounding in lighting strikes right now and I lost power for a good bit there. However, we are back up and running and here is the winner of a ready to use Burson Play DAC/Amp! But first, a little about […]
Update 7/15/18: I just stumbled across by far the most detailed document I have ever seen on Black Gates™ and it is by Jelmax (the creators of the technology)! See the 107 page PDF here: Blackgate_Tech_Note_Compilation. Cable used between the FUN01’s Coax output and the Siglent SDS 1202X-E : […]
Six Rubycon Black Gate F capacitors are on the way for the FUN01 (SU-1 Clone). Stay tuned to find out how much of a difference they have over Nichicon’s MUSE series.
Photo guide on creating custom EL-8 cables using Moon Audio Blue Dragon and EL-8 connectors. All DIY components, non-assembled.
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 […]
Note: You can open all images displayed on Hallman Labs in a larger view by right clicking and then using whatever your browser says to view the image. This should open a new tab with the image in full size. I started an article on making custom I2S cables, but I never published how […]
I have been slowly working on this project behind the scenes, without posting about it much (aside from on ComputerAudiophile.com). This is a “discrete” delta-sigma digital to-analog converter (DAC) developed by Signalyst (although, this wasn’t made by them). Their goal was to be able to convert DSD signals (digital equivalent to SACD) into analog while […]
I was using my Cornell Dubilier BF-50 (vintage) capacitor analyzer with all of the right things showing on the “Magic Eye” 6E5 (Philips JAN (Mil-Spec)) electron tube’s eye for leakage, short, and open tests. By the way, the BF-50 uses a 12A7 (Tungsol) electron tube for both rectification of the AC input and amplification. Both […]
Well I currently have about 8 pages written of notes, thoughts on head to head Burson Play vs my custom ES9038Pro DAC. In the end it ended up being very close, which is why I was volume matching. One time I forgot to match the power amp back down and we got a […]