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!
A look at the improvements provided by upgrading the ES9038 DAC. FFT images are shown with an SDS1202X-E 200Mhz scope.
I also included a comparison of FIR filter responses
ESD FAQ and common misconceptions about electrostatic discharges.
I am sure that some readers have heard all the fuss around AMD’s new CPU. Of course, I am talking about the 16 core – 32 thread, Ryzen 9 3950X CPU. These were extremely hard to locate (especially at, or near, the MSRP of $750) First, I pre-ordered a 3950X with CDW, to ensure that […]
How to Video on Converting SMD components to Full-Size. Op-amp and capacitors upgrades are shown.
InYourEar Review is now ready! Click here for the “InYourEar” review. Stay tuned for the SMD op-amp to DIP-8 modification for the SMSL sAp-10 amplifier (with how to video). I’ll also be converting SMD capacitors to full-size in this upcoming article. As always, thanks for reading Hallman Labs!
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.
“In 20 years of tube collecting and tube selling, this is the FIRST real Bugle Boy 7308 I have ever seen! It appears your tube was originally imported into Canada, as it has HOLLAND etched into the glass at the top. This was standard for all Philips/Amperex tubes that were imported or sold in Canada. It is just possible that for some reason the Bugle Boy labels were only sold in Canada? The Holland name sandblasted into the glass is only seen on Dutch Philips or Amperex tubes coming out of Canada.
I think, due to the extreme rarity of a real Holland made and date coded 7308 Bugle boy, that 99% of those you actually encounter are fakes from Richardson Electronics. Your pictures do reinforce some facts that still tell the real thing from the fake: The fake 7308 or 6922 tubes NEVER have date codes or production codes on them. Yours does, so I will concede that you have one of the very few real Bugle Boy 7308 tubes in existence.” – Brent AudioTubes.com/6dj8.htm