The first part of my Sansui AU-517/717 restore guide, from recapping to finding those pesky shorted diodes. Not to mention how daunting it is just to remove and then rewire all the PCB’s! Here I hope to help shed some light on the subject.
As you may already know, I started the Hallman Labs Vintage Store a few months back. I am currently using EBay to sell these items and I came across a … Continue Reading Tips and Hidden Rules for Creating EBay Ads – How to Make Sure Your Ad Shows Up in the Mobile App!
I want to introduce the latest release of vintage parts from Hallman Labs, the ultra-rare MiniWatt Mullard/Philips Mustard capacitor. I’ve never before seen these capacitors prior to my acquisition … Continue Reading The Mullard/Philips MiniWatt Brand of Mustard Caps! (Very Rare) Datasheets Given
Potomac AA-51 Audio Analyzer – Calibration Procedure, Service Manual, Ref Images — Early Version of Upcoming Page (Work in Progress)
I decided to go ahead and publish what I had ready in a blog post until it is ready for its own page. The AA-51 is what is holding me … Continue Reading Potomac AA-51 Audio Analyzer – Calibration Procedure, Service Manual, Ref Images — Early Version of Upcoming Page (Work in Progress)
XMOS : BlackGate vs. SILMIC ARS “Super Gold” Capacitors (& Others) Direct Comparison (testing in progress) – Photos and a Preview
I was able to acquire another USB XMOS FUN01 modules (SU-1 Clone), with the exact same HW as my BlackGate™ module (aside from a few little changes). From the various … Continue Reading XMOS : BlackGate vs. SILMIC ARS “Super Gold” Capacitors (& Others) Direct Comparison (testing in progress) – Photos and a Preview
Everyone who subscribes here gets notifications of blog posts, but not site pages! So, I wanted to let my readers know the ELEPAWL EP6 Headphone Review has been published. You … Continue Reading Latest Publishing: ELEPAWL EP6 Review
I apologize about the delay in announcing the winner (from what I said on FB), I’ve been hard at work on the EP6 headphone review. I will be publishing the … Continue Reading Burson Play Giveaway Winner – 2nd Attempt – Prize Claimed (1st Giveaway Finished)
Redrawing Winner for Burson Play DAC/Amp Giveaway: After contacting the original winner and giving ample time (over a week) to contact me, we are now drawing another winner of the … Continue Reading Update on Giveaway (Drawing Again) and Headphone Review in Progress
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 … Continue Reading Burson Play v1.6 DAC/Amp Announcement : The Winner Is..
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 … Continue Reading Last Chance to Enter Burson Play DAC/Amp Giveaway!
It is easy to miss a new site page being added and this being such an important page I wanted to make everyone aware of it who wants to know. … Continue Reading Vintage Parts Store Page Goes Live!
Announcing the Hallman Labs Burson Play v1.6 DAC/Amp Giveaway!! (Last Day for Entries is Aug 31st) Winner Drawing on September 1st
In celebration of successfully launching the Vintage & Precision Electrical Components Store, I am giving away my review sample of the Burson Play v1.6 to 1 person from the Hallman … Continue Reading Announcing the Hallman Labs Burson Play v1.6 DAC/Amp Giveaway!! (Last Day for Entries is Aug 31st) Winner Drawing on September 1st
Update: 8/3/18 – Master Parts Sheet #1 is now completed and I can continue to post remaining ads on Ebay. Some of the best lots are still to come so … Continue Reading Introducing the First of Many Vintage Part Lots & Master Parts Sheet #1
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 … Continue Reading Preview: Rubycon Black Gate™ F vs. Nichicon Muse | XMOS Capacitor Oscilloscope and FFT Comparisons
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.
Latest page added to Hallman Labs. Photo guide on making custom EL-8 cables.
After what felt like forever, I have finally got the review into good enough shape to share most of it with you guys/gals! I hope you enjoy the review, I … Continue Reading Review #3 Goes Live! Burson Play Review
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 … Continue Reading Testing 500x Microscope out on 1000V Sprague (K631788-14) Capacitor (folded/rolled design)
Complete Guide to Making I2S Cable from CAT6A & Connecting it to ES9038Pro DAC (Using Belden 1303E Catsnake™) Updated: 6/12/18
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 … Continue Reading Complete Guide to Making I2S Cable from CAT6A & Connecting it to ES9038Pro DAC (Using Belden 1303E Catsnake™) Updated: 6/12/18
Overall I am extremely impressed with the Burson Audio v2.0 PCB Play, after doing a few small things I had a great result. The Play can do DSD128 with … Continue Reading Update on Upcoming Burson Play Review
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 … Continue Reading Preview of Hardware Reviews in Progress with sAp-10 – Balanced Headphone Amp under $200 (also the Burson Play DAC/Amp)
Update 6/2/18: I completed the discrete op-amp modification after I got the replacement diodes. You need to replace Diodes 11, 12, 13, & 14 with 16V Zener diodes. If you … Continue Reading Old Meets New: Kenwood’s C-2 “Basic” Pre-amp gets a Burson Audio V6-OPA Facelift!
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 … Continue Reading High Res Photos of My New Sprague Tel-Ohmike TO-6A
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 … Continue Reading DSC1.Difference : Update on the DSD Dedicated No-DAC (DAC)!
After weeks/months of trying to get my Cornell Dubilier BF-50 cap analyzer to show what is expected for a good cap vs. a known bad cap, I reached out to … Continue Reading Hallman Labs Capacitor Analyzer : Sprague Tel-Ohmike TO-6A
The Corsair 740 Air: Hallman Labs New Primary Desktop (Case) (Updated 4/14/18 w/ New Pictures, 99% completed)
Update 3: The case is basically finished now, just waiting on a few more minor parts to show up! Here is the first photo from my real camera (Samsung NX3000). … Continue Reading The Corsair 740 Air: Hallman Labs New Primary Desktop (Case) (Updated 4/14/18 w/ New Pictures, 99% completed)
Wanted to let everyone know another section has been added to the website, a pretty basic addition, but worth noting so readers don’t overlook it, should it prove useful. So … Continue Reading Quick Access to All Hallman Labs Related Files | Documents/Download Page Launched
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, … Continue Reading “Help”: My Cornell Dubilier BF-50 Is Testing Open Circuit as Good | Note : Treble Bleeds Halted
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 … Continue Reading Apologies to the Neighbors (Burson Audio’s DAC Testing Reached 100.00dB max!!)
Ran Down (1st) ES9038PRO DAC main cause of the NLOCK | Stuck on Screen Issue w/ No Output! (~ 4 months of troubleshooting show me, it was not the dedicated TCXO clock module): Persistence Pays, this might work again!
This single loose solder ball (could have fallen inside the enclosure at any point) might explain all the problems I had with getting the DAC to lock on … Continue Reading Ran Down (1st) ES9038PRO DAC main cause of the NLOCK | Stuck on Screen Issue w/ No Output! (~ 4 months of troubleshooting show me, it was not the dedicated TCXO clock module): Persistence Pays, this might work again!
**Streaming Again Today 3/28, Later On** Far Cry 5 + the Burson Play DAC Review/Comparison to my ES9038Pro (PC HiFi Gaming Section)
Update: stream is up! https://hallmanlabs.com/hallman-labs-live-game-stream/ Thanks to those who came to watch the stream today, Far Cry 5 truly is breaking new ground for the demands on PC … Continue Reading **Streaming Again Today 3/28, Later On** Far Cry 5 + the Burson Play DAC Review/Comparison to my ES9038Pro (PC HiFi Gaming Section)
After much delay, I was able to go and pick up the Burson Play DAC today. Included was an entire set of both the V6-OPA-D Vivid + V6-OPA-S Vivid and … Continue Reading Burson Play DAC Arrives
Hallman Labs 1st Product for Sale (Soon): Fixed Resistance Treble Bleed Kits V1.0 & V2.0 (Thoughts on V3.0 & V4.0)
Hallman Labs first official products for sale will be treble bleed circuits for guitars! When you dial down the volume on your guitar (with any pickups) the high frequency is … Continue Reading Hallman Labs 1st Product for Sale (Soon): Fixed Resistance Treble Bleed Kits V1.0 & V2.0 (Thoughts on V3.0 & V4.0)
You can find it in the header menu, or just click here: https://hallmanlabs.com/discrete-op-amp-review-pt-1-of-3-detailed-info-pics-of-hw-tips-to-avoid-trouble-more/ Be sure to read the note to the reader if you are going to read … Continue Reading Discrete Op-amp Review #2 Page has Launched – Part 1
Amanero: Upgrading Sanyo Oscon to Vishay BC capacitors | 1x SS3602 Sparkos Goes To Sparks, Literally
First off, I wanted to let everyone know that I plan to publish part 1 tomorrow night/Sunday morning instead of tonight. This was mainly because of the amount of time … Continue Reading Amanero: Upgrading Sanyo Oscon to Vishay BC capacitors | 1x SS3602 Sparkos Goes To Sparks, Literally
Hallman Labs is branching out and this is the first of our guitar related articles! After reading the “25 Essential Les Paul Mods” I learned that the shiny metal covers … Continue Reading Uncapping Seymour Duncan Pickups – Schecter Tempest Custom
We Have Finally Cracked the Nut! Native DSD Decoding over I2S Up and Running! (A Preview In Photos included)
I have to say that solving the mystery of this hardware arrangement was both hilarious and extremely frustrating. Trying to catch one of 6 pins being rearranged is easy to … Continue Reading We Have Finally Cracked the Nut! Native DSD Decoding over I2S Up and Running! (A Preview In Photos included)
Here is a sneak peak at my reference DAC for all of the upcoming op-amp reviews. The Asian holiday really put a delay in this, but as always the hardware … Continue Reading The ES9038Pro DAC Returns! Expect Part 1 of Discrete Op-Amp Review by 3/10/18 (Saturday night)
Below is the 3rd official video from Hallman Labs. This is a time lapsed build log video for the common GM328 Transistor/ESR Testers. This one uses a more compact … Continue Reading Time Lapsed GM328 Transistor/ESR Tester + More Build Video
I had to wait for the Asian holiday to end (Feb 22nd) for the seller to ship out a replacement ES9038Pro completed DAC, in the enclosure with dual toroidal transformers. … Continue Reading Replacement ES9038Pro DAC Now In Route!
Precision Resistors Lot : Over 12,000 Dale & Vishay RN55C Military Spec Resistors! An EBay Treasure Chest
As I mentioned in the previous article, I will use EBay as a vintage or high end/HiFi electronic components supplier when I see a deal. I have bought many … Continue Reading Precision Resistors Lot : Over 12,000 Dale & Vishay RN55C Military Spec Resistors! An EBay Treasure Chest
EBay is by far one of the largest online selections of vintage electronic components in the world. I shop here when I see a deal worth buying, usually in bulk. … Continue Reading Ultra Rare ELNA Vintage Capacitor
Below is the original thread post I made over on ComputerAudiophile.com forums. I am posting it here in the chance someone reading knows what is going on and how to … Continue Reading Houston, We Have Lost Contact: ES9038P DAC Troubleshooting
Heads up for anyone interested in either checking out a new WWII shooter and ensuring my Twitch stream is working correctly.
I am working on uploading a video for this common question I see in chat rooms on IRC and on forums in DIY. The big things to remember when … Continue Reading Making Custom I2S Cables
I didn’t record this soldering job because I was not expecting this to go well. I had one of my oscillator sockets (only socket without an oscillator) get destroyed between … Continue Reading Revived The Amanero! + Close Up of Uncapped Crystek CCHD-575 Oscillator!
Kimber “Kables” Testing At Hallman Labs: The Skin Effect (Signal Freq vs. Conductor Gauge) & Cryo “HiFi Fuses”! (Update 1/25/18)
Update 1/25: I realized after reading my own article and the quotes from Kimber cables that I had wired up my setup incorrectly. Kimber has one conductor carrying the … Continue Reading Kimber “Kables” Testing At Hallman Labs: The Skin Effect (Signal Freq vs. Conductor Gauge) & Cryo “HiFi Fuses”! (Update 1/25/18)
Update 1/21/18: I wanted to let everyone know how impressed I have been with this unit by just using the stock 5532 op-amps with this Douglas Self based circuit design. … Continue Reading DAC Accessory: XLR In -> RCA Out (Ckt Based on D. Self Design) Updated 1/22
I have a complete build video for this, but I wanted to go ahead and share what the working product looks like. It doesn’t make a ton of sound using … Continue Reading Video of DIY Plasma Speaker