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More Sansui AU-517 (10D7C Diode -> MUR1520 Latching Fix)

Posted on May 29, 2020 (Updated on June 12, 2020) in Audio, How to Section, Vintage, Vintage HiFi

Tore down the AU-517 once again, to get at the Power & Protection circuit. I made a mistake in replacing the 10D7C silicon diodes and hoping this fixes the relay issue.

Announcing the 2nd Round of HL Vintage Capacitors!

Posted on May 18, 2020 (Updated on May 20, 2020) in Electrical Components, HiFi Components, Store, Vintage, Vintage Selling

I am pleased to announce that some of my picks for the 2nd round of capacitors, have been posted on Ebay and can be found right here. This includes more MiniWatt capacitors, including a glorious looking 0.47uF 400V plus a really nice 0.15uF 160V model. I have more MiniWatts to post, so just keep an […]

HL Vintage & Modern Catalogs Section Live!

Posted on January 5, 2020 (Updated on May 25, 2020) in Audio, DIY, Effects Pedals, Electrical Components, Guitar, Vintage, Vintage Lit

HL Component Catalogs Catalogs and Data books Added: 200+Number of Brands: 45 I finally found the time and had all the pieces together again, to be able to share a lot of my vintage catalogs, handbooks and more! I hope that this helps some people find what they are looking for. A couple of years […]

Update to Kenwood C-2 Pre-Amp Page (Re-Cap Complete)

Posted on March 29, 2019 in Audio, DIY, Vintage, Vintage HiFi

You can find the complete C-2 page here. Capacitors Used Include: ELNA SILMIC-II/SILMIC-II ARS/ToneRex, Nichicon Muse/Muse-ES/Fine Gold/FW and a Siemens/EPCOS 1uF MKP output capacitor. Previous Mod: 16V Zener Diode Mod to allow Modern Discrete Op-Amps from Burson Audio.

Sansui AU-517 Complete Re-Cap/Restoration | It’s Alive; Updated 3/27/19

Posted on March 10, 2019 (Updated on September 14, 2020) in Audio, DIY, HiFi Components, How to Section, Vintage, Vintage HiFi

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.

The Mullard/Philips MiniWatt Brand of Mustard Caps! (Very Rare) Datasheets Given

Posted on December 16, 2018 (Updated on June 9, 2020) in Audio, HiFi Components, Vintage, Vintage Selling

A look at the first MiniWatt capacitors that were put up for sale by HL. Now there are many more types available to purchase from us!

Potomac AA-51 Audio Analyzer – Calibration Procedure, Service Manual, Ref Images — Early Version of Upcoming Page (Work in Progress)

Posted on November 7, 2018 (Updated on June 9, 2020) in Audio, DIY, Hardware/Tools/Instrumentation, How to Section, Photos, Vintage

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.

Vintage Parts Store Page Goes Live!

Posted on August 5, 2018 in Site Related, Vintage, Vintage Selling

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. You can find the vintage store at the header with the other sections or directly at this link: https://hallmanlabs.com/vintage-parts-store/     Thanks for checking out […]

Introducing the First of Many Vintage Part Lots & Master Parts Sheet #1

Posted on July 31, 2018 (Updated on August 3, 2018) in Vintage, Vintage Selling

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 keep an eye out if interested!   I know I haven’t posted in a good bit, but rest assured I am working on multiple projects. […]

Testing 500x Microscope out on 1000V Sprague (K631788-14) Capacitor (folded/rolled design)

Posted on June 15, 2018 (Updated on June 16, 2018) in DIY, Hardware/Tools/Instrumentation, Vintage

  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 […]

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