Hallman Labs fundraiser for purchasing higher-end audio systems for testing & audio measurement tools. Thanks!

To the readers out there who might have some extra cash or have located hard to find info here & are feeling gracious. This will be to help support this site and hardware adventures coming down the line. Thanks for your support (monetary or interest/views), both helps a solo site runner keep pursuing their goals.


You can use the PayPal donation option above (which allows you to make as many $2 donations as you want) or use the link at the bottom of the page.


Soon you will see vintage hardware here with more test figures from reputable hardware than almost any other online store I have seen on Ebay or the like. I will be using testing hardware ranging from vintage (Sprague TO-6A) to modern. Modern test hardware includes my Extech 380193 LCR Meter, BK Precision 810C capacitance meter, EDS 88A DIY ver. capacitor analyzer that does DCR (DC Resistance) and ESR (Equivalent Series Resistance).

I am excited to see how my vintage hardware business idea turns out in the end. The math adds up, we’ll see if the economic side does and hope the no ads/trackers strategy on this site helps to set me apart. Until then, all donations mean more than you can imagine.

This will also help to buy review hardware and test instruments here at Hallman Labs. I do not run any advertising, tracking, pop-ups, etc. of any sort on the website. I don’t make money through the site itself yet. Even when I do, the operating budget of Hallman Labs is not large and I do the best I can with what I have. I will also show donations of anyone’s time to help with the site of over 2 hours.

If you would like to make a hardware donation either vintage hardware for restoration/parts or donation hardware for review, please contact me at

Capture 6


Thank You so Much!
Keith R. Hallman