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I wish I could post pictures of my capacitor analyzer set up. I use a $6000 calibrated LCR that will plot many parameters from ESR, Dissipation, Q, Capacitance, Impedance, at frequencies from 10Hz to 100KHz. After that they go onto a 0-1600 VDC power supply and are checked for leakage. This is usually reserved for filter caps, but I also run coupling caps, for charge and discharge timing, and leakage. I test for current and voltage leakage in line with a variable load. The Spargue PS has a slower charge time, lower Q, higher ESR and a more vintage tone than the 715 or 716 orange drop. I literally have dozens of ice chests filled with new old stock Astron, Ajax, Mullard, Sprague, Aerovox. Mallory, Illini, Chicago Condensor, Sangomo, Paktron, etc. These were all tested and culled. The best of the best batches were plotted so I can attempt to match modern caps to vintage specs. The Sprague PS is not a perfect match to anything vintage, but they work as a superb generalize vintage cap. The 715s do not! I have my choices for what is a match to what. These PS Spragues (now owned by CDE) are great for new builds, and general repairs. I have a place that winds great Astron & Blue Molded style caps for about 6-16 cents each. I only have to buy 6000 at a time, per value. That is a little overkill. Antique Electronics is by far on my top 10 list of favorite local businesses in the valley. Yes, I have friends that order parts from Antique and Antique mails them to off to them, in The United Kingdom, Germany, Georgia (both Georgias), New Jersey, Colorado, Sweden, Russia, and my house in Phoenix too, which is only 30 minutes away. We love having Antique and CE right next door in Tempe! It is something I am super proud to have in my back yard! They have been just great, and this is a great product!
