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[Amps] NOS Oil-Filled HV capacitors

To: amps@contesting.com
Subject: [Amps] NOS Oil-Filled HV capacitors
From: John Lyles <jtml@losalamos.com>
Reply-to: jtml@losalamos.com
Date: Fri, 7 Nov 2025 22:42:00 -0700
List-post: <mailto:amps@contesting.com>
There are regularly repeated discussions about using series of HV electrolytics for filter capacitors in the plate power supply for thermionic amplifiers. I have some "classic" sealed oil-filled non-polarized capacitors, all made by Plastic Capacitors company. They are a mix of new and used, but its pretty hard to destroy them unless you over-voltage them or break off the insulator terminal and cause a leak. Their lifetime is not limited like electrolytic capacitors. I need to make space and so am offering them for sale. I already shipped several boxes earlier this year. The shipping cost was $85 for 4 of the 15 uF capacitors. I am asking very reasonable prices, about 5-10% of new cost. Reach out to me if interested in any and I can let you know if I still have them and how much. I pack them very well.

LK50-306Y 30 uF, 5 kVDC, 7.31" L x 5.62" W x 8" H + 1.25" for the insulators.

LK40-156  15 uF, 4 kVDC, 4.62" L x 3.75" W x 8.5" H + 1.25"

LK5-605Y  6 uF, 5 kVDC, 4.62" L x 3.75" W x 4.75" H + 1.25"

73

John

K5PRO





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