4000 pf, 5 KV Peak, Jennings CMV1-4000-0105


Capacitance 25-4000 pf
Voltage Rating 5 KV
Current Rating 70 Amps RMS

The capacitor is a high capacity, vacuum variable capacitor. 25-4000 pf capacitance rated at 5 KV peak voltage. These are EXTREMELY RARE units with limited stock available.

4 in stock

Jennings CMV1-4000-0105 vacuum variable capacitor

Rated Capacitance 25-4000 pf
Peak Voltage 5 KV
Current Amps (RMS) Maximum 70 Amps RMS
Shaft Diameter 1/4 inch
Turns for Full Travel Max 13.75
Important Dimensions
Max Length 6.875 in / 174.625 mm (including shaft)
Max Diameter 3.4 in / 86.36 mm
Weight 66.8 oz / 1,893.74 g
Mounting 6 drilled and tapped holes for front end mounting and 5/8 x 24 threaded stud for rear end mounting
Condition Removed from equipment, checked, and guaranteed

Spec Sheet

(Other variations of this capacitor are sometimes available, inquire)
CMV1-4000-0305 CMV1-4000-0005 CMV1-4000 CMV1-4000-5S
CMV1-4000-0605 CMV1-4000-0105 CMV1-4000-0505 CMV1-4000-5
“Out of spec” and “budget” capacitors:

If you want the quality and performance of vacuum capacitors, but the budget just won’t allow it, (or if you are just looking to save some money) we frequently have “out of spec” capacitors. These capacitors do not meet the specifications for the particular model. This can happen because of many reasons, but they are still perfectly usable in other capacitance ranges or maximum voltages.

For instance, we might have a type that is listed at 15 kv, but tests good to 12 kv. In this case, we will not sell it to a user who needs 15 kv ratings, but if you need only 5 kv, 7.5 kv, or 10 kv, this capacitor would do nicely. If you want us to check our “out of spec” shelves for current stock, just tell us your capacitance range and voltage requirements (and current rating if you know it… or approximate power level) and we will let you know what we have available at steep discounts! Inquire here!


We also frequently have in stock many vacuum capacitors which have cosmetic blemishes such as dents, which would not meet our high standards for regular sale, but which still check good, both in range, and in their ability to withstand voltage.

Some dents will damage or totally destroy a capacitor. Others, if they occur in just the right places, cause no harm at all. We have the knowledge and test capability to make these determinations, and if they pass our stringent testing, sell these units at discounted prices with our regular guarantee! If interested in these units, please inquire as to current availability.

If you don’t see what you wanted:

These pages show only a fraction of the stock we have available. We have many thousands of vacuum capacitors, both fixed and variable, as well as vacuum relays. This stock changes daily. If you have requirements for items not listed in these product lines, please Email, and our knowledgeable staff will search our inventory. (Don’t forget to give us your email address and contact information!)

Did you know?

We will buy your used and overstock vacuum capacitors and vacuum relays?

Max-Gain Systems, Inc. is the one source to liquidate your excess inventory of vacuum capacitors and vacuum relays. REDUCE warehousing costs, REDUCE aging inventory & OPTIMIZE warehouse space by selling us your unwanted inventory. New and old stock, used and even removed from working equipment, one unit to one thousand plus, you can make money as well as go green. In addition, most of the surplus items we buy are able to go right back into facilities and into the hands of individuals that need a low cost replacement to keep their plants and broadcast stations up and running.

Sell your New and Used Overstock vacuum capacitors and vacuum relays by emailing us know how many, what manufacturer’s part number, and their condition along with your full contact information and will reply with one business day.

About Max-Gain Systems, Inc.

Max-Gain Systems, Inc. carries a full line of in-series, between series, right angle, T-shaped, quick connect, handie-talkie (BLACK), pigtails (coaxial jumpers), etc… RF adapters. Our RF adapter lines are constantly expanding. We keep our RF connector and adapter lines in stock. We ship both retail and wholesale quantities. To become a dealer / wholesale user, contact us with your potential usage.

Max-Gain Systems, Inc. is the number one supplier of fiberglass round hollow tube, square tube and round solid rod to the antenna manufacturing industry. We produce millions of feet a year for hundreds of different industries including but not limited to: marine / boating, aeronautical, agriculture, construction, emergency services, etc…. We have the unique ability to sell one piece or even a semi-truck full. Feel free to prototype using our fiberglass tube and rod then contact us for a quote on a production run. At production run quantities we can cut to your desired lengths at no additional charge, and we can also perform several different fabrications (example: drilling holes in precise locations along a tube) to ensure your delivered material is ready for assembly. We have several accessory items designed for our fiberglass including but not limited to: couplers, telescoping clamps, ferrules, etc…

Additional information

Shipping Weight 70.00 oz
Shipping Dimensions 17.25 × 17.25 × 23.25 in


Min Capacitance

Max Capacitance


5 KV

Current Rating

70 Amps

Shaft Diameter

1/4" OD Shaft


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