Capacitor - 365pF, Variable, Single Section

Capacitor - 365pF, Variable, Single Section

Capacitor - 365pF, Variable, Single Section image 1
Capacitor - 365pF, Variable, Single Section image 2
Capacitor - 365pF, Variable, Single Section image 3
Capacitor - 365pF, Variable, Single Section image 4
Customer image:<br/>"Trap/Antenna Tuner"
Customer image:<br/>"HF 80m-6m Antenna Tuner Using 2 Air Variables"
Customer image:<br/>""
Customer image:<br/>"NRR Group CW transmitter"
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Customer Images:
Customer image: "Trap/Antenna Tuner"Customer image: "HF 80m-6m Antenna Tuner Using 2 Air Variables"Customer image: ""Customer image: "NRR Group CW transmitter"
In Stock

Single section 365 pf variable capacitor, also referred to as a tuning capacitor. Single section 365 pf variable capacitor. A compact, rugged, economical unit used in wide variety of low-voltage applications. This capacitor's almost cubical shape makes more efficient use of space and delivers a remarkable amount of capacitance for its volume.

  • 1 ~\frac{3}{16}~" long frame
  • ¼" dia. Shaft ~\frac{9}{16}~" long
  • Capacitance decreases with CW rotation.
  • Minimum capacitance per section: 14.9pF
  • Maximum capacitance per section: 384.2pF
  • Number of sections: 1
  • Air gap: 0.010 inches
  • Maximum voltage: 350Vrms

Note: The four solder lugs are a shared connection. The second connection is the metal frame.

Dimensional Drawing:

Dimensional Drawing
Item ID:
Termination Style:
RoHS Compliant
Product Measurements by Type
Air Gap0.010 in.
Capacitance, maximum384.2 pF
Capacitance, minimum14.9 pF
Depth1.25 in.
Item Length1.38 in.
Item Width1.31 in.
Shaft Diameter0.25 in.
Shaft Length0.57 in.
Voltage Rating350 Vrms
Packaging Information
Packaging Dimensions2 in. × 2 in. × 1.5 in.
Weight (Packaging)0.159 lbs.

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Specifications, Files, and Documents

PNG: Dimensional Drawing Dimensional Drawing224.24 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on August 1st, 2016.
March 25th, 2018
Uhm, I would NOT use this for making an antenna tuner for a high powered linear RF amp, but it does work nicely for 200 Watts or less, preferably 100 watts barefoot. KI7AQJ ham radio, luthrie & custom guitar, bass, keyboard, acoustic guitar & hi fi amps. I can get my ATAS 1200 antenna working down on 80 meters using this, and that is at best a 40 meter antenna. That is awesome!!!
March 30th, 2018
Oh, and NEVER use anything like this with a loop antenna. Those can spike into the 1000s of volts, and you should use a 6KV vacuum capacitor with a loop antenna, unless you are running QRP. (less than 5 watts) Breakdown in air should be maybe a couple hundred volts. You could try to buy some mica and cut it to fit in the air gaps.
November 7th, 2018
Staff Member
The maximum voltage is 350Vrms according to the information above.
Asked by Anonymous on March 1st, 2021.
March 3rd, 2021
Staff Member
Generally capacitors don't have power ratings in watts. The maximum voltage is 350Vrms.
October 9th, 2021
Capacitors are reactive components and thus are not generally rated in watts. Capacitors are rated in maximum opeerating voltage and maximum operating current. Self resonance frequency and Q are also important specifications. This variable capacitor is generally categorized as a "signal capacitor" and is thus intended for relatively low voltages of less than 300 volts and currents of only a few amps.
Asked by Anonymous on December 3rd, 2015.
December 3rd, 2015
Staff Member
Top Contributor
Any knob designed for a 1/4" solid shaft that uses a set screw should work.
Asked by Anonymous on January 18th, 2017.
Matt H.
January 18th, 2017
Staff Member
Hi, according to the info above the minimum capacitance per section is 14.9pF.
Asked by Anonymous on June 30th, 2017.
June 30th, 2017
This would be an acceptable choice for a crystal radio.
Asked by Anonymous on March 15th, 2018.
March 30th, 2018
You will need to wind a coil or two or three, or more. Do some math! I think minimum frequency is more applicable. You should be able to run up to UHF with this, and down to 40 meters or more, 7MHz. Maybe 3.5MHz. Almost no one tries 160 meters. 6 meters has been dead for months. (50MHz) AM broadcast is just below 160 meters. 550 KHz-1.5MHz. You can put a cap in parallel with this, and make it larger. There are lots of free calculators for RF on line. KI7AQJ
Asked by Anonymous on August 22nd, 2018.
August 22nd, 2018
Staff Member
Hello, the air gap is 0.010 inches wide from plate to plate.
Asked by Anonymous on March 19th, 2019.
March 19th, 2019
Staff Member
Yes, these are made in the USA.
Asked by Anonymous on December 24th, 2021.
December 27th, 2021
Staff Member
The wiper extends 0.20" beyond the body of the cap when rotated to its fullest extent.

Product Reviews

4.95 out of 5 based on 20 reviews
- January 21st, 2022
5 out of 5

Nice clean unit that works perfectly.

- January 20th, 2021
5 out of 5

This variable capacitor works well. It's range is 15pF to 406pF on my LCR meter. It is IMPORTANT to know that the 2 connections are made between any one of the lugs and the actual metal body of the capacitor. I use alligator clips to connect it.

- September 23rd, 2020
5 out of 5

Parts arrived here in Aus earlier than expected and well packed. There was a minor issue with the overseas credit card but on the whole I'm glad it was flagged and checked. Glad to recommend as a supplier to anybody here in Australia looking for tube bits and pieces.

- July 26th, 2020
5 out of 5

Capacitor was as advertised. Good replacement or for new construction projects.

- March 30th, 2020
5 out of 5

Excellent product

- March 7th, 2020
5 out of 5

Arrived quickly. Appears to be in working order. I'll update after I finish my project.

- February 17th, 2020
5 out of 5

Well packed, capacitors like those i can find only here, they're cheap.

- January 28th, 2020
5 out of 5

Will build a simple antenna trimmer for BC and SWL use. The variable capacitor arrived well packed. It has threaded holes for ease of mounting and should work out fine. This item used to be commonplace and inexpensive....oh well!!

- January 16th, 2020
5 out of 5

These capacitors are very well built with a solid frame, nice smooth bearings and well formed plates. I’m sure these will work well in my tube transmitter for amateur radio.

- March 14th, 2019
5 out of 5

Capacitor - 365pF, Variable, Single Section works super on my crystal radio i build.fantastic company to deal with.excellent shipping.