MAX-GAIN SYSTEMS, INC. - Vacuum Variable Capacitors (over 1000 pf max.)

Max-Gain Systems, Inc. offers a wide line of vacuum capacitors, both fixed and variable, at absolute lowest prices! We have many removed from equipment, from commercial or military sources, as well as new surplus. See item descriptions. All are fully satisfaction guaranteed. On receipt, if not delighted, contact us for refund or replacement, if available. All you ever risk is shipping! Our inventory changes constantly, and many items are not shown here. If you do not see what you want, please email your requirements.

Flanges are required for mounting certain types of vacuum capacitors, both variable and fixed. See item descriptions regarding required flanges, if any. We frequently have these mounting flanges available for sale, either with capacitor purchase, or separately. (Inquire for current availability and pricing) Click this link for a listing of Jennings flanges, complete with illustrations and dimensions! (We also carry many Comet flanges.)

We have available large inventories of spare parts for vacuum capacitors, including pullers, shafts, bearings, flanges, etc., even for obsolete types! We offer hipot testing and diagnostic services, (to 60,000 volts) and in some select cases, we can perform repairs and restore "sick" capacitors.

If you require capacitors not in our surplus or used stock, or require factory new-in-box stock only, we are an authorized factory dealer for both Comet and Jennings Technology, and can offer all Comet and Jennings new stock at BELOW suggested list pricing!

If you have surplus motor-driven vacuum capacitors or variable inductors (such as were found in military antenna couplers) and wish to slow down the drive motor for more precise tuning, CLICK HERE for a link to an instructional page.

Jennings UCSXF-1500-10S

Jennings UCSXF-1500-10S glass vacuum variable capacitor.

Rated Capacitance                              20-1500 pf
Peak Voltage                                       10 KV
Current Amps (RMS) Maximum        45 amps
Shaft Diameter                                     3/8 inch
Turns for Full Travel Max                   30
Important Dimensions
     Max length                                      10 in / 254 mm (including shaft)
     Max Diameter                                 5.1125 in / 128.86 mm
Weight                                                   93 oz / 2.64 kg
Mounting                                               Permanently mounted front flange with 6 drilled holes for front end mounting included.  FM3C Flange needed for rear end mounting (Available at additional cost)
See our flange page: http://www.mgs4u.com/Jennings-flanges.htm
Condition                                                Removed from equipment, checked, and guaranteed.

Price: $359.00 Order Now!

Jennings CVDB-1500-15N225

(Other variations of this capacitor are sometimes available, inquire)
CVDB-1500-7.5S CVDB-1500-10S CVDB-1500-15S

Jennings CVDB-1500-15N225 ceramic vacuum variable capacitor.

Rated Capacitance                              36-1500 pf
Peak Voltage                                       15 KV
Current Amps (RMS) Maximum     180 amps
Shaft Diameter                                    This capacitor is supplied from Jennings with a .875 inch OD "misalignment connector" permanently installed on shaft (shown in photo). We can supply this capacitor with a more standard 1/2 inch OD shaft, or 1/4 inch OD shaft if preferred, at no additional charge. ***SPECIFY in "comments" if you do not want the factory-supplied shaft.***
Turns for Full Travel Max                 33
Important Dimensions
      Max length                                     8.8 in / 223.52 mm (including shaft)
      Max Diameter                                5.4 in / 137.16 mm
Weight                                                  151 oz / 4280.78 g
Mounting                                              6 large drilled and tapped holes for front and rear end mounting
Condition                                              New / Unused

Price: $995.00 Order Now

Jennings CVEP-1500-20N789

(Other variations of this capacitor are sometimes available, inquire)
CVEP-1500-7.5S CVEP-1500-10S CVEP-1500-15S CVEP-1500-20S
CVEP-2000-7.5S CVEP-2000-10S CVEP-2000-15S CVEP-2000-20S

Jennings CVEP-1500-20N789 ceramic vacuum variable capacitor.

Rated Capacitance                             100-1500 pf
Peak Voltage                                      20 KV
Current Amps (RMS) Maximum      210 amps
Shaft Diameter                                   1/2 inch (Also available with a 1/4 inch diameter shaft installed for $10.00 additional. Specify: “1/4 inch shaft option”)

Turns for Full Travel Max                 33
Important Dimensions
      Max length                                   10.2 in / 259.08 mm (including shaft)
      Max Diameter                              7.2 in / 182.88 mm
Weight                                                 290 oz / 8221.36 g
Mounting                                             6 large drilled and tapped holes for front and rear end mounting
Condition                                             New / Unused

Price: $1295.00 Order Now!

Comet CVXC-1600CC/3

(Other variations of this capacitor are sometimes available, inquire)
CVXC-380CC/13 CVXC-550CC/11
CVXC-850CC/7 CVXC-1600CC/3

Comet CVXC-1600CC/3 X-Cap SlimLine variable gas capacitor

Manufacturer's Datasheet http://www.comet-pct.com/Resources/Service/Service_Bulletin/SB-30_X-Cap_SlimLine_a_Variable_Gas_Capacitor.pdf

Rated Capacitance                             70-1600 pF
Peak Voltage                                      3 kV
Current Amps (RMS) Maximum       33 amps
Shaft Diameter                                   1/4 inch
Turns for Full Travel                          N/A, maximum capacitance occurs when flat slot in shaft aligns with red dot on the body of the capacitor, every half turn of the shaft.
                                                             Minimum capacitance occurs when flat slot is perpendicular to the red dot on the body of the capacitor, similar to “butterfly air variable”

NOTE : Since these capacitors go through their entire tuning range in only 1/2 turn, tuning can be very “touchy”. We have new 6:1 vernier (gear reduction) drives available for only $12.00 as well as 1/4” shaft couplings available on this page: http://www.mgs4u.com/RF-Microwave/ceramic.htm

With a 6:1 vernier installed on the capacitor shaft, it will then take three full turns to travel the full range of capacitance, allowing for MUCH higher-resolution tuning.
Important Dimensions
          Max Length                             9.84 in / 169 mm (including shaft)
          Max Diameter                         5.8 in / 65 mm
          Weight                                    23.63 oz / 0.67 kg
Mounting                                           4x drilled and tapped holes on top and bottom
Condition                                           New/Unused, old stock

Price: $195.00 ( Order Now! )

Jennings UCSL-2000-3S

(Other variations of this capacitor are sometimes available, inquire)
UCSL-1500-3S UCSL-1500-5S UCSL-2000-3S UCSL-2000-5S
UCSL-3000-2S UCSL-3000-3S UCSL-5000-2S UCSL-5000-3S

Jennings UCSL-2000-3S glass vacuum variable capacitor.

Rated Capacitance                            20-2000 pf
Peak Voltage                                     3 KV
Current Amps (RMS) Maximum     42 amps
Shaft Diameter                                  1/2 inch (Also available with a 1/4 inch diameter shaft installed for $10.00 additional. Specify: “1/4 inch shaft option”)

Turns for Full Travel Max                26
Important Dimensions
      Max Length                                 8.25 in / 209.55 mm (including shaft)
      Max Diameter                             3.06 in / 77.72 mm
Weight                                               34.5 oz / 978.06 g
Mounting                                           FM2 Flange needed for front end mounting and FM2S Flange needed for rear end mounting (Available at additional cost)
See our flange page: http://www.mgs4u.com/Jennings-flanges.htm

Condition Removed from equipment, checked, and guaranteed. Excellent condition.
Price: $295.00 Order Now!

Jennings UCSXF-2000

Jennings UCSXF-2000 glass vacuum variable capacitor.

Rated Capacitance                              50-2000 pf
Peak Voltage                                       10 KV
Current Amps (RMS) Maximum        45 amps
Shaft Diameter                                     1/4 inch
Turns for Full Travel Max                   34
Important Dimensions
      Max length                                     10 in / 254 mm (including shaft)
     Max Diameter                                 5.125 in / 130.175 mm
Weight                                                   85 oz / 2.4 kg
Mounting                                               FM3B Flange needed for front end mounting and FM3C Flange needed for rear end mounting (Available at additional cost)
                                                               See our flange page: http://www.mgs4u.com/Jennings-flanges.htm
Condition                                               Removed from equipment, checked, and guaranteed.
Price: $349 (Capacitor only) Mounting flanges available at additional cost if desired.

Order Now!

Jennings UCSL-3000-3S

(Other variations of this capacitor are sometimes available, inquire)
UCSL-1500-3S UCSL-1500-5S UCSL-2000-3S UCSL-2000-5S
UCSL-3000-2S UCSL-3000-3S UCSL-5000-2S UCSL-5000-3S

Jennings UCSL-3000-3S glass vacuum variable capacitor.

Rated Capacitance                            50-3000 pf
Peak Voltage                                     3 KV
Current Amps (RMS) Maximum     80 amps
Shaft Diameter                                  1/2 inch (Also available with a 1/4 inch diameter shaft installed for $10.00 additional. Specify: “1/4 inch shaft option”)

Turns for Full Travel Max                20.5
Important Dimensions
      Max length                                   8.3 in / 212.85 mm (including shaft)
      Max Diameter                             3.57 in / 90.68 mm
Weight                                                48 oz / 1360.77 g
Mounting                                             FM2 Flange needed for front end mounting and FM2S Flange needed for rear end mounting (Available at additional cost)
See our flange page: http://www.mgs4u.com/Jennings-flanges.htm

Condition New / Unused
Price: $295.00 Order Now!

Jennings CVEC-4000-10N764 ( Air-cooled, high capacity, high current vacuum variable capacitor)

(Other variations of this capacitor are sometimes available, inquire)
CVEC-4000-10N764 CVEC-4000-10S

Jennings CVEC-4000-10N764 (Water-cooled, high capacity, high current vacuum variable capacitor)

Rated Capacitance                       100 - 4000 pf
Peak Voltage                                12.5 KV
Current Amps (RMS) Maximum   593 amps
Shaft Diameter                             1/2 inch
Turns for Full Travel Max           37
Important Dimensions
   Max Length                                 17 in / 431.8 mm (including shaft)
   Max Diameter                              8 in / 203.2 mm
   Weight                                         560 oz / 15.876 kg
Water Cooling Nozzle Dimensions
   Inner Diameter                             1.5 in / 38.1
   Outer Diameter                            1 in / 25.4 mm

Mounting 6x drilled and tapped holes on the top and bottom
Condition New / unused old stock.

Price: $1995.00 ( Order Now! )

We usually have many other capacitors in stock in this capacitance range. We do not, however, have any in large enough quantities to list here.

If you have needs of capacitors in this range of capacitance, please email us with your needs. Be sure to list preferred tuning range, and peak voltage requirements, as well as any other requirements such as power handling or size restrictions, and we will be happy to search our stock for possible matches.

Naturally, as distributors for both Comet and Jennings, we can also order new, factory fresh stock in anything you require.

Thank you!

"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!

"SCRATCH AND DENT" 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!)

To order, use our secure online order form, or call us Monday through Friday 7 AM - 4 PM Eastern time at 770-973-6251.

You may also print the order form using your browser's print button and fax your order to us at 815-461-7730. PLEASE give us your email address so that we can easily contact you in case we have a question.