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Welcome To The Sphere Research Canadian Test Equipment Site ! RF/Microwave Equipment, 50 Ohm Loads, Attenuators, Accessories and Assemblies | ||||
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Sphere Research Corporation 3394 Sunnyside Rd. West Kelowna, BC, Canada V1Z 2V4 Phone: +1 (250) 769-1834 FAX:+1 (250) 769-4106 A great source for test equipment, repairs, calibrations, useful metrology information, and of course, SLIDE RULES! JUST SCROLL DOWN TO SEE EVERYTHING |
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Now OPEN, our ![]() Literally millions of parts available at great prices! |
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RF/Microwave Equipment, 50 Ohm Loads, Attenuators,
Accessories and Assemblies![]() ![]() ![]() ![]() Interested in RF Diodes (Varactors, PINs, Mixers)? CLICK HERE. Interested in RF Crystals, Filters and Oscillators? CLICK HERE. ![]()
You can order anything here just by picking up the phone, and calling (250) 769-1834 during normal office hours, 8:30AM to 4:30PM PST, or FAX to (250) 769-4106. OR, Email your order to Susan ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
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RF Diodes![]() CLICK to see! |
RF Transistors/ICs![]() CLICK to see! |
RF Components![]() CLICK to see! | RF Tubes![]() CLICK to see! |
RF Power Meters![]() CLICK to see! |
![]() CLICK for bigger PIC! TT2G50 |
![]() CLICK for bigger PIC! ![]() LOC: ER $75 each, 14 available. ![]() |
![]() CLICK for bigger PIC! RFM-SC SC-8-BTP |
![]() New assemblies, with 8 rear 75 ohm ports and common port, plus front -20dB injector and coupled ports. Very wideband operation, 5Mhz to 1Ghz, can be used for bench signal splitting, or racked for CATV signal distribution. CLICK HERE for open side view. $39 each, LAST 1 |
![]() CLICK for bigger PIC! RFM-SC SC-8-BTP |
![]() New assemblies, with F (female) 75 ohm ports, and rear +12VDC wired power connection.. Can be used with matching pad or transformer as a general pourpose 50 ohm RF amp, cable booster for use with a many port splitter, or receiver pre-amp, etc.CLICK HERE for an INTERNAL view, appears to be a 4-stage amplifier. Has 4 tapped screws for bottom attachment. $39 each, we have 5 available. |
![]() RADI-450-470M-FH-100W(R) |
![]() LOC: FACTBOX / WSS $8 each, 12/$79, 192 available. |
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![]() Click to visit Inmet! (now Aeroflex !) INMET 50 Ohm/20dB/5W Attenuator Model 4N5W-20dB ![]() |
50 Ohm 20dB Attenuator 5W DC-4GHz RF power attenuator with Type N(m)/N(f) connectors, very compact. Fully sweep tested, while the nominal spec is only 4Ghz, these work over the full 18Ghz range for this series, with only slightly degraded accuracy at the far end. New, excellent condition. Very useful for extending the range of microwave power meters, and serving as a combined load/attenuator for low power transmitter testing. |
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![]() Click to visit Narda! narda DC-12.4Ghz 2W Attenuator 757C-10 757C-20 ![]() |
50 Ohm, 2W Wideband attenautors, DC-12.4GHz, ideal for lab use as a precision attenuator in many test fixtures and for system calibration. Type N stainless connectors, male to female. This is an excellent all purpose lab attenuator, designed to MIL-A-3933E environmental specs. USED, but excellent condition, fully Sweep Checked, Cal'd. | Have 1 (20dB) |
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![]() Click to visit Narda! narda DC-18Ghz 5W Load 370BNM ![]() |
50 Ohm, 5W Wideband dummy load, DC-18GHz, ideal for lab use as a precision termination in many test fixtures and for system calibration. Type N male stainless connector with gold center pin. This is our favorite termination in the lab, an excellent performer, and very rugged, have both old and new printing styles in stock. Note, these loads are USED, VERY GOOD CONDITION, and work at all frequencies between DC and 18GHz. They have been fully sweep tested using our HP 11691D directional coupler, and have AT LEAST 20dB return loss to 18GHz Better than 20dB Return Loss to 18Ghz. USED, Sweep Checked, Cal'd. |
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![]() Click to visit Narda! narda DC-18Ghz 5W Load 370BNM ![]() |
50 Ohm, 5W Wideband dummy load, DC-18GHz, ideal for lab use as a precision termination in many test fixtures and for system calibration. Type N male stainless connector with gold center pin. This is our favorite termination in the lab, an excellent performer, and very rugged, have both old and new printing styles in stock. Note, these loads are USED, VERY GOOD CONDITION, and work at all frequencies between DC and 18GHz. They have been fully sweep tested using our HP 11691D directional coupler, and have AT LEAST 20dB return loss to 18GHz and better than 25 dB to 12.4Ghz Better than 20dB Return Loss to 18Ghz, and 25dB to 12.4Ghz. USED, Sweep Checked, Cal'd. |
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![]() Click to visit MECA! MECA DC-6Ghz 2W Load 401-1 ![]() |
50 Ohm, 2W Wideband dummy load, DC-6GHz, ideal for lab use as a utility termination in many test fixtures and for system calibration. Type N male connector with gold center pin. This is a great low cost N termination for lab work. Rated 1.10:1 VSWR to 3Ghz, 1.20:1 VSWR to 6Ghz. NEW, sweep tested. | ![]() |
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![]() CLICK to Visit! DB Products, now dbSpectra DC-1Ghz 15/30W Load DB4601 ![]() ![]() |
Just arrived!![]() |
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![]() RELM DC-4Ghz 100W Load T44604 ![]() |
Just got more! RELM 50 Ohm, 100W Wideband dummy load, DC-4GHz, ideal for lab use as a power termination in many test fixtures and for transceiver testing. Power rating can be increased with lowered duty cycle and/or forced air cooling. An excellent all purpose RF bench load. Type N female connector with gold center pin. This is an excellent load, and has tapped holes for permanent installation if needed. Sweep testing shows better than 20dB return loss to 4GHz, usable to 6Ghz. Note, these loads are USED, EXCELLENT CONDITION, pulls from cell towers. They work at all frequencies between DC and 4GHz. They have been fully sweep tested using our HP 11691D directional coupler, and have AT LEAST 20dB return loss to 4GHz, usable to 6GHz. |
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Video Load ![]() |
75 Ohm 0.5W high quality dummy load, ideal for video terminations, and similar use, center gold pin. Not wideband, intended for video line termination use. | ![]() CLICK for bigger PIC! |
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![]() Click to Visit 50 Ohm 2-Way Power Divider Anaren 4B0205 ![]() |
50 Ohm 2-Way Wilkinson in-phase power divider, capable of fairly wideband operation (0.3-3000Mhz) although rated for 1.7-2.0Ghz, see THIS CURVE. All gold SMA connectors. FULL PDF DATA SHEET HERE. | ![]() |
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![]() Click to Visit 50 Ohm 2-Way Power Divider Minicircuits ZX10-2-12 ![]() |
50 Ohm 2-Way in-phase power splitter, rated for wideband operation (2-1200Mhz). All gold SMA connectors. Removed from new, unused assemblies, perfect condition.FULL PDF DATA SHEET HERE. | ![]() |
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![]() Click to visit Alan Industries! Alan 50 Ohm Programmable Attenuator 1dB steps/63dB Range Model 50SA63-284 ![]() |
50 Ohm 2W DC-1GHz High quality remote attenuator (+24VDC supply, ground to activate specific binary attenuator) with Type N(f) connectors. Fully sweep tested, flat to 1Ghz, fully usable to 1.5Ghz with slightly increased variation and loss. Nice portable unit with carry handle. Used, excellent condition, has 1, 2, 4, 8, 16, 32 dB steps, total programmable attenuation is 63dB. We do not have the mating rear winchester MRE connector, but it can easily be replaced with a D-sub 9 pin connector. We will provide the mating connector for an additional $6 if needed. All connections have been marked on the rear panel. |
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![]() Click to visit Weinschel! MCE/Weinschel 50 Ohm/30dB/25W Attenuator Model 34-30-34 ![]() |
![]() 25W DC-4GHz High quality Power Attenuator, model 34-30-34, with Type N(m/f) connectors, very compact, low reflectance, fully bi-directional. Fully sweep tested, one is flat and accurate DC to 9GHz, one to 11GHz, has gold center contacts. Excellent condition, good to beyond 8.5GHz with at least 20dB return loss. 30dB is very useful in conjunction with Power Meters, as it directly converts input Watts to displayed Milliwatts. |
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![]() Click to visit Inmet! (now Aeroflex !) INMET 50 Ohm/30dB Attenuator Model 2060 ![]() ![]() |
50 Ohm 30dB Attenuator 50W DC-5GHz RF power attenuator with Type N(m)/N(f) connectors, very compact. Fully sweep tested. New, excellent condition, rated to 5GHz. Very useful for extending the range of microwave power meters, and serving as a combined load/attenuator for transmitter testing. The 30dB pad converts Watts to Milliwatts, very convenient, often used to facilitate transceiver testing on generator outputs. |
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![]() Click to visit Inmet! (now Aeroflex !) INMET 50 Ohm/8dB Attenuator Model 2N-8dB ![]() |
50 Ohm 8dB Attenuator 2W DC-18GHz RF attenuator with Type N(m)/N(f) connectors, STAINLESS body, GOLD center pins, very compact. Nominal rating from Inmet is 2.5Ghz, but these are fully sweep tested to 18Ghz, all test within 0.4dB, 0.1dB at 50Mhz. Used, removed from new cell assemblies, excellent condition. Very useful for extending the range of microwave power meters, field receiver threshold testing in 2.4Ghz systems, and to reduce generator outputs. Data is HERE. |
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![]() Click to visit Inmet! (now Aeroflex !) INMET 50 Ohm/24dB Attenuator Model 2N-24-070 ![]() |
50 Ohm 24dB Attenuator 2W DC-7GHz RF attenuator with Type N(m)/N(f) connectors, STAINLESS body, GOLD center pins, very compact. Fully sweep tested to 7Ghz, all test within 0.5dB. New, excellent condition. Very useful for extending the range of microwave power meters, field receiver threshold testing in 2.4/5.8Ghz systems, and to reduce generator outputs. |
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RF Load Performance Factors | ||||||||||
VSWR | 1.05:1 | 1.10:1 | 1.15:1 | 1.20:1 | 1.25:1 | 1.30:1 | 1.35:1 | 1.40:1 | 1.50:1 | 2.00:1 |
Return Loss (in -dB) | 32.26 | 26.44 | 23.13 | 20.83 | 19.09 | 17.69 | 16.54 | 15.56 | 13.98 | 9.54 |
Voltage Reflection Coeff. | 0.024 | 0.048 | 0.070 | 0.091 | 0.111 | 0.130 | 0.149 | 0.167 | 0.200 | 0.333 |
Match Efficiency (in %) | 99.94 | 99.97 | 99.51 | 99.17 | 98.77 | 98.30 | 97.78 | 97.22 | 96.00 | 88.89 |
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![]() Click to visit Kings! Kings UG57B/U 50 Ohm N(m)-N(m) Coupling |
50 Ohm DC-12.4GHz N(male) to N(male) heavy silver plated coupling, with gold center contact. This is a very high quality US made connector, ideal for joining microwave test items, directional couplers and sensors with minimal loss. We routinely use them to 18Ghz with excellent results in our own labs. If you have been having problems with imported connectors on your microwave bench, this will be a welcome relief. |
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NEW, Factory bagged. | 50 Ohm/12.4Ghz | |
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![]() Click to visit Bird! BIRD 8173 50 Ohm 300W (CW) Load |
![]() 50 Ohm 300W DC-2GHz RF Dummy Load, with N connector AND bonus N-BNC Adaptor. Fully sweep tested to 2Ghz with excellent return loss. Very good condition, CW power rating allows much higher SSB loads or pulse operation. Great for tuning up HF high power transmitters. Factory PDF manual is HERE. |
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USED, Checked, Cal'd. | 300W (CW) 50 Ohm/2Ghz |
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![]() Click to visit Bird! BIRD 5W Load 50 Ohm Model 80M |
50 Ohm 5W DC-4GHz RF load, with N maleconnector with gold center pins. New, excellent condition, very good performance right through to 4Ghz (>25dB return loss). Very useful a load for small transmitters/radios, and a general purpose RF termination. |
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NEW, factory bagged. | 5W 50 Ohm/4Ghz |
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![]() Click to visit Bird! BIRD 10dB Attenuator 50 Ohm 10-A-MFN-10 |
![]() 50 Ohm 10W DC-4GHz RF power attenuator, with N male and female connectors with gold center pins, very compact, and has fully symmetrical operation. Fully sweep tested to 4Ghz with excellent return loss (>25dB) and attenuation accuracy. New, excellent condition, very good performance right through to 4Ghz (>25dB return loss). Very useful with power meters (432A, 436A, 1045, 42BD, etc.) to extend the power range to 100mW, and protect the sensor and can be cascaded with smaller power rating 20dB attenuators to give full 10W range. Serves as both a load for small transmitters, and an attenuator for measuring. Great for work at 2.4Ghz. Factory PDF datasheet is HERE. |
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NEW, Checked, Cal'd. | 10W/10dB 50 Ohm/4Ghz |
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![]() Click to visit Bird! BIRD 10dB Attenuator 50 Ohm 8306-100-N10DB |
50 Ohm 25W DC-3.5GHz RF power attenuator, with N male and female connectors with gold center pins, very nice quality, heavy silver plating. Fully sweep tested to 3.5Ghz with excellent return loss and attenuation accuracy, usable with some slight added attenuation to 4Ghz. USED, excellent condition, very good performance right through to 3.5Ghz, no resonances. Very useful with power meters (432A, 436A, 1045, 42BD, etc.) to extend the power range to 100mW, and protect the sensor and can be cascaded with smaller power rating 20dB attenuators to give full 10W range. Serves as both a load for small transmitters, and an attenuator for measuring. Great for work at 2.4Ghz. |
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USED, Checked, Cal'd. | 25W/10dB 50 Ohm/3.5Ghz |
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![]() Click to visit Bird! BIRD Termaline 50 Ohm Load Model 8080 |
50 Ohm 25W DC-1GHz RF dummy load, with TNC connector, very compact. Fully sweep tested. New, excellent condition, rated to 1Ghz, but good performance to 3Ghz. |
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NEW, Checked, Cal'd. | 25W/50 Ohm 1Ghz |
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![]() Click to visit JFW! JFW 50 Ohm/1dB Attenuator Model 50F001 |
50 Ohm 1dB Attenuator 2W DC-2GHz RF attenuator with Type N(m)/N(f) connectors. Fully sweep tested. New, excellent condition, good precision to 1Ghz, rated to 2.2GHz (1.4 SWR). Handy for equipment protection, making odd values of attenuation. |
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NEW, Checked, Cal'd. | 1W/50 Ohm 1dB/2Ghz |
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![]() Click to visit Narda! narda 2-18Ghz 500W Load 368BNM |
50 Ohm, 500W/5KW Peak dummy load, 2-18GHz, ideal for high power pulse testing, especially X band radar and similar pulse mode systems. Sweep tested. Used, but very good condition, Type N male connector. Note, these microwave loads cannot be used below 2Ghz, and DO NOT measure 50 ohms at DC. |
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Checked, Cal'd. | 500W/50 Ohm 2-18GHz |
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![]() Click to visit Narda! narda Microline Directional Coupler 3043-10 |
50 Ohm, 10dB Octave Directional Coupler, 2-4GHz, ideal for 2.4GHz wireless network testing of power or antenna return loss. Fully sweep tested. Used, like new, excellent condition, Type N connectors. | ![]() CLICK for bigger PIC! |
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Checked, Cal'd. | 10dB | |
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![]() Click to visit Narda! narda Microline Directional Coupler 3043B-10 |
50 Ohm, 10dB Octave Directional Coupler, 1.7-4.2GHz extended range, ideal for 2.4GHz wireless network testing of power or antenna return loss. Fully sweep tested. Used, very good condition, Type N connectors. | ![]() CLICK for bigger PIC! |
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Checked, Cal'd. | 10dB | |
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50 Ohm, 1/10A in-line fuseholder. perfect for protecting signal generators and other delicate equipment. Minimal loss, 5 ohms resistance, accepts standard glass cartridge fuse. Used, like new, excellent condition, Type N connectors. | ![]() CLICK for bigger PIC! |
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Checked, Cal'd. | In-line fuseholder (1/10A) | |
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![]() Click to visit Merrimac! Merrimac Power Splitter 17773 |
50 Ohm, good to 75Mhz 2-way 0-degree power splitters, ideal for IF lines. Used, very good condition, sweep tested, Type SMA connectors. | ![]() |
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Checked, Cal'd. | 75Mhz | |
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Attenuators MAR110 MAR120 |
50 Ohm Power Attenuators Precision power RF pads, capable of 10W dissipation, in either 10dB or 20dB sizes. Make excellent dummy loads for sampling high power RF signals, or protecting RF Generators. Must be terminated 50 ohms both sides for correct ratio. Gold/Ceramic power package. NEW parts, have large quantity available. | ![]() |
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$3.20 ea. | ![]() ![]() |
IMPORTANT ! Graphical logos and trademarks are the property of their respective owners, including Tektronix, Fluke, RCA, TI, GE, Comair/Rotron, ADDA, General Radio and Hewlett Packard, and are used here merely to unambiguously identify the products. Sphere Research IS NOT a factory authorized distributor for any of the product lines indicated. | ![]()
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