Advanced Receiver Research
- Low noise, fixed frequency receive only preamps, some are have low magnetic parts count.
- http://www.advancedreceiver.com/

Ophir RF
- Designs and manufactures high power, solid state, broadband and band-specific amplifiers. May be suitable for NMR and MRI applications.
- http://www.ophirrf.com

Communication Power Corporation
- A designer and manufacturer of high power, solid-state, RF pulse amplifiers designed specifically for NMR and MRI applications.
- http://www.cpcamps.com

Prana
- A european designer and supplier of RF power amplifiers, suitable for MRI and NMR systems.
- http://www.prana-rd.com

Miteq
- LNA and cryogenic preamps. Make your own Cryoprobe.
- http://www.miteq.com/

EMPower RF systems
- RF power amplifiers suitable for MRI and NMR systems. You pick the modules you need and they put it together for you.
- http://www.rf-amplifiers.com/

Tomco Technologies
- RF amplifiers for NMR/MRI applications from 50kHz to 300MHz. They also carry other RF componenets, T/R switchers. and LNAs.
- http://www.tomco.com.au

Radiodan Henry RF Power Amplifiers
- These guys are distributors for HENRY RF Power Amplifiers. The very best NB RF power amps in the world.
- http://www.radiodan.com/

Peter W. Dahl Co.
- If you are making your own high power RF amplifiers you will need these guys.
- http://www.pwdahl.com/

Broadband Power Technology
- High power pulsed RF amplifiers, narrow and broad-band.
- http://www.bptec.com/

AR-amps.com
- Maker of RF broad band power amps, for NMR and MRI applications.
- http://www.ar-amps.com/artody.cfm

RF Amplifiers
- Offers a near complete line of RF Amplifiers for NMR Applications in both low and high power versions from KHz to MHz. All amplifiers are broad banded.
- http://www.rfamplifiers.com