EEVblog Electronics Community Forum

Electronics => Projects, Designs, and Technical Stuff => Topic started by: ikrase on March 13, 2018, 08:05:11 am

Title: The Quadrupole Mass Spectrometer
Post by: ikrase on March 13, 2018, 08:05:11 am

I've finally bought the first parts to my Quadrupole Mass Spectrometer build: some small air variable caps.

Title: Re: The Quadrupole Mass Spectrometer
Post by: ikrase on March 15, 2018, 06:55:57 pm

Was originally planning to to build my own 300 KHz to 3MHz (approximately) amplifier - roughly 40W and using Class AB probably. Maybe an IRF510 amp.

However I see there are some economical amps of this type on eBay, though most have a bit higher frequency rating that might need toroid rewind.

I see that logarithmic power detector amps are also available as eBay Modules.

Title: Re: The Quadrupole Mass Spectrometer
Post by: hound on November 09, 2019, 02:41:06 am

If you are still working on this project, you might want to check out US patent 5613294.  It describes an implementation of a quadrupole mass spectrometer, and it has a pretty detailed description of the electronic circuits used for rf generation, with a circuit diagram.