Mechanical Resonators

Mike, KC7IT, sent along this interesting article on the use of mechanical resonators in cell phones.
http://spectrum.ieee.org/telecom/wireless/radios-with-micromachined-resonators

Somehow, this made me think of my beloved Drake 2B. The 2B uses an L-C filter at 50 kHz, but -- sure enough -- a quick visit to the e-ham review section showed that Henry Radio had a vailable a mechanical filter kit -- some of the 2Bs out there are apparently fitted with this device.
Check out the e-ham Drake 2B love-fest: http://www.eham.net/reviews/detail/3868 All of it true!

And of course, this all provides an excuse to put up a picture of the Drake 2B.