[time-nuts] YIG oscillators

[Daniel Mendes]

Hi, maybe this topic is a bit boundary for this list, but i´ll just ask 
for general directions....

I´ve discovered these wonderfull bits of hardware called YIG (Yttrium 
iron garnet) Oscillators (and filters!) in Ebay. If someone doesn´t know 
what i´m talking about, they are very broadband tunnable oscillators and 
filters. Now, the questions:

1) Does someone has some good references about them?

2) Can I get them new from somewere in decent prices or just collect the 
trash from ebay? (as most of our Rubudium, OCXOs, Thunderbolts, etc)

Thank you for any help...

Daniel