I recently acquired a nice Shure 55sw microphone (The "Elvis" Style)
and was wondering if I could adapt it to use on a modern rig
(Specifically a Yaesu FT-990 or an Icom 706 MKIIg.

The Shure has swtchable impedances as follows:

L = 25-50 Ohms (38 nominal)
M = 150-250 Ohms (150 nominal)
H = 35,000 Ohms (40,000 nominal)

According to my manuals the Yaesu mikes are 2000 ohms and the Icoms
are 600 ohms.

I have heard that the Shure was a popular studio mike and can produce
a nice high fidelity sound but can the impedance match a modern rig?

Thank for any advice!

Dave - WK8F