The IV was a nice SS preamp from the early 80's that went through several iterations, the IV-H is the hot one.
A very good MM/MC phono stage (early ones were prone to RFI though), option of running it as active or passive (sounds much betetr passive).
A power supply is essential to use the thing.
No supply, no go.
They came with a standard separate power supply.
Or an optional high current supply for $75 (back in 1981).
These preamps were very popular so there's a good chance you'll be able to find a power supply somewhere.
Assuming all is well with the preamp, $20 is a steal.
cheers
