handheld voltmeter

It's easy to find a used Fluke digital multimeter on eBay, and they will last quite a while(accurate/tough/dependable). I've had mine for almost thirty years. Some reviews from users: (http://www.eham.net/reviews/detail/4518) Of course, there are less expensive models too.

The amps I've had that needed biasing required a meter to measure mili-volts, not watts or amps.
Might want to check the manual.

An old analog Simpson with the mirrored scale would be great and bring back memories, but overkill for this application, IMO. I'm gonna go check the auction sites...

Go digital rather than analog if you have old eyes and an unsteady hand like me.

I love my Fluke digital 77..Had it for over 20yrs.
Digital is on the money.

OH- If you go Rat Shack: Some of their meters have permanent test leads, and they go bad FAST. Be certain what you get has plug-in leads. Then again- spring for a Fluke, and you'll never regret it.