Few watt RF amplifiers

Thanks, good point. I'll ask RFBay about it.

Cheers

Phil Hobbs

They're normal 50-ohm single-ended, with SMA connectors.

You want to drive them sinusoidally, because you want a nice sinusoidal shear wave so that you get only one diffracted order. (The Bragg condition helps a lot in reducing that effect, but harmonics can give rise to ghosts in the image.)

The other reason is that hitting it with a lot of harmonics will increase the dissipation and mechanical stress in the transducer, which is a bad thing, since you normally run them within a few decibels of sudden death.

Cheers

Phil Hobbs

How many man-days do you want to burn up to do this? How many man-days does it take to buy a $1000 Mini-Circuits amp?

The 12W of quiescent power makes me think that they're running their devices in class A to make the output as clean as possible -- this may not be a bad thing, for a demo.

It's been years since I looked at Communications Specialists' web site, but if they still exist they may have something for you, particularly if you're willing to have a tech put a kit together. Expect class AB amplifiers, with possibly some distortion.

Tim, ComSpec is not making RF Amps anymore, although the manuals are on their web site.

They do make the very cool LoCATor system for tracking cats and dogs, and a bunch of professional tracking products.

Steve

Enough to look for a better option for purchase, but not enough to design and debug one from scratch, right.

It makes me think that it's underdesigned. The high price suggests the same.

Thanks. I'm going with the RFbay one, because they have it in stock.

Cheers

Phil Hobbs

Grin, that's always a selling point when you are in a hurry.

George H.

That would be interesting. Please let us know what they say.