>From 10 kHz on up, IFI and AR come to mind, but what do you mean by low
noise? Harmonics tend to be spec'd around -15 dBc, maybe -20 dBc at best.
What noise figure do you need?

If you need to go down to dc, in my experience you need to cover that with
a separate amplifier, say Techron, those run typically dc to 50 kHz, but
with audio type output impedance - very low.

Any of these amps will tolerate severe mismatch, usually without fold back.
 
Ken Javor

Phone: (256) 650-5261


> From: MACY <[email protected]>
> Date: Sun, 27 Jan 2008 12:18:38 -0800
> To: <[email protected]>
> Subject: Source for high quality 25W Amp, DC to 20+MHz?
> 
> Need a high quality 25W amp for DC to 20+MHz operation. The
> amp should be able to supply 25W to 50 ohm load, but be
> stable with an open load [less than 50pF] and supply the
> appropriately higher voltage.
> 
> Do you know anybody who makes a low noise, high quality amp
> that can put out these voltage levels to an open load?
> 
> Robert
> 
> -
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