500 Vcc comp. pair

I normally use MJE 340/350 for HV power amps but they are only good to

300V. This time I am running 450-500V rails.

What is the next logical step up in voltage using the most commonly available part, and preferrably not TO-3?

Desired bandwidth is 10KHz to 2MHz.

Thanks for any advice.

Louis Kendall

Reply to
Louis Kendall
Loading thread data ...

"Louis Kendall"

** A noval or octal base valve is good at those voltages.

Triode or pentode......

** Consider mosfets. 600 and 800 volt ones are common.

........ Phil

Reply to
Phil Allison

formatting link

Regards,

Boris Mohar

Got Knock? - see: Viatrack Printed Circuit Designs (among other things)

formatting link

void _-void-_ in the obvious place

--
Posted via a free Usenet account from http://www.teranews.com
Reply to
Boris Mohar

Hi Louis,

I don't know exact details about your current topology. If you can use a topology that uses NPN transistors only (or N channel MOSFETS), you can use high voltage deflection transistors (for CRT monitors/ television) or high voltage IGBTs.

I can imagine that this doesn't solve the bias issues, so probably there will be some trade-offs. In case of BJT's, bias current will be higher because of low HFE.

Also current sources (with PNP) require different design (series circuit).

Best regards,

Wim PA3DJS

formatting link

Reply to
Wimpie

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.