[Lowfer] I need an Inverted keying circuit idea

[Bill Ashlock]

Hi Eric,

There is one small problem with this inverter. If the logic LOW from the previous gate is not below approx 0.5 volts the transistor will not fully turn off. (Check the output specification on the logic family you are using) Suggest a 50k or so resistor from base to ground to prevent this from happening.

Bill

> Date: Mon, 5 Oct 2009 19:19:29 -0500
> From: esmithmail at gmail.com
> To: lowfer at mailman.qth.net
> Subject: Re: [Lowfer] I need an Inverted keying circuit idea
> 
> Hi, all.
> 
> I like this one:
> 
> http://www.kpsec.freeuk.com/trancirc.htm#inverter
> 
> 73
> Eric  KD5UWL / WD2XFX
> ______________________________________________________________
> Lowfer mailing list
> Home: http://mailman.qth.net/mailman/listinfo/lowfer
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Lowfer at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html