[Elecraft] [K2] T-R Driver Circuit to key KXPA100

[Heinz Baertschi]

Mark Musick wrote
> Heinz,
> This is exactly how Don wired my K2 to key an external amp.
> The RCA jack is mounted as Don describes.
> It works. What more is there to say?
> I forget what the voltage and current ratings are for the 2N7000, but as I
> remember it will key the majority of amplifiers.
> 
> 73,
> Mark, WB9CIF
> 
> -----Original Message-----
> From: 

> elecraft-bounces at .qth

>  <

> elecraft-bounces at .qth

> > On Behalf Of Don Wilhelm
> Sent: Saturday, January 19, 2019 19:44
> To: Heinz Baertschi <

> heinz.baertschi@

> >; 

> elecraft at .qth

> Subject: Re: [Elecraft] [K2] T-R Driver Circuit to key KXPA100
> 
> Heinz,
> 
> If you have the K60XV option installed in the K2, yes K60XV J2 pin 2 will
> key an amplifier like the KXPA100.
> The only difficult part is to find a place for a connector on the rear
> panel.  There is a place near the key jack where you can mount an RCA jack
> and not interfere with any components on the RF board - keep the jack as
> close to the top of the lower panel as possible.
> 
> 73,
> Don W3FPR
> 
> On 1/19/2019 2:23 PM, Heinz Baertschi wrote:
>> 
>> What kind of T-R keying circuit is necessary in the K2 (with K60XV
>> installed
>> for 60m band usage, no XVTRs connected) to operate the KXPA100 amplifier?
>> 
>> a) Will the XVTR Keyline on K60XV J2-2 / Q3 (2N7000) do it correctly?
>> 
>> b) Is a keying circuit like these necessary?
>> http://folk.uio.no/sverre/LA3ZA/blog/K2/N0SS/k2_t-r_rly_drvr.pdf
>> ftp://ftp.elecraft.com/K2/Mod%20Notes%20Alerts/K2%20Amplifier%20Keying%20Circuit.pdf
>> 
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