[Heathkit] Keying the DX-100 cathode circuit

[Ron Youvan]

   On 03/19/2017 12:28 AM, Howie WA3MCK wrote:

> Hello glowbug & boatanchor aficionados,
>  I would like to know if there are any modern electronic keyers available
> today that will handle cathode keying.
> Specifically the DX-100.
> I'm not going to do the grid block keying mod that some have recommended.

   I do not know all of the keyers, but a small added power supply* and
two transistors will create an interface in the DX100 that will allow
you to chose the keyer based on it's features, use an old horizontal
output transistor (NPN ~1,200 Volt Vcbe) out of an old B&W TV set.
  * Voltage double the 6.3 Volt filament supply for ~10 Volts dc
-- 
   Ron  KA4INM - Youvan's corollary:
                 Every action results in unwanted side effects.