[Elecraft] K2 carrier rise/fall times unequal?

Tue Apr 22 14:56:00 2003

Some of the CW waveform control must be in hardware as the K2 manual
says: "U10A and associated circuitry are used to accurately control
power output as well as provide CW waveform shaping".

Looking at that circuitry, there is an RC time constant for rising
amplitudes (R21, C31) of 0.47ms, and one for falling slopes (RP2, C31)
of 3.9ms. Could these be the ones that determine CW waveform? 

All others (C34, RP3) and (R98, C168) are in the 2-5 us range and should
be negligible.

73, 
Sverre

------------------
Sverre Holm, LA3ZA
www.qsl.net/la3za

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Guy Olinger, K2AV
> Sent: 22. april 2003 00:02
> 
> Then the shape would be in the various circuit responses somewhere.
> 
> Sure hope it's NOT in firmware.
> 
> 73, Guy.