[Elecraft] Elecraft Digest, Vol 234, Issue 3

[Bob McGraw]

Ken et al:

 From the K3S manual, page 8,  I find: "Duty Cycle   CW and SSB modes,  
100%  10 minutes key-down at 25 degrees C.   There are some additions 
restrictions for 6 meters.   This does not seem to agree with the 
information of W1HKJ.

I've been regularly running my K3S, s/n 10163 since 8/2015 at rated 
output, 100 watts, on all modes, SSB, CW, FT-8, and a couple of others 
with out any issues or concerns.   I also run the power supply voltage 
at 14.5 at the radio during transmit and 14.8 during receive.

73

Bob, K4TAX



On 10/12/2023 7:33 AM, elecraft-request at mailman.qth.net wrote:
> Message: 16 Date: Wed, 11 Oct 2023 23:20:47 -0400 From: Ken WA8JXM 
> <wa8jxm at gmail.com> To: ken.kj9b at gmail.com Cc: elecraft at mailman.qth.net 
> Subject: Re: [Elecraft] Digital mode power handling for KAT3 
> Message-ID: 
> <CAABDLm2a8Kq1Cs5m4BevKnNcv6Cgv=Zt=nd3oQRavvbmm06KHg at mail.gmail.com> 
> Content-Type: text/plain; charset="UTF-8" Not just the tuner, the K3 
> is not rated for full power on 100% duty cycle modes. Just like it's 
> not rated or 100% key down CW. But realize that many of the modes are 
> half transmit and half listen. Different digital modes have different 
> duty cycles. >From the W1HKJ.com website: 100% duty cycle: Olivia, 
> MFSK,RTTY 80%: BPSK, MT63 44% CW 22%:FieldHell There are more modes on 
> Dave's website, but those are some of the major ones. IDK if Joe 
> Taylor has similar information on his website for the modes he 
> supports. It loioks like his modes may require full duty cycle. Ken