[Elecraft] K3s SSB transmitting bandwidth?

"This is good data for those running sound card modes such as FT8." If you do FT8 right you only need a TX bandwidth of 500 Hz (low 1,500 high 2000). Any more than that is only needed for those who insist on not using split and more than a few of those are over-modulating and filling the

Re: [Elecraft] K3s SSB transmitting bandwidth?

This is good data for those running sound card modes such as FT8. Thanks - Bill AE6JV On 12/25/18 at 1:21 PM, rmcg...@blomand.net (Bob McGraw K4TAX) wrote: Just made a quick sweep of my K3S in DATA A mode, no EQ, No SP, and find that it will pass 70 Hz with little to no attenuation. On the

Re: [Elecraft] K3s SSB transmitting bandwidth?

Thanks Bob. Very 73 - Mike - K9JRI > On Dec 25, 2018, at 4:21 PM, Bob McGraw K4TAX wrote: > > Just made a quick sweep of my K3S in DATA A mode, no EQ, No SP, and find that > it will pass 70 Hz with little to no attenuation. On the high end it will > pass 3000 Hz but greatly attenuates

Re: [Elecraft] K3s SSB transmitting bandwidth?

Just made a quick sweep of my K3S in DATA A mode, no EQ, No SP, and find that it will pass 70 Hz with little to no attenuation. On the high end it will pass 3000 Hz but greatly attenuates 3100 Hz.  This is done with the stock filter of 2.7 kHz. At this point in time, I don't have a suitable

Re: [Elecraft] K3s SSB transmitting bandwidth?

On 2018-12-25 11:54 AM, Michael Blake via Elecraft wrote: > Thanks Don. The published curves ( https://elecraft.com/pages/k3s-8-215-mhz-first-if-crystal-filter-response-curves ) suggest > that there will be significant low end rolloff below 300 Hz. The actual low end is controlled by two

Re: [Elecraft] K3s SSB transmitting bandwidth?

The cutoff would be higher than 2.7kHz. What you add to the high frequency end is subtracted from the low end. The high end is normally about 3kHz which means the low end of the roofing filter is at about 300Hz. Yes, ESSB operation would require the 6kHz roofing filter. 73, Don W3FPR On

Re: [Elecraft] K3s SSB transmitting bandwidth?

The rule for a balanced sound is that the product of the lowest and highest frequency should be between 450,000 and 500,000. So for a 2.7 KHz cutoff that means a low cut of 166 to 185 Hertz, or rounding that could be 200 Hertz. Sent from my iPad > On Dec 25, 2018, at 8:03 AM, Michael Blake

Re: [Elecraft] K3s SSB transmitting bandwidth?

Thanks Don. The published curves ( https://elecraft.com/pages/k3s-8-215-mhz-first-if-crystal-filter-response-curves ) suggest that there will be significant low end rolloff below 300 Hz. But I have not taken

Re: [Elecraft] K3s SSB transmitting bandwidth?

Michael, I think the rolloff is not much (in support of those who want ESSB operation. Much of the rolloff depends on your microphone. Jim Brown K9YC has long advocated reducing the TX EQ below 500 Hz or so in order to increase your effective communications power. An improvement of 3 dB or

[Elecraft] K3s SSB transmitting bandwidth?

When using the stock K3s 2.7 KHz. roofing filter and all TX EQ settings are zero (0) what is the normal TX audio rolloff below 300Hz.? Michael Blake k9...@mac.com __ Elecraft mailing list Home: