Jim
Future update with more recent Yaesu rigs??
Ftdx101
FTdx10
???
On Tue, Mar 12, 2024, 2:30 PM Jim Brown <jim@audiosystemsgroup.com> wrote:
> On 3/12/2024 12:07 PM, Steve Harrison wrote:
> > I would definitely consider FT-991As,
>
> Yaesu radios have long had problems with bandwidth on both CW and SSB,
> producing clicks and splatter that are much wider than rigs from
> Kenwood, Elecraft, and Flex. See this link, which is my analysis of ARRL
> Labs data of popular rigs on CW. It was done with their blessing -- they
> sent me the electronic output of their measurements.
>
> http://k9yc.com/TXNoise.pdf
>
> In following years, I've traced SSB signals with wildly excessive
> splatter to Yaesu rigs. Splatter extends 2.5 kHz on both sides of the
> signal (that is, in the suppressed sideband, and on the other side of
> the active sideband) only 20 dB. W4TV traced the cause to the way Yaesu
> is doing signal processing in the transmit chain, and there are no user
> adjustments to fix it.
>
> This can be heard any time with ragchewers in the SSB bands, and clearly
> seen on good spectrum and waterfall displays that can get narrow, like
> the Elecraft P3. Clean signals show up on the waterfall as vertical bars
> with bandwidth of 2.5-2.8 kHz; these dirty signals show horizontal
> shoots from both sides of the bar on voice peaks.
>
> 73, Jim K9YC
>
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