[Amps] Slow start-up of Amps on CW

[Jim Brown]

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