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Re: [Amps] Slow start-up of Amps on CW

Subject: Re: [Amps] Slow start-up of Amps on CW
From: Mark Bitterlich via Amps <>
Reply-to: Mark Bitterlich <>
Date: Tue, 12 Mar 2024 21:09:30 -0400
List-post: <>
FWIW, I've seen the same on two FTdx-9000MP's. Very apparent with ANY ALC 
deflection and running an amplifier. De wa3jpy Mark
-------- Original message --------From: Jim Brown <> 
Date: 3/12/24  3:30 PM  (GMT-05:00) To: Subject: Re: [Amps] 
Slow start-up of Amps on CW 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. 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 
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