On the Ft950, if you set the CW bandwidth to 400 Hz or more, the receive
passband extends downward by 150 hZ from the offset, and increasing the
bandwidth raises the upper frequency limit. Suppose your sidetone/offset is
on 500 Hz and you have set a 700 hZ CW bandwidth (the band is not very
crowded and you are scanning for signals). Under that condition, you will
hear signals at pitches from 350 to 1050 hZ. If you switch from CW to CW
Reverse, the signals you didn't hear (below 350 hZ pitch) are now above 650
Hz and you can hear them. I don't use CW reverse for this purpose, though;
it's too confusing.
I always like to tune a CW band from high pitch to low. If I leave the CW
mode in its normal upper sideband position, this means that I will always be
tuning from the low to the high end of the band. If I want to keep my habit
of tuning from higher to lower pitch, but want to tune the CW band segment
downward, I would use CW Reverse. This would also mean that I adjust the
main tuning knob counter-clockwise instead of clockwise, which would be
consistent with the tuning direction of my Drake C-line, which was on lower
sideband for its CW operation.
So this is a feature that only some people will likely use.
73,
Lloyd Rasmussen, W3IUU, Kensington, MD
http://lras.home.sprynet.com
-----Original Message-----
From: Steve Forst
Sent: Sunday, March 09, 2014 2:10 PM
To: [log in to unmask]
Subject: Re: Auto Zero Beat With Ts590
Tom,
I'm no cw guy, but use this feature all the time and have this
function set to one of my extra pf keys for easier use. I don't recall
the limits offhand, but both filter bandwidth and shift need to be
below certain values i.e. if the filter is too wide or the pitch too
high, the feature won't work.
I think this feature was a 2 button press on the TS-2000, but only a
single press for the 590.
I have to admit I never understood what the cw reverse was all about,
but hopefully I'll learn something.
73, Steve KW3A
On 3/9/2014 12:51 PM, Steve Dresser wrote:
> Tom,
>
> It's quite simple; just press the AGC Off button and wait for a few
> seconds
> while the radio tunes itself. That's it.
>
> Steve
>
> ----- Original Message -----
> From: "Tom Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, March 09, 2014 12:29
> Subject: Auto Zero Beat With Ts590
>
>
>> Hi, again. All.
>>
>> =20
>>
>> So, here is what the TS590 manual says about activating the auto =
>> zero-beat
>> function. I=92m usually pretty good at figuring out these things, but =
>> the
>> instructions are a bit unclear to me.
>>
>> =20
>>
>> If anyone can help decode them, I=92d appreciate that.
>>
>> =20
>>
>> Tom Behler: KB8TYJ
>>
>> =20
>>
>> =20
>>
>> AUTO ZERO-BEAT
>>
>> =20
>>
>> Use Auto Zero-beat before transmitting to tune in a CW station. Auto
>> Zero-beat
>>
>> automatically and exactly matches your transmit frequency with the =
>> station
>> you
>>
>> are receiving. Neglecting to do this will reduce your chances of being =
>> heard
>> by
>>
>> the other station.
>>
>> =20
>>
>> 1 Tune to the CW signal using the Tuning control.
>>
>> =20
>>
>> 2 Press [CW T. (AGC OFF)] to start Auto Zero-beat while CW is selected =
>> for
>> the
>>
>> operating mode.
>>
>> =20
>>
>> =95 "CW TUNE" appears.
>>
>> =20
>>
>> =95 Your reception frequency automatically changes so that the pitch =
>> (tone) of
>>
>> the received signal exactly matches the TX sidetone/ RX pitch frequency =
>> that
>>
>> you have selected. Refer to "TX SIDETONE/ RX PITCH FREQUENCY" {below}.
>>
>> =20
>>
>> =95 When matching is completed, "CW TUNE" disappears.
>>
>> =20
>>
>> =95 If matching is unsuccessful, the previous frequency is restored.
>>
>> =20
>>
>> 3 To quit Auto Zero-beat, press [CW T. (AGC OFF)] or [CLR].
>>
>> =20
>>
>> Note:
>>
>> =20
>>
>> ? When using Auto Zero-beat, the matching error is normally within =B15 =
>> Hz.
>>
>> =20
>>
>
>
>
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