WSJT-X very elegantly uses split to offset the TX VFO an adjust
the transmit audio tone (subcarrier) to keep the tone frequency
between 1500 - 2000 Hz throughout the entire 4 KHz receive pass-
band. There is no need (or justification) for a wider transmit
bandwidth.
73,
... Joe, W4TV
On 2018-05-19 8:07 AM, Ed W0YK wrote:
That's fine for decode, but transmit uses the 2.8 kHz filter.
73,Ed W0YK
-------- Original message --------From: "Joe Subich, W4TV" <[email protected]>
Date: 5/19/18 8:01 AM (GMT-05:00) To: [email protected] Subject: Re: [Elecraft] K4
Ed,
> On 5/18/2018 7:43 PM, Ed W0YK wrote:
There are ham reasons for this request, which I made to Wayne 2
years ago. We need a bit more RX/TX bandwidth for the combined
JT65/9 modes.
With WSJT, the upper end of the JT9 audio range is not available
on the K3.
Absolutely not true. All it takes is the KFL3B-FM of KFL3A-6K filter.
I regularly decode the entire 4 KHz combined JT65/JT9 segment or more
than 3 KHz of FT8 activity.
73,
... Joe, W4TV
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