[Kenwood] TS-2000 PSK31 CW Filter use

[Alan Wolke]

Steve,

Excellent - I knew that you'd find a way to use it with the TS-2000.

For rigs without the menu 37 function of the TS-2000, the same method can be
used with a simple workaround.  On the RX VFO (CW) you can either:

1) equalize the VFOs (A=B) and use the RIT to adjust the RX VFO up/down
(whichever necessary) by an amount equal to your sidetone frequency

or

2) simply adjust the RX VFO up/down by the sidetone amount (if you can't
precisely set the RIT as in #1 above).

Works great on my TS-870, and friends have reported similar excellent results
with the TS-570.

73, Alan
W2AEW

Steve Ellington wrote:

> I have found two methods for using the excellent CW filters for PSK31 in the
> TS-2000. This will work only in the TS-2000 and not in the TS-870.
>
> The first and most important step for both methods is to enter into menu 37
> and select "ON". This will allow you to switch between CW and SSB modes
> without returning the VFO. Note: Don't be concerned that your frequency
> readout changes between modes. This is the beauty of menu 37!
>
> Method one is rather crude but you can simply switch to SSB mode before
> transmitting and back to CW when receiving. Obviously, this will allow the
> use of the cw filters.
> When receiving in CW mode, observe your software's receive frequency, RX in
> Digipan. This will tell you where to set your "SHIFT" control. You should
> tune the receiver so that the RX frequencies fall between the two extremes
> of the variable passband, 400hz to 1000hz. Example: If the software RX
> indicates 888.3hz, set the SHIFT for 900hz. Now you can adjust the WIDTH
> down to 50hz.
> While you're at it, take advantage of the N.R. feature. This further
> enhances PSK receptions.
>
> You probably don't want to be changing modes every time you transmit so
> here's how to work around that:
>
> Tune your VFO to the center of the PSK frequencies on the chosen band.
>
> Push the SPLIT button.
>
> Push A=B
>
> Using the A/B button, select VFO A.
>
> Select CW mode (This will become your receiving VFO.
>
> Push A/B changing to VFO B
>
> Select USB mode.
>
> Note: You may have to push DISP to force display of modes.
>
> This, VFO-B will become your transmit VFO.
>
> Push A/B for VFO A and you are ready to go. Do not touch the VFO knob unless
> you want to reposition yourself within the band. If you must do this, be
> sure to push A=B again. Doing this will put both VFO's on the same
> frequency. However, the modes will also become equal so you must reprogram
> the VFOs for the proper mode.
>
> Tune with your software. If a station does not fall within the
> aforementioned passband, you can either reposition your VFO, keep your cw
> filter open wide or change VFO A to SSB mode and use the LO/HI cut slope
> filter adjustment.
>
> I hope this helps someone. Thanks to the few that replied to my original
> question about this. Your suggestions helped. Hopefully the manufactures
> will come to realize the importance of using narrow filters for afsk or some
> genius will write a firmware upgrade for these fine rigs. 73
>
> Steve
> N4LQ
>
> - - -
>
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> Larry Wilson KE1HZ kenwood-owner@mailman.qth.net
>
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--
Alan Wolke, W2AEW
"i usta cuDn't speL enjinere, noW i ar wuN"