The *QST *review says the TX Delay of the FT-2000 was measured at 35 ms on
SSB. See
http://www.arrl.org/files/file/protected/Group/Members/ProductReview/pdf/pr0702.pdf
.
For the FT-2000D it is 37 ms (
http://www.arrl.org/files/file/protected/Group/Members/ProductReview/pdf/pr0710.pdf
).
73,
Bob, N6TV
On Wed, Sep 8, 2021 at 5:18 AM <k1ttt.dave@gmail.com> wrote:
> A couple related questions for both Yaesu and amps guys.
>
>
>
> Just had to send pgxl back for replacement of an ldmos. They say one
> possible cause of ldmos failure is not allowing for at least 20msec between
> ptt and rf, which I thought I had set. but maybe not when looking at it in
> detail. generating ptt through winkeyer which has settings at either 30 or
> 50msec from n1mm logger so that 'should' cover modes where n1mm or the
> winkeyer generates ptt I hope. But what about ssb vox? Is there some
> setting I can't find to delay rf there? Or will that always be longer
> because of dsp and af-if-rf chain??
>
>
>
> The pgxl provides for ptt-in and a ptt-out that isn't asserted until it is
> ready for rf, that should add safety to all modes except using ssb vox
> unless there is a way to interrupt the vox to ptt internal conversion in
> the
> ft-2000. has anyone found a way to do that??
>
>
>
> Does anyone make a device to measure ptt to rf delay time? I know I can do
> it with a 2 channel scope using an rf tap. but it would seem like a nice
> simple device to take ptt and rf, pass them through samplers and measure
> the
> delay from ptt to the rf envelope start.
>
>
>
> David Robbins K1TTT
> e-mail: <mailto:k1ttt@arrl.net> mailto:k1ttt@arrl.net
> web: <http://wiki.k1ttt.net/> http://wiki.k1ttt.net
> AR-Cluster node: <telnet://k1ttt.net:7373/> telnet://k1ttt.net:7373
>
>
>
>
>
> _______________________________________________
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> http://lists.contesting.com/mailman/listinfo/amps
>
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