Is anyone successfully using Hellschreiber mode on U3S with firmware v3.12a?

I just tried regular and DX Hellschreiber today for the first time and am getting a splattering mess about 20 Hz wide when the signal is monitored using Argo software. ?I regularly use Hellschreiber with my OpenBeacon transmitters and I know what it should look like.

So either I'm missing something obvious or maybe there’s a U3S firmware bug.

73,

John
AA7US

You need to use the Slow Hell mode for grabber
work.

Use an Fsk bandwidth setting of about 4 or 5 Hz.

If my memory serves me right and there have
been no fundamental firmware changes, then
the U3 should send out normal Fskcw for Qrss
work at the normal 4 to 5Hz, and then double
up the Slow Hell bandwidth so that it is nice
and readable on a grabber screen.

That should get you started.

73 de Andy

Ther's also a speed setting for Slow Hell.

Needs to be about 17.

This speed setting will tend to effect the aspect ratio of the characters,
so you can tweak it along with the FSK settings if required to make your
characters look right.

Although you probably know this already, you'll lose sensitivity on Slow Hell
when it comes to weak signals. Slow Hell loses about 10db or maybe more
compared to FSKCW (QRSS). But it does add a bit of variety on the grabbers ;-)

73 de Andy

Thank you Andy!

Using slow Hellschreiber mode with the speed you recommended did the trick. ?It looks great.

Yes... despite the reduced signal strength, a little beaconing variety is what I'm looking for. ;)

73,

John
AA7US

Glad you got there. Have fun !

73 de Andy

Hellschreiber coming in nicely 2256 miles all the way from SW Washington state to Florida using 500 mW. ?I'm transmitting “AA7US CN76XH AA7US CN76XH” on a 10 minute frame.

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Thanks Mark!

Hitting Alaska too...

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On Sun, Sep 16, 2018 at 08:02 PM, M Lu wrote:

Remind me – what is your super-duper antenna?

?

I'm currently using a ~40 foot vertical end-fed wire held up by a 12 meter . ?I use two ~20 foot long ground radials with a 9:1 UnUn and a .

Definitly not very efficient (or super duper), but it gets me to New Zealand and Iceland on the 30m band using less that a watt. :)

John
AA7US