[hfsig] soliciting advice regarding 30m HAT

[KB3CS - Chris]

yes, i know it will put a signal out on the airwaves on 40m if you ask it
to ... but i'd prefer knowing if the harmonic emission is too strong to be
permissible without getting a QRPLabs transmit filter first.

i started off with a 3B+ with rpitx already installed and tested, so
instead of using the WWoT image, i loop mounted it and made a tar file of
the user directory, then extracted that in a working directory on my Pi. if
you're having boot problems, you may have to carefully check the partition
table to see if you've gotten bitten by the "GB or GiB" problem - not all
"32G" SDCards (for instance) have the same number of bytes in total. for
example, i got a SDCard from Elektor with a Raspbian image on it and it had
an impossible partition table (more blocks defined than the total number of
block available on the device). had to work out how to resize a filesystem,
then write a sensible (and correct) partition table.

 - \0111 -

On Sun, Feb 10, 2019 at 7:49 PM Bryan Corkran <bcorky at gmail.com> wrote:

> Just tried it for a while here in VK .
> Got spots from nearby states immediately ( 400 to 790 Km )
> Would need to to take to our radio club to properly check for birdies.
> By the way the 30m Hat and SW wont boot on my  Pi 3b + , its fine on my
>  3b
>
> Bryan Corkran, VK3KEZ
>
> > On 11 Feb 2019, at 6:52 am, KB3CS - Chris <kb3cs at arrl.net> wrote:
> >
> > unlike the 20m HAT, there are no frequency selective elements before the
> RF amp.
> >
> > has anyone tested (or could test) the 30m HAT output when instead a 40m
> band excitation frequency is used?  would the output be to horrible to
> inflict on the airwaves?
> >
> > also, if i'm not mistaken, the latest rpitx release uses GPIO4 for all
> output modes.
> >
> > comments?
> >
> >  - 0x49 -  chris  KB3CS
> >
> > _______________________________________________
> > hfsig mailing list
> > hfsig at lists.tapr.org
> > http://lists.tapr.org/mailman/listinfo/hfsig_lists.tapr.org
>
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