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I have used lot of such devices / softwares, and know how they
Lingua took really a bit to be able to set it at its best, but
that changed at every DX QSO.
Some were really impossible to do without Lingua on, and that
was just surprising how it changed the understanding of the
speech; adjustments are a bit critical, and it requires quite
a bit of practice filtering and setting, before to be quick
enough not to loose the QSO: Mostly, it was affected by
bandpass settings, it seemed better, most times, to have a
wider bandwidth and low NR settings.
Some other QSOs were impossible to do with Lingua on ... no
matter of settings, surprisingly enough.
I did not test it with FM U/VHF as it does not interest me at
all, I used it also on the bench with a step attenuator on
receiver, with variable noise and bandwidth, and also used it
on real conditions, hunting for DX and / or very poor signals
on phone band. Sometime I was enthusiastic, others not at all,
After two months of learning and experience with it, I handed
it to a friend that was also really curious to test it on
phone DXs on low bands, mostly 160m .
He tested it extensively and came to my same impressions of
use, and of hardware.
I guess I will give it next another try on the field, using
it on /P in some HB9WFF/p club activation, then decide to keep
it or to sell it .
It requires to go around with cables, small jack adapters, a
small separate battery: it is not very practical to go around
with all that mess!
Were it also useable for CW, at least, it could have saved
some other device to be carried with in the backpack; but it
was clearly stated that was not for CW , anyway.
I feel that with such a powerful system, as they say, it would
have been practical to switch the firmware to do that, too.
But anyway, these are my impressions, mileage may vary, others
may feel it as a miraculous cheap device.
73 44 , Augusto
Il 07/02/2018 15:58, Siegfried
Jackstien ha scritto:
the dsp in mchf (and also in the named other external devices
like lingua etc etc) can not dig out a signal that is not
readable without (complete burried in noise) ... it just can
help a bit ... there must be a tiny bit signal to noise ratio
that the dsp can work with ... then it works wonders ... it
really helps to reduce the noise so the ear is a bit more
relaxed to concentrate on the real signal ... it really "serves
your nerves" :-) ...
Am 07.02.2018 um 14:01 schrieb
I was looking on the M0NKA page short after posting
my message, and I feel it's very interesting.
Sorry to see oncemore the idea stolen for eastbiznez
... we OM should not buy if they do not pay royalties
or the due ... but this is another issue.
You name the Lingua SprachExtractor ... I have it.
It's true, I did with it some phone SSB QSO that
would already not be possible, no good for DX hunting in
pile-up; also found many other negative points.
I gave it to a friend, good DXer, to test it; and he
also was not 100% ueberzeugt damit .
For that price, I am not fully satisfied with it.
It could be IMHO a bit better issued; it's only
for phone, maybe better for FM phone by local chatter, DX
is another thing.
That hartdware could also have a switch and another
firmware for CW, this would have made it a complete
devbice; also, no stereo phones output youmust use
adapters and these with time break the jack.
You have continuously - in DX listening - to move
regulations up and down, and these potentiometer seems not
of the type that support a long intensive use, and they
ate also soliciting the printed circuit board.
An internal cell phone type li-ion battery could have
a good solution instead of the 12V supply. And some other
idea about its hardware and firmware.
Anyway, they are IMHO , FWIC ...
73 44 , thanks Siegfried!
Il 07/02/2018 14:07, Siegfried
Jackstien ha scritto:
you never heard of the mchf???
chris changed the design when changing from 0.6 to 0.7
version of his boards
i liked more the older design 0.3 to 0.6 boards (we started
out project group with 0.4 version)
the firmware now has so many functions it is a bit to much
to name them all here
but when you campare an mchf with old firmware with one
with actual firmware you have two completely different
radios ... newest firmware has such a nice noise reduction
that it is nearly as good as prachextractor lingua, bhi
noise surpression speaker or similar (jps nir 10 or 12 as
another example) ...
i can really dig out a signal that is barely readable in
if you prefer cw ... a nice peak filter helps to lift up a
tiny signal (no ringing!) ... etc etc
just wait a bit till we have finished the backend for the
ovi40sdr (that is the mchf with turbo ... grin)
frontend is finished (ui board) and can be used with the rf
board of mchf (backwards compatible) ... new rf board will
have more power and better filters (still in alpha stage)
cause the firmware is open source and there is a
programming community now of over a dozen programmers there
is sometimes 2 or 3 versions of new firmware a day!!! the fw
is RUNNING forward in seven miles boots
what i like is that you need no pc anymore for digital
modes ... just a (wireless) keyboard
size of mchf with battery pack included is like a tetra
pack (1l milk or juice box)
when you need some more infos (besides what you find with
google) drop me a direct mail
Am 07.02.2018 um 10:59 schrieb
MCHF? I do not know it; "muscled" seems
vy interesting, keep me informed pse.
I also used a Archos 7", android 4, with companion
bluetooth keyboard shell, otg cable, the FT-817, two
cell phone 10Ah power packs with
some homebrewed USB adapters to put them in series for
the rig. Nice, small and light system.
Il 07/02/2018 11:19, Siegfried
Jackstien ha scritto:
just use the mchf instead
cw decode on screen
rtty rx and tx with no pc
psk31, 63,125 .. rx and tx with no pc
.... plus freedv!! (digital voice over shortwave)
ps in our local club we are developing an mchf on steroids
... bigger cpu , bigger screen, more output power
Am 06.02.2018 um 19:42
Thanks Mats for
the Infos! Very appreciated.
I knew about the controller in the battery,
since Zenith Pentium2 black&white laptops years
ago, hi ...
Anyway, many laptops I had these times ran
without battery no problems; and some these times
had a 12V NiCd battery so I used them no problem
with the direct connection to a car battery.
But today the laptops are of course a lot much
complex. I will try that old laptop,
then see what will happen.
The pairing with an FT-817 seems me very
actractive: a laptop running FT817 commander or even
HRD and a small giant like the FT-817 may be very
interesting, specially with digimodes
73 44 de Augusto HB9TZA / I2JJR
Il 06/02/2018 20:18, Oidar
Many modern laptops "talks" with the PSU over the DC
cable to adjust optimal performance and charging
settings, depending on the capacity of the power
brick. Also many laptop batteries contains a
microcontroller that reports some data about status,
capacity and often including serial number.
I have a not so fresh HP laptop that, after some
upgrade simply refused to charge in the docking
station, and i gave up after fiddling with it for some
The same power brick fitted directly in the computer
SO, you may bump into unforeseen problems when trying
an alternative powersupply or battery, in order to
reduce the RFI.