New file uploaded to BITX20
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the BITX20
group.
File : /Bitx-40p2 ver. KMK/Impreso 112x83mm
By
BITX20@...
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#19009
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New file uploaded to BITX20
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the BITX20
group.
File : /Bitx-40p2 ver. KMK/ImpresoBitx40p2 112x83mm.pdf
By
BITX20@...
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#19008
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Re: Bitx 40 board.
Ah, yes. That is a slightly different problem...
The IF is determined by the VFO frequency +/- the BFO, not the nominal filter frequency. Note that you can get either out of the mixer and the
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John Backo
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#19007
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Re: Bitx 40 board.
Thanks John
I already have the 5351 running as a VFO and I may in the future also have
the 5351 run the BFO.
In my sketch I assumed that the "BFO" value meant 12 MHZ, the IF. It should
be the actual
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Ken
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#19006
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Re: Delivery Time Bitx40 (SMD)
Thanks , Sarma VU3ZMV,
I asked the group why it did not have a return from HfSignals
Today I received the tracking number.
Let's wait.
73, PY2ADX - Antonio
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Antonio PY2ADX
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#19005
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Re: Modifying Bitx20 to use a Si5351
I am creating the PCB myself, it it not a pre-designed one, I am just at the initial stage of re-working my original through hole design in to a surface mount one and so am removing the VFO and BFO
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Kerr Smith
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#19004
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Re: Delivery Time Bitx40 (SMD)
It might take litte longer , but it would surely arrive. All the best
sarma
vu3zmv
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mvs_sarma@...
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#19003
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Re: Bitx 40 board.
Ken --
You don't really need to set up a DDS BFO. The on-board BFO oscillator is strong and stable. What you probably should do is adjust the BFO frequency directly to suit your ears. (See message
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John Backo
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#19002
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Re: Calling CQ on 7.285 with BITX
Three stations on the BITX 40 NET tonight
N2CQR
KB9MAC
W3TTT
I opened with my Icom at 100 watts, then switched to the BITX at 7 watts.
I then worked W4QNW in South Carolina 550 miles / 875 km (with
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Baruch Atta <baruchatta@...>
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#19001
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Re: Bitx 40 board.
I got it. I kept thinking the IF(12 MHZ) was the BFO. So it turns out my
BFO is also 11.9986 MHZ.
So if I have mine start at say 7.164 MHZ, it's o/p is 11.9986 - 7.164 =
4.8346 MHZ
OK back to the
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Ken
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#19000
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Re: Modifying Bitx20 to use a Si5351
<< I have not really been able to find much about where the best place is
to put the signal in except for one person who seemed say they put it
directly in to the mixer coils via a 0.1uF
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Todd K7TFC
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#18999
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Re: Modifying Bitx20 to use a Si5351
Hi Todd,
Thanks for the reply, I have been reading the various posts on this this evening and have see lots of people discussing the code (I have written my own code for this) and seen lots of
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Kerr Smith
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#18998
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Re: Unable to pick anything up
First thought is to get the dipole off the floor. Unless you are in the 2nd
story of a wood building. But generally antennas on the ground don't do
much.
Does tuning it do anything? Maybe the
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Mark Baldridge
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#18997
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Unable to pick anything up
Hi there I got my bitx40 v3 and I have hooked up a homemade dipole, i layed it out on the floor.. powered on (did not yet hook up PA).. I get an odd noise:
Voice 001_sd.m4a
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chriscoel@...
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#18996
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Re: Bitx 40 board.
Ken,
I set my Arduino sketch to always start on 7.268.500 so when I turn on the Radio/DDS it always displays that, of course it's only displaying that, but it's really outputting 4.730.100 to the
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Joel Caulkins/N6ALT
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#18995
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Re: Bitx 40 board.
What is displayed on your DDS? 7.000000 MHZ or 7.001400 MHZ.
73 Ken
BITX20@...> wrote:
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Ken
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#18994
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Re: Farhan's AGC
Thanks DuWayne,
Just the info I was looking for. I think I'll build one and give it a try. I already removed the cap between pins 1 and 8 on the 386, so might have to increase gain a bit, we'll
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Joel Caulkins/N6ALT
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#18993
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Re: New BITX40v3 seams deaf on ssb phone signals
Mark
Receiving CW but having broken audio on SSB might be caused by several
things
but I would start with checking the BFO frequency relative to the crystal
filter
characteristic. The BFO for USB
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Arv Evans
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#18992
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Re: Farhan's AGC
I laid out a small circuit board and built it up. It seems to work quite well from the little I have used it. Only thing I noticed was a decrease in total audio level. I compensated for that by
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DuWayne Schmidlkofer
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#18991
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Re: Modifying Bitx20 to use a Si5351
There have been several recent postings on this question. The output of the
5351 can be set at different levels. Do a search of recent conversations on
this reflector.
73,
Todd
By
Todd K7TFC
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#18989
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