Re: Audio AVC
Technically the simplest circuit (for some people) would be a software solution. Send the amplified output to a diode plus capacitor in a peak detector configuration. The capacitor voltage will be a
By
Hasan Murtaza
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#68157
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Re: Menu Sequence for CEC Firmware v1.200
#ubitx
#firmware
The V3 is next on the to do list.? I have downloaded the V3 firmware that is updated but has the V3 IF frequency.? I will check but I think the menu firmware did not change.
Again, thanks for the
By
Dan Pflugrath
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#68156
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Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio
#ubitx-help
#ubitx
Jens,
I assume the rig is transmitting when first powered up, unless you plug in the microphone.
I think your microphone jack may be grounding the orange PTT wire,
except when the microphone is
By
Jerry Gaffke
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#68155
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Re: Audio AVC
I installed that rf amp but had big issues with bci from a station in South Carolina on 5920khz.
I had to remove it if I wanted to operate after 4 pm. I live in Pennsylvania!
Barry
By
barry halterman
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#68154
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Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio
#ubitx-help
#ubitx
That's very good news!
The IRF510's don't draw current during receive because the LM78L05 at U2 is not getting fed 12v from "TX",
and so the voltage at the IRF510 gates is zero.? If you have not
By
Jerry Gaffke
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#68153
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Re: Audio AVC
Ah, ok.? So it's the ND6T AGC scheme, but with an extra shunt 2n7000 (let's call it Q4) placed at the RF going into this new pre-amp, the gate of the new 2n7000 is controlled by the same attenuation
By
Jerry Gaffke
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#68152
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Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio
#ubitx-help
#ubitx
Update on 'fixing TX' after being able to revive RX yesterday:
I had already prepared to remove the existing IRL510 MOSFET's be
practicing 'de-soldering' on some broken electronics boards
By
Jens Kaemmerer
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#68151
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Re: lsb/usb
Thank you,Adrian, appreciate your help.
By
Raymond House
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#68150
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Re: lsb/usb
Hi,
ok. I've pushed in a pull request against the v5 firmware.
https://github.com/afarhan/ubitx_v5/pull/1
I'll see if I can build a separate image with this fix in it for you. I
haven't actually
By
Adrian Chadd
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#68149
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Re: Audio AVC
Jerry,
Yes, that's the RF preamp.? What really happened is that I just wanted a hot receiver, plain and simple. No excuse, no glory, just that I wanted to pick up almost anything on a string of wire
By
Ted
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#68148
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Re: lsb/usb
hi!
ok. lemme go see if I can publish an image and send ashar an update for the
v5 board.
-a
By
Adrian Chadd
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#68147
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Re: lsb/usb
Thanks Adrian, but I have a big problem with that, I know nothing about
programming It seems simple in the git-hub link you supplied but it's way
beyond my capabilities. I don't know what to do with
By
Raymond House
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#68146
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Re: lsb/usb
yes, it's a bug in the firmware. It doesn't reprogram the VFO until you
change the frequency or transmit.
Here's my pull request against the upstream v4 tree that fixes this and
another bug. the diff
By
Adrian Chadd
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#68145
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lsb/usb
Hi all, my V5 ubitx wont switch side bands on RX, the display says it does
but in fact it makes no difference on a RX signal. It does switch side
bands on TX. any ideas? Thanks.
By
Raymond House
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#68144
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Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio
#ubitx-help
#ubitx
Is the cat alright.
Philip.
By
Philip G7JUR
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#68143
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Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio
#ubitx-help
#ubitx
The electrical path both will show 0 to ground as they are connected to it through
inductors or toroids to ground.
TP1 is ground connected through a toroid.
By
Raj vu2zap
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#68142
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Re: Raduino reinforcement, 3d printed
Tom's absolutely right about the 3D rabbit hole. Be careful if you do though, These buggers can be extremely addictive! Fortunately I have family support (my wife likes the Rose & Stem (stole it
By
Jim Sheldon
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#68141
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Re: Raduino reinforcement, 3d printed
Thanks for this information Tom.
Terry - KB8AMZ
Brimfield Twp, OH USA EN91hd
Linux User# 412308, Ubuntu User# 34905, PCARS#78, NAQCC#6668,
QRP-ARCI#8855, SKCC#14195
[email protected]> wrote:
By
Terry Morris
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#68140
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Re: Raduino reinforcement, 3d printed
A couple of the public libraries around me have 3D printing ability listed as services available at nominal cost.?
I have yet to try them though I have 2 TFT bezels to obtain sooner or later.? You
By
Ted
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#68139
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Re: 18000km
Yep, with CW or JT65 (with error correction) you can do a lot with a
very little.
Great job
Congrats
By
Laurence Oberman <oberman.l@...>
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#68138
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