Re: the cause for the spurs, found!
If one swaps the 3904s for BFR106s in the transmit side amp, is it a transistor swap, or will the job also require re-biasing?
I'm wondering if I should try this, or if it would be better to stay on
By
AndyH
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#61390
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?BITX: CAT connection
Hello!
I read that i could use a CAT interface, but how do i have to wire it? Or does it use the USB port of the radiumo?
73 de Karsten DC7OS
By
Karsten Heddenhausen
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#61389
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weak signal fun
#ubitx
Last 24 hours on WSPR.? I guess nobody told my ?BITX that the bands are dead.
--
www.bitxmap.com ( http://www.bitxmap.com )
By
Doug W
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#61388
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FT8
Hello,
I heard about one or several other QRP kits that come with FT8 in the radios OS. Is FT8 something that can be worked in to a Micro-Bitx with a phone or PC For time and display but without a
By
M. LeBlanc
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#61387
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Re: new unbuilt for sale
#ubitx
Weird, and funny !!
The ¡°ing¡± got moved ¡ should not be in front of the word ¡°on¡± and should be at the end of the word ¡°build¡±
Hmmmmm¡
Sent from Mail for Windows 10
Sent:
By
Ruarto <rhgalyan@...>
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#61386
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new unbuilt for sale
#ubitx
I bought a unit a couple months back ingon a lark, and will not be build it,? ?so am offering it for sale.
Its all there as it came to me except opened for inspection.? ?
?Ready for you to
By
Ruarto <rhgalyan@...>
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#61385
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Re: Bitx 40 12 volt power plug-in connector help please 4 wires go to? I'm getting stuck trying to figure out , 2 black I assume are grounds, the brown 12 volt positive, don't know where the red go's Thanks for any help.
Wording in the instructions may be a bit confusing. The 4th wire is for
connecting separate DC power
to the RF PA section. This lets you use higher voltage on the transmitter
output stage than the
By
Arv Evans
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#61384
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Re: PSK31 ghosts below my signal
Nope. But if you put the psk output back into the radio and see the
crud re-appear, you know where to look!
It doesn't look to me to be the radio.
Wait. This crud only appears on psk? Then it's
By
Diane Bruce
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#61383
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Re: 80m hexfet power amplifier by W7ZOI
Paul,
LPF inductors are normally wound on powdered iron toroids.? Either type 6 or 2 would do, as long as you attain the proper inductance.? You can use the calculator on toroids.info for that.?
By
Mark McNabb <n7eku@...>
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#61382
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Re: 80m hexfet power amplifier by W7ZOI
Sorry for the Noob question, but why would you go from a class AB push/pull PA to a single linear biased device and expect more power?? Could you not just increase the PA supply voltage on the uBitx
By
Evan Hand
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#61381
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Re: 80m hexfet power amplifier by W7ZOI
I really like the 40/20 design posted by back in 2017.?
I may be missing something, but I don't see any specifications on the filter toroids other than inductance. Are additional specs
By
Paul Galburt - K2AYZ
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#61380
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Re: Bitx 40 12 volt power plug-in connector help please 4 wires go to? I'm getting stuck trying to figure out , 2 black I assume are grounds, the brown 12 volt positive, don't know where the red go's Thanks for any help.
It Does and thanks!
By
Scot McMath
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#61379
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Re: Bitx40 and nextion displays
#bitx40
I've also thought the same thing ... ??
Gw0wvl
On Tue, 6 Nov 2018 at 13:12, Praba Karan<vu3dxr@...> wrote: Is there anyway to use nextion display with bitx40?. Point suitable firmware to
By
Marc Jones
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#61378
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Re: ?BITX: Documentation
Hi Greggory ( Geogory Peck )
Nice documentation,
I wish to suggest that the wires leads of 8 lead RMC, 3 Lead and 2 lead can all be bunched meaning plaited ( like a girls hair )
This helps in
By
Prathap Naidu
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#61377
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Bitx40 and nextion displays
#bitx40
Is there anyway to use nextion display with bitx40?. Point suitable firmware to support.
By
Praba Karan
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#61376
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Re: ?BITX: Documentation
Thanks for the documentation.? Hopefully it fills in some of the gaps I was thinking about.? I'm in the process of building mine but have stopped for a few days.? I noticed on the original it made
By
Michael Monteith
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#61375
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Re: Tool Tips -- rectangular holes
I don't have a nice graphic, but I drill a hole just inside the corner of 2
opposing corners then use a coping saw to cut just inside the outline I
make on the metal surface. If needed I touch the
By
Terry Morris
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#61374
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Re: ?BITX: Documentation
Thank you Greggory for compiling a VERY informative and easy to read document.? As a licensed amateur since age 16 (and building my first radio at age 9 - Am 68 in a few weeks time), I do not believe
By
Nigel ZS6RN
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#61373
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Re: the cause for the spurs, found!
Congrats to Farhan and Raj for the fine detective work in figuring out this issue.
--
Ryan Flowers - W7RLF
MiscDotGeek.com ( http://miscdotgeek.com )
Multi Band BITX40 (
By
Ryan Flowers
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#61372
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Re: ?BITX: Documentation
Nice¡
Sent: Monday, November 5, 2018 10:25 PM
To: [email protected]
Subject: Re: [BITX20] ?BITX: Documentation
Karsten, I have created a mini builder's manual for the ubitx, it just
By
MadRadioModder
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#61371
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