Re: Great Results with Mic Preamp
Here is the schematic ... Assumes phantom power (~8V DC) is on the Mic Audio line.? Can be sky wired and shrink wrapped into a small assembly with fly leads that will fit inside of many dynamic mic bodies. 
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Baofeng Speaker MIC on Bitx 40
Need Information (help) wiring a Baofeng speaker? MIC to my Bitx 40. Don't really want to use the MIC speaker, will probably just use the 2.5 mm socket un-wired for the speaker plug. So asking about the wiring to the MIC.
Thanks in advance.
Scot?
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Re: Great Results with Mic Preamp
Jer,
I found a small 1uf electrolytic cap in my parts drawer. 73 Mike KF6KXG
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Re: Great Results with Mic Preamp
Hi Guys, it may have already been posted but I would like to take a look at the mic amplifier circuit. I'm also interested in building a low noise audio pre-amp. Dale kg7ssb
On Mon, Nov 26, 2018 at 4:37 PM N5KBP via Groups.Io <martyduplissey= [email protected]> wrote: On Mon, Nov 26, 2018 at 02:32 PM, Paul Dobosz wrote:
K8PD
Paul care to share the schematic for those of us who don't have access to the article.
?
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N5KBP
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Re: Great Results with Mic Preamp
On Mon, Nov 26, 2018 at 02:32 PM, Paul Dobosz wrote:
K8PD
Paul care to share the schematic for those of us who don't have access to the article. ? -- N5KBP
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Rich Neese has built new screens for 2.5 to 7 inch
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N5KBP
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Re: uBitx Go Box 3d print
Hi Dan,
I can¡¯t give you a link I am afraid. I brought it from the electrical retailer, Maplin, in their bankruptcy sale early this summer.
If you can get hold of a similar size case, it is quite a simple matter to add to the depth of the top and sides in CAD software. Just be careful not to increase the size by using drag handles of the object as everything else then becomes too big!
Good luck and be sure to post some pics of your own version!
73s
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On Mon, Nov 26, 2018 at 03:33 AM, Daimon Tilley wrote:
flight case
Looks really sharp. Thanks for posting.? Can you provide a source for the?flight case that you used?? Thanks & 73 Dan
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I had it running on 1.097 and it was working with my old laptop just fine, recently loaded V1.1 and also no problem.? As the loads are the same and only differs in naming you should be fine.
John
On Mon, Nov 26, 2018 at 4:33 PM John Zonneveld < jjczon@...> wrote: Also with the 817 it works
On Mon, Nov 26, 2018 at 4:30 PM John < jjczon@...> wrote: I recently obtained a new? W10 laptop and didn't install any drivers, maybe they were installed when I installed Arduino IDE. Have no problem whatsoever to connect to my uBitX v3.
Attached device manager and wsjt-x
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John, K5GT 
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Also with the 817 it works
On Mon, Nov 26, 2018 at 4:30 PM John < jjczon@...> wrote: I recently obtained a new? W10 laptop and didn't install any drivers, maybe they were installed when I installed Arduino IDE. Have no problem whatsoever to connect to my uBitX v3.
Attached device manager and wsjt-x
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John, K5GT 
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Re: Great Results with Mic Preamp
Mike,
Glad to hear the preamp is working well with the uBITX ... I originally designed it for the Icom radios but was thinking there might be other radios out there that are setup for Electret mics that it would help with as well.? The 1uF cap value is not critical ... It is there for DC blocking and the value was chosen to keep from rolling off the bass response of the microphone.? I probably could have gone smaller but I had a bunch of 1uF monlythics in my parts inventory and decided to use that value.
I'm currently building a uBITX and will plan to use the mic shown in the QST photo for that radio.
73 - Paul - K8PD
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I recently obtained a new? W10 laptop and didn't install any drivers, maybe they were installed when I installed Arduino IDE. Have no problem whatsoever to connect to my uBitX v3.
Attached device manager and wsjt-x
?
John, K5GT 
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Also, an update to my initial post, the tone I experienced when keying cw was a result of poor construction practice. I had the resistor connected directly to the tip connection along with the blue wire. I backed it off, added a length of wire to the lead of the resistor and joined it with the blue wire on the tip connection. Everything seems fine now, and I buttoned her up for good measure.
Many thanks to this community, looking forward to making some QSOs and, more importantly, modifiying and learning.
73
Jared KN4IYL?
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Jim,
I have attached an image of the wiring of my microphone for reference. I had ordered extra jacks due to a much earlier construction mistake, so I had some extra to do this with. I wired the microphone to the tip connection and the ground, with the PTT switch connected to the ground lead in the middle. The other lead on the switch is wired to the ring connection in the jack. I connect it to the radio with a male to male plug you can commonly find at convenience stores. The radio side is wired purple to tip, orange to ring, and blue to ground. It looks like your connections are reversed as mine were initially.
Hope this helps, 73,
Jared KN4IYL?
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Hello all
I have been working on a few projects and one of them is ready
I don't know if anyone would be interested in a CW Zero Beat but I have 9 in kit and 1 built for testing in the video. If more people are interested I will make more, seeing as this is a CW only item I did not want to be sitting on 100 of them with no interest.
They are 13$ shipped US or 13$+actual shipping outside conus.
I can build them for you for 2$ extra or only solder the surface mount and allow you to build your own.
J1-Power in 9-12V
RV1- Audio in adjustment
J2- Audio in
RV2- Center Freq Adjustment
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Questions please e-mail me direct @ dherron at live dot com
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I am also working on a new digital controlled audio level project (AGC) and hope to have more info soon but we are only in the prototype stage at this time.
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David
?N8DAH
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Re: To shield or not to shield, that is the question.
I put my bitx40 in a metal "collectors" Star Wars tin I had kicking around (I say "collectors" because they're not really collectible -- they sold millions of 'em, and my friend had a pallet's worth in his garage). The metal is a bit thin, leading to some flexing when you plug/unplug peripherals, but it's just the right size and easy to work with, while providing some shielding.
Plus it looks kinda neat, even if my fabrication skills are lacking.
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Jon Tabor KI7JYE
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Thank you for your help guys,Brian
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Re: uBitx Go Box 3d print
On Mon, Nov 26, 2018 at 03:33 AM, Daimon Tilley wrote:
flight case
Looks really sharp. Thanks for posting.? Can you provide a source for the?flight case that you used?? Thanks & 73 Dan
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Re: 7.277mHz Sunday Afternoon
Imho, many hams have ceased to operate the ubitx until they make the mods to be fully compliant. Others just like to test the board to learn and experiment. Last weekend many active ops were busy for the cqwwcw contest. The 40m band also is not that wide outside North America, in Europe we cannot go beyond 7200, so having two rarely used separate frequencies one for NA and one for the outside does not help. Personally I would operate at or around 7177mhz, regardless of the CQ zone, the time and the day of the week.
Il 25/nov/2018 20:57, < davesters@...> ha scritto: Has anyone been trying for a bitx> bitx qso recently on 7.277 I made quite a few contacts in the spring but don't see any action there recently.
73
Dave
k0mbt
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Re: 7.277mHz Sunday Afternoon
Yes Vic and I had a nice qso. I listened on and off after that but quit when I was getting an AM carrier.?
Vic said that he used his bitx40 as a mobile rig at times. I found that very interesting. Perhaps you would start a thread on that.?
I do monitor 7277 at times.?
My rig is usually my ubitx v3? I run the finals at 20 volts Have a new 1000 foot loop antenna.?
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Re: uBitx Go Box 3d print
Thanks Tom. I recently printed one of the paddle keys from Thingiverse and one of the uBitx mikes.?
One thing I did that was useful was print a fly fishing reel and I have installed a 66¡¯ long wire on it marked at points with heat shrink sleeving. I can unwind the right amount of wire as an EFHW then for very band from 40 to 10.?
I can recommend the Prusa printer. I built mine from the kit which was straightforward and a good experience.?
Cheers
Daimon.?
On 26 Nov 2018, at 16:14, Tom, wb6b < wb6b@...> wrote:
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That is a very nice design. The outer case looks like the case I bought at Harbor Freight. I was thinking about mounting the uBITX and a Raspberry Pi in it, also. I just bought a 3D printer, I may go with your design. Although, I'll likely mount
the uBITX board to an aluminum plate and add a little shielding.?
By the way here is another interesting 3d case design I saw while I was poking around for uBITX and Amateur Radio things on Thingiverse.?
Judging from the number of uBITX things I saw, it looks like the people that hang out on this group are just the tip of the iceberg of the number of people that are doing things with uBITXs.?
Tom, wb6b
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N8DAH
_Dave_ AD0B