Date   
Re: Kit-Projects Bitx40 AGC

Curt
 

Wow, not sure why the relay boards were slow to sell, either v3 and v4 folk could care less about spurs, or lots have done axicom surgery. Don't take by advice on kit marketing potential.

Thanks David for preparing my digital interface order within minutes of placement. No hurry in getting it out of your store.

My ubitx is clean through 17m now, so why not some digital mode action. Thanks again for supplying the community here. I hope our merchants on other continents are also appreciated.

73 curt wb8yyy

Kit-Projects Bitx40 AGC

 

Hello all,

 We just put the Bitx40 AGC out to fab for proto type and look forward to having this ready in the coming weeks it will install just like our uBitx agc pre-built with install instructions.

Update:

 Digital interfaces and outboard relay kits are almost gone! Relay boards will be discontinued once they are gone and we are not sure when or if the digital interface's will be re-run

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Audio input to transmitter - level? #ubitx

F5NPV
 

hello,

You can monitor your AF intput with this device . You can tap directly at the input from the mike plug though a 600/600 transformer and in serie with a 10nf capacitor.

vu meter

73s

Re: Audio input to transmitter - level? #ubitx

Don - KM4UDX
 

Is it as simple as adding the(appropriate) resister in series with the meter + side and ground the meter - side?

And where would I tap the a V4 board for the resister going to the + meter?

Don
Km4udx

Re: Audio input to transmitter - level? #ubitx

Jack, W8TEE
 

Would this count?

Inline image

Jack, W8TEE


On Sunday, October 13, 2019, 8:51:16 AM EDT, bobolink <rwhinric@...> wrote:


Big fan of analog meters. For bitx levels and especially in SDRs—to balance the chi. ;-)

--
Jack, W8TEE

Re: Audio input to transmitter - level? #ubitx

bobolink
 

Big fan of analog meters. For bitx levels and especially in SDRs—to balance the chi. ;-)

Re: tx rx led hook up

Edward Reynolds
 

I used a round file and once the paint is gone inside the led hole it’s a tight fit, but no chance of it falling out. 

Ed N7SNT 


On Oct 12, 2019, at 7:15 PM, Curt via Groups.Io <wb8yyy@...> wrote:

I see the info at ubitx.com run by Sunil. See the category 2 construction ubitx case. Click on the picture. It takes you to page with more pictures, one shows where 3 wires are soldered to bottom of board.

I had to open the mounting hole just a little with a reamer, but I left it with a tight fit.

Curt

Re: Audio input to transmitter - level? #ubitx

F5NPV
 

Hello, 
Many options are possible to tune your AF level. obviously measurement tools like ocsilloscope tap directly at the output of the Af Amplifier or a spectrum analyzer is also very useful.
in another hand you can use also another RX, a SDR receiver or even a Websdr online in order to monitor quit accurately your transmission. When you find the correct level without distorsion spikes you just need to calibrate a vumeter with the suitable value and threshold. The UBITX does not have a AF level input monitoring 
and without an additional device to monitoryour level it is simply impossible to know if the level applied from the Microphone preamp is not too high or too low. 

in the picture below you will notice a little switch just below the vu-meter in order to monitor the AGC and AF input level. 
73s F5NPV / Didier


Re: tx rx led hook up

Curt
 

I see the info at ubitx.com run by Sunil. See the category 2 construction ubitx case. Click on the picture. It takes you to page with more pictures, one shows where 3 wires are soldered to bottom of board.

I had to open the mounting hole just a little with a reamer, but I left it with a tight fit.

Curt

Re: tx rx led hook up

knitnerd
 

I just finished my kit today too, smoke test passed. I have the Mic port and a couple things waiting on my antenna, but I’m very happy with the radio as well as Sunil’s case. The LED is where I’m stuck though. Not only does it seem too big for the hole, I can’t find any instructions or pictures of where to connect it.

Re: Ubitx and raspberry all in one. Digital mode FT8 - IK1ZVJ. #ft8

Ashhar Farhan
 

I had previewed a raspberry pi board for hf radios with a high end codec at the fdim. This is for a new radio that i am building to push the limits of what my homelab capability can produce.
Pictures are attached. 
There story so far is that there is a very low noise 24 bit codec on a custom board that plugs into the raspberry pi. The display is a 7inch capacitive touch screen.
The radio is a single conversion, very low distortion superhet without any amplification before the crystal filter and triple tuned filters for each band. Nothing is casual about this radio. Even the power supply had to be included to have low noise rating.

On Sat 12 Oct, 2019, 11:26 PM Ken Hansen, <ken@...> wrote:
That's awesome.

I just picked up a 'like new' Collins power supply cabinet for a KWM-2 series radio at a hamfest. I am thinking seriously about a similar build, with a uBitx mounted inside, but hadn't thought about putting a raspberry pi in there also... interesting idea.

The case looks like this, but there is no speaker installed:

https://www.universal-radio.com/catalog/hamhf/312b3a.html

Ken, N2VIP

On Oct 12, 2019, at 11:04, felicebia@... wrote:



The project stems from my passion for digital modes. The union between ubitx and raspberry works well. The LCD screen is mounted on an old CD mechanism so as to obtain automatic ejection. The project includes a dual power supply with a built-in power supply and battery power for portable use. the commutations foresee the functioning only of the ubitx, only raspberry, together to use the digital modes. On the raspberry WSIT-x are loaded for FT8 and FT4 and FLDIGI for PSK and RTTY.

The enclure is a rack 3U (9 cmx40cmx43cm).

Video on Youtube at the link:

https://youtu.be/TlndGOyNtVc

For info:

felicebia at  gmail dot com

Ham call: IK1ZVJ Felice info qrz dot com

<pannello con LCD.jpg>
<lavoro terminato.jpg>
<pannello scritta.jpg>
<meccanica cd ribaltata.jpg>
<inizio assemblaggio.jpg>

Re: tx rx led hook up

Curt
 

They solder to bottom of the main board. The enclosure should have several papers describing this, or go to Sunil's website,  may be ubitx.com to locate where to solder the wires. I then touched the wires to the led to find the green side of it.

Curt

Re: Ubitx and raspberry all in one. Digital mode FT8 - IK1ZVJ. #ft8

Ken Hansen
 

That's awesome.

I just picked up a 'like new' Collins power supply cabinet for a KWM-2 series radio at a hamfest. I am thinking seriously about a similar build, with a uBitx mounted inside, but hadn't thought about putting a raspberry pi in there also... interesting idea.

The case looks like this, but there is no speaker installed:

On Oct 12, 2019, at 11:04, felicebia@... wrote:



The project stems from my passion for digital modes. The union between ubitx and raspberry works well. The LCD screen is mounted on an old CD mechanism so as to obtain automatic ejection. The project includes a dual power supply with a built-in power supply and battery power for portable use. the commutations foresee the functioning only of the ubitx, only raspberry, together to use the digital modes. On the raspberry WSIT-x are loaded for FT8 and FT4 and FLDIGI for PSK and RTTY.

The enclure is a rack 3U (9 cmx40cmx43cm).

Video on Youtube at the link:

https://youtu.be/TlndGOyNtVc

For info:

felicebia at  gmail dot com

Ham call: IK1ZVJ Felice info qrz dot com

<pannello con LCD.jpg>
<lavoro terminato.jpg>
<pannello scritta.jpg>
<meccanica cd ribaltata.jpg>
<inizio assemblaggio.jpg>

Bitx 40 For Sale

Vince Loschiavo
 

40m Bitx in case .
55.00 + 10.00 Shipping
Contact
vince320@...

Ubitx and raspberry all in one. Digital mode FT8 - IK1ZVJ. #ft8

felicebia@...
 

The project stems from my passion for digital modes. The union between ubitx and raspberry works well. The LCD screen is mounted on an old CD mechanism so as to obtain automatic ejection. The project includes a dual power supply with a built-in power supply and battery power for portable use. the commutations foresee the functioning only of the ubitx, only raspberry, together to use the digital modes. On the raspberry WSIT-x are loaded for FT8 and FT4 and FLDIGI for PSK and RTTY.

The enclure is a rack 3U (9 cmx40cmx43cm).

Video on Youtube at the link:

https://youtu.be/TlndGOyNtVc

For info:

felicebia at  gmail dot com

Ham call: IK1ZVJ Felice info qrz dot com

tx rx led hook up

dgclifford@...
 

hi guys just fished uBITX v5 with india kits case with the extra boards,   working really well. I just need to know where to pick up connections for the tx rx led.  Well pleased with this kit it would be a great starter for anyone but the  building instructions need a complete revision."Confession" i only got one thing wrong volume control is vice-versa, but it adds an original touch .

Re: Thank you Sunil!

Bill Robbins
 

Joe:

I am finally getting around to building mine. Where did you purchase the lcd? Did you require A Bezel?

Bill. WA8CDU

On Mar 20, 2019, at 12:25 AM, Joe Puma <kd2nfc@...> wrote:

Just wanted to say thank you to Sunil for helping me while assembling my new case. These cases are awesome and really add to the fun and creativity of building the uBitx. I am still waiting for the 5” LCD but here are some images of my progress









Joe
KD2NFC



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<image1.jpeg>

Re: Audio input to transmitter - level? #ubitx

Evan Hand
 

II do not know of a way to set it with out some test equipment, at least a dvm that can measure the current to the PA section.

Using either a current meter on the PA input, or an RF power meter on feed to the antenna, I would start with the supplied mic, and then do the "HEEEELOOOW" test in the wireup section on the HF Signals web page.  Use that current or power level as the desired level, and then adjust the audio drive to get the same level of output, or lower.  Then go and try the digital mode of choice and get feedback on signal quality. 

I have not used the digital modes with the uBITX, so there maybe flaws in the above.  I did use the method to verify an amplified mic setting to insure I did not overdrive the mic input, and verified as much as possible with the simple spectrum analyzers (SA) that I have (Cheap RF Explorer and a RSPlay RSP2 used as an SA).  As far as I could tell there was no splatter.

Above are just my thoughts. You are still responsible for the signal quality, and there may be better options, like going to a local club that has access to a SA or other test equipment.

73
Evan
AC9TU

Re: Audio input to transmitter - level? #ubitx

F5NPV
 

hello, 

in order to control the AF input for voice and digital i add the level input measurement on a vu-meter. You just need to calibrate the level you display on it to prevent any overloading of the AF input amplifier.

on the vu-meter i supervise the AGC and AF input with a switch.

73s from Didier F5NPV

Audio input to transmitter - level? #ubitx

Rob French (KC4UPR)
 

Hello,

So I'm driving digital audio into the uBITX, and I'm wondering how, in the absence of any real test equipment, to properly set the audio input to avoid transmit distortion.  Now, I do have the ability to set the peak-to-peak voltage of the DAC I'm using.  So, if the DAC is hooked up to the mic input, what would be the proper audio peak voltage level to be (typically) setting?