Date   
Teensy 3.5

Steve P
 

A thought occurred to me, it seems like a few other people have had this thought too, but Teensy would make a good drop in replacement for the nano.

I’m trying to get the 0.20 code ported over to the teensy for testing. I’ll be using the 4 line display code branch. The features I would like to implement include:

I2C display (done)
WSPR and JT modes using JT encode library
SD card implementation for storage of data, messages, frequency memory etc.

I’m having a few issues getting the code to run on Teensy though, I have a git hub at mosteveo/uBitx_Teensy if anyone wants to have a look.

Stephen

Re: Source of small gauge shielded audio wire for a filter #ubitx

Nick VK4PP
 

Hi, Chop up a set of cheap in-ear headphones....

See my new board, awating delivery:  https://groups.io/g/BITX20/topic/14920831?p=Created,,,20,1,0,0
Ill post up pic of it installed once done.
73 Nick.

Re: uBITx fabricated pcb chassis #ubitx

Richard E Neese
 

where to order this case looks great

Re: a Little Gun Shy #ubitx-help #ubitx

Vince Loschiavo
 

All Good today.  Once the KD8CEC software was installed, finally found a newer Memory Manager.
Maybe a Link in Files here for all pertinent programs, ie. uBITX Memory Manager all recent versions that Dr. Lee would like to have up, Hexfiles in sequence.
link to xloader, might give everyone that isn't a programmer a fighting chance to get upgraded to what appears to be great mods to the original software (by the way should also be there)
de
N2AIE
Vince
p.s. like the keyer ...

Re: Listening for BITX on Sunday 7277 kHz

Tom VE3THR
 

FB Vince. That's a great looking rig with the Pi interface. I might swap cases and do something similar  with my new uBITX instead. Could you drop me an email at mycall @ RAC.CA  I would be interested in your comments.
73 Tom VE3THR

Re: Soldering gun or iron

Michael Monteith
 

The white panel looks like nylon.  I use sheets of that to make guards and guide for table saws, routers, etc.  Very slick stuff.  Pretty soft to machine, drill, or cut.  But makes a super slick surface. 

73, Michael

KM4OLT

Re: Another uBitx Add-on PCB.

PeteWK8S
 

Thanks for the suggestion Nick,

BTW... I’ll buy one of those boards if you sell em. 
I’d considered tacking a relay onto a Hi-Per-Mite but yours would be more elegant. 

Let me know. 

Pete WK8S 

Re: Soldering gun or iron

Jerry Gaffke
 

Not necessarily grandpa's.

 I just now noticed the signature in the image, here's more of them:
    https://www.pinterest.com/pin/416090453046673659/

A very famous film star from the 1920's.
My dad always said Buster Keaton was his favorite.
"The General" was filmed in Cottage Grove, Oregon.

His Wen ad looks like it was made in the mid 1960's,
Still have the gun I got about then with my berry picking money. 
Hit the floor a few times, so covered in the friction tape
that now holds it together.  No idea what brand.

Jerry, KE7ER,   Flora OR



On Sat, Mar 17, 2018 at 06:17 pm, Ashhar Farhan wrote:
Anybody remember this from your grandpa's magazine stash ?
- f

Re: #ubitx-help #ubitx-help

Mike Woods
 

Nice build Ron!

I suspect you have noise from the display getting into your audio.  This may be an earth loop issue, or it may be leaking directly in to your speaker as it is shown in the photo located alongside the display. Those of us with BITx40s will recognise that sound!  It is not normally a problem on the uBITx.

Caps (0.1uF and perhaps a 45uF) each side of  the Raduino regulator may help ... it works on the BITx40 for many.  Others may have better ideas about potential solutions. At my place the noise from the antenna is more than enough to drown out this racket, so never was an issue until the antenna was unplugged.   If it was me I would pull those curled up unused wires on your audio and Raduino jacks as these can also generate hash.  Push on the little window on the reverse side of the jack with a flat-bladed screwdriver to release the pin.   They can easily be reinserted later if you store them in the junk box, when you need them to do something.

73 Mike ZL1AXG



On 19/03/18 12:16 PM, R S via Groups.Io wrote:
Opinions of help needed badly here.  About the 5th or 6th time I have turn it on, I was listening to Tom E3TH (I know the call is wrong.  All I could get) the entire 40 meter band has these sounds.  Even if volume all the way down.  I have attached an audio file.  Hope it works.  I did not try any other bands.  I can touch the finals and reduce the loudness dramatically, but still audible.  Can touch anywhere and reduce it.  Antenna and final PA are the most affecting.  The heat sink I put on the Raduino board is warm with only receiving.  I have also attached a few pictures internal.  I have a 1.5 swr on 7.277 MHz using my MFJ269C Pro.
Using a Turner +2 now amplified.  Nothing done from day one without antenna connected.

Thanks,
Ron  KJ4FFG


--
Mike Woods
mhwoods@...

Re: Raduino Replacemnt, COMING SOON!

Nick VK4PP
 

Hi Everyone.
I am happy with my RaduinoI2C board and the Audio Board. I havent build a HPF or LPF yet(other than prototype) but they are straight forward, still waiting on the CW filter...

Now Im trying to figure out the easiet way to get these boards out to people, ordering wise. Ebay wont allow me to list multiple of the same item, you need a $tore for that....
I will need to write up a little info page on eash board and assembly and all that with some pictures and prices. So just look there at what you like, and then send me an email with your order.
paypal only for payment.
Ill just keep a spreadsheet with orders...

Im trying to not over complicate the process and get too caught up in it. The boards work as expected, are great actually, and cant wait to get them out to you all to try...

I will go and check all my mails and get back to those that have already emailed me...

73

Nik.

Re: Raduino Replacemnt, COMING SOON!

R. Kuehn
 

You should check out tindie.com they are set up for small sellers and more geared towards electronics than Etsy.

Ralph
N9WTX


On Sun, Mar 18, 2018 at 22:13 Nik VK4PLN <nickpullen@...> wrote:
Hi Everyone.
I am happy with my RaduinoI2C board and the Audio Board. I havent build a HPF or LPF yet(other than prototype) but they are straight forward, still waiting on the CW filter...

Now Im trying to figure out the easiet way to get these boards out to people, ordering wise. Ebay wont allow me to list multiple of the same item, you need a $tore for that....
I will need to write up a little info page on eash board and assembly and all that with some pictures and prices. So just look there at what you like, and then send me an email with your order.
paypal only for payment.
Ill just keep a spreadsheet with orders...

Im trying to not over complicate the process and get too caught up in it. The boards work as expected, are great actually, and cant wait to get them out to you all to try...

I will go and check all my mails and get back to those that have already emailed me...

73

Nik.

Re: #ubitx-help #ubitx-help

Tom VE3THR
 

Nice job on the layout Ron. Like Mike said, try some 0.1uF caps on the 5V raduino regulator. I didn't see the 4.7K pull up resistor on pins 2&3 of the raduino either. Try another spkr direct to board - no jacks and no grd on the black wire. Same noise with mic disc'd? keep power and signal/audio wires separate - not bundled. Move spkr away from display? Try running off a 12 v battery - pure DC. I had to add a 1000uF electrolytic cap across the DC power on my BITX40 to null the "clicks". Volume control wired correctly?
Good luck and let us know how you make out. Thanks for the audio clip!
73 Tom VE3THR

Re: #ubitx-help #ubitx-help

Brian L. Davis
 

I see that you have enclosed wiring in a tubing, did you twist the wires before sliding into the tubing.
It seems that if you don't twist the wires or replace with shielded wiring there is a lot of digital interference that can be picked up by the circuitry.
I twisted the wiring tightly and then wire tied the lines in place, I get a little tick on tuning but with any signal it is not a problem.

Re: Raduino Replacemnt, COMING SOON!

Nick VK4PP
 

Re: Another uBitx Add-on PCB.

Nick VK4PP
 

Re: RD16HHF1 power curve flattening...some

MVS Sarma
 

I fear the coupling is thro power line.
Please try star mode power line distribution.if possible have a Inductor based "pi" filter for the independent stages in power feed.


Regards
MVS Sarma
 

On Sun, Mar 18, 2018 at 1:57 PM, Glenn <glennp@...> wrote:
Nik,

I have done  a bit more testing now using an RD16HHF1 pair in the final although expediency meant i used the final section of the G6ALU 20W pa design.

I also found oscillation problem (about 110MHz). It seemed to be coming from the 1st and maybe the 2nd stages of the MPSH10 stages.  I removed the 330pF from the 1st stage and it's now pretty tame.  BUT, the response is nothing like as flat as I had hoped it would be. I have no feedback on the RD16HHF1 stages as yet.  I don't run the drive control flat output though as looking at the output on a scope, it's severely flat topping with this level. Around 16-17W is about max. level.

 But I did plot the response of an original complete G6ALU amp and it falls away badly at the 80M end of the HF bands. In the PicaStar where this pa is used, it's no problem as Star has software drive control on each band since its DSP based.

Not much time to investigate further at this stage.

glenn
vk3pe


MSG:
Well, i have dont my mods and powered up. Results are mixed:
Here are the mods.
RD16 replace IRF510.
New output transformer 1:4 BN43-3321 with a 330pf cap on input.
feed back resistors. from 22ohm to 1 K ohm
piggy backed R87 and R88 with 220pf capacitor.
RV1 full drive.

So results.
80M - 20W + ( blew my 2 Amp fuse)
40M - 18W - Seems stable.
30M - 17W BUT I get BAD feedback/ oscillation by just going PPT with no voice. The watt meter goes up to 18W!
20M - 15W  -  Same feedback issue
15M -  Same feedback issue.
10M -  Same feedback issue.

I have been thinking ans looking at other RD16 schematics, in alot of cases they dont use the feedback on the finals?
Also could this issue be cuase in the driver stage?

THanks guys, I am in over my head here....

73
10M - Same feedback issue


Best way to test power before final

Fokko PH0KKO
 

I have built the Bitx20 for the best part, only the final stage with IRF510 remains. Before I start building the final I would like to check if everything works fine sofar. The reception is great but I am not sure what the peak-peak output voltage on tx should be. I have an oscilloscope and a simple 1 kHz sine wave generator. I intend to feed a signal in (using a 100 nF coupling capacitor) at the mic input of about 20 mV (or more?) but I can adjust that if needed.

What (ball park) output voltage is required and should I terminate it with a 50 ohm resistor when checking on my scope?

ubitx michrophone

joseph.cunningham50@...
 

hi i have finished boxing up my ubitx and all working ok,not sure on michrophone as i have to shout into electret to get any power out,would it be ok to fit 5 volt regulator to supply power to normal electret circuit

Re: antenna tuner for uBitx

Curt M.
 

I use my LDG Z-11ProII with an end fed wire and my Bitx40. The tuner only requires 100mW of signal to auto tune. 

http://www.ldgelectronics.com/c/252/products/21/9/1 

Re: antenna tuner for uBitx

Bert N8NN
 

The LDG Z-100Plus tunes with only 100mW of power.  It holds eight AA batteries internally, making it ideal for portable QRP operation.  Small, light weight and self-powered.

Bert N8NN