Topics

Keyer for ubitx #ubitxcw

Kelly Mabry
 

Hey everyone hope everyone is doing fine today. I am thinking about a keyer for the ubitx. I did the mod for the paddles for the lone cw key jack, but after flawless operation for a few days, it began placing an extra dash at the end of of whatever I sent. I searched for short circuits, open circuits etc. No joy. I removed the paddle mod completely and restored the operation. Now it seems to randomly kick into transmit for a brief second and then quit, going minutes to hours between ocurrences. I know about adding the resistor to keep from accidentally keying the transmitter; its included and installed in the front panel board in Sunil's amateurradiokits.in kit.

I am thinking about selling it all. Honestly I dont want to, but although I have the desire to test it I just dont have the eqipment to test it. I dont have a club to rely on. I want to know if i can plug a keyer into the cw key jack and operate in that manner. The old heathkits used "grounded grid" keying...
I tried adding an extra jack with external resistors but apparently I didnt wire that up right either. Getting discouraged with backward steps. I mean how could I screw this up?!! Ok. Got that off my chest... thanks for listening.   I will entertain  offers for the radio, V5.  My phone number is 870 638 4602. No collect calls... US ship only. The plan is get test equipment as recommended by others in this thread and then jump back in at a later date. This is just a retreat, not a surrender. Will throw in the AGC board also. (kit-projects.com)

73, 
Kelly KD5AJ 

Sam Tedesco
 

Kelly, 

That's a common issue on the paddles. There is a blocking diode mod that has done he job for me on 4 different builds. Before you do that, you might want to run an adc session to make sure your contacts are sending stable inputs....check ian's website. Once it's fixed, you'll never think about it again. I'll get you the mod tomorrow morning, unless someone else remembers the resistor that needs the diode. Otherwise, yes...you can run a keyer into your straight key port. BTW, gotta be careful with Sunil's front board. It doesn't plug n play well with multiple cw inputs.. it will tho 

Kelly Mabry
 

Sam, thank you. This is going to make or break my decision to sell. If this works, great I will soldier on... if not, then ...well you know. I anxiously  await your help. I have even thought about paying for someone to correct my mistakes  but  that is not the amateur radio way. I know that it is better to persevere than to give up, so I am still here. 
Thanks again!
73,

Kelly KD5AJ 

Sam Tedesco
 

http://ubitx.net/2018/07/31/glitch-on-cw-keying-on-ubitx/

I lifted r52, on side towards 2822 chip, add diode in series...cathode down to board (ver 3 board). This took out all extra characters for paddles and key.

On my 3.5" sunil case, I left the key alone on front panel and ran the paddle circuit on the rear daughter board. On the pic, you can just see the two resistors on the daughter board come together and are ran under the main board to the front panel. I soldered the wire to the pull up resistor on the side away from the key input.

If you want to run paddles up front, you have to cut a trace on Sunil's front input board...I have not done this.

Kelly Mabry
 

Hi Sam! Thanks for the response. I will look into this and have a go at it!
My board is a V5, but I am willing to try anything at this
Point.

73, 
Kelly  KD5AJ 

Joe Puma
 

Hi Sam, do you hear your mic audio in your speakers with that amp and also not having much shielding on the wires. or do you just do CW with your rig?

Joe

On May 28, 2019, at 11:25 AM, Sam Tedesco <stedesco619@...> wrote:

http://ubitx.net/2018/07/31/glitch-on-cw-keying-on-ubitx/

I lifted r52, on side towards 2822 chip, add diode in series...cathode down to board (ver 3 board). This took out all extra characters for paddles and key.

On my 3.5" sunil case, I left the key alone on front panel and ran the paddle circuit on the rear daughter board. On the pic, you can just see the two resistors on the daughter board come together and are ran under the main board to the front panel. I soldered the wire to the pull up resistor on the side away from the key input.

If you want to run paddles up front, you have to cut a trace on Sunil's front input board...I have not done this. <IMG_20190402_053934.jpg>

Sam Tedesco
 

I pretty much only run cw...but, I don't recall hearing any audio in my speakers. I only ran a few tests with the mic to make sure it wasn't overdriven with the linear hooked up. All was good...

@kelly, I took a quick peek at the schematic and it looks like the resistor is the same number on v5. I'll get a pic later, if you need one.

Kelly Mabry
 

Yes, please. I would appreciate that!
Again thank you Sam.

73, 
Kelly KD5AJ 

barry halterman
 

Kelly, you might want to use Dr. Lee's memory manager and in that you can specify at what point the adc ( from your front panel readings) will trigger a dot, dash or alternate between dot and dash.  Your values in MM could be at the edge of what your adc values are, thus giving you these problems.
I can not remember what default setting are but they are set for the listed resistor value in the dot and dash key lines on the jack. The adc readings change with contact resistance,  resistor tolerance and cosmic Ray's.
This issue drove me nuts until I finally entered the values that I was seeing with the adc on my V4.
K3BO

Curt
 

Kelly

let's not keep score on misteps - I might be pretty high on 'errors' also.  I am doing okay using the ubitx on cw with a straight key - it is enough to calibrate us this is not a QSK rig.  but I got used to it, and made many contacts.  I imagine a paddle should work as good, once you land the recipe - either with stock of KD8CEC firmware.  (there is a third source said to work better maybe, but try the easier path first). 

let's not give someone a discount to have the 'challenges' we have been having - they can pay full price hi hi.  this is some rig for what it costs.  on SSB is so cool to work DX with 5 watts (no I don't have huge antennas here).  enjoy the ride - and let the rig sit for a few days as required.  a 'world' full of aid is here in the journey. 

73 Curt

PS - don't wear yourself out on the simpler mods.  AGC helps but is not huge.  etc. nice you have a v5 - lots of info that the spurs are decent.  CUL here

iz oos
 

I had experienced two cases of random errors. The first when I did not solder correctly the two resistors. The other when the jack contacts were not doing a perfect contact. Note that I am not using a paddle but I use either a vertical or PC via usb-serial with optocoupler. Once I used the right jacks (usually are really terrible) that made a good contact I have not noticed errors at 24wpm even if I use the stock firmware of version 3.


Il 29/mag/2019 01:13, "Curt via Groups.Io" <wb8yyy=yahoo.com@groups.io> ha scritto:

Kelly

let's not keep score on misteps - I might be pretty high on 'errors' also.  I am doing okay using the ubitx on cw with a straight key - it is enough to calibrate us this is not a QSK rig.  but I got used to it, and made many contacts.  I imagine a paddle should work as good, once you land the recipe - either with stock of KD8CEC firmware.  (there is a third source said to work better maybe, but try the easier path first). 

let's not give someone a discount to have the 'challenges' we have been having - they can pay full price hi hi.  this is some rig for what it costs.  on SSB is so cool to work DX with 5 watts (no I don't have huge antennas here).  enjoy the ride - and let the rig sit for a few days as required.  a 'world' full of aid is here in the journey. 

73 Curt

PS - don't wear yourself out on the simpler mods.  AGC helps but is not huge.  etc. nice you have a v5 - lots of info that the spurs are decent.  CUL here

Sam Tedesco
 

Hi Kelly,

I still owe you a pic. Were you able to get any further on this?

Kelly Mabry
 

No. Not yet. I fell and broke my toe, so i was waiting on it to heal.. feeling much better today. I am a picture person so i didnt mind waiting for the picture.

73,
KD5AJ 



Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------
From: Sam Tedesco <stedesco619@...>
Date: 5/30/19 3:45 PM (GMT-06:00)
To: BITX20@groups.io
Subject: Re: [BITX20] Keyer for ubitx #ubitxcw

Hi Kelly,

I still owe you a pic. Were you able to get any further on this?

Sam Tedesco
 

Ouch...sorry about your toe.  I have two pics. The resistors for the paddles on the rear board. They come together to the yellow wire and it is soldered to the left side of the pull up resistor (screwdriver pointing to it) on the bottom of the board. On the rear board, you can see the thin white wire (pointing to it)that thato ground to complete the paddle circuit.

Kelly Mabry
 

Curt you are always a good source of inspiration for me; I thank you buddy, for your encouraging words. I love my little ubitx. The toe is getting better, i am walking better.

Thanks & 73,
Kelly KD5AJ 

Kelly Mabry
 

Sam, I see how you did it. I feel confident I can do the same thing. I will try this fix during the weekend. I have a sermon to finish tonight and tomorrow. Thanks to you also
for coming to my rescue. I see now that i had tried to solder to the wrong side of that resistor up front. 

73 & Thanks again!

Kelly KD5AJ 

Sam Tedesco
 

Hope it works out for you. FYI, my rear ports are a bit deep for the 3.5mm plugs to push in all the way. I had to shave a bit of plastic from my plugs to push them past the metal case.

Once we get paddles working, we'll run an ADC test to confirm proper converted voltages. Then, we can run the blocking diode on r52.

    

Kelly Mabry
 

Sounds great  Sam!

73,
Kelly KD5AJ