Date   
Re: ubitx AM brodcast problem #bitx40help #ubitx #filters #bitx20 #bitx20help

MVS Sarma
 

use the linked calculator and try making a band stop filter , say from 1  to 2 MHz  It works like trap and you can manage
 the enclosure of ubitx should better be metallic and  the body grounded. the filter could be  between antenna socket and pcb  ant pins.

All the best

sarma vu3zmv

 


On Fri, Oct 11, 2019 at 2:37 PM <circular.simetry@...> wrote:
Hello everybody, i have a problem with my ubitx on receive, i am receiving an AM station who broadcast on 1530khz  all over the bands. it dosent matter if i am on 3,5 or on 28 mhz. this station is over 100km from me

ubitx AM brodcast problem #bitx40help #ubitx #filters #bitx20 #bitx20help

circular.simetry@...
 

Hello everybody, i have a problem with my ubitx on receive, i am receiving an AM station who broadcast on 1530khz  all over the bands. it dosent matter if i am on 3,5 or on 28 mhz. this station is over 100km from me

Re: ubitx mic Icom HM-219 #ubitx

Skip Davis
 

Lisa, try connecting pin6 to your pin7 on the socket this will give you the ground connection for PTT. The PTT switch on this mic is between pins 5 & 6. 

Skip Davis, NC9O 

On Oct 10, 2019, at 22:55, kc9bg.lisadavis@... wrote:

I have an 8 pin mic connector wired in to the ubitx.  Will an Icom HM-219 electric mic work?  I can't get transmit to trigger.  Current wiring is: pin 1 = mic + (purple from ubitx), pin 7 mic - (blue ubitx), pin 5 ptt (orange ubitx).  I have seen a reference to put pin 6 to ground.  What ground?   Jumper to wire 7?  Chassis ground?  First build of a ubitx v3 and wasn't even sure it would work correctly after seeing the board when I replaced the required smd parts, but it is working so far.   CW key does throw it into transmit, and the transmit worked with the original mic plug.  Thanks for any help.  Regards, Lisa Davis  KC9BG

ubitx mic Icom HM-219 #ubitx

kc9bg.lisadavis@...
 

I have an 8 pin mic connector wired in to the ubitx.  Will an Icom HM-219 electric mic work?  I can't get transmit to trigger.  Current wiring is: pin 1 = mic + (purple from ubitx), pin 7 mic - (blue ubitx), pin 5 ptt (orange ubitx).  I have seen a reference to put pin 6 to ground.  What ground?   Jumper to wire 7?  Chassis ground?  First build of a ubitx v3 and wasn't even sure it would work correctly after seeing the board when I replaced the required smd parts, but it is working so far.   CW key does throw it into transmit, and the transmit worked with the original mic plug.  Thanks for any help.  Regards, Lisa Davis  KC9BG

Re: Gordon Gibby Digital Interface

Gordon Gibby <ggibby@...>
 

 I’m sorry, I didn’t see your email. The 1475 seems to be a truly low end sound card. I’m not an expert and probably someone could recommend something much much better. 

 In one of my books online it tells you how to open it up and solder to the right connections so you can avoid having to use the jacks.    

 Every chance I get, that’s how I make the connection! The jacks and plugs always come loose at the worst time    

 I would love it if someone could tell us if there’s a better sound card, then we could start figuring out how to integrate it. 




Re: Multiple I2C devices with Raduino

Jerry Gaffke
 

You want one set of pullups to 3.3v on the i2c bus, the ones on the Raduino for the si5351 are sufficient for this.

That i2c bus is relatively slow, if you load it down with traffic from Nano to Teensy it may become too slow.
At that point, I'd recommend completely replacing the Nano with the Teensy somehow.
Maybe sooner, as it is usually easiest to just have all firmware on one processor.

W0EB reports that they have the Teensy driving the uBitx, available as a kit:  
    https://groups.io/g/BITX20/topic/34443691
That sounds like a great way to go.

Jerry, KE7ER



On Thu, Oct 10, 2019 at 04:43 AM, Rob French (KC4UPR) wrote:
Hello,

I am looking to have multiple devices communicating via I2C with my stock Raduino.  Currently, I have of course the Si5351 on the Raduino, and I also have an I2C backpack on my slave.  The I2C backpack is a 5v unit, so I have removed it's onboard SDA/SCL pullup resistors, and so it shares the two 2.2k resistors on the Raduino.  

I am about to add a Teensy 3.2 into the mix, communicating as an I2C slave with the Raduino.  The Teensy documentation mentions that external pullups are required when using I2C.  I *think* this can also be the 2.2k resistors on the Raduino, but I just want to make sure.  Am I correct?  (Essentially the Teensy would be hooked up similarly to the second Arduino in this KD8CEC drawing, albeit with additional functions.)

http://4.bp.blogspot.com/-AZEv4ZFFX5o/XK9LsxTH5yI/AAAAAAAARDE/SRUZvN58P6cROA4Ul3b5vR5I4Z6O9qq6wCK4BGAYYCw/s1600/circuit2.png

Kit-Projects Restock

 

Hello all,

 We have restocked the digital interfaces, Mic housings, Mini paddles and relay boards.

Interfaces: https://shop.kit-projects.com/index.php?route=product/product&path=59&product_id=120

Relay Boards: https://shop.kit-projects.com/index.php?route=product/product&path=59&product_id=119


Announcement: As of 10/10/2019 The relay boards we have left is all we plan to make they will be discontinued once they are sold. I may have a few boards left after the kits sell out but once they are gone they are gone.

The Digital Interface boards we have up will be the last run for a little while as I rework the board for better labels and re-route a few pads.

73

--
David

 N8DAH
Kit-Projects.com

Shop is open!

uButx and JackAl stuff SOLD

Lee
 

All the stuff has been Sold
--
Lee - N9LO  "I Void Warranties"

 

Multiple I2C devices with Raduino

Rob French (KC4UPR)
 

Hello,

I am looking to have multiple devices communicating via I2C with my stock Raduino.  Currently, I have of course the Si5351 on the Raduino, and I also have an I2C backpack on my slave.  The I2C backpack is a 5v unit, so I have removed it's onboard SDA/SCL pullup resistors, and so it shares the two 2.2k resistors on the Raduino.  

I am about to add a Teensy 3.2 into the mix, communicating as an I2C slave with the Raduino.  The Teensy documentation mentions that external pullups are required when using I2C.  I *think* this can also be the 2.2k resistors on the Raduino, but I just want to make sure.  Am I correct?  (Essentially the Teensy would be hooked up similarly to the second Arduino in this KD8CEC drawing, albeit with additional functions.)

http://4.bp.blogspot.com/-AZEv4ZFFX5o/XK9LsxTH5yI/AAAAAAAARDE/SRUZvN58P6cROA4Ul3b5vR5I4Z6O9qq6wCK4BGAYYCw/s1600/circuit2.png

Re: Speaker feedback

 

Probably the wire from your add on circuit and the volume control is picking up RF. Try using a shielded wire.

At 10-10-19, you wrote:
Solved! I built the simple s meter circuit from the hamskey site a couple weeks ago and that circuit is the problem, I just hadn't noticed the feed back it produced. Thanks MVS Sharma for the clue as this little circuit also connects to the high side of the volume pot. I removed it and we're back to normal now. Just not compatable with v5 board I guess.
Cheers all

Re: Speaker feedback

Maurice Bersan
 

Solved! I built the simple s meter circuit from the hamskey site a couple weeks ago and that circuit is the problem, I just hadn't noticed the feed back it produced. Thanks MVS Sharma for the clue as this little circuit also connects to the high side of the volume pot. I removed it and we're back to normal now. Just not compatable with v5 board I guess.
Cheers all 

Re: Speaker feedback

Maurice Bersan
 

Thanks for the replies so far. I have checked antenna etc using another radio but no faults found. I'm wondering if I have had this issue from the beginning. It only occures when I get up close and personal to the mike or blow into it that I notice any feed back through the speaker. Anyone else noticed this?
Cheers
Maurice

Re: New file uploaded to BITX20@groups.io

Doug W
 

Very nice Peter.  Were you able to do any testing for spurs and/or harmonics?
--
www.bitxmap.com

New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that the following files have been uploaded to the Files area of the BITX20@groups.io group.

Uploaded By: G8HAV <g8hav@...>

Description:
M0HYT Build: This is one of twelve builds (not all completed) using the M0HYT PCB gerber files. We sent to China and had them made at a cost of about 8 GBP. The quality was excellent. This build puts out 10 W on 80 & 40 M and 8 W on 20 M. The big relay is temporary as the original burnt out the contacts when I accidentally blew the finals. It was an excellent club project.

Cheers,
The Groups.io Team

Re: New adapter kit from TSW #radiuno #ubitx

Jim Sheldon
 

Considering the Teensy 4 is mounted upside down on the back of the adapter to keep it in order with the upside down NANO on the current Raduinos, the Audio Adapter probably won't be mountable. 

Besides, I've seen quite a few negative reviews on internal noise, hum, etc caused by poor connections to the updated Teensy Audio Adapter.  Right now, we seem to have gotten lucky with our T4 to NANO adapter and it seems to clear up tuning clicks and a lot of other digital noise that was caused by the NANO.  For the time being, we don't want to take too many chances on messing that up.

Not saying there isn't noise associated with the T4-Nano adapter, but in lots of testing prior to the release announcement, and using an open frame, unshielded uBITX version 5 for testing, atmospheric noise from the receiver masked any there might be.

Until I got the BFO adjusted, I did hear a few, very faint tuning clicks but once the alignment was finished, I only heard signals received through the antenna.  However, depending on construction techniques used, your mileage may certainly vary.

Jim - W0EB

Re: New adapter kit from TSW #radiuno #ubitx

Rob French (KC4UPR)
 

I haven't tried comparing the pinouts, but what's the chance it will be compatible with the Teensy Audio Adaptor for the Teensy 4.0?

Re: New adapter kit from TSW #radiuno #ubitx

Jim Sheldon
 

Much faster, less digital noise and WAY more programming memory.

On Oct 8, 2019, at 1:04 PM, Justin Phillips <dolmdemon@...> wrote:

As a ubitx newbie.. what's the benefit to using the teensy over the nano?

Justin
K5AXL

On Tue, Oct 8, 2019, 10:43 AM Jim Sheldon <w0eb@...> wrote:
I just announced on the TSW (Triumvirate Skonk Worx) website, www.w0eb.com that our TSW consortium has successfully created an adapter that will allow the new PJRC Teensy 4.0 to directly replace the NANO MPU on the TSW Raduino Clone and by the same token, the later factory Raduino's where the NANO is mounted on the rear of the card. 

Our programmer has also successfully ported (with only minor modifications, see the website) the factory's V4.3 and V5.1 software to the Teensy 4.0.  You will still need to be familiar with the factory's documentation for V4.3 and V5.1 (whichever you use) as we only documented our changes in the accompanying manuals for the software.

A bare board and also a complete kit of parts for the plug in adapter is being offered for sale on the TSW website for anyone interested.  Kits are now available, see the website for details.

Right now the kits are only being offered to US customers as the pricing includes shipping and I still need to determine the bottom line for international shipping to offer them to international customers.  US First Class Mail international, small package costs run anywhere from about $11 to $15 for 5 ounces or less depending on country of delivery and some countries are prohibited.

Jim Sheldon, W0EB
TSW Project Coordinator

Re: New adapter kit from TSW #radiuno #ubitx

Jim Sheldon
 

Seems to eliminate many of the problems caused by the NANO's on board oscillators.  Not saying there aren't any, but I didn't notice them during testing.

Re: New adapter kit from TSW #radiuno #ubitx

Jim Sheldon
 

Sorry, but NO. That's KD8CEC's domain.  It's up to him to support his own software.

Jim

Re: Gordon Gibby Digital Interface

Sascha Bohnet | DL5SMB
 

I just realized I wrote something confusing:

I tapped the mic line from C60 and ground and the RX line from the hot end of the poti and ground. Just to point it out.