Date   
Re: Kit-Projects ND6T Ubitx AGC

digger AB3XU
 

Finally had time to get back to this for the second time. I accidentally deleted the first post I made of this a week ago.
Here is another set of test results with the AGC board vol-hi connected to to TP21 on the uBITX via a resistor.
(remember this is a V4 board)

I made three sets of measurements
1. AGC off
2. AGC-slow and a resistor value of 11.5 ohms
3. AGC-slow and a resistor value of 5.75 ohms

11.5 ohms is the closest I had to the 10 ohms Tim suggested.
Hoping to get a little higher levels for the S-Meter a 5.75 ohms (2x11.5 in parallel) was tested to see if it would increase the bias voltage and in turn the ADC reading.

Interestingly the measurements was almost exactly the same with both resistors. There looked like a very slight instability on the oscope with 5.75 ohms. after the fact that may have been due to a poor connection. In any case I'm going to stick with the 11.5 ohm resistor

From the measurements its pretty clear the AGC is doing its job and is pretty effective for about 50db. It looks like it kicks in by S9+10
and continues to work to at least S9+50. By S9+60 it has given up. Maybe someone else can use the measurements to come up with some useful numbers.

Bottom line is -- connecting the AGC board to TP21 through a resistor of about 10 ohms works for me and I'm a happy clam, I mean ham. I would though love to see some one else replicate these tests.

73 digger AB3XU

Re: HFSignals poor business practices

ke6bgn@...
 

The package was in pristine shape, so I don't think it was done during shipping. I only found it by looking through magnifiers.
I wanted to go this route because of my failing eyesight, I can't do that type of fine work, like winding small toroids, any longer.
But the big point was the absolute, total lack of support. Like I said, I am underwhelmed.

73 de RC.....KE6BGN 

FS: JackAl kit

TomW4OKW
 

Advancing arthritis, etc., has put my plans for this project on hold.  New in the box, so to speak, parts as received from suppliers.

JackAl Board
Teensy 3.6
Audio board for Teensy
5" TFT Display

About $135 worth of stuff, mailed to you for $100.

Tom W4OKW
301-904-2053

Re: FS: JackAl kit

Bob Villa
 

Can you provide email for contact?

Miguel WP4ZI


On Mon, Jun 3, 2019 at 19:11, TomW4OKW
<w4okw@...> wrote:
Advancing arthritis, etc., has put my plans for this project on hold.  New in the box, so to speak, parts as received from suppliers.


Teensy 3.6
Audio board for Teensy
5" TFT Display

About $135 worth of stuff, mailed to you for $100.

Tom W4OKW
301-904-2053

Microphone audio leaking into speaker

Jay - WS4JM
 

I installed an SSM2167 pre-amp processor on my V3 uBitx. I am getting microphone audio into the speaker. It only appears from about 1/2 to 7/8 of the volume pot range. Verified with my scope. It does not go out over the air, verified by QSOs. Reducing the mic gain reduces the leakage, but does not eliminate it (also as seen on the scope). More of an annoyance than anything, but it would be nice to get rid of it, because it is in the "sweet spot" for listening.

Any ideas?

Thanks,
WS4JM
Jay

Re: Availability of Mag Loop and other stuff...

Tom, wb6b
 

On Mon, Jun 3, 2019 at 12:31 PM, Kees T wrote:
Speaking of using Noise Bridges, there is an excellent one by N6DT
I recently received this noise source and "reflection" bridge to do antenna testing.

https://www.ebay.com/itm/ORIGINAL-RF-SWR-Reflection-Bridge-0-1-3000-MHZ-Antenna-Analyzer-VHF-UHF-VSWR/292083525131

https://www.ebay.com/itm/2018-new-version-noise-source-Simple-spectrum-external-tracking-source/111392810099

Tom, wb6b

Re: Microphone audio leaking into speaker

Joe Puma
 

I have a V3 and use the same mic amp and I have the same problem.  I too would like to get rid of the problem. When I crank the mic pot up it feedbacks with audio bleeding through. Its pretty depressing lol. 

Joe
Kd2nfc 





On Jun 3, 2019, at 8:37 PM, Jay - WS4JM <ws4jm@...> wrote:

I installed an SSM2167 pre-amp processor on my V3 uBitx. I am getting microphone audio into the speaker. It only appears from about 1/2 to 7/8 of the volume pot range. Verified with my scope. It does not go out over the air, verified by QSOs. Reducing the mic gain reduces the leakage, but does not eliminate it (also as seen on the scope). More of an annoyance than anything, but it would be nice to get rid of it, because it is in the "sweet spot" for listening.

Any ideas?

Thanks,
WS4JM
Jay

Re: HFSignals poor business practices

ke6bgn@...
 

Arv,
I took a look at the HFSignals web site and specifically the BITX40 pages too, that's why I took the route that I did.
I sent my email to hfsignals email because it was not a technical issue I wanted resolved, but a matter dealing with the condition of the product that I purchased. I wanted to know how they would resolve the issue, since I received a defective unit. I didn't need any of the collective wisdom to sort out a technical problem.
As I stated before, due to my eyesight, winding and soldering such a small item would be fools folly for me.
I'm just going to let the damned thing sit in the dark until it fixes itself.

73 de RC.....KE6BGN

Re: HFSignals poor business practices

Arv Evans
 

On-line information can read by using features of the computer to magnify text and image size.  If available, a large screen TV usually can be connected to your computer to show things in larger format.  

Todays kids are more smart than we sometimes realize.  Convincing a grandchild to help with small parts  can be a productive way to get your transceiver working and at the same time introduce them to ham radio.  

I will leave it up to Farhan to comment on replacement parts, shipping costs, etc. 

Arv
_-_
 

On Mon, Jun 3, 2019, 7:19 PM <ke6bgn@...> wrote:
Arv,
I took a look at the HFSignals web site and specifically the BITX40 pages too, that's why I took the route that I did.
I sent my email to hfsignals email because it was not a technical issue I wanted resolved, but a matter dealing with the condition of the product that I purchased. I wanted to know how they would resolve the issue, since I received a defective unit. I didn't need any of the collective wisdom to sort out a technical problem.
As I stated before, due to my eyesight, winding and soldering such a small item would be fools folly for me.
I'm just going to let the damned thing sit in the dark until it fixes itself.

73 de RC.....KE6BGN

Re: BITX 40 not tuning

lbjunk@...
 

Please disregard my previous call for help. The potentiometers that came with the kit were faulty, once I replace them the radio worked great. 

Thanks. 


On Thu, May 30, 2019 at 4:28 PM, lbjunk via Groups.Io <lbjunk@...> wrote:
I wired up the BITX 40 and triple checked my wiring, it is correct as far as I can tell.  When I power it on the frequency is stuck on 7.106...  I am unable to change the frequency.  Any help or ideas would be appreicated.


Re: HFSignals poor business practices

Michael Walker
 

I have to speak up on this one

These public floggings of someone trying to run a business (mom and pop shop) is a bad normal and I want to speak up on behalf of HFSignals.

What not discuss it with the business one on one rather than complaining to the masses.

Give them a chance to do the right thing.  If you don't like it, ask the vendor what your options are.

Businesses like this are just trying to make a living or even support their love for the hobby.  With venting on a large forum like this, how do you think it affects them?  Imagine if you were in your shoes with the same budget to deal with.

Mike va3mw


Re: HFSignals poor business practices

RICHARD
 

If it is a bitx 40 send it to me and I will fix and test for free you pay return postage.  I have built several of these and have mod some for 80 and 160 meters.  I’m 80 years old.

K6KWQ

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of ke6bgn@... <ke6bgn@...>
Sent: Monday, June 3, 2019 3:02:30 PM
To: BITX20@groups.io
Subject: Re: [BITX20] HFSignals poor business practices
 
The package was in pristine shape, so I don't think it was done during shipping. I only found it by looking through magnifiers.
I wanted to go this route because of my failing eyesight, I can't do that type of fine work, like winding small toroids, any longer.
But the big point was the absolute, total lack of support. Like I said, I am underwhelmed.

73 de RC.....KE6BGN 

Re: HFSignals poor business practices

MVS Sarma
 

Richard,
Wish you a happy and healthy Century. It is proudto see you assuring fiing thngs at your age.  Of course i am at 74. Still sble to manage.
Regards
Sarma vu3zmv

On Tue, 4 Jun 2019, 8:01 am RICHARD <k6kwq@... wrote:

If it is a bitx 40 send it to me and I will fix and test for free you pay return postage.  I have built several of these and have mod some for 80 and 160 meters.  I’m 80 years old.

K6KWQ

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of ke6bgn@... <ke6bgn@...>
Sent: Monday, June 3, 2019 3:02:30 PM
To: BITX20@groups.io
Subject: Re: [BITX20] HFSignals poor business practices
 
The package was in pristine shape, so I don't think it was done during shipping. I only found it by looking through magnifiers.
I wanted to go this route because of my failing eyesight, I can't do that type of fine work, like winding small toroids, any longer.
But the big point was the absolute, total lack of support. Like I said, I am underwhelmed.

73 de RC.....KE6BGN 

Re: Microphone audio leaking into speaker

 

Hook up the SSM2167 board to TX 12V line. This way it will be off while receiving.

Raj

At 04-06-19, you wrote:
I installed an SSM2167 pre-amp processor on my V3 uBitx. I am getting microphone audio into the speaker. It only appears from about 1/2 to 7/8 of the volume pot range. Verified with my scope. It does not go out over the air, verified by QSOs. Reducing the mic gain reduces the leakage, but does not eliminate it (also as seen on the scope). More of an annoyance than anything, but it would be nice to get rid of it, because it is in the "sweet spot" for listening.

Any ideas?

Thanks,
WS4JM
Jay

Re: Microphone audio leaking into speaker

Olivier Grand
 

Hello !
And Hook up the LM386 to RX 12V line. This way it will be off while transmitting.
Olivier.

Garanti sans virus. www.avast.com


Le mar. 4 juin 2019 à 06:32, Raj vu2zap <rajendrakumargg@...> a écrit :
Hook up the SSM2167 board to TX 12V line. This way it will be off while receiving.

Raj

At 04-06-19, you wrote:
>I installed an SSM2167 pre-amp processor on my V3 uBitx. I am getting microphone audio into the speaker. It only appears from about 1/2 to 7/8 of the volume pot range. Verified with my scope. It does not go out over the air, verified by QSOs. Reducing the mic gain reduces the leakage, but does not eliminate it (also as seen on the scope). More of an annoyance than anything, but it would be nice to get rid of it, because it is in the "sweet spot" for listening.
>
>Any ideas?
>
>Thanks,
>WS4JM
>Jay




Implications of doing a "factory reset" on ubitx....

Mark Hatch
 

Probably did something dumb....  While working on getting a 5" set of Nextion's screens for KD8CEC, I came across the button in the menu area for "factory" reset. And not believing the 3 challenge questions, I went ahead and "did it".

So what did I lose in doing this? Was there some magical individual calibration (BFO or LO?) on my unit that went back to a default value that now needs to be "tuned"?

Feeling very dumb...

73
Mark
AJ6Cu

CW Tone change to 700Hz using KD8CEC firmware. #ubitx-help #ubitxcw #calibration

derek (G4VWI)
 

Can someone outline how to alter the CW Tone offset frequency from 800Hz to 700Hz using the KD8CEC firmware please.

I am confused by the conflicting data presented in the CW setup. Frequency and BFO calibration appear to be good but having fitted a filter for CW centred on 700Hz I need to alter the "tone". Does the second display show the side tone frequency or does this set the CW offset?

When changing from LSB to CWL I see the 800Hz change in displayed frequency as expected from the memory manager settings and from the data shown in the bottom left hand grid on the TFT display (800Hz).  Using the "menu" button on the encoder I can't seem to find a CW Tone(offset) function. I am concerned NOT to upset the calibration settings elsewhere. Can this be set within the KD8CEC or memory manager? Not sure what the latest version is!

Thanks Derek G4VWI

Re: CW Tone change to 700Hz using KD8CEC firmware. #ubitx-help #ubitxcw #calibration

Vic WA4THR
 

You should be able to set the CW offset by entering 700 in the Nextion CW menu where it says CW Tone. I suspect it is ignoring the 65535 shown there now as an invalid number. You can also do this from the Memory Manager down in the CW section where it looks for the CW Side Tone. If that is blank, that may be where the 65535 gets interpreted. The third way is accessing the setup menu by pressing the encoder button for the menu, selecting setup menu on, then pressing it again and rotating until you see Change CW Tone.

If you have properly selected to offset the receiver when in CW mode, as indicated by your VFO changing from when in SSB, then the CW tone for receive is also used for your receiver offset. None of this should affect your BFO or calibration.

=Vic=

Re: Implications of doing a "factory reset" on ubitx....

Vic WA4THR
 

As I understand it, if you were properly calibrated before converting to the CEC sketch, the program should have stored those values and that is what gets used for insertion if you do a factory reset. If you did not, whatever was previously programmed (as from the factory, for example) will be what is loaded if you do a reset. Both the Calibration and BFO values are what is replaced. If after doing a reset you find it is off frequency or the BFO is off, then you will need to redo the calibration.

=Vic=

Re: Microphone audio leaking into speaker

John (vk2eta)
 

Or use the disable pin as per that post:
https://groups.io/g/BITX20/message/45897

73, John