Date   

Re: Sticking TX/RX Relay UBITX V 6

Curt
 

Ed

I suggest trying different bands and antennas, if you have more than one, before blaming the relay. Another possibility is RF feedback into the raduino. If indeed you have a stuck relay, as I did once, gently tap on it. Mine was cured, so far okay.

If you study the board, you can see which relays belong to the low pass filters, then the TR relay will stand out.

Curt


Re: Sticking TX/RX Relay UBITX V 6

 

Hi,

What did you do to get the relay back in receive mode?

73


Re: Sticking TX/RX Relay UBITX V 6

Dale Parfitt
 

While I am new to the forum and have not heard of that issue- you may want to look at the voltage on the coil and make certain that it is not holding the relay into the TX position. Others, more knowledgeable can likely chime as to in whether that is even a possibility.

 

Dale W4OP

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of edwarduncleshrek via groups.io
Sent: Thursday, May 14, 2020 8:01 PM
To: BITX20@groups.io
Subject: [BITX20] Sticking TX/RX Relay UBITX V 6

 

Hi All,

 

I have been trying to make CW contacts on 40 meter over the last few weeks, only to find that the TX/RX relay started sticking in the transmit position after sending CQ's.  This last time I thought the relay had give up the ghost.  I finally got the relay back into the receive mode.  Here is my questions:  Is the UBITX V6 schematic on the HF Signals website correct?  As I read that schematic the TX/RX relay is K3?  Is there any remedial action that I can take to fix the relay or is it a remove and replace only option?   

 

The reason I ask is in reading the many group post, I found one that said the HF Signals UBITX V6 schematic was wrong do not use.  If this is the case can someone direct me to the correct UBITX V6 schematic and the location of the TX/Rx relay on the board.  

 

Thanks much for the help,

 

Ed    


Sticking TX/RX Relay UBITX V 6

edwarduncleshrek@...
 

Hi All,

I have been trying to make CW contacts on 40 meter over the last few weeks, only to find that the TX/RX relay started sticking in the transmit position after sending CQ's.  This last time I thought the relay had give up the ghost.  I finally got the relay back into the receive mode.  Here is my questions:  Is the UBITX V6 schematic on the HF Signals website correct?  As I read that schematic the TX/RX relay is K3?  Is there any remedial action that I can take to fix the relay or is it a remove and replace only option?   

The reason I ask is in reading the many group post, I found one that said the HF Signals UBITX V6 schematic was wrong do not use.  If this is the case can someone direct me to the correct UBITX V6 schematic and the location of the TX/Rx relay on the board.  

Thanks much for the help,

Ed    


Re: 160m filter

Bill Cromwell
 

I went back and looked at the download process. I saw that they do support Linux. I have to find where they hid the price. There is a 30 day free trial that won;t help much. I might be able to learn a little about it and then have it expire. Been there - done that. So depends on what kind of pricing I find :)

Thanks for pointing it out.

73,

Bill KU8H

On 5/14/20 4:11 PM, Dale Parfitt wrote:
Hi Bill,
Agilent/Keysight Genesys is the ultimate simulator/synthesizer software tool. Not only does it design the filter to your requirements, it allows for tuning the components (with real world Q and D). The graphs (of your choice) change in real time as you tune. So one can say, optimize the Return Loss spec across 160M while seeing the impact of filter loss across the rest of the graph. Does thermal and Monte Carlo analysis- anything you can imagine. Then generates the PCB Gerber file using your components.
https://www.keysight.com/us/en/products/software/pathwave-design-software/pathwave-rf-synthesis-software.html
Dale W4OP
-----Original Message-----
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Bill Cromwell
Sent: Thursday, May 14, 2020 3:55 PM
To: BITX20@groups.io
Subject: Re: [BITX20] 160m filter
Hi Dale,
You might find something useful on the QRP Labs site. Look at their low
pass filter kits. You can buy the parts or roll your own from their
directions. I have a set as I am awaiting the QSX kit when it comes out.
73,
Bill KU8H
On 5/14/20 3:27 PM, Dale Parfitt wrote:
We are on the same page Bill. The bitx finals are Push pull so that helps us with the 3rd 160M harmonic= 5.4- 6MHz. and up. That means a low order 160M LP elliptic filter with a zero in the 3.6-4MHz spectrum should do it. Time to spend some time in Gensys simulation/synthesis and get the spectrum analyzer on the uBitx unless someone else has already done the SA work.

Dale W4OP
--
bark less - wag more


Re: 160m filter

Bill Cromwell
 

Hi Dale,

I followed the link and the first thing I saw was MS Windows. It might run on my computers under WINE. I will eventually find out.

73,

Bill KU8H

On 5/14/20 4:11 PM, Dale Parfitt wrote:
Hi Bill,
Agilent/Keysight Genesys is the ultimate simulator/synthesizer software tool. Not only does it design the filter to your requirements, it allows for tuning the components (with real world Q and D). The graphs (of your choice) change in real time as you tune. So one can say, optimize the Return Loss spec across 160M while seeing the impact of filter loss across the rest of the graph. Does thermal and Monte Carlo analysis- anything you can imagine. Then generates the PCB Gerber file using your components.
https://www.keysight.com/us/en/products/software/pathwave-design-software/pathwave-rf-synthesis-software.html
Dale W4OP
-----Original Message-----
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Bill Cromwell
Sent: Thursday, May 14, 2020 3:55 PM
To: BITX20@groups.io
Subject: Re: [BITX20] 160m filter
Hi Dale,
You might find something useful on the QRP Labs site. Look at their low
pass filter kits. You can buy the parts or roll your own from their
directions. I have a set as I am awaiting the QSX kit when it comes out.
73,
Bill KU8H
On 5/14/20 3:27 PM, Dale Parfitt wrote:
We are on the same page Bill. The bitx finals are Push pull so that helps us with the 3rd 160M harmonic= 5.4- 6MHz. and up. That means a low order 160M LP elliptic filter with a zero in the 3.6-4MHz spectrum should do it. Time to spend some time in Gensys simulation/synthesis and get the spectrum analyzer on the uBitx unless someone else has already done the SA work.

Dale W4OP
--
bark less - wag more


Re: should I keep bitxmap.com going?

Dave Esquer
 

Yep, didn't know about it! Added myself here in Running Springs, CA. 

𝝁BITX v6.1

Thanks,
Dave, K6WDE


Re: should I keep bitxmap.com going?

pat griffin
 

I had forgotten about this web site and how handy it is.  I vote to keep it going if you can.  Boy, it would be nice to have a reference to it on the ubitx web site so potential users could get an idea of what they are missing.
73,
Pat AA4PG

Pat Griffin
http://www.cahabatechnology.com/aa4pg.html


From: BITX20@groups.io <BITX20@groups.io> on behalf of Doug W <dougwilner@...>
Sent: Thursday, May 14, 2020 8:24 AM
To: BITX20@groups.io <BITX20@groups.io>
Subject: [BITX20] should I keep bitxmap.com going?
 
About 3 years ago I set up bitxmap.com as a way for us to show the world wide spread of BITX enthusiasts.  To date we have over 500 operators on the map and over 33,000 views.  It is a google map with a simple redirect on the domain so there is no hosting cost.  The domain however is up for renewal again.  I am happy to keep it going if it is still being used and anyone finds value in it.  I am also willing to bet that since the initial excitement has died down anyone new to the BITX community doesn't even know it exists.  So my questions to the group are, do you use the map?  Should I keep it going?  I always intended this to be an open project so if someone else wants to do something bigger with it I would be happy to transfer the domain as long as you keep it open and free.
--
www.bitxmap.com


Re: should I keep bitxmap.com going?

g.hansford@...
 

This web site was unknown to me.  I just added my details, please keep it active.

Geoff VK3LZ


Re: should I keep bitxmap.com going?

Dennis Zabawa
 

Yes Please!


Re: 160m filter

Dale Parfitt
 

Hi Bill,
Agilent/Keysight Genesys is the ultimate simulator/synthesizer software tool. Not only does it design the filter to your requirements, it allows for tuning the components (with real world Q and D). The graphs (of your choice) change in real time as you tune. So one can say, optimize the Return Loss spec across 160M while seeing the impact of filter loss across the rest of the graph. Does thermal and Monte Carlo analysis- anything you can imagine. Then generates the PCB Gerber file using your components.
https://www.keysight.com/us/en/products/software/pathwave-design-software/pathwave-rf-synthesis-software.html

Dale W4OP

-----Original Message-----
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Bill Cromwell
Sent: Thursday, May 14, 2020 3:55 PM
To: BITX20@groups.io
Subject: Re: [BITX20] 160m filter

Hi Dale,

You might find something useful on the QRP Labs site. Look at their low
pass filter kits. You can buy the parts or roll your own from their
directions. I have a set as I am awaiting the QSX kit when it comes out.

73,

Bill KU8H

On 5/14/20 3:27 PM, Dale Parfitt wrote:
We are on the same page Bill. The bitx finals are Push pull so that helps us with the 3rd 160M harmonic= 5.4- 6MHz. and up. That means a low order 160M LP elliptic filter with a zero in the 3.6-4MHz spectrum should do it. Time to spend some time in Gensys simulation/synthesis and get the spectrum analyzer on the uBitx unless someone else has already done the SA work.

Dale W4OP
--
bark less - wag more


Re: 160m filter

Bill Cromwell
 

Hi Dale,

You might find something useful on the QRP Labs site. Look at their low pass filter kits. You can buy the parts or roll your own from their directions. I have a set as I am awaiting the QSX kit when it comes out.

73,

Bill KU8H

On 5/14/20 3:27 PM, Dale Parfitt wrote:
We are on the same page Bill. The bitx finals are Push pull so that helps us with the 3rd 160M harmonic= 5.4- 6MHz. and up. That means a low order 160M LP elliptic filter with a zero in the 3.6-4MHz spectrum should do it. Time to spend some time in Gensys simulation/synthesis and get the spectrum analyzer on the uBitx unless someone else has already done the SA work.
Dale W4OP
--
bark less - wag more


Re: 160m filter

Dale Parfitt
 

We are on the same page Bill. The bitx finals are Push pull so that helps us with the 3rd 160M harmonic= 5.4- 6MHz. and up. That means a low order 160M LP elliptic filter with a zero in the 3.6-4MHz spectrum should do it. Time to spend some time in Gensys simulation/synthesis and get the spectrum analyzer on the uBitx unless someone else has already done the SA work.

Dale W4OP

-----Original Message-----
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Bill Cromwell
Sent: Thursday, May 14, 2020 3:03 PM
To: BITX20@groups.io
Subject: Re: [BITX20] 160m filter

That's how it looks to me Dale. An 80 meter low pass filter isn't
helping much with the 160 meter band until we get to that third harmonic
and higher. An external filter also helps on receive :)

73,

Bill KU8H

On 5/14/20 2:37 PM, Dale Parfitt wrote:
*So as is, when one tunes to 160M, is there any LPF selected? I would
guess that if one starts at 80M and tunes down to 160M, then the 80M LPF
is still in the circuit?*

Tnx,

Dale W4OP
--
bark less - wag more


Re: 160m filter

Bill Cromwell
 

That's how it looks to me Dale. An 80 meter low pass filter isn't helping much with the 160 meter band until we get to that third harmonic and higher. An external filter also helps on receive :)

73,

Bill KU8H

On 5/14/20 2:37 PM, Dale Parfitt wrote:
*So as is, when one tunes to 160M, is there any LPF selected? I would guess that if one starts at 80M and tunes down to 160M, then the 80M LPF is still in the circuit?*
Tnx,
Dale W4OP
--
bark less - wag more


Re: 160m filter

Bill Cromwell
 

Hi,

I had the joy of using much older gear (and still do). We had to turn off the power, open the cabinet, change some plug-in parts, close the box, and turn it back on to do a band change. And not forget to change the antenna. I use some external filters with my V3 and changing those for a band change seems trivial by comparison. I have thought about using the multiplex chips to expand the three line to (up to) eight. Those lines could be extended outside the cabinet (mine is tight) where they can control external filters, change bands in the kilowatt amp, change the antenna, and warm the coffee.

73,

Bill KU8H

On 5/14/20 2:31 PM, MadRadioModder wrote:
Very much preferred.
*From:*BITX20@groups.io [mailto:BITX20@groups.io] *On Behalf Of *Reed N
*Sent:* Thursday, May 14, 2020 12:53 PM
*To:* BITX20@groups.io
*Subject:* Re: [BITX20] 160m filter
Mick,
If you're willing to hack it in, you can use the 3 digital outs to control a 2-to-4 or 3-to-8 chip, rather than directly connect to the relays.
Reed
<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
--
…_. _._
--
bark less - wag more


Re: add yourself to the new BITX operators map

Bill Cromwell
 

I'm in too

73,

Bill KU8H

On 5/14/20 2:18 PM, Stephen KO4CVU wrote:
KO4CVU shows up in Middle TN now.
_._,_._,_
--
bark less - wag more


Re: 160m filter

Dale Parfitt
 

 

So as is, when one tunes to 160M, is there any LPF selected? I would guess that if one starts at 80M and tunes down to 160M, then the 80M LPF is still in the circuit?

 

Tnx,

Dale W4OP


Re: 160m filter

MadRadioModder
 

Very much preferred.

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Reed N
Sent: Thursday, May 14, 2020 12:53 PM
To: BITX20@groups.io
Subject: Re: [BITX20] 160m filter

 

Mick,

If you're willing to hack it in, you can use the 3 digital outs to control a 2-to-4 or 3-to-8 chip, rather than directly connect to the relays.


Reed


Virus-free. www.avg.com

--

…_. _._


Re: add yourself to the new BITX operators map

Stephen KO4CVU
 

KO4CVU shows up in Middle TN now.


Re: uBiTX #v6 - First steps after assembly #v6

Reed N
 

Hi Urs,

On my software, if you hold the tuner button down when you power on, it goes into calibration mode, as I think you already encountered.

The PDQ GFX branch is outdated vs the master branch. All of that functionality is already merged. I left it there since there are some links directly to it. You're welcome to use it, and it should work, but it's less featured, and has some of the stock software quirks.

I'm rather perplexed by the knob issues you're having. I've never encountered latency on the buttons and knob encoder, and am unsure where or how that would happen. It's directly connected, and is interrupt-driven, so it should be one of the fastest parts. I wonder if there's something up with the nano itself. I don't suppose you have another nano to test with? I know you said you checked the encoder, but perhaps consider trying a different encoder as a sanity check too?


Reed