Oh yeah¡ the downside of being hosted on a shared server. I remember this biting me years ago and having to move to a new web hosting service. Seems that some of your brethren are compromising servers and you¡¯re caught up in the mess they created. This is a common problem in the Asia-PAC region where the majority of criminal scams originate.
I feel for you¡ it drove me crazy for months too.
Hans, I see you are blacklisted by two of the lists. You can check you status here:
There were changes to the hoops that we
had to jump through to get emails to go a few months ago, I
started getting messages from gmail saying this.
Went to my mail server provider, IONOS
and got it set up.? Just changing a few server settings at their
end, all semi automated.? Perhaps this is the same.
Chris, G5CTH
On 12/09/2023 17:01, Hans Summers
wrote:
Hello Billy
I don't think that is related to .
Your messages on are coming through just
fine. The problem is emails sent from QRP Labs shop are
accused of being spam by some email providers (now including
Gmail).?
On Tue, Sep 12, 2023 at
6:58?PM N5SE < bwmoore@...>
wrote:
Hans,
I just found out why I can no longer use . I am in the same
situation that Colin was in.
Thanks for the suggestions Colin...?
Hopefully I can find a solution soon.?
Hans, I used to send all my email from a server I
owned. There was a period where it wasn¡¯t getting
through. I was only sending private correspondence
and no business emails at all. After months of
digging I found that my web host shared one server
with a lot of other websites. Of course this is
common. It only took one of them to start spamming
people for the filters to mark all emails from all
of this websites on that server as spam. In my
case physically moving to a different server in
there block fixed it.
Following these rules helps a lot, and not just
with gmail:?
--
Colin - K6JTH?
--
N5SE
Billy Wayne Moore
Phone: 936-537-2975???
--
Colin - K6JTH?
|
Re: #QMX #QDX #QDX-M output transformers (WTST and RWTST) documentation
#qmx
#qdx
#QDX-M
Thank you Hans.
After reading the doc I take it that the improvement for low band units is not significant enough to warrant replacing the original type of transformer, yes?
toggle quoted message
Show quoted text
Hi all
Many thanks to Ross EX0AA for his transformer designs, the 3:3 ratio (9V operation) WTST (Weird Twisted Sisters Transformer) and 3:2 ratio (12V operation) RWTST (Really Weird Twisted Sisters Transformer).?
I have now uploaded documentation for both these designs and the original simple design, all in one document which is referenced from the QMX, QDX and QDX-M assembly manuals.?
The original purpose of the designs was to solve the parasitic resonance problem that sometimes reduced output power on 10m band on the high-bands QDX. However the improved symmetry and tighter coupling of these transformers does improve performance (put power, efficiency, suppression of even harmonics) on all versions of QMX, QDX and QDX-M. Therefore the twisted wire transformers are now the recommended build for all these transceiver kits.?
The transformer instructions are linked from each of the QMX, QDX and QDX-M pages. I removed the transformer instructions from the respective assembly manuals. So you will have to use the transformer document and choose the appropriate transformer (WTST for 9V, RWTST for 12V supply operation.?
|
Re: #qmx Antenna Tuner Can Kill PAs
#qmx
On Tue, Sep 12, 2023 at 11:34 AM, Gary W9TD wrote:
So instead of flat side down on the PCB they would be installed flat side up. Did that make any difference in heat removal?
The majority of the heat is conducted by the leads, mostly by whichever lead (usually the center) has the transistor die mounted on it.? Compared to that heat conduction through the plastic is minimal. 73, Don N2VGU
|
Re: Best ways to measure output power w/ an o'scope and access ground
On Tue, Sep 12, 2023 at 11:22 AM, Gary W9TD wrote:
I have 20 and 100 Watt 20dB attenuators
If terminated by 50¦¸, a 20dB pad makes a reasonably precise 10:1 voltage divider.? To do this I use a "50¦¸ feedthru termination" between the pad and 'scope input.? You can check/calibrate it with DC.? This one??should be good thru UHF at least.? This one claims 1GHz:?? 73, Don N2VGU
|
Re: QDX transmit troubleshooting advice¡
Hi John,
I am sure that IC5 has failed.? This is common when the BS170s fail.? Continuing to try to run the QDX could cause IC2 to fail and possibly other issues.? I would remove IC5 and verify that the receive current goes down and IC2 does not get overly warm.
73
Evan
AC9TU
|
Re: QMX Board pinout vs schematic and PSU voltages
Kees, You are correct. PB4 is vulnerable at the same time and for the same reasons as PD7. Further, as an analog input to an ADC, it is never given 5V tolerance, so its vulnerability extends throughout the operating interval. AN4899 section 5.2.1 discusses V(absmax) for this case, approximately 4 volts.
What I am lacking here is a tie-in to an observed failure. I will be looking.
The other ADC inputs associated with monitoring the three buck converter outputs also become vulnerable if the converter misbehaves.
JZ KJ4A?
JZ,
Following your logic, another point for a 3.6V Zener would be PB4 on the Micro for powering OFF.
73 Kees K5BCQ
|
Re: Best ways to measure output power w/ an o'scope and access ground
Your suggested alternative for tapping input is also a good solution, but there's absolutely nothing wrong with the method I proposed of using the high impedance probe and a cable tee below 50Mhz. It's perfectly flat if used with the supplied probes.
I don't mean to shout but this is important: IT MUST NOT BE USED WITH 50 Ohm TERMINATED CABLES or 1x probes. The probe adapter/dummy load is designed for use with the manufacturer supplied HIGH IMPEDANCE PROBE. Trying to run it at 50 ohms will result in a 25 ohm load and 50% of the power going into your scope cable and terminator.
It is NOT flat for VHF work and can be 3db down at 2 meters.
I showed both methods in my videos. I use a 50 ohm inline termination preceded by a 100w 10db attenuator and further 10 watt attenuators as required for working above the QRP level with this device and my other test equipment. This approach is more comfortably safe for 100watt transmitters and is more accurate at 2 meters and above. The scope in question is only rated to 200 Mhz.
No offence, but please don't give or criticize advice from others that you have not actually tried or demonstrated yourself.
M
|
Re: QDX transmit troubleshooting advice¡
John VK7JB,
I have TWO QDXs that both suffered the same fate as yours -- working perfectly, then mid-transmission death resulting in high current on receive (400 mA) and a hot IC2.? I removed the four BS170s but the high current remains.? IC5 may be the problem, or perhaps Q6 (the T/R switch).? But nothing other than IC2 seems hot.
Have you solved your problem and/or do you or others have suggestions for me?
Thanks so much and 73,
Kirk
W1FA
|
Re: QMX Board pinout vs schematic and PSU voltages
JZ,
Following your logic, another point for a 3.6V Zener would be PB4 on the Micro for powering OFF.
73 Kees K5BCQ
|
Re: #qmx Antenna Tuner Can Kill PAs
#qmx
On Tue, Sep 12, 2023 at 08:00 AM, Stephan Ahonen KE0WVA wrote:
Do not do this. The QMX's CPU-driven power supply does not respond quickly to changes in input voltage. The issue is documented here:
A firmware update has improved, but not totally fixed the issue. Myself and at least one other person have killed QMXes in this manner since that update.
Acknowledged - thanks. -- - 73 de Andy -
|
Re: QMX Board pinout vs schematic and PSU voltages
toggle quoted message
Show quoted text
JZ,
The problem I was trying to address was to allow the Micro to run its FW ASAP.
As far as the LIN_REG_EN voltage, I take it you are concerned about the very small amount of current through the 100K resistor and the voltage being too high ...hence the zener to hold it to 3.6V. Sounds like a good idea to me.
73 Kees K5BCQ?
|
Re: QMX Board pinout vs schematic and PSU voltages
JZ,
The problem I was trying to address was to allow the Micro to run its FW ASAP.
As far as the LIN_REG_EN voltage, I take it you are concerned about the very small amount of current through the 100K resistor and the voltage being too high ...hence the zener to hold it to 3.6V. Sounds like a good idea to me.
73 Kees K5BCQ?
|
#QMX #QDX #QDX-M output transformers (WTST and RWTST) documentation
#qmx
#qdx
#QDX-M
Hi all
Many thanks to Ross EX0AA for his transformer designs, the 3:3 ratio (9V operation) WTST (Weird Twisted Sisters Transformer) and 3:2 ratio (12V operation) RWTST (Really Weird Twisted Sisters Transformer).?
I have now uploaded documentation for both these designs and the original simple design, all in one document which is referenced from the QMX, QDX and QDX-M assembly manuals.?
The original purpose of the designs was to solve the parasitic resonance problem that sometimes reduced output power on 10m band on the high-bands QDX. However the improved symmetry and tighter coupling of these transformers does improve performance (put power, efficiency, suppression of even harmonics) on all versions of QMX, QDX and QDX-M. Therefore the twisted wire transformers are now the recommended build for all these transceiver kits.?
The transformer instructions are linked from each of the QMX, QDX and QDX-M pages. I removed the transformer instructions from the respective assembly manuals. So you will have to use the transformer document and choose the appropriate transformer (WTST for 9V, RWTST for 12V supply operation.?
|
Colin thus spake:
Hans, I used to send all my email from a server I owned. There was a period where it wasn¡¯t getting through. I was only sending private correspondence and no business emails at all. After months of digging I found that my web host shared one server with a lot of other websites. Of course this is common. It only took one of them to start spamming people for the filters to mark all emails from all of this websites on that server as spam. In my case physically moving to a different server in there block fixed it.
Following these rules helps a lot, and not just with gmail:?
--?
Colin - K6JTH?
Colin, BTDT. ?Except that it was the domain host for my US Congress campaign website that got blacklisted. ?Not my site -- the entire schmear run by Texas dot net . The next campaign cycle I moved to hosting on godaddy dot com, for which I am still paying to park all of my "strohm for congress" domains. ?Why? ?Because there are still some ratss wearing red neckties who are still mad at me. If google was any good at eliminating SPAM, I wouldn't get the same SPAMs over and over, landing in my SPAM folder. ?And only one is actually NOT SPAM, it's just something I put there because I was tired of their advertising but might need something from them someday 73 Jim N6OTQ.
|
Re: QMX pre-flight check - incipient Q103 / Q104 short in buck regulator
Good points, all!
Paul
On 9/12/23 07:41, Kees T wrote:
toggle quoted message
Show quoted text
You can also remove the solder bridge by using a dab of flux
applied with toothpick if you can get the soldering iron tip in
there. The flux will increase the surface tension of the solder
and break the bridge. The only "required solder" is between
the lead and the pad. Using the smallest Solder Wick
and a small solder iron tip also works.
73 Kees K5BCQ
|
Re: QMX Board pinout vs schematic and PSU voltages
Kees,? That would not solve the fundamental problem, which is LIN_REG_EN can pull the MCU pin too high. A better solution might be a 3.6V Zener from LIN_REG_EN to ground. The V(absmax) spec could never be violated then.
JZ
Relative to power sequencing: would there be any advantage to using the PWR_ON switch to route V_IN to the "+12V" connection on Q102 (only) for bringing 78M33 3.3V up first/fast to the Micro. The Micro would still control LIN_REG_EN for switching over to the SMPS 3.3V and would control PWR_HOLD for +12V and 5V SMPS supply through Q103 and Q105.
73 Kees K5BCQ
|
Hans, we can set up echoing internet emails with JS8Call mailboxes :-)? Would also be available?to communicate as a group when war breaks out.
73,
Joe W2JEJ
Hans, I see you are blacklisted by two of the lists. You can check you status here:
There were changes to the hoops that we
had to jump through to get emails to go a few months ago, I
started getting messages from gmail saying this.
Went to my mail server provider, IONOS
and got it set up.? Just changing a few server settings at their
end, all semi automated.? Perhaps this is the same.
Chris, G5CTH
On 12/09/2023 17:01, Hans Summers
wrote:
Hello Billy
I don't think that is related to .
Your messages on are coming through just
fine. The problem is emails sent from QRP Labs shop are
accused of being spam by some email providers (now including
Gmail).?
On Tue, Sep 12, 2023 at
6:58?PM N5SE < bwmoore@...>
wrote:
Hans,
I just found out why I can no longer use . I am in the same
situation that Colin was in.
Thanks for the suggestions Colin...?
Hopefully I can find a solution soon.?
Hans, I used to send all my email from a server I
owned. There was a period where it wasn¡¯t getting
through. I was only sending private correspondence
and no business emails at all. After months of
digging I found that my web host shared one server
with a lot of other websites. Of course this is
common. It only took one of them to start spamming
people for the filters to mark all emails from all
of this websites on that server as spam. In my
case physically moving to a different server in
there block fixed it.
Following these rules helps a lot, and not just
with gmail:?
--
Colin - K6JTH?
--
N5SE
Billy Wayne Moore
7066 Shady Knoll Ln
Willis, TX 77318-6324
Phone: 936-537-2975???
--
Colin - K6JTH?
|
Re: QMX Board pinout vs schematic and PSU voltages
Relative to power sequencing: would there be any advantage to using the PWR_ON switch to route V_IN to the "+12V" connection on Q102 (only) for bringing 78M33 3.3V up first/fast to the Micro. The Micro would still control LIN_REG_EN for switching over to the SMPS 3.3V and would control PWR_HOLD for +12V and 5V SMPS supply through Q103 and Q105.
73 Kees K5BCQ
|
Hans, I see you are blacklisted by two of the lists. You can check you status here:
There were changes to the hoops that we
had to jump through to get emails to go a few months ago, I
started getting messages from gmail saying this.
Went to my mail server provider, IONOS
and got it set up.? Just changing a few server settings at their
end, all semi automated.? Perhaps this is the same.
Chris, G5CTH
On 12/09/2023 17:01, Hans Summers
wrote:
Hello Billy
I don't think that is related to .
Your messages on are coming through just
fine. The problem is emails sent from QRP Labs shop are
accused of being spam by some email providers (now including
Gmail).?
On Tue, Sep 12, 2023 at
6:58?PM N5SE < bwmoore@...>
wrote:
Hans,
I just found out why I can no longer use . I am in the same
situation that Colin was in.
Thanks for the suggestions Colin...?
Hopefully I can find a solution soon.?
Hans, I used to send all my email from a server I
owned. There was a period where it wasn¡¯t getting
through. I was only sending private correspondence
and no business emails at all. After months of
digging I found that my web host shared one server
with a lot of other websites. Of course this is
common. It only took one of them to start spamming
people for the filters to mark all emails from all
of this websites on that server as spam. In my
case physically moving to a different server in
there block fixed it.
Following these rules helps a lot, and not just
with gmail:?
--
Colin - K6JTH?
--
N5SE
Billy Wayne Moore
7066 Shady Knoll Ln
Willis, TX 77318-6324
Phone: 936-537-2975???
--
Colin - K6JTH?
|
There were changes to the hoops that we
had to jump through to get emails to go a few months ago, I
started getting messages from gmail saying this.
Went to my mail server provider, IONOS
and got it set up.? Just changing a few server settings at their
end, all semi automated.? Perhaps this is the same.
Chris, G5CTH
On 12/09/2023 17:01, Hans Summers
wrote:
toggle quoted message
Show quoted text
Hello Billy
I don't think that is related to .
Your messages on are coming through just
fine. The problem is emails sent from QRP Labs shop are
accused of being spam by some email providers (now including
Gmail).?
On Tue, Sep 12, 2023 at
6:58?PM N5SE < bwmoore@...>
wrote:
Hans,
I just found out why I can no longer use . I am in the same
situation that Colin was in.
Thanks for the suggestions Colin...?
Hopefully I can find a solution soon.?
Hans, I used to send all my email from a server I
owned. There was a period where it wasn¡¯t getting
through. I was only sending private correspondence
and no business emails at all. After months of
digging I found that my web host shared one server
with a lot of other websites. Of course this is
common. It only took one of them to start spamming
people for the filters to mark all emails from all
of this websites on that server as spam. In my
case physically moving to a different server in
there block fixed it.
Following these rules helps a lot, and not just
with gmail:?
--
Colin - K6JTH?
--
N5SE
Billy Wayne Moore
7066 Shady Knoll Ln
Willis, TX 77318-6324
Phone: 936-537-2975???
|
Donald S Brant Jr
Paul - AI7JR
JE Jesson
Colin Kaminski