Re: Look what showed up from Germany!
I was so impressed I ordered 2 more....... the 3D printed case that I have is nice but these German metal cases are first rate. David J. Wilcox K8WPE¡¯s iPad
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On Apr 18, 2019, at 1:24 PM, ANDREW STEEN < n2gff@...> wrote: I just have to comment. These cases are very well made, and the accessories included make the QCX very enjoyable to use. Just got my second case yesterday for my (yet to be built) 40M QCX.
Andrew
K6STN ? ? Sorry to be a bit thick here but are you saying this is good or bad???? On 17/04/2019 18:50, dkwflight wrote: The case I ordered at the same time as the kit transever
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Re: U3S: Apparent WSPR frequency error
>From version 3.04 (of the old AD9850 DDS based U3), the U3S was changed to match the behaviour of the WSPR decoder (i.e. centre frequency). However, on migrating to the Si5351A this change got lost.
So I will try and put it also into the next U3S firmware version
Did this get done? No problem. I was just wondering. Using v3.12a and WSPR is showing ~2 Hz higher on my test RX. I do not think it shows on Firmware history. 73 Alan G4ZFQ
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Re: U3S transmitting through the case
Thank you for the great advice.
I will reconfigure to a one band build and report back.?
--
Best regards,
Chris
M0XFL
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5W CW transceiver kit Arrived yesterday
I can't wait, oh wait, I have to because this is a group build with my club the Mohave Amateur Radio Club in Kingman AZ and the guy who is running the group is in worse shape physically than I am. I don't want to get ahead of everyone else who has ordered one. I don't know code anyway so there's no hurry, I just like to build stuff. I've never wound my own toroids so in the interest of not screwing up I'm hoping for some great working together time.
Anyway, just wanted to let the group know and also I have received my case from BaMaTech and it looks just as good in person as it does in the pictures.
Chris in Kingman, AZ KK6LOP
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Re: U3S transmitting through the case
yes i would go back to one band build first and exclude the LPF kit. Makes it easier too diagnose issues.
also I would check the LPF plug-in board - basics - is input and output path a low value resistance (given that its just 3 small coils in series) - if you have an antenna analyser then run the filter across that
it does sound a bit weird - looking forward to the answer
Matt
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Re: qrp labs QRSS Transmitter
Thanks Alan, Yes, that is the kit im talking about. To be honest I've been so far away from radio for the last 5 years that im trying to catch up on a number of things. hi hi. some advice has started rolling in so thanks all. Gary, 2E0BFJ
On 18 April 2019 at 18:08 Al Holt <grovekid2@...> wrote:
Gary,
This sound like the original QRSS transmitters, not the U3, U3S or QCX. Sorry, but I haven't looked at the schematic and have been doing QRSS with a U3S for the past year or two.?
Forgive me if I've misunderstood your request. Is this the unit you have:? ?You may want to make sure your power supply is still good. There doesn't look like much to go wrong on this board :-)?
Otherwise it would be good to ID it as U2, U3 or U3S.
Thanks!!
--Al
WD4AH
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Re: U3S transmitting through the case
As my name sake says, when using a local receiver the leakage is
going to provide your strong signal regardless of whether the TX
Antenna or load is plugged in,
verified in your comment about touching the BNC Outer / metalwork
increasing local strength.
If you have being at this for a week, To save getting the runaround
you need to measure and follow that RF level from the PA stage,
through Switched LPF's and finally to the terminated Ant jack.
If you do not have a QRP Power Meter then build yourself an RF
Probe. An example of such a detector is an option in the QRP Lab's
Dummy load, two components. Take a look at that section of the build
instructions else Google will provide numerous examples
In your use its purely for indication, no need for accuracy. Any
rectifier type diode will do and something anywhere in the range of
a 103 / 104 capacitor from the junk box / laying on the bench.
Else, bullet points to think about.
None of the 6(?) bands get results?
On the LPF's check the continuity end to end to verify the enamel
has being removed from the wire, and properly tinned / soldered.
Check the jumper positions and Ant Out connections are correct on
the U3 / Relay PCB's
Multiband operation selecting the correct LPF in U3 setup menu
As a final last resort sanity check remove the multi band SWT PCB
and set the U3 up for mono band, for it's correct operation, then
troubleshoot the rest.
Not sure on anything = photo's......
Alan
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Why do I say this, good question...
a) I have a switch on the U3S output, switching this on and off
has no effect at all on the strong signal I hear on the receiver.
None at all.
b) Disconnecting the coax entierly cuts the signal clean off, no
signal on my receiver
c) Touching the outside of the BNC plug to the case, the strong
signal is back
Currently, I can remove the need to connect the centre of the coax
entirely from the system.
I'm using the V5 relay board, and am using the correct
instructions.
I have Quadruple checked all of it, the links, shorts components.?
I was wondering if there was a known problem?
I'm going to buzz out the tracks on the relay board next. Maybe
there is an issue.
--
Best regards,
Chris
M0XFL
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Re: Lazy Tuning add-on for my QCX Transceiver
Ronan--
Thank you for the cool tip on the case.? I was about to delve into butchering a 200mm by 300mm double-clad board and do all the fiddly soldering to get non-88* joints, when I remembered that I had a near empty example of you box in my fishing kit.? ?I will be doing way less mumbling this evening.? :)
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Jim, KJ7EZN? ? 73!
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Re: U3S transmitting through the case
Why do I say this, good question...
a) I have a switch on the U3S output, switching this on and off has no effect at all on the strong signal I hear on the receiver. None at all.
b) Disconnecting the coax entierly cuts the signal clean off, no signal on my receiver
c) Touching the outside of the BNC plug to the case, the strong signal is back
Currently, I can remove the need to connect the centre of the coax entirely from the system.
I'm using the V5 relay board, and am using the correct instructions.
I have Quadruple checked all of it, the links, shorts components.? I was wondering if there was a known problem?
I'm going to buzz out the tracks on the relay board next. Maybe there is an issue.
--
Best regards,
Chris
M0XFL
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Re: U3S transmitting through the case
And some exoplanetary photo's so we can picture how its wired is
worth a thousand words?
Another Alan....
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An odd one this, but I have been at this for weeks.
The U3S appears to be transmitting through the shield of the Coax,
not at all through the central conductor.??
I have buzzed everything out. No shorts. I have even removed and
double checked the Bifilar transformer. All Okay. I can receive
reports on my own radio, no need to connect the inner core of the
antenna coax, just the screen...
At first glance, this sounds simple, but it's really driving me
nuts.?
Has anybody else had this failure mode?
--
Best regards,
Chris
M0XFL
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Re: U3S transmitting through the case
The U3S appears to be transmitting through the shield of the Coax, not at all through the central conductor.
Chris, Why do you say that? No reading on a power meter? What voltages on the BS170? Local RX does not need an antenna, a strong signal will be heard just from leakage from the Si5351 even with a dead BS170. 73 Alan G4ZFQ
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U3S transmitting through the case
An odd one this, but I have been at this for weeks.
The U3S appears to be transmitting through the shield of the Coax, not at all through the central conductor.??
I have buzzed everything out. No shorts. I have even removed and double checked the Bifilar transformer. All Okay. I can receive reports on my own radio, no need to connect the inner core of the antenna coax, just the screen...
At first glance, this sounds simple, but it's really driving me nuts.?
Has anybody else had this failure mode?
--
Best regards,
Chris
M0XFL
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Re: Look what showed up from Germany!
I just have to comment. These cases are very well made, and the accessories included make the QCX very enjoyable to use. Just got my second case yesterday for my (yet to be built) 40M QCX.
Andrew
K6STN ?
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From: [email protected] [mailto:[email protected]] On Behalf Of geoff M0ORE via Groups.Io
Sent: Wednesday, April 17, 2019 3:12 PM
To: [email protected]
Subject: Re: [QRPLabs] Look what showed up from Germany!? Sorry to be a bit thick here but are you saying this is good or bad???? On 17/04/2019 18:50, dkwflight wrote: The case I ordered at the same time as the kit transever
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Re: qrp labs QRSS Transmitter
Oh, one more thing...try reseating the microcontroller in in socket.
--Al
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Re: qrp labs QRSS Transmitter
Gary,
This sound like the original QRSS transmitters, not the U3, U3S or QCX. Sorry, but I haven't looked at the schematic and have been doing QRSS with a U3S for the past year or two.?
Forgive me if I've misunderstood your request. Is this the unit you have:??You may want to make sure your power supply is still good. There doesn't look like much to go wrong on this board :-)?
Otherwise it would be good to ID it as U2, U3 or U3S.
Thanks!!
--Al
WD4AH
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Re: Lazy Tuning add-on for my QCX Transceiver
Hello Ronan :-)
Trust your 2019 has been as planned so far.
Wondering if you are yet able to provide further details and code (ATiny 85) of your QCX tuning aid?
Looking forward to hearing from you soon.
73
Nigel ZS6RN ex G8DEV
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Re: Multi band QCX plus Party time...
My personal, un-definitive view is Multi banding a QCX is
an interesting challenge.
(Making something do things it was never designed or lends it's
self to easily to do.)
There is no single recipe for everyone, compromises will probably
have to be made and what's acceptable for one person regards time
/ money invested, may not be for another builder / user.
If you want a reproducible, least compromise design then it maybe
it's the QSX you are waiting for,
QCX40 is $50
QSX40 is expected to be $75 and a far fuller spec from the get go
A 10 Band and cased QSX expected $150
if your soldering Iron is itching to make smoke then have a
play.....
(Even multi banding the Soda Pop design was not without
compromise, and at least one documented branch of the design took
to a a plug in PCB Per Band approach to meet their goals,
similar to Andreas multiband QCX approach??)
YMMV
Alan
On 18/04/2019 14:57, Nigel wrote:
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Can anyone (or Hans but would rather not distract from his QSX
efforts <smile>) provide definitive feedback regarding
points mentioned by Simon VK3ELH?
Advance thanks for any replies.
73
Nigel ZS6RN ex G8DEV?
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Re: Multi band QCX plus Party time...
Can anyone (or Hans but would rather not distract from his QSX efforts <smile>) provide definitive feedback regarding points mentioned by Simon VK3ELH?
Advance thanks for any replies.
73
Nigel ZS6RN ex G8DEV?
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Re: qrp labs QRSS Transmitter
This could be one of many things. I recommend that you first go through the trouble shooting procedure shown here
And follow the procedure related to the transmitter portion of the rig. Before replacing any parts it¡¯s a good idea to do these tests to narrow down the area of concern.?
Good luck ...... Ron
On Wed, Apr 17, 2019 at 21:08 g.swain via Groups.Io <g.swain= [email protected]> wrote: Can anyone advise? I built this little kit a few years back & it worked well. Then suddenly started sending a dead signal. I dont know why & never got around to it at the time due to kidney failure. I've now had a transplant & am now facing this little problem.
TIA Gary, 2E0BFJ
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qrp labs QRSS Transmitter
Can anyone advise? I built this little kit a few years back & it worked well. Then suddenly started sending a dead signal. I dont know why & never got around to it at the time due to kidney failure. I've now had a transplant & am now facing this little problem.
TIA Gary, 2E0BFJ
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David Wilcox K8WPE
Matt 9V1MH/VK2AMH/YF2AAH
Alan de G1FXB
Ronald Taylor