Re: QCX#2019 lost RF power out?
Hello Bernd,
Yes, I am checking those coils points to see if it might be that problem.? I may have to pull the coils and remount them.?
?? I was hoping it might be something else that I was missing, and could check.? Thanks for your help.
73, Kent KC9LIF
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hello kent, I would first alll tension according to manual page 123 ... check.
Then definitely all loot places on touch, and paint spots especially on the coils.
I had such a mistake s.einer coil after the device already worked a year without errors.
greeting bernd df4jy
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I put the WSPR on a dummy load and disconnected the receiver antenna which gave a useable signal.
Using the WSPR Waterfall I have ¡°birdy ¡° type signals across the band during WSPR transmission.
Bob, However you check you are likely to see multiple "signals". The important thing is the levels of these compared with the fundamental as shown by the WSPR decoder. This is providing you are certain there is no overload, signals can be strong even from a dummy load. It is not unusual to see multiple decodes from stations some distance away, these might be 30 or more dB below the fundamental. 73 Alan G4ZFQ Using CW mode with the QXL set to 14.097.100 I find the following on the receiver and waterfall:
signal at 14.096.4 in USB mode
signal at 14.097.1 in CW mode
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Re: key short the first dash
Hi Viktor! I think it is a problem with key contacts.? If you pass through the contacts of the 5-10 mA DC? at the moment of contact, it destroys the thin oxide film and makes the contact more reliable. The necessary changes in the diagram are shown in the Appendix.
73! Anatoly UT5ULX
Hi,
I observe the similar issue from time to time (when using external cw paddle).
Cheers,
Victor
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Re: QCX#2019 lost RF power out?
hello kent, I would first alll tension according to manual page 123 ... check. Then definitely all loot places on touch, and paint spots especially on the coils. I had such a mistake s.einer coil after the device already worked a year without errors.
greeting bernd df4jy
|
Re: length of toroid wire
Dave
The on-line calculator at allow you to enter the number of turns for your core size
and will return the length of wire required.? There are other on-line calculators that do the same
thing.? is just the one that I routinely use.
Arv? K7HKL
_._
On Wed, Jan 17, 2018 at 11:07 AM, dave dabay <kd3pc@...> wrote: I am up to the winding L4 section of the manual and do not see a cut length for the wire for 20 meter operation?
I did scan the manual for this and did not see any reference.
Ideas, or ...
thanks
dave
|
Thank you both. I cannot decode but I do not believe that is the whole problem.?
I have done Crystal/GPS alignment per the manual. I put the WSPR on a dummy load and disconnected the receiver antenna which gave a useable signal.?
Using the WSPR Waterfall I have ¡°birdy ¡° type signals across the band during WSPR transmission.?
Using CW mode with the QXL set to 14.097.100 I find the following on the receiver and waterfall:
signal at 14.096.4 in USB mode
signal at 14.097.1 in CW mode
On Wednesday, January 17, 2018, 11:33 AM, Bob Sutton via Groups.Io <zl1rs@...> wrote:
WSPR encoding in the early
QCX firmware versions has a bug (half the WSPR
transmission is incorrect).? It was
fixed in version T1.00e.? The QCX firmware history refers:
1.00e
| 07.Dec-2017 | - Bug fix: stored message sending now sends
at current keyer speed (not stored default)
- Bug fix: WSPR tones in the second half of the transmission
were potentially corrupted |
On 18/01/2018 5:53 AM, Roger Hill
wrote:
Hi Bob.
Do you have a receive setup for WSPR? If so, see if you can
decode your own signal. You will need to use a dummy load on
your receiver antenna, and perhaps turn on any RF attenuators
that your receiver supports, so that you don't overload it.
Roger
G3YTN
On 2018-01-17 16:49, Bob Cutter via Groups.Io wrote:
My
#308(no software upgrade)on 20 is operating well with several
contacts, including 5 SOTA.?
?
However I have failed on WSPR. Same antenna and varied
times so propagation should not be the culprit.?
?
External receiver and power meter show transmissions and
GPS has good data. I have performed the GPS calibration of the
transceiver.
?
I have varied the transmit frequency between 14.097.020 and
180.
?
Any suggestions?
?
72, Bob KI0G?
|
Re: length of toroid wire
Try toroids.info on the web.
Roger
G3YTN
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On 2018-01-17 18:07, dave dabay wrote:
I am up to the winding L4 section of the manual and do not see a cut length for the wire for 20 meter operation?
I did scan the manual for this and did not see any reference.
Ideas, or ...
thanks
dave
|
Re: Magnet Wire " of colour "
i had bought few wireslike these from ebay.
?But i find they are little tensile unlike pure copper. ?they are used for decorative lecing etc ?? But one smart guy advised making color enamel wires is DAM EASY. Just use marker pens and pass the wire thro its tip slowly. ?once the winding and terminating is over we dont care for the colors. All the best ?sarma ?vu3zmv
On Wed, Jan 17, 2018 at 10:56 PM, geoffrey pike via Groups.Io <gi0gdp@...> wrote: a better link:-
On Wednesday, 17 January 2018, 17:05, Mike W <mike@...> wrote:
Well, I've just rewound the trifilar toroid for one of my QRPLabs receivers
and I don't see any difference in RX performance between? the wire supplied in
the kit and the multi coloured trifilar wind of the 'craft' wire. So, AFIC the
multi coloured winding wins easily. no doubt that its wired correctly and if
the build fails to work you know to look elsewhere
On 17 Jan 2018 at 11:57, Mike W wrote:
> I have just received some wire from the "Scientific Wire Company"
> 28AWG (0.32mm) in many different colours - ideal for winding those pesky
> Toroidal things.
> Have a look at and? their? product code SPC-0320
> They claim a total of 55 metres - enough? to wind 'many QCX' and only ?3.58
> plus taxes and postage
>
> In my pack are two reels of light green and red, and one reel of dark
> green,
> purple, brown, blue, orange, silver, old gold and light gold
>
> no connection etc ad nauseam
>
> hth, Mike
>
>
>
|
I am up to the winding L4 section of the manual and do not see a cut length for the wire for 20 meter operation?
I did scan the manual for this and did not see any reference.
Ideas, or ...
thanks
dave
|
QCX#2019 lost RF power out?
Hi All,
For some reason, my 40M QCX has no RF power out.? It had the full expected out for the 12v that I was running after I went thru alignment (3.5W).? It also has very good Rx.? However, when I tried to use it a few weeks later, it did not put out any power.? It measures 0.01W on the internal RF Power meter (9.2) at L1 and 0.03 when measuring drains of the BS170s.? Any idea what might have caused this loss of output?? BTW, at 12.3V the Rx current is 117mA, while the Tx current is 187mA.
Thanks, Kent
|
WSPR encoding in the early
QCX firmware versions has a bug (half the WSPR
transmission is incorrect).? It was
fixed in version T1.00e.? The QCX firmware history refers:
1.00e
|
07.Dec-2017 |
- Bug fix: stored message sending now sends
at current keyer speed (not stored default)
- Bug fix: WSPR tones in the second half of the transmission
were potentially corrupted |
On 18/01/2018 5:53 AM, Roger Hill
wrote:
toggle quoted message
Show quoted text
Hi Bob.
Do you have a receive setup for WSPR? If so, see if you can
decode your own signal. You will need to use a dummy load on
your receiver antenna, and perhaps turn on any RF attenuators
that your receiver supports, so that you don't overload it.
Roger
G3YTN
On 2018-01-17 16:49, Bob Cutter via Groups.Io wrote:
My
#308(no software upgrade)on 20 is operating well with several
contacts, including 5 SOTA.?
?
However I have failed on WSPR. Same antenna and varied
times so propagation should not be the culprit.?
?
External receiver and power meter show transmissions and
GPS has good data. I have performed the GPS calibration of the
transceiver.
?
I have varied the transmit frequency between 14.097.020 and
180.
?
Any suggestions?
?
72, Bob KI0G?
|
Re: Antenna Analyzer using the QRP-LABS Arduino shield
I conducted some experiments with using a lowpass filter between the BS170 and the bridge circuit.??? I had been using a jumper wire in place of a lowpass filter up until now.? When testing with a pure resistor as a load, the jumper works fine as the fundamental frequency and all the harmonics will have the same SWR and the readings are not effected.?? When testing a real antenna ( or feeding an antenna tuner ), the harmonics cause the SWR to read high.?
The results of my experiment are:
?*??? The experiment consisted of feeding a T type antenna tuner.? The antenna was a 120 ohm resistor
?*??? as the rf load.? The tuner was adjusted for best SWR on a number of bands and using a number of low
?*??? pass filters.
?*?????
?*????? Band??? No Filter??? 30 lowpass??? 20 lowpass??? 10 lowpass
?*?????????????? Jumper
?*????? 80?? ?? ?? 2.0??? ?? ????? 1.3?????? ? ? ? ?? 1.3????? ? ? ? ???? 1.7
?*????? 40??? ? ? 1.8????? ? ? ??? 1.0?????? ? ? ? ?? 1.0???? ? ? ? ????? 1.7
?*????? 30???? ?? 1.4??????? ? ? ? 1.0??????? ? ? ? ? 1.0?????? ? ? ? ??? 1.0
?*????? 20????? ? 1.0????????????? xxx??????? ? ? ?? ? 1.0?????? ? ?? ??? 1.0
?*????? 15??????? 1.0????????? ? ? xxx???????? ? ? ? ? xxx??????? ? ? ? ?? 1.0
?*??? To me, the 20 meter lowpass looks like a good compromise for low band work.
( I am not sure how that table will look with the proportional font.? The program listing has the same table. )
The program in the files area has been updated.
Ron? K1URC
|
Re: Magnet Wire " of colour "
a better link:-
On Wednesday, 17 January 2018, 17:05, Mike W <mike@...> wrote:
Well, I've just rewound the trifilar toroid for one of my QRPLabs receivers
and I don't see any difference in RX performance between? the wire supplied in
the kit and the multi coloured trifilar wind of the 'craft' wire. So, AFIC the
multi coloured winding wins easily. no doubt that its wired correctly and if
the build fails to work you know to look elsewhere
On 17 Jan 2018 at 11:57, Mike W wrote: > I have just received some wire from the "Scientific Wire Company" > 28AWG (0.32mm) in many different colours - ideal for winding those pesky > Toroidal things. > Have a look at and? their? product code SPC-0320 > They claim a total of 55 metres - enough? to wind 'many QCX' and only ?3.58 > plus taxes and postage > > In my pack are two reels of light green and red, and one reel of dark > green, > purple, brown, blue, orange, silver, old gold and light gold > > no connection etc ad nauseam > > hth, Mike > > >
|
Re: Magnet Wire " of colour "
Well, I've just rewound the trifilar toroid for one of my QRPLabs receivers
and I don't see any difference in RX performance between the wire supplied in
the kit and the multi coloured trifilar wind of the 'craft' wire. So, AFIC the
multi coloured winding wins easily. no doubt that its wired correctly and if
the build fails to work you know to look elsewhere
toggle quoted message
Show quoted text
On 17 Jan 2018 at 11:57, Mike W wrote: I have just received some wire from the "Scientific Wire Company"
28AWG (0.32mm) in many different colours - ideal for winding those pesky
Toroidal things.
Have a look at and their product code SPC-0320
They claim a total of 55 metres - enough to wind 'many QCX' and only ?3.58
plus taxes and postage
In my pack are two reels of light green and red, and one reel of dark
green,
purple, brown, blue, orange, silver, old gold and light gold
no connection etc ad nauseam
hth, Mike
|
Re: Taking another stab at getting my 80m QCX up and running
The Boonton 91H has the lowest scale of .001 volts (1 millivolt) full scale. You can probably see about a 20-30uV signal with it on the lowest range.?
August KG7BZ
On Wed, Jan 17, 2018 at 9:00 AM, Michael Lloyd <mikell@...> wrote: The Boonton 91H is a lab grade RF volt meter. The lowest range is .001V / -70db or about 0.1?V (1/10 of a microvolt).
--
73
NE5U
Mike
|
Re: Taking another stab at getting my 80m QCX up and running
The Boonton 91H is a lab grade RF volt meter. The lowest range is .001V / -70db or about 0.1?V (1/10 of a microvolt).
--
73
NE5U
Mike
|
Hi Bob.
Do you have a receive setup for WSPR? If so, see if you can decode your own signal. You will need to use a dummy load on your receiver antenna, and perhaps turn on any RF attenuators that your receiver supports, so that you don't overload it.
Roger
G3YTN
toggle quoted message
Show quoted text
On 2018-01-17 16:49, Bob Cutter via Groups.Io wrote:
My #308(no software upgrade)on 20 is operating well with several contacts, including 5 SOTA.?
?
However I have failed on WSPR. Same antenna and varied times so propagation should not be the culprit.?
?
External receiver and power meter show transmissions and GPS has good data. I have performed the GPS calibration of the transceiver.
?
I have varied the transmit frequency between 14.097.020 and 180.
?
Any suggestions?
?
72, Bob KI0G?
|
My #308(no software upgrade)on 20 is operating well with several contacts, including 5 SOTA.?
However I have failed on WSPR. Same antenna and varied times so propagation should not be the culprit.?
External receiver and power meter show transmissions and GPS has good data. I have performed the GPS calibration of the transceiver.
I have varied the transmit frequency between 14.097.020 and 180.
Any suggestions?
72, Bob KI0G?
|
Re: Sorry Re: [QRPLabs] Magnet Wire " of colour "
I've used different colours of craft wire from Hobbycraft and The Range in the UK. Not such a big range of colours and only two diameters, but it's soft copper and the enamel appears to be polyurethane and can be soldered-through. Watch out for the fumes. I think the brand name is Trimits.
73,
John G4EDX Nottingham, England
On 17 January 2018 at 15:19, Chris Wilson <chris@...> wrote: Hello Paul / Alan / Mike,
Well? I? bought? some? earlier,? was? concerned it was just a coloured
coating? but looking at it in quantity it says enamelled, and soft, so
here's hoping... ! Will report back when it lands.
Thanks for the heads up Mike.
Paul, great results on MF, very impressive!!
?Wednesday, January 17, 2018
> Alan,
> I hadn't even thought about those things! I was wondering about
> thickness and durability of enamel. 'Enamel' is a rather generic
> term with regard to coatings on wires, and as we know not all are
> created equal.
> 73,
> Paul
> (currently working on mounting my prized U3S onto a rack panel along
> with some other bits of gear :-)
--
?2E0ILY
Best regards,
?Chris? ? ? ? ? ? ? ? ? ? ? ? ? ? mailto:chris@...
--
Best regards, Chris Wilson (2E0ILY)
|
Re: Sorry Re: [QRPLabs] Magnet Wire " of colour "
Hello Paul / Alan / Mike,
Well I bought some earlier, was concerned it was just a coloured
coating but looking at it in quantity it says enamelled, and soft, so
here's hoping... ! Will report back when it lands.
Thanks for the heads up Mike.
Paul, great results on MF, very impressive!!
Wednesday, January 17, 2018
toggle quoted message
Show quoted text
Alan, I hadn't even thought about those things! I was wondering about
thickness and durability of enamel. 'Enamel' is a rather generic
term with regard to coatings on wires, and as we know not all are
created equal. 73,
Paul
(currently working on mounting my prized U3S onto a rack panel along
with some other bits of gear :-) -- 2E0ILY Best regards, Chris mailto:chris@...
--
Best regards, Chris Wilson (2E0ILY)
|
Retired Doc
Bernd
Mike