Martin,
Looks very nice.? What case did you use for the QCX?
Jonathan KC3KBE (just ordered the 40m kit today)
On Mon, Dec 11, 2017 at 2:56 PM, Martin Waller <martin@...> wrote: Hi,
This is a tight fit but it does go in.
Martin
G0PJO
|
Yes I printed 1. ? Found a couple of snags but easy to fix with file. ? If I recall the cutout for the power connector needed some adjustment and the cutout for the LCD needed enlarging. ? But overall a nice enclosure. ? I printed it for a buddy as my QCX is in the to build pile Dave VE7HR.? Sent from my iPhone
toggle quoted message
Show quoted text
On Dec 11, 2017, at 7:01 PM, somersdave@... wrote: Has anyone tried the short version yet? I prefer to have power source outside the transceiver box.
If not, I will be attempting the short version when my printer arrives. Probably a Christmas break job....
Dave
KI7DPP
|
QCX CW TRANSCEIVER problem.
QCX CW TRANSCEIVER. When I turn on the transceiver I do not receive anything, but I only listen to a sound like a self-oscillation. I attach the audio file. Some idea ? Thank you.
|
Has anyone tried the short version yet? I prefer to have power source outside the transceiver box.
If not, I will be attempting the short version when my printer arrives. Probably a Christmas break job....
Dave
KI7DPP
|
Re: ZL1RS balloon flight - BB01
Yes, Jan ... it was the same tracking VK3YT Picospace balloons
across the Pacific over the last 2-3 years.? Several stations
receiving out to 2000km, then a few to 3000km, then just me for
another 5000km or so.? After two F2 hops (8-10,000km) it gets
difficult to receive a 10-20mW signal unless the balloon is near our
antipode.? Check the WSPRnet.org results for VE3KCL (U3B-12) and
K4JCW (HIRFW-6) over the past 2 weeks and see that the same applies
in the Northern hemisphere with just a few stations receiving past
3000km.
We have a very quiet countryside location on a hill top with
negative horizon to the east, and the RX is on a 4 WL long Beverage
RX antenna pointed at the location of BB01.? The difference between
a Beverage antenna and any other wire antenna I tried was like night
and day. The closest performing RX antenna was the Flag antenna ...
it was only about 4dB worse.
73, Bob ZL1RS
On 12/12/2017 11:25 AM, SM7ETW Jan
wrote:
toggle quoted message
Show quoted text
Bob
I note that you are the only one receiving BB01.
I know that you have extremly sensitive ears.
But is this what you would expect ?
72 Jan
|
Re: DVM/RF detector header Question
HI Barry,
That is very low indeed. Please double check the solder joins in the LPF, especially on the toroids, make sure the enamel coating is removed.
Also check for continuity between the PA mosfet output to the antenna connector...
My 40m on 13.6v gives me 5.2w.
73 Nick, VK4PLN
|
Re: ZL1RS balloon flight - BB01
Bob
I note that you are the only one receiving BB01.
I know that you have extremly sensitive ears.
But is this what you would expect ?
72 Jan
|
|
|
Hi,
This is a tight fit but it does go in.
Martin
G0PJO
|
Re: Receiver module for U3S - multiple bands
Hi Ken.
Ok thanks, understood.
Now to go and get the receiver board etc...If shipping times have improved, that might be my Xmas project
73
Roger
---
**
Roger Hill
**
toggle quoted message
Show quoted text
On 2017-12-11 19:26, KENS 2ND ACC via Groups.Io wrote: Sorry, did not answer your specific questions...
''Now comes the bit I am unsure of, and that is the Park setting. The
receiver notes say use park mode 4 - but that is only one frequency.
But the U3S says the setting in the RX screen determines the clock
frequency...does that mean I can leave park mode at 2 as it is now,
and set the frame to 20 minutes, and hence receive on three
frequencies, and still park at 150Mhz as I do now? My firmware is
3.12a."
Answer is yes to all, you could do this, but you effectively will be
receiving on 150/4 = 37.5mhz during the CAL period.
73 Ken G4APB
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Roger Hill
Sent: 11 December 2017 18:38
To: [email protected]
Subject: Re: [QRPLabs] Receiver module for U3S - multiple bands
Thanks Ken.
Since the 'LPF always in series' is the highest frequency, I figured
it would not matter if I had it in series with the BPF's..they would
all be for bands lower than or equal to the LPF.
Roger
G3YTN
---
**
Roger Hill
**
On 2017-12-11 18:18, KENS 2ND ACC via Groups.Io wrote:
Hi Roger,
It certainly is addictive, especially if you try to build ‘outside the
box’ ideas. I have built a multi band hopping rx and a multi band
tx/single band rx transceiver, but your ideas sound interesting.
‘Rx’ mode automatically gives 4xLO freq as displayed as needed by the
U3 rx, but if you want to receive during the CAL mode you need to set
the PARK freq to 4x the LO freq yourself (ie 7mhz in rx mode needs
28mhz in Park mode.) I generally use Park 4 setting.
Remember that the latest relay switched lpf board needs to be
specially linked so one lpf is not always in series with all the other
filters.
Also I am not sure how you will separate the rx bpf inputs from the tx
lpfs. I had to use a c/o relay. Hans suggestion of just wiring the two
together produced high tx harmonics for me.
Your timing logic seems sound but I wanted cal and display of result
in a 2 min cycle so I use 01 115.
73 Ken G4apb
Sent from my iPad
|
Re: QCX Off Board Mounting wire
Hi Wes,
I used 0.14mm2 which is roughly equal to AWG26. For the supply you might want to use slightly thicker wire, AWG24 will do as it is rated to 2.1 A @ 75degC (typical current draw is 500-600mA while transmitting).
--
Regards/73,
Enno, PF5X
|
Re: Receiver module for U3S - multiple bands
Sorry, did not answer your specific questions...
''Now comes the bit I am unsure of, and that is the Park setting. The receiver notes say use park mode 4 - but that is only one frequency. But the U3S says the setting in the RX screen determines the clock frequency...does that mean I can leave park mode at 2 as it is now, and set the frame to 20 minutes, and hence receive on three frequencies, and still park at 150Mhz as I do now? My firmware is 3.12a."
Answer is yes to all, you could do this, but you effectively will be receiving on 150/4 = 37.5mhz during the CAL period.
73 Ken G4APB
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Roger Hill Sent: 11 December 2017 18:38 To: [email protected]Subject: Re: [QRPLabs] Receiver module for U3S - multiple bands Thanks Ken. Since the 'LPF always in series' is the highest frequency, I figured it would not matter if I had it in series with the BPF's..they would all be for bands lower than or equal to the LPF. Roger G3YTN --- ** Roger Hill ** On 2017-12-11 18:18, KENS 2ND ACC via Groups.Io wrote: Hi Roger,
It certainly is addictive, especially if you try to build ‘outside the
box’ ideas. I have built a multi band hopping rx and a multi band
tx/single band rx transceiver, but your ideas sound interesting.
‘Rx’ mode automatically gives 4xLO freq as displayed as needed by the
U3 rx, but if you want to receive during the CAL mode you need to set
the PARK freq to 4x the LO freq yourself (ie 7mhz in rx mode needs
28mhz in Park mode.) I generally use Park 4 setting.
Remember that the latest relay switched lpf board needs to be
specially linked so one lpf is not always in series with all the other
filters.
Also I am not sure how you will separate the rx bpf inputs from the tx
lpfs. I had to use a c/o relay. Hans suggestion of just wiring the two
together produced high tx harmonics for me.
Your timing logic seems sound but I wanted cal and display of result
in a 2 min cycle so I use 01 115.
73 Ken G4apb
Sent from my iPad
|
Re: Receiver module for U3S - multiple bands
Hi Roger,
Yes , I could see that working. A bit of extra loss in Rx mode though.
73 Ken G4APB
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Roger Hill Sent: 11 December 2017 18:38 To: [email protected]Subject: Re: [QRPLabs] Receiver module for U3S - multiple bands Thanks Ken. Since the 'LPF always in series' is the highest frequency, I figured it would not matter if I had it in series with the BPF's..they would all be for bands lower than or equal to the LPF. Roger G3YTN --- ** Roger Hill ** On 2017-12-11 18:18, KENS 2ND ACC via Groups.Io wrote: Hi Roger,
It certainly is addictive, especially if you try to build ‘outside the
box’ ideas. I have built a multi band hopping rx and a multi band
tx/single band rx transceiver, but your ideas sound interesting.
‘Rx’ mode automatically gives 4xLO freq as displayed as needed by the
U3 rx, but if you want to receive during the CAL mode you need to set
the PARK freq to 4x the LO freq yourself (ie 7mhz in rx mode needs
28mhz in Park mode.) I generally use Park 4 setting.
Remember that the latest relay switched lpf board needs to be
specially linked so one lpf is not always in series with all the other
filters.
Also I am not sure how you will separate the rx bpf inputs from the tx
lpfs. I had to use a c/o relay. Hans suggestion of just wiring the two
together produced high tx harmonics for me.
Your timing logic seems sound but I wanted cal and display of result
in a 2 min cycle so I use 01 115.
73 Ken G4apb
Sent from my iPad
|
Re: Receiver module for U3S - multiple bands
Thanks Ken.
Since the 'LPF always in series' is the highest frequency, I figured it would not matter if I had it in series with the BPF's..they would all be for bands lower than or equal to the LPF.
Roger
G3YTN
---
**
Roger Hill
**
toggle quoted message
Show quoted text
On 2017-12-11 18:18, KENS 2ND ACC via Groups.Io wrote: Hi Roger,
It certainly is addictive, especially if you try to build ‘outside the
box’ ideas. I have built a multi band hopping rx and a multi band
tx/single band rx transceiver, but your ideas sound interesting.
‘Rx’ mode automatically gives 4xLO freq as displayed as needed by the
U3 rx, but if you want to receive during the CAL mode you need to set
the PARK freq to 4x the LO freq yourself (ie 7mhz in rx mode needs
28mhz in Park mode.) I generally use Park 4 setting.
Remember that the latest relay switched lpf board needs to be
specially linked so one lpf is not always in series with all the other
filters.
Also I am not sure how you will separate the rx bpf inputs from the tx
lpfs. I had to use a c/o relay. Hans suggestion of just wiring the two
together produced high tx harmonics for me.
Your timing logic seems sound but I wanted cal and display of result
in a 2 min cycle so I use 01 115.
73 Ken G4apb
Sent from my iPad
|
Re: Receiver module for U3S - multiple bands
Hi Roger,
It certainly is addictive, especially if you try to build ‘outside the box’ ideas. I have built a multi band hopping rx and a multi band tx/single band rx transceiver, but your ideas sound interesting.
‘Rx’ mode automatically gives 4xLO freq as displayed as needed by the U3 rx, but if you want to receive during the CAL mode you need to set the PARK freq to 4x the LO freq yourself (ie 7mhz in rx mode needs 28mhz in Park mode.) I generally use Park 4 setting.
Remember that the latest relay switched lpf board needs to be specially linked so one lpf is not always in series with all the other filters.
Also I am not sure how you will separate the rx bpf inputs from the tx lpfs. I had to use a c/o relay. Hans suggestion of just wiring the two together produced high tx harmonics for me.
Your timing logic seems sound but I wanted cal and display of result in a 2 min cycle so I use 01 115.
73 Ken G4apb
Sent from my iPad
|
QCX Off Board Mounting wire
What gauge wire should I use for off-board mounting all the controls? I’d like to buy three conductor, braided wire?
thanks in advance.?
--
72/73
Wes
WM7WM
|
Having fun with T1 on 40M QCX
After
winding T1 for my 40M QCX, I decided to have a little fun before mounting it,
and perhaps get it right before mouinting it.? I installed some header pins
at unused location C8 (in the 40 meter case) and, referring to photo 7 on page
53 of the manual,? I connected secondary 3 to the header pins via plug-on
wires.? Then I connected my return loss bridge to the primary winding and
injected a frequency scan with my dds-based poor ham’s scalar network analyzer
into the return loss bridge with the 5-turn primary going to the unit under test
port.? This gives a highly sensitive indication of the resonance
frequency.? Note that I did not cut apart any of the windings on T1 at this
point. To make a long story short, the specifed winding count was within the
range of the tuning cap, but I removed one turn from secondary 3 to get the
desired resonance point at close to the midway adjustment of the tuning
cap.? Photos attached.
|
Receiver module for U3S - multiple bands
Hi all:
WSPR is addictive!
This is my first post to this group, so please be gentle.
I have a U3S, running on 3 bands at present, 20, 30, and 40. I am using the relay board to hold two of the LPF's, and one on the U3S itself.
That leaves 3 more LPF slots available on the relay board. So my idea is to use them for 3 more BAND pass filters, and set up the modes in the U3S to TX for the first three, the RX for the ones with the band pass filters in.
To do that, I think I need the following setup, and would appreciate comments.
1. Acquire the receiver module and band pass filters. Put the filters into the relay board, and configure the U3S as RX for those bands.
2.Connect the key line on the U3S to the TX line on the receiver module, and the clk1 line to LO.
3. Then??because I will need to feed the incoming RF AFTER it has passed through the Band Pass filter, I will need to pickup the incoming RF at say the output side of C5 (i.e the PA side of the BPF). That will then go to the RF input socket of the receiver module.
So the RF flow will look something like this for the three RX bands:
Antenna socket --> Relay board RF connector --> BPF--> pick up incoming RF here(perhaps the output side of c5.)--> to U3S PA?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? V? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Receiver RF in
4. The connections for the BPF on th ereciver board will simply be direct connections..no BPF on the receiver board.
5. Adjust the frame parameter on the U3S to say?20 minutes, so there is enough time for the?6 2-minute cycles (3*TX, 3*RX), plus 4 minutes cal.
Now comes the bit I am unsure of, and that is the Park setting. The receiver notes say use park mode 4 - but that is only one frequency. But the U3S says the setting in the RX screen determines the clock frequency...does that mean I can leave park mode at 2 as it is now, and set the frame to 20 minutes, and hence receive on?three frequencies, and still park at 150Mhz as I do now?? My firmware is 3.12a.
Many thanks
Roger
G3YTN
|
Re: 17 meter QCX output issue.
Steve, the transistor arrived last week, and I had some other things that sucked away my time. I just did replace the transistor a few minutes ago and It's now a solid 3 watts to an antenna. Of course the band is stone dead except for some FT8 activity up the band.?
Thanks so much for the 751. I owe you one.?
|
Re: DVM/RF detector header Question
30 Metre QCX on a 12V battery.? Firmware 1.00d
Looks like I'm only getting .21 watts out.? WSPR works well at that power but no CW contacts yet.? I'll have to do some more research to try to figure why output is so low.
Barry
|
Dave Somers KI7DPP
Nick VK4PP
Kurt Zimmerman
Enno Korma, PF5X
Wesley Matthews