To followup, I found the issue with the progrock blinking three times rather than four: a sagging 9V battery I was using for testing. I plugged it into 13.5V from my Astron and it operates as it should.
Thanks to Alan and Mike for their input.
Best, Chris, VO1CKD
?
On Thursday, December 7, 2017, 2:20:23 PM NST, Chris Dunnett via Groups.Io <chris_dunnett@...> wrote:
Alan,
I though of taking a video and slowing it down but...that just takes time away from building more radios. :)
I'll check the synth on my home receiver tonight. So long as it works :)
Best, Chris.
On Thursday, December 7, 2017, 1:53:41 PM NST, Alan G4ZFQ <alan4alan@...> wrote:
> On power up, does the LED come on first then flash four times?
> Perhaps I'm just missing a flash.
>
Chris,
I've never really bothered, I had a counter on it and that confirmed it
worked.
But I've just tried counting, blowed if I see more than 3 but they are
just short flashes.
73 Alan G4ZFQ
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Re: QCX 20m LPF investigation
Hi Bob,
For my qcx20meter I measure with a precision lcr meter every toroids.
The L4 for 20 meters on red amidon 10 turn is over the 0.40microH. I found 9 turns is pefect.
After initial calibration I measured rhe output power on 14.020 with a scope and a diamon sx600: for 13.8V there is 3 Watt on 50Ohm.
The lowpass filter on yellow toroid turns are right on my lcr meter.
Hope help you.
Best Regards
Fabrizio
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Re: DVM/RF detector header Question
Wow. ?Many thanks. ?I actually have one of QRP Labs dummy loads with that convenient test point for RF.
Thanks Nick. I’ll have a look when I’m in the shack. -26c in Sudbury ON this am.
brr
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Dear Group - added new version of the case to??
This version is to G8MXV's specification and includes more room for the lipo, an on/off switch, battery supports to stop the lipo wandering and no microswitch or DC apertures.?
This version has been printed and assembled.? Everything fits!??
Details in zip file on Thingiverse plus photo in main file section.
73,
Dave, G8XUL
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Sorry I had the emails displayed wrongly, did not realise this was answered by many and solved, great and sorry for the QRM.
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I imagine you have tested this with another rig, as I had a similar sound on my 30m QCX when I had a bad connection between feedpoint and doublet dipole. So I imagine you must have eliminated it being something other than the QCX itself. Hopefully someone else listening to the recording may have an idea what could be causing that.
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Re: QCX Troubleshooting - Please can you help?
Can you check and let me know what voltage you are getting at Pins 9 and 10 please? I get no DC voltage at all, and no 20mhz signal either. Julian I've avoided jumping in because I cannot really help. But it seems to me if the display is showing something the 20MHz must be working. I've no idea about voltages but a scope put on the crystal pins will most likely stop oscillation. The way to confirm is with a RX not connected to the device. 73 Alan G4ZFQ
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Re: QCX modification for 40 Meters
The idea is to use two SPDT toggle switches instead of the rotary encoder and emulating the behaviour, the signals is described here: or here
You will get the feel for the pattern you need to make with the switches after some practice (: Make sure to mount them on a small plate to make it easier to switch them as you will need to do this many times.
God kv?ll Daniel,
Tack f?r din hj?lp, men jag vet inte n?gonting i encoder googla
eller p? en kodarens spr?k. Om du har lite information om ?mnet
kan jag f?rs?ka l?ra mig 73 och tack Joel F6cht. ps: jag vet inte
svenska! tack google
Le 02/12/2017 à 15:18, Daniel Ekman
SA2KNG a écrit?:
Om
du vill prova att k?ra den innan du f?tt encodern s? g?r det att
g?ra med str?mbrytare ist?llet, googla encoder s? ser du kanske
hur du beh?ver sk?ta dom f?r att ?stadkomma samma sak som att
rotera encodern.
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Re: QCX Troubleshooting - Please can you help?
Thanks for your efforts.
I've checked the voltage at AVcc, it's exactly 5 volts.
Can you check and let me know what voltage you are getting at Pins 9 and 10 please? I get no DC voltage at all, and no 20mhz signal either.
Best wishes,
Julian
G4ETS
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Re: qcx gps interface issue
The GPS data lines are the same as the CW/Keyer signals.
So be aware the QCX starts transmitting.?
(No open antenna , use a dummy load.)
I found every first transmision in wspr/beacon mode the BS170 became very hot.
High current about over 500 mA but NO HF output. Blowed 3 BS170.
Now on a heathsink no problem.
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Re: DVM/RF detector header Question
HI Barry.
No. You connect a lead onto the RF pin (middle) and then just touch/probe the other end on the antenna connector centre pin.
Make sure you have a 50ohm dummy load connected and then key the QCX to transmit whilst viewing the RF detector menu,
73
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If I plug in the gps it is powered, but something in the qcx is overheated. So I quickly unplug it.? gps is working fine still with 3S.? no shorts to ground on the pins. Getting 3.3k ohms between plus and minus power connection to the GPS. I am not readily seeing much in this circuit, I think I will check the regulator area.?
I did move the inductor as suggested, my strange behavior with the vfo resolution seems to be cured. Everything but gps interface is okay in qcx.
Curt
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Re: ZL1RS balloon flight - BB01
Looks like your flight is near halfway to South America. Glen N8WE
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Re: ZL1RS balloon flight - BB01
---- "Bob Sutton via Groups.Io" <zl1rs@...> wrote:
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DVM/RF detector header Question
So to read the approximate RF Power out on the QCX... I have to jumper the RF Input pin to the +V Output. Is that correct?
Thanks.
Barry. ?VE3ZLB
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Hi Ernie.
Sorry, is this still the FT-8 discussion we were having?
I don't have a beacon
3a.?
Re: FT8 for U3?
From: Ernie Hollingsworth
Date: Sun, 10 Dec 2017 06:05:47 PST
Is your beacon day or night? I'll look for you.
73 Ernie
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Hi OM,
Just bought one, thanks for post. Want to ruggedize a radio for field.
This will be internals.
------------------------
Any RPI connection?
73,
Steve
KL7JT/1
-------------------------
On Sun, Dec 10, 2017 at 6:20 PM, <N3SZ@...> wrote:
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Re: New Year's Eve Operation
I'm in - I'll be QRSS on 30m. As with some others, it'll be the first time I've used my U3S for anything other than WSPR so thanks for the puch!
73,
John AE5X
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Re: New Year's Eve Operation (how to configure your U3S)
Hi TrueBlue (that’s an unusual name),
Thanks - I enjoy getting all these modes running in the same frame.
It’s entirely dependant on band as to the number of spots. ?At the moment my U3S is transmitting on 10m and has been there since early this year - There are some grabbers operating on 10m and the Knights QRSS group are reasonably active with a lot of discussion this year about meteor scatter where pings have been seen from a few stations. ?
It’s not all about the instant gratification of WSPR :-)
I don’t expect many spots of JT9 on 10m but it’s seen fairly often on CW. ?I tried the TEST call but I seem to remember there was an issue with some feeders to the RBN totally ignoring the transmission when I used that and others reporting it multiple times. ?I was advised to use CQ as well as TEST (hence CQ G6NHU G6NHU TEST) and that works well.
Speaking to Hans at Newark, he did say that he’s managed to get RTTY in the firmware but it still needs debugging. ?I have no idea how close that is on the U3S but I’m in no hurry. ?And yes, RTTY is still used. ?I’ve had over 1,500 Qs this year using RTTY and that’s not just contest Qs.
73 Keith G6NHU
toggle quoted message
Show quoted text
On 10 Dec 2017, at 20:41, TrueBlue < 44-40@...> wrote:
Great how-to!?
I would question why you are calling CQ in the second message.? If it's to trigger ReverseBeacon, TEST will do it as well and is more appropriate for a non-responding beacon.?
You certainly are an optimist!? I routinely run four modes per frequency in a ten-minute frame and since the advent of FT8 get perhaps three hits a day on JT65 and maybe one hit every week or two on JT9.? I suspect I'd have to wait ten years to get a hit on slow Hellschreiber or FSKCW.? At least WSPR remains relatively active.
I am unaware of the impending RTTY firmware upgrade; is that going to be with the FT8 firmware release?? Is anyone actually using RTTY?
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Daniel Ekman SA2KNG
martin
Nick VK4PP
Keith, G6NHU