Date   
Re: QCX QSO Party 25th Feb 2019 #qcx #qrp-dx

N3MNT
 

One logging possibility is to create a user defined template for N1MM+ and share it here.  Then see if it can be reported on 3830Scores.  Will play with N1MM template later today.

Re: QCX QSO Party 25th Feb 2019 #qcx #qrp-dx

ajparent1/KB1GMX
 

I listened at various times the one thing that stands out is that while people
have VFO that big knob is apparently a scary thing.

At one point:
Listening on 7030khz I heard not less than 15 people and all within maybe 200hz. 
I could not copy any of them even with the big rig down to 100hz as they were
just one big pile.   Went plus .5khz heard 3, +1khz heard only 1!  Going down it
was not much better.  Under 7026 was nearly dead with a few widely spaced stations.
I found gaps greater than 1khz wide with not one signal in the 7020 to 7040 range.
Below 7020 its was pretty sparse.

As a result I didn't even try.  Lots of signals all trying to be on 7030 like they
were crystal controlled.  The upside was an amazing amount of activity
and the range of call fragments included a few likely listed.

Allison

Re: QCX 40 Ammo can update + R36 problem

Steve Raas - N2JDQ - FN13DD
 

Last night I shortened up the leads for r36, sw1, s2 & s3...heat shrank them all and routed them so that they wernt so short the qcx would be unservaceable but not to much extra either. Anyways, when all was said and done, I plugged in a 9v battery and only the display lit up. Imagine my panic! Red in the face, 45 minutes past when I physically go QRT, back hurting ...a real " %##@!!!!$$$$" moment! After a quick cigarette break, I calmed...and started to think a bit more rationally. "This ran for a week on the bench with 0 issues, what's different now?" I asked myself. Then Mr Murphy slapped the back of my head...the 9v battery! A quick 5 second check with the DMM , mmhmm....6.8vdc. Quickly I swap in my 13.8vdc supply...and it powered and ran flawlessly. Just imagine me thinking I bumped, broke or otherwise damaged some unknown component during my whole front panel build. Anyways, I was relieved, and continued on with testing, "turned the gain to minimum", plugged in the headset, tossed it on the skull mounted receiver and powered it up. AHHHHHHHHH!!!!!! Blasted with static! Panic set in again....but within seconds realized I just have swapped wires on R36, but now they are all heat shrank in place. Fixable...but annoying none the less. So after 2 micro panics,  and a tired soul, I QRT'D for the night after listening to some signals on a make shift antenna in the bacement work bench. Below are some photos, it's not quite done...but close, a few 3.5 mm cables, DC to the panel switch, and coax from board to panel connector is all that's left. Hopefully some will get a chuckle out of this, as I am now, even though last night I was not in any joking mood, twice! HIHI.


Steve Raas 
N2JDQ 

Re: QCX QSO Party 25th Feb 2019 #qcx #qrp-dx

John Kirby
 

Peter es all,

Here on the east coast (FM19) at 1300Z  7030 was a zoo of pandemonium
Literally dozens running more than one event on 7030 +/- 

May I suggest up 3  (7033 +/- )

tnx agn Peter
outstanding first go

72 73
John
N3AAZ

Re: QCX QSO Party 25th Feb 2019 #qcx #qrp-dx

Peter GM0EUL
 

Hi All
Here is the updated qso list as of this morning.

1300Z
Tony N0BPA  5 (1)  reported no qcx/qcx but logged by KE4RG as a qcx/qcx so added here
Colin M3WCK 3 (0)
Ken KE4RG  2 (2)
Peter GM0EUL 2 (0)
Hans TA4/G0UPL 2 (0)
Don K3RLL 1 (1)
Nick WB5BKL 0 (0)

1900Z
Hans TA4/G0UPL 7 (1)
Ian G4GIR  3 (2)
Bob N3MNT 2 (1)
Richard G0ILN  2 (1)
Nick WB5BKL  2 (0)
Peter GM0EUL 2 (0)
Colin M3WCK 0 (0)

I'll try and find a better way of submitting and displaying scores and comments before the next party on 25th March.

Great that there were plenty of QCX/QCX contacts.  33 QSOs altogether, of which 8 were 2-way QCX. Almost 1/4!

73
Peter GM0EUL

Re: No audio at BPF adjustment #antenna #alignment

Hans Summers
 

Hi Fred

From all the reports I have heard, and samples we take of stock, and the QCX kits we build here - I believe the failure rate of the audio gain pots to be very low - I think somewhat under 1%. 

Regarding QSX, QSX is internally a Software Defined Radio. During the early design stage I eliminated the audio gain potentiometer. This was not for reasons of reliability of the potentiometer. It was because both performance AND cost could be optimized without it. 

Performance-wise it was possible in the Digital Signal Processing to arrange a true logarithmic volume control (which is expensive if done with an analog pot). Furthermore, since the QSX has a stereo audio output, it permits adjustment of the relative volume between Left and Right channels. A dual-gang analog volume control would have cost more and had more tabs to break. The separate channels are useful for reception modes such as binaural reception, and the dual receiver option. The dual receiver option allows you to listen to two different frequencies, one in each ear; with a separation of several kHz (somewhere in the range 12-24kHz, not sure precisely yet). A 24-bit DAC is used, so that there is plenty of dynamic range available. 

Surprisingly, this approach also lowered the part-count and reduced the cost. 

Therefore there are in QSX, two rotary encoders; one to the left of the display and one to the right. Ordinarily left = volume, right = frequency tuning; but of course either one can serve multiple purposes and can be reconfigured by you as you wish. 

73 Hans G0UPL

On Tue, Feb 26, 2019 at 12:23 PM <fred.g3srf@...> wrote:
There seems to be a lot of posts relating to the audio gain pots breaking. I have used pots of various types for may years and have never had a mechanical problem. After many years service, some may go scratchy but that is the carbon track just wearing out.
Is the current failure rate due to a cheap version being supplied or due to the constructor mis-handling them.
If similar ones are to be supplied in the future QSX kits, perhaps it may be better to replace them at the outset.

Re: QRPp for the Ultimate 3

Chris Smith <me@...>
 

I would work out how much power you need maximum, set the U3S for that and measure it carefully in dBm. Then work out how much attenuation you need for your target power then build an external "step attenuator" of some description. Something you can switch in some 20dB, 10dB, 6dB, 3dB attenuators with toggle switches. Then you can switch in your entire desired power range without modifying the U3S and the step attenuator would be reusable for other projects or test requirements (they are very very useful).

I reckon you could build a very neat attenuator into a QRP labs custom undrilled case . Two BNCs on the back, toggle switches on the front. Something like this: http://lea.hamradio.si/~s53mv/dds/attenuator.html (but with less switches!)

--
73 Chris M0XTE

On Mon, 25 Feb 2019, at 15:49, Martin Peters via Groups.Io wrote:
Having great fun with the Ultimate 3, using it with tiny antennas, or using at outboard 10/20/30dB attenuator for down-to 200uW. But I'd like to reduce the power even further!
The mechanism I use for this at the moment is to abandon the U3 and use a PC/IC703/attenuator combo. That isn't exactly 'eco-friendly', tho, and I'd like to know if there's a way to reduce the power from the Ultimate 3. I'm already just running off 5 volts with the minimum PA configuration. Ideally, a pot, brought out to the front panel, but any suggestions welcome.

73 - Martin, G4EFE

Re: No audio at BPF adjustment #antenna #alignment

fred.g3srf@...
 

There seems to be a lot of posts relating to the audio gain pots breaking. I have used pots of various types for may years and have never had a mechanical problem. After many years service, some may go scratchy but that is the carbon track just wearing out.
Is the current failure rate due to a cheap version being supplied or due to the constructor mis-handling them.
If similar ones are to be supplied in the future QSX kits, perhaps it may be better to replace them at the outset.

Re: QCX QSO Party 25th Feb 2019 #qcx #qrp-dx

G4GIR
 

Hi Peter
 
Good event, couldn’t hear you on 40 but could see you hopping around on the RBN site.
 
For your info
3 qso’s 19:00 session:-
OK2BQN QCX
I1LCU NON QCX
TA4/G0UPL QCX
 
72/3
 
Ian G4GIR
 

From: Peter GM0EUL
Sent: Monday, February 25, 2019 10:37 PM
To: QRPLabs@groups.io
Subject: [QRPLabs] QCX QSO Party 25th Feb 2019 #qcx #qrp-dx
 
Hi All
Thanks to everyone who joined in with the qso party today.  These are the report in: Number of QSOs (qcx/qcx)

1300Z
Tony N0BPA  5 (1)  reported no qcx/qcx but logged by KE4RG as a qcx/qcx so added here
Colin M3WCK 3 (0)
Ken KE4RG  2 (2)
Peter GM0EUL 2 (0)
Hans TA4/G0UPL 2 (0)
Nick WB5BKL 0 (0)

1900Z
Hans TA4/G0UPL 7 (1)
Bob N3MNT 2 (1)
Nick WB5BKL  2 (0)
Peter GM0EUL 2 (0)
Colin M3WCK 0 (0)

So, a good start and some qcx/qcx contacts logged.  These are only the ops who reported back and I know there are more so if you had a go please let us know how you did.  I had fun and from what people are saying we should keep doing it but maybe alter the timing or add a session in the evening in the US (perhaps 0300Z).

Next time will be on March 25th 1300z, 1900z and perhaps an evening US session.

Both my rigs were running just over 2w, to a dipole on 40m and hexbeam on 20m. 

73
Peter GM0EUL

Re: QRPp for the Ultimate 3

Allan Nelsson
 

Martin,

 

I have done the same. I used the small fixed attenuators with F-connectors which are available in 3, 6, 10, 16, 20 and 24 dB or so. They are 75 Ohm, but I doesn’t matter. It works. J

 

73, Allan 5P9R/OZ5XN

 

 

Fra: QRPLabs@groups.io [mailto:QRPLabs@groups.io] På vegne af Martin Peters via Groups.Io
Sendt: 25. februar 2019 16:50
Til: QRPLabs@groups.io
Emne: [QRPLabs] QRPp for the Ultimate 3

 

Having great fun with the Ultimate 3, using it with tiny antennas, or using at outboard 10/20/30dB attenuator for down-to 200uW. But I'd like to reduce the power even further!
The mechanism I use for this at the moment is to abandon the U3 and use a PC/IC703/attenuator combo. That isn't exactly 'eco-friendly', tho, and I'd like to know if there's a way to reduce the power from the Ultimate 3. I'm already just running off 5 volts with the minimum PA configuration. Ideally, a pot, brought out to the front panel, but any suggestions welcome.

73 - Martin, G4EFE

Fw: [QRPLabs] QCX QSO Party today

G4GIR
 

Hi All
 
Well was very pleased to get 1 non QCX with IU1LCU Andrea and 2 QCX – QCX QSO’S first was with Zdenek OK2BQN and the second with Hans TA4/G0UPL, Zdenek was a good consistent signal, and Hans was as you described hard going but a good QSO.
This now gives me 4 QCX – QCX QSO’s.
 
Couldn’t make the earlier slot.
However, lets do it again some time.
 
72/73 Ian G4GIR
 

From: Hans Summers
Sent: Monday, February 25, 2019 8:22 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] QCX QSO Party today
 
Hi Peter
 
I had 7 QSOs all back to back, and I have to admit some pain in my index finger... too much gripping that microswitch LOL. This particular QCX is unboxed and so I hold the board still on the table with my left hand while hammering the key with my right index finger; but found myself all the time also pressing on the nylon spacer just right of the microswitch, with my right ring finger. Not a good habit, must stop that.
 
Of those 7 QSOs, very pleased to report one QCX, Ian G4GIR, very hard to copy, but we managed it. I had some nasty QRM this end otherwise it would have been easier. It started off on about 7031 but it got broader and broader and crept down onto me at 7029. If I got down another couple of kHz it gets noticeably quieter.
 
Anyway - 7 QSOs on 7029 from 1900-2000Z:
 
Sasha E74SL
Vic R6AF
Sergey R2VQ
Igor RX6FJ
Gena UV7QG
Ian G4GIR (QCX QRP!)
Prodan YU1SY
 
Many thanks Ian, my first ever QCX-QCX QSO. It sounds magnificent though I do say so myself ;-)
 
I will have my 20m QCX operational by the next time.
 
73 Hans G0UPL
 
 
 
On Mon, Feb 25, 2019 at 11:09 PM Peter GM0EUL <gm0eul@...> wrote:
Another two QSOs for me this evening.  Neither was a qcx and neither was qrp this time.  EA4OR, Ignacio, a fellow CWops member but the first time I've worked him other than in the CWT at about 30wpm, where I can just about hang onto the exchange!  Nice to chat a bit at a more manageable speed.  And Paolo, IU1FOV running 50 watts to a dipole.

I could hear a few people working Hans and occasionally bits of his call sign but not enough to manage a qso.  It wouldn't take much more though to get through and I think 20m at 1300 would be a definite possibility.  Overall I think the bands were poor today.

I'll trawl through the reflector and my emails and post a list of any reports I find.

73
Peter GM0EUL 

Re: No audio at BPF adjustment #antenna #alignment

Stephen VE6SVJ
 

This sounds similar to my recent trouble... try swapping out the audio gain pot. Worked for me... except I busted the second one and now need to replace it again.

The 0 Volt and 0.01W... to get a Volt reading in menu 9, you need to jumper the measurement and DVM pins. You also need to jumper them to use the battery level display.

73,

Stephen.
VE6SVJ

Re: QCX QSO Party 25th Feb 2019 #qcx #qrp-dx

Hans Summers
 

Hi Peter

Many thanks for organizing, it was fun! 

This morning I find my right hand still hurts. I think that habit of holding the bottom right nylon spacer with my right ring finger at the same time as keying with my right index finger, is a bad one. 

I think adding an 0300Z hour too is a great idea. I would join that one too. Though I have never reached US from here on CW.

73 Hans G0UPL

On Tue, Feb 26, 2019 at 1:37 AM Peter GM0EUL <gm0eul@...> wrote:
Hi All
Thanks to everyone who joined in with the qso party today.  These are the report in: Number of QSOs (qcx/qcx)

1300Z
Tony N0BPA  5 (1)  reported no qcx/qcx but logged by KE4RG as a qcx/qcx so added here
Colin M3WCK 3 (0)
Ken KE4RG  2 (2)
Peter GM0EUL 2 (0)
Hans TA4/G0UPL 2 (0)
Nick WB5BKL 0 (0)

1900Z
Hans TA4/G0UPL 7 (1)
Bob N3MNT 2 (1)
Nick WB5BKL  2 (0)
Peter GM0EUL 2 (0)
Colin M3WCK 0 (0)

So, a good start and some qcx/qcx contacts logged.  These are only the ops who reported back and I know there are more so if you had a go please let us know how you did.  I had fun and from what people are saying we should keep doing it but maybe alter the timing or add a session in the evening in the US (perhaps 0300Z).

Next time will be on March 25th 1300z, 1900z and perhaps an evening US session.

Both my rigs were running just over 2w, to a dipole on 40m and hexbeam on 20m.  

73
Peter GM0EUL

Re: Need help troubleshooting new assembly, very low audio levels

Stephen VE6SVJ
 

!!! Thank you !!! They're soft enough to cut and then just pull out the remaining bits with tweezers. Great idea !

73,

Stephen.
VE6SVJ


On Mon, 25 Feb 2019 at 14:33, Chopper <bob@...> wrote:
If you are sure the pot is dead, cut the leads then remove the individual leads one at at time.  Much easier than trying to take it out with the item intact.

Re: Clock - #ND yields yesterday's date #nd

Curt M.
 

This is a known bug in firmware C1.02a. Hans is aware of it and it’s on his to do list. A lot of us are anticipating a fix but he’s quite busy with the QSX. I’m sure we’ll see the fix at some point. 

Curt M.

Clock - #ND yields yesterday's date #nd

Jerry / K0ES
 

Re: Shack Clock. I changed line #2 to read "Local #ND:#NM#LH:#LM"

Line #1 is the default and reads correctly "25Feb19X22:59:28" where X is the pulsating heart as I have connected the GPS unit.
Line #2 reads "LOCAL 24Feb15:59" - it should read 25Feb.

I'm in Denver where local time is -7UT. The UT is correct. Any thoughts? Thanks.

Jerry / KE0PRQ

Re: random dashes on QCX40

KI7MWA
 

Stephen, thanks.  Actually I found the noise blanker on my own (helps if you read the whole operating manual, nu?), and now (at 20) not decoding noise...though the hams trying to contact me from Alpha Centuari are probably pissed...

QCX assembly manual, Section 5.4, errata?

KI7MWA
 

From the top of page 111 of the QCX Rev 1.11 assembly manual, referring to the implementation of the transmit/receive switch:

     "The switch wouldn't provide enough attenuation to mute an operating receiver, but during receive, our receiver isn't operating..."

Shouldn't this be:

    "The switch wouldn't provide enough attenuation to mute an operating receiver, but during transmit, our receiver isn't operating..."

Or is this something I'm totally failing to understand?

Re: Location of documents to configure the relay-switched low-pass filter (LPF) kit

ve3smf
 

Allison,
The SBX-11/SBX-11A can be used from 160m to 40m, so that only gives me 4 bands: 160m, 80m, 60m and 40 m to use on SSB.  The original unit had only four channel positions, and I need four bands, so I was thinking of just using the original front switch.  The original switch is five (5) wafers. The wafers on the switch have 5 contacts, and are used with one contact being IN, and the other four contacts are the OUT to the various Filters.  Most of the wafers have a second set of contacts, to get the output from the filter, and then the one line back to the main circuit board.   I wanted to keep away from using the relays (which could be used) to avoid any more power overhead when transmitting.  I would be using the transceiver on the original 12 VDC "D" cells.  The receive current on the SBX11/SBX-11A is about 30 mA, which is amazingly low. That is what makes this radio perfect for cold weather use. 

Relays would be nice IF I was just using the radio at home.  The main objective of this modification is to get this portable radio back into the field.

I use a modification on the SBX-11/SBX-11A that was used by the Government of Canada for NCR in the Polar Shelf Project to only use on crystal per channel set (Simplex).  That relay is only used
on transmit by the PTT.  I documented that modification, and have it on the Yahoo Spilsbury SBX-11/SBX-11A group.  

By using the FCC-1/FCC2 DSS VFO, increases the current draw by the DSS VFO, which is more than the entire radio on receive. Digital is nice, but can increase the current overhead. 

Lots of combinations that can be used for the QRP-Lab filter board.  Sort of a Swiss army knife design.  Keep the questions and ideas coming! 

73 Stuart VE3SMF/VE8SMF/VA3YO

No audio at BPF adjustment #antenna #alignment

Gary Bernard
 

Greetings to all. I'm a really old ham, tubes and transformers etc. and the microprocessor stuff I don't understand.
I finished a QCX 20. The display works and I can access all menu items. However I do not have side tone when adjusting the BPF and C1 seems to have no effect. There is a low level hum  and the gain control has no effect..
When I go in to menu 9 it shows zero volts and.01 watt.
A series of T's will show on the display.
I have checked all solder joints, have continuity at the toroids and T1. Same with the gain control.
I guess I'm at a loss as to what should be the next step.Any help would be much appreciated.
Regards, Gary W0CKI