Jim, glad to here that You dropped a zero! Otherwise I would have to look for an alternative capacitor. But having a Q of 300 is OK for me, even if I loose some power in it.
73 Axel DF1ET
|
Sorry Axel I guess I dropped a zero when I typed 30.? Still a capacitor in the hundreds range is terrible and a good capacitor should be 10 times that or more. The capacitor I use in my magloop has a Q factor of 5000 for example.? Many people use the poor plastic dielectric variables designed for tuning AM transistor radios of the '70s in antenna tuners and are happy making tons of QSO's.? Losing power in your tuner and transmission line does not mean you will not make contacts.? You will, and go ahead and get on the air with whatever you can manage.? As someone pointed out, even if you lost 50% of your transmitted power, your signal would be received 3db down from what it could be, and that is only half an S unit.? If you really get into QRPp and want to start working at 100mw or less, then you start to consider the crazy stuff like those precious milliwatts. Otherwise just go build something and have fun!
Joe ve3vxo
On Sun, Apr 7, 2019 at 12:47 AM, Joe Street wrote:
"polyvaricon" AM tuning capacitors (with a Q factor of about 30! according to W7ZOI's tests)
I worry about this, because using other tuning capacitors than these would be difficult ("big"). I did a search for W7ZOI's test and found this . According to page 19, he measured Q = 540 at 10 MHz and Q = 340 at 6.5 MHz. Can I relax or is a the value of 30 still right?
73 Axel DF1ET
|
George, try the Elecraft W1 watt/SWR meter kit.? Very neat design and measures down to about a tenth of a watt.? Also provides a neat light show in operation.
Somewhat pricey but a very neat kit.? A see-through acrylic enclosure is available online.
73, Jim KM5M
|
Re: QSX - antenna work in the rain
he he, guilty as charged.
But, the rain of the century here? finally stopped a week or so ago, so most signals from the GADS! are now somewhat dry.
Recent N4QA RBN spots, to the untrained eye, might seem to be from single- or multi-band radio(s) designed for those bands.
In reality, though, many were from the QCX-17, operating on the 17, 20 and 30m bands.
And, RBN doesn't show the WWV & WWVH etc sigs heard on the QCX-80, so I must report those here :0)
Good luck with your new killer antenna !
72 / 73,
Bill, N4QA
|
Re: QSX - antenna work in the rain
Hi Bill,
You are right but I am not brave enough - or is that not foolish enough :)
I just went out in a misting rain and deployed 100 feet of green THHN up and over the top of the tree. I was suddenly inspired to go and get another 100 foot roll and deploy all that wire as a delta loop. I have some convenient places to anchor the lower corners. If that won't get out to somewhere I will be selling my radios and shopping for stamps or something. Or maybe get that 100 watt Kenwood down off the shelf <heaven help us>.
Speaking of storms and rain are you the guy that uses the GADS antenna? I am going to put you in my stalking machine, aka RBN.
toggle quoted message
Show quoted text
On 4/8/19 9:42 AM, n4qa at_hotmail.com wrote: Hi there, same name.
Fancy meeting you here.
Bill, shouldn't antenna erecting be done while stark naked in a roaring thunderstorm?
Better wait until after dark though!
72 / 73,
Bill, N4QA
--
bark less - wag more
|
Re: QSX - antenna work in the rain
Hi there, same name.
Fancy meeting you here.
Bill, shouldn't antenna erecting be done while stark naked in a roaring thunderstorm?
Better wait until after dark though!
72 / 73,
Bill, N4QA
|
Re: QSX - antenna work in the rain
Hi,
I think putting up antennas under severe thunderstorms would give the best results. I am not brave enough (foolish enough?) to try that. It looks like it will rain in a little while. I am waiting for that and then I'll haul the antenna up <evil grin>.
By the way, I am waiting for an order from QRP Labs to be delivered and watching for the QSX so I can order one.
73,
Bill KU8H
toggle quoted message
Show quoted text
On 4/8/19 9:00 AM, Joe Street wrote: canadian wisdom says freezing rain is best.
On Mon, Apr 8, 2019 at 3:14 AM Ronan Cantwell <ronancantwell@... <mailto:ronancantwell@...>> wrote:
Ideally this work should be carried out later in the evening in
failing light to ensure maximum inverse-adverse law effects.
--
bark less - wag more
|
Re: QSX - antenna work in the rain
canadian wisdom says freezing rain is best.
Ideally this work should be carried out later in the evening in failing light to ensure maximum inverse-adverse law effects.
|
An even simpler method for going "...where no man has gone before"...ok, few men...outside the design band of your QCX
Just read the QCX assembly manual, section 4.9 Frequency Presets.
The manual which I have is Rev 1.11, and it's on page 75.
Have fun !
72 / 73,
Bill, N4QA
ps
'Mr 72' is Oleg Borodin, RX3G ( formerly, RV3GM )
who says that 72 means "Wishing you good QRP:"
See:
|
Re: First time /p for some minutes
#40m
#qcx
Jens,
That's great and congrats! Perhaps in the right condx, and after my sunset here on the east coast, we can link up transatlantic. .unfortunately for you that would be a night time trip. My QCX 40 is taking a break...and disassembled, as the ammo can dries from its 1st coat of primer. Paint may have to wait a few weeks as after today, temps fall low again.
|
First time /p for some minutes
#40m
#qcx
Hi all,
I just wanted to show you my first attempt to work with the QCX40 in portable use. Yesterday, I decided to cycle to the only "hill" in my surroundings in northern Germany (15m a.s.l. instead of 2m) and throw my not-yet-fully-optimized 13m of wire in the woods (only about 1-2 m above ground). The "antenna" was connected with an 1:9 UnUn, and I was too lazy to bring my antenna tuner. As a counterweight, I first used the wheel of my bike, but a simple 2m lab wire on the ground and mass connection to the minus of the battery worked better. Better means: the TX sidetone of the QCX was way clearer in this configuration than with the bike as a counterweight. Having a clear sidetone while transmitting seems to be an indicator that not too much HF comes back into the QCX.
I was able to make 9 short QSOs in 30minutes, answering CQs from the SP-DX-Contest (all 500¨C800 km). The RBN heard me up to 1000km distance with no directional preference. Some passers-by asked curious questions on what I was doing :-) Oh, and I was using the micro switch of the QCX as the straight key, which works quite well for me.
73 de Jens, DG2FDD (/p)
|
Re: Regarding QCX-series rigs, anyone out there bypassing the ATmega328P and directly freq-programming the SI5351A_MSOP ( SPI-style ) ?
72 historically was begun by Oleg Borordin, a Russian QRP guru. ?Sorry Oleg, forgot your call. David J. Wilcox K8WPE¡¯s iPad
toggle quoted message
Show quoted text
On Apr 7, 2019, at 10:41 PM, Stephen VE6SVJ < sjaarsveldt@...> wrote: Oh ! Thank you. I thought we were just being short-changed on the 73¡¯s for some reason. ;-)
S. Sent from an electronic device. On Apr 7, 2019, at 20:36, jjpurdum via Groups.Io < jjpurdum@...> wrote:
72 is a 73 sign-off from a QRP operator.
Jack, W8TEE
On Sunday, April 7, 2019, 10:08:53 PM EDT, Stephen VE6SVJ < sjaarsveldt@...> wrote:
Excuse my ignorance... what is 72 ?
Stephen VE6SVJ Sent from an electronic device. On Apr 7, 2019, at 19:57, n4qa < n4qa@...> wrote: Just wondering...?
This now reminds me of the progression that occurred with my freq-control apps ( see attached ) for the Small Wonder Labs DSW-II-series rigs back around the turn of the millennium.
Funny how history sometimes repeats itself...
72 / 73,
Bill, N4QA
<Screenshot _43_.png>
|
Re: Listening to WWV & WWVH on 5000 kHz this morning, on the QCX-80
Are we supposed to understand what you are talking about in this post???
73, Ben
|
Re: 20m QCX RF Output Question
#qcx
I removed 2 turns on L1 and L3 in QCX 20m. I removed 1 turn on L2. At 13.8V I now have 5.2W at 50ohm load.
With the QCX 40m I didn't have to do anything and the result is the same.
Zdenek OK2BQN
|
Actually, for me sometimes the message does not start to send. I then can select it, but no matter what I press afterwards, the transmission just does not start ¨C it goes back to the normal frequency display. Switching off and on fixes this. I have not yet systematically looked into that issue, if e.g. the action before or the keyer mode ("practice on") has an influence on this behavior.
73 de DG2FDD, Jens
|
Re: QSX - antenna work in the rain
Ideally this work should be carried out later in the evening in failing light to ensure maximum inverse-adverse law effects.
|
Hello, Roger.
From the QCX 'Cheat sheet' :
Encoder dbl or long press: choose stored message. Then Left to send repeatedly, Centre to send once, or Right to cancel?
I would only add that, immediately after "Encoder dbl or long press", rotate Encoder to select stored message 1 through 12.
72 / 73,
Bill, N4QA
|
Had some good contacts with my 80m QCX CW TRX but having saved a message I cannot find how to send it. There must be an easy solution ?
Roger Taylor
G4CGU
.
|
Re: Regarding QCX-series rigs, anyone out there bypassing the ATmega328P and directly freq-programming the SI5351A_MSOP ( SPI-style ) ?
Oh ! Thank you. I thought we were just being short-changed on the 73¡¯s for some reason. ;-)
S. Sent from an electronic device.
toggle quoted message
Show quoted text
On Apr 7, 2019, at 20:36, jjpurdum via Groups.Io < jjpurdum@...> wrote:
72 is a 73 sign-off from a QRP operator.
Jack, W8TEE
On Sunday, April 7, 2019, 10:08:53 PM EDT, Stephen VE6SVJ < sjaarsveldt@...> wrote:
Excuse my ignorance... what is 72 ?
Stephen VE6SVJ Sent from an electronic device. On Apr 7, 2019, at 19:57, n4qa < n4qa@...> wrote: Just wondering...?
This now reminds me of the progression that occurred with my freq-control apps ( see attached ) for the Small Wonder Labs DSW-II-series rigs back around the turn of the millennium.
Funny how history sometimes repeats itself...
72 / 73,
Bill, N4QA
<Screenshot _43_.png>
|
Re: Regarding QCX-series rigs, anyone out there bypassing the ATmega328P and directly freq-programming the SI5351A_MSOP ( SPI-style ) ?
72 is a 73 sign-off from a QRP operator.
Jack, W8TEE
On Sunday, April 7, 2019, 10:08:53 PM EDT, Stephen VE6SVJ <sjaarsveldt@...> wrote:
Excuse my ignorance... what is 72 ?
Stephen VE6SVJ Sent from an electronic device.
On Apr 7, 2019, at 19:57, n4qa < n4qa@...> wrote: Just wondering...?
This now reminds me of the progression that occurred with my freq-control apps ( see attached ) for the Small Wonder Labs DSW-II-series rigs back around the turn of the millennium.
Funny how history sometimes repeats itself...
72 / 73,
Bill, N4QA
<Screenshot _43_.png>
|
David Wilcox K8WPE
Zdenek OK2BQN
Stephen VE6SVJ
jjpurdum