Date   
Re: Will this balun work ok? #40m #antenna

Cor Beijersbergen
 

Hello John,

 

Your balun looks exactly like the ones sold on ebay now for listening. These are 1:9 with a core of unknown properties.

You have to make a decision, you could make a resonant halfwave endfed or a random length non resonant endfed.

 

Halfwave resonant:

Your wire length is almost correct, but the balun needs to be 1:49. You need a SWR meter to prune the wire to length, after that you don’t need a tuner and you may work other bands as well (20, 15 and 10).

 

Random length endfed:

The wire length is wrong, because it is almost resonant on 40 and with a random length piece of wire and a 1:9 balun it should not be. And you will need a tuner.

By choosing the correct length of wire you could work more bands also.

 

General:

The toroid in the balun is very small and the material is of unknown properties. I recognise the balun, it is being sold on ebay now as a very cheap balun for listening only. I don’t know what kind of transmitter you intend to use, what the power level is an what internal protection of the power stage it has but I would not risk my transmitter on this balun.

But it lends itself for improvement, a new toroid with a 1:49 winding of the right size (a 140-43 will not fit in the housing) may give you a decent balun for a halfwave endfed.

Google for “halfwave endfed” or “EFHW” and you will find lots of information.

 

Succes!

Cor – PA4Q

 

 

 

From: QRPLabs@groups.io <QRPLabs@groups.io> On Behalf Of JohnL
Sent: Friday, 2 August 2019 02:39
To: QRPLabs@groups.io
Subject: [QRPLabs] Will this balun work ok? #40m #antenna

 

i have this balun from an old end fed 1/2 wave antenna that I was using for listening.  I cut a new 70ft chunk of speaker wire for transmitting on 40m.  I don’t have an antenna tuner and I am just getting started with my first radio.  Does this balun look okay to use and it won’t harm the radio?  I doesn’t quite look like other 1:9 end fed 1/2 wave baluns that I have been reading about.  Here are some picts. 

Thanks 
johnl

Re: QCX 40 Headphone Noise #qcx

Stephen Farthing G0XAR JO92ON97
 

Nick,

I’m in the EU so it won’t be practical to ship it to me. I’m sure there are plenty of helpers across the pond in your country. 

Regards, 

Steve 

Will this balun work ok? #40m #antenna

JohnL
 

i have this balun from an old end fed 1/2 wave antenna that I was using for listening.  I cut a new 70ft chunk of speaker wire for transmitting on 40m.  I don’t have an antenna tuner and I am just getting started with my first radio.  Does this balun look okay to use and it won’t harm the radio?  I doesn’t quite look like other 1:9 end fed 1/2 wave baluns that I have been reading about.  Here are some picts. 

Thanks 
johnl

Re: QCX 40 Headphone Noise #qcx

mx201er@...
 

I am located in the "four corners" area; Farmington, New Mexico.

-Nick KI5DAF

Re: 8,000 QCX kits...

jjpurdum
 

If anyone took my suggestion as being critical of anyone or any thing, that was not the case at all. I was simply trying to push the ball back into Hans' court so he can decide without us bugging him.

Jack, W8TEE

On Thursday, August 1, 2019, 4:21:46 PM EDT, Bill Cromwell <wrcromwell@...> wrote:


Obviously number 10,000 is some time into the distant future. Further it
so obviously up to Hans. It is not our radio to sell (yet). I think the
whol idea of this thread is to gage trhe interest in these radios.

It's all in fun. If anybody here doesn't like fun maybe ham radio is not
for you.

And now this particular nobody will just shut up.


On 8/1/19 4:07 PM, jjpurdum via Groups.Io wrote:
> I kinda agree. We're going to use up bandwidth for sometime, and that
> time length is unknown right now. If Hans wants to do this, perhaps the
> best way to proceed is to have Hans announce: 1) he does want to sell
> unit 10,000, and 2) he wants to hold it back for auction. Given that,
> Hans could post a notice here saying: "Serial number 10000 has been
> produced and I am offering it for auction. You have XX days to place a
> bid using this email address XXXXXX@.... I will announce the
> winner at (XX+5) days from now."
>
> If he wants to set up a private email account now, fine, as that would
> avoid postings that are of little interest to those who are not
> interested in the unit.
>
> Jack, W8TEE

--
bark less - wag more



Re: 8,000 QCX kits...CHINA

Steve in Okinawa
 

 There are more Chinese stations in the air every day on the HF bands, and CW seems to be very popular. Granted, many are using keyboards/decoders and don't stick around for a nice ragchew, but at least they are having a go. And I hear a /QRP now and then as well. I haven't heard about any SOTA there, but it's catching on in Taiwan and Hong Kong.  73 from Okinawa JS6TMW 

Re: 8,000 QCX kits...

Glen Sr
 

I apologize to this group of wonderful people for my silly bid! And I mean it!! Regards. Glen N8WE

-----Original Message-----
From: Bill Cromwell
Sent: Thursday, August 1, 2019 4:21 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] 8,000 QCX kits...

Obviously number 10,000 is some time into the distant future. Further it
so obviously up to Hans. It is not our radio to sell (yet). I think the
whol idea of this thread is to gage trhe interest in these radios.

It's all in fun. If anybody here doesn't like fun maybe ham radio is not
for you.

And now this particular nobody will just shut up.


On 8/1/19 4:07 PM, jjpurdum via Groups.Io wrote:
I kinda agree. We're going to use up bandwidth for sometime, and that time length is unknown right now. If Hans wants to do this, perhaps the best way to proceed is to have Hans announce: 1) he does want to sell unit 10,000, and 2) he wants to hold it back for auction. Given that, Hans could post a notice here saying: "Serial number 10000 has been produced and I am offering it for auction. You have XX days to place a bid using this email address XXXXXX@.... I will announce the winner at (XX+5) days from now."

If he wants to set up a private email account now, fine, as that would avoid postings that are of little interest to those who are not interested in the unit.

Jack, W8TEE
--
bark less - wag more

Re: T1 wire gauge

Greg Walters
 

Haha! I may need new glasses (I have bifocals, plus used a big magnifying glass), but this was my 3rd 40 meter QCX. All 3 have 38-39 windings on the 3rd secondary. They all align quite nicely. 

I really enjoy building these kits. I'm excited to get my hands on the QSX once Hans gets it completed. I know he'll have 99% of the bugs worked out before he releases it. That's why his kits are so good. 
--
73,
Greg
KY4GW

Re: QCX 40 Headphone Noise #qcx

Stephen Farthing G0XAR JO92ON97
 

Nick, 
Where are you located?
Steve G0XAR 

Re: 8,000 QCX kits...

Bill Cromwell
 

Obviously number 10,000 is some time into the distant future. Further it so obviously up to Hans. It is not our radio to sell (yet). I think the whol idea of this thread is to gage trhe interest in these radios.

It's all in fun. If anybody here doesn't like fun maybe ham radio is not for you.

And now this particular nobody will just shut up.

On 8/1/19 4:07 PM, jjpurdum via Groups.Io wrote:
I kinda agree. We're going to use up bandwidth for sometime, and that time length is unknown right now. If Hans wants to do this, perhaps the best way to proceed is to have Hans announce: 1) he does want to sell unit 10,000, and 2) he wants to hold it back for auction. Given that, Hans could post a notice here saying: "Serial number 10000 has been produced and I am offering it for auction. You have XX days to place a bid using this email address XXXXXX@.... I will announce the winner at (XX+5) days from now."
If he wants to set up a private email account now, fine, as that would avoid postings that are of little interest to those who are not interested in the unit.
Jack, W8TEE
--
bark less - wag more

Re: 8,000 QCX kits...

jjpurdum
 

I kinda agree. We're going to use up bandwidth for sometime, and that time length is unknown right now. If Hans wants to do this, perhaps the best way to proceed is to have Hans announce: 1) he does want to sell unit 10,000, and 2) he wants to hold it back for auction. Given that, Hans could post a notice here saying: "Serial number 10000 has been produced and I am offering it for auction. You have XX days to place a bid using this email address XXXXXX@.... I will announce the winner at (XX+5) days from now."

If he wants to set up a private email account now, fine, as that would avoid postings that are of little interest to those who are not interested in the unit.

Jack, W8TEE

On Thursday, August 1, 2019, 4:01:13 PM EDT, Alan de G1FXB via Groups.Io <g1fxb@...> wrote:


Time out for a Reality check guys......

1/.??? The suggestion was made by a no-body, and not Hans.....

2/.??? as its a landmark maybe he wants to keep it, if anyone's children are likely to become licenced it could be his, or his wife......

3/.??? If it was released for sale. Serial No# 10,000 is sometime away perhaps in 2020, why are you bidding for something that doesn't exist?


Alan

Re: 8,000 QCX kits...

Alan de G1FXB
 

Time out for a Reality check guys......

1/.??? The suggestion was made by a no-body, and not Hans.....

2/.??? as its a landmark maybe he wants to keep it, if anyone's children are likely to become licenced it could be his, or his wife......

3/.??? If it was released for sale. Serial No# 10,000 is sometime away perhaps in 2020, why are you bidding for something that doesn't exist?


Alan

Re: 8,000 QCX kits...

Glen Sr
 

I  BID $70.00 –10000. Glen N8WE
 

From: Nels Nelsen
Sent: Thursday, August 1, 2019 12:21 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] 8,000 QCX kits...
 
I think the bidding, if any,  would start at $50 and go in increments of the same. Stop and think.
 
On Thu, Aug 1, 2019, 8:52 AM Bill Cromwell <wrcromwell@...> wrote:
Hi,

I will start with a bid of five U.S. dollars. Not that I really expect
to get it for that (can always dream) but just to get the bidding started.

73,

Bill  KU8H

On 7/31/19 6:22 PM, John Young wrote:
> Who will make the opening bid?
>
>
>
> On Wed, Jul 31, 2019, 15:55 Karl Schwab via Groups.Io
> <ktschwab=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:
>
>     I really like Alan's idea for the 10,000 kit; it would be a very
>     special one, indeed!  73, Karl, KO8S
>


--
bark less - wag more



Re: QCX Challenge

Tony McUmber
 

Hello, Andy,

This could be great fun!  How about I call you on/about 7032 Mhz between 0335z and 0345z (approx.) on 3 Aug 19 and, if no QSO, same again on 05 Aug 19?  Perhaps some other sked would suit; if so, let me know.

My QCX 40 operates 2w + (maybe more, but I don't like to brag) into an Inverted Vee antenna mounted about 18 ft (6m) above ground.  Best arrangement I can make, but it seems to work OK and SWR is nil.  I can hear nothing when band is closed and everything all at once when band is open.  I hope to hear you and make that QSO.

73, Tony N0BPA

Re: 8,000 QCX kits...

Mike
 

Oops,for QSX please read QCX... sorry.

On 1 Aug 2019 at 19:52, Mike wrote:


My bid for QSX No10K

is, $100.00 ( that's 1cent per kit sold. )

73, Mike G8NXD

On 1 Aug 2019 at 11:51, Bill Cromwell wrote:

Hi,

I will start with a bid of five U.S. dollars. Not that I really expect
to get it for that (can always dream) but just to get the bidding
started.

73,

Bill KU8H

On 7/31/19 6:22 PM, John Young wrote:
Who will make the opening bid?



On Wed, Jul 31, 2019, 15:55 Karl Schwab via Groups.Io
<ktschwab=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:

I really like Alan's idea for the 10,000 kit; it would be a very
special one, indeed!  73, Karl, KO8S

--
bark less - wag more





Re: 8,000 QCX kits...

Mike
 

My bid for QSX No10K

is, $100.00 ( that's 1cent per kit sold. )

73, Mike G8NXD

On 1 Aug 2019 at 11:51, Bill Cromwell wrote:

Hi,

I will start with a bid of five U.S. dollars. Not that I really expect
to get it for that (can always dream) but just to get the bidding started.

73,

Bill KU8H

On 7/31/19 6:22 PM, John Young wrote:
Who will make the opening bid?



On Wed, Jul 31, 2019, 15:55 Karl Schwab via Groups.Io
<ktschwab=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:

I really like Alan's idea for the 10,000 kit; it would be a very
special one, indeed!  73, Karl, KO8S

--
bark less - wag more


Re: 8,000 QCX kits...

Bill Cromwell
 

Hi,

I did stop and think. Did I mention it was only to get the bidding started. Not the criticizing ;) My mistake was thinking to actually get the bidding started. So far...no more nids. Maybe I am the winner after all. Hans may have some of his own thoughts about *that*!

73,

Bill KU8H

On 8/1/19 12:21 PM, Nels Nelsen wrote:
I think the bidding, if any,  would start at $50 and go in increments of the same. Stop and think.
On Thu, Aug 1, 2019, 8:52 AM Bill Cromwell <wrcromwell@... <mailto:wrcromwell@...>> wrote:
Hi,
I will start with a bid of five U.S. dollars. Not that I really expect
to get it for that (can always dream) but just to get the bidding
started.
73,
Bill  KU8H
On 7/31/19 6:22 PM, John Young wrote:
> Who will make the opening bid?
>
>
>
> On Wed, Jul 31, 2019, 15:55 Karl Schwab via Groups.Io
> <ktschwab=yahoo.com@groups.io <mailto:yahoo.com@groups.io>
<mailto:yahoo.com@groups.io <mailto:yahoo.com@groups.io>>> wrote:
>
>     I really like Alan's idea for the 10,000 kit; it would be a very
>     special one, indeed!  73, Karl, KO8S
>
--
bark less - wag more
--
bark less - wag more

Re: Not a bad day's work...for a mostly 17m radio

sean
 


Thanks Bill, I am very interested in trying this,  i really like the antenna (GADS),  that is actually a great idea. Just curious,  how was the SWR's? 
The QCX is a very cool project. 

Thanks for the information. I will let you know how it turns out. 

Great hobby.

73's
De kc2lwx 
Sean



On Thu, Aug 1, 2019 at 7:35 AM, n4qa at_hotmail.com
<n4qa@...> wrote:
Hi Sean and the group.
I began with a stock QCX-17 Rev 4.
Disconnected L1, L2, L3, C25, C26, C27, C28   ( L4, C30, T1 remain intact ).
Wire jumper C29 ( where formerly connected to C27, L3 ) to rf jack 'hot' on pcb.
Placed a 10m bpf in coax feeding rf jack. 
3.9 Band = 10m
VFO A = 28075.5 for FT8 reception
All other settings for I-Q, BPF etc remain as per stock QCX-17.

Antenna is the GADS! ( Gutter And Down Spout! ) fed via Icom AH-4 remote autotuner.

WSJT-X FT8 decodes have spanned roughly -24 to +15 dB snr using this setup.

However, and while I'm having great fun...

Disclaimer:
Mine is far from the best method for using a QCX rig for 10m reception !

All questions & observations are most welcome.

72 / 73,
Bill, N4QA

Re: QCX 40 Headphone Noise #qcx

mx201er@...
 

I've followed the troubleshooting guide as described in the previous post, but I'm at a loss with regards to next steps; I've reviewed T1 several times and it doesn't look like any of the coils are wound the wrong direction, which is what I would expect to be causing my incorrect phase shift at T1. Unfortunately, with a new baby and no free time, I see this sitting on a shelf for a few years and never getting fixed.. is there anybody that is troubleshooting/fixing these for a fee?

Thanks,
Nick

Re: 8,000 QCX kits...

Nels Nelsen <nels.nelsen@...>
 

I think the bidding, if any,  would start at $50 and go in increments of the same. Stop and think. 


On Thu, Aug 1, 2019, 8:52 AM Bill Cromwell <wrcromwell@...> wrote:
Hi,

I will start with a bid of five U.S. dollars. Not that I really expect
to get it for that (can always dream) but just to get the bidding started.

73,

Bill  KU8H

On 7/31/19 6:22 PM, John Young wrote:
> Who will make the opening bid?
>
>
>
> On Wed, Jul 31, 2019, 15:55 Karl Schwab via Groups.Io
> <ktschwab=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:
>
>     I really like Alan's idea for the 10,000 kit; it would be a very
>     special one, indeed!  73, Karl, KO8S
>


--
bark less - wag more