Date   

Re: Chinese Pixie Part II

ai9e_qrp@...
 

I fired up my Chinese Pixie last night.  The receiver is surprisingly sensitive, with MDS of about -115 dBm.  The sensitivity comes at a price, though.  The 5 kW AM station 20 miles up the road from us came through quite strong, as did a S9+ 60 Hz hum if I grounded the board.  Once night fell, and the AM station powered down, I could hear several CW stations though.

The pot on the board shifts bias on a 1N4001 diode in series with the crystal, and gives it about 2.5kHz tuning range

I tried hooking the audio output of the receiver to my laptop to see if it would work with FLDigi.  No dice.  The ground loop between the computer and antenna brought up the 60 Hz hum and overwhelmed the sound card.  Even putting a 4SLink in line for isolation did not make enough of a difference.

I keyed it and measured about 0.5W from a 9v battery, not too bad.

More observations to follow.

73 Dave NM0S


Re: This morning's Thursday morning net

W0IIT
 

Wayne,

Way to go my friend!!!!! A very good radio tale of victory!!! Nice picture with the story —— it should end up “Somewhere”:-)

cu es 72, Bart W0IIT
Pittsburg, KS
4Sqrp=#72, FP=#11, ARS=#568,
SKCC=1139, NAQCC=#588 FIST=#5819,
Zombie=#500, Geratol=#1000


NAQCC Sprint Wednesday Night

Larry Makoski <w2lj@...>
 

The July sprint is this coming Wednesday evening local time (July 15th,
EDT - 8:30-10:30PM, CDT - 7:30-9:30PM, MDT - 6:30-8:30PM, PDT - 5:30-7:30PM),
which translates as Thursday, July 16th, 0030 to 0230Z in all cases.

For all the "official" information, please go to:

http://naqcc.info/sprint201507.html

There you will find all the details as to time, frequencies and other important
information.

Certificates: SWA (simple wire antennas) certificates by call area, VE and DX
for 1st, 2nd and 3rd place finishers (New!). A Certificate for top score in the
GAIN antenna category.

Prizes: Too many to list!! - check out the prizes page on our website.

This is a monthly event that caters to the CW veteran, the CW newcomer, straight
key and bug fans. All are welcome to participate (this includes QRO); but you
must use QRP power levels to compete for awards.

If you've been hesitant to join in our sprints because you hear other sprints
running at breakneck speeds, have no fear. Our sprints are geared to the
newcomer to CW and/or contesting. Virtually everyone including the many veteran
contesters who regularly enter our sprints will slow down to YOUR speed to help
you make your contacts.

If you are not already a member of NAQCC... membership is FREE! Now is your
chance to join the largest QRP CW Club in the world!! We currently have 7100+
members in: All 50 States - 9 VE Provinces - 100 Countries. Sign up on the
NAQCC website today (http://naqcc.info/) and receive a handsome certificate,
with your membership number on it, which is good for life.

Come join us and have a real good time!

72/73 de Larry W2LJ
NAQCC #35

for NAQCC
http://naqcc.info/


SSS coming up

John Lonigro
 

Don't forget (like I almost did)! The Second Sunday Sprint is this Sunday, from 7:00 - 9:00 pm CDT. We need lots of activity, to make up for the poor showing last month due to the weather. Let's hope the thunderstorms stay away for a few days this month.

72,

John AA0VE
4SQRP Contest Coordinator


Re: 60 mtr rig RM][-60

Chuck Carpenter
 

Converting an RM][-80 to an RM][=60 is on my to-do list. There are some things to consider.

The main consideration in addition to frquency accuracy and stabiltiy and the offset frequency. The offset in the as-designed RMs is not very accurate. RM offset is accomplished with a simple FSK circuit. The offset is intended to be around 600-700 Hz but it rarely is.

Here in the UK, The G-QRP club and Kanga offer crystals for 5MHz. I know that some of our frequencies are the same as US ones.
The crystal frequencies available from Kanga UK are 5373 and 5405.

Failing that, a simple DDS or Si5351 even could provide the correct frequency cheaply and with good stability.
I tried that with a simple DDS vfo. There wasn't enough output so a buffer/amplifier would be needed. But the simple version doesn't have offset capability.

The Arduino or Raspberry, as suggested by Don, would probably be better as the needed offset for the RMs (and other TXs) can be program controlled. They may also need an output amplifier/buffer but that's easily done.

A 5MHz RockMite or 5MHz Kanga FOXX3 (Pixie) would be easy to get going.
Well, maybe not. Specifications for frequency accuracy is plus or minus 50 Hz. This according to International Radio Regulations, although it is not actually specified by the FCC regulations. But, I'd think it needs to be as good any of the modern main stream transceivers on the market.

Getting an RM to have both accurate transmit and offset frequency would required major modifications. I've done this with two rigs on 80 and 30 meters for setting the offset but not for adjusting the oscillator to a precise frequency. With parallel resonant crystals, the RM oscillator frequency is typically 1 to 2 kHz below the marked frequency. With series crystals, just the opposite.

It is possible (I think) to use two variable capacitors in series with the crystal. One to adjust the key-down transmit frequency and the other switched in and out via Q2 for the offset (push button sense too).

Frequency stability may be adequate if the transmitter temperature is controlled. More elaborate schemes may be required.

By this time, it may seem that all the rework is going to cost more than the kit dig... ;-)

If transmit offset is not considered then th receiver needs to accomodate the offset.

Anyway, could be a fun project just to find out what's what!



73, Colin M1BUU



Chuck Carpenter, W5USJ
EM22cv, Rains Co. TX


Re: 60 mtr rig

Colin Evans
 

Curt,

60m is very popular with SOTA ops for NVIS mode contacts.

Here in the UK, The G-QRP club and Kanga offer crystals for 5MHz. I know that some of our frequencies are the same as US ones.

Failing that, a simple DDS or Si5351 even could provide the correct frequency cheaply and with good stability.

A 5MHz RockMite or 5MHz Kanga FOXX3 (Pixie) would be easy to get going.

73, Colin M1BUU


Re: 60 mtr rig

Don Wilhelm <w3fpr@...>
 

Add a mixer - and rather than crystals, use a DDS controlled by a Raspberry Pi.
The RF section from the mixer to the final output is no more difficult than for more simple rigs.  60 meters and 40 meters in the same rig is possible with a low pass filter having a cutoff frequency of 8 to 9 MHz - so the dual band operation is simply a matter of programming.
Add a relay to the LPF to bring the cutoff down to the 6 MHz region and 80 meters could be easily added.
With the mixer already included, it is conceivable to expand it to SSB and DATA mode use as well with just the addition on a balanced modulator and some audio input circuits.

73,
Don W3FPR

On 7/10/2015 8:38 AM, wb8yyy@... [4sqrp] wrote:
 

Interesting idea -- but it has its challenge -- I can't imagine that an appropriate xtal exists, that precisely matches one of the allocated 'channels' in this band, if indeed one can be found to even fall into this band. 

I think I see where you are going -- it might provide some useful propagation when 40m is 'too long.' 



Chinese Pixie Part II

ai9e_qrp@...
 

I finally got back to the workshop last night and built the Chinese Pixie I'd bought a couple months ago.  Here are my observations:


1.  The parts supplied did not match the schematic.  Too many 0.01u caps, not enough 0.1u caps, and three left overs.


2.  The holes for capacitor leads were on 0.2" centers, while the parts supplied were mini disks with 0.1" spacing.


3.  No thermal reliefs on grounded pads - took a lot of heat to solder into the ground plane.


4.  Aside from the caps, all the axial components were installed 'hairpin' style.


5.  No toroids - all inductors were molded axial type.


6.  There were extra holes for the DC input and RF output connectors so the builder could hard wire to a connector off-board if desired - a nice touch!


7.  All traces were heavy, at least 0.02" so very little risk of lifting or burning a trace.


I'll be firing it up and putting it on a scope this weekend.  Stay tuned.


73 Dave NM0S


Re: 60 mtr rig

Curt
 

Interesting idea -- but it has its challenge -- I can't imagine that an appropriate xtal exists, that precisely matches one of the allocated 'channels' in this band, if indeed one can be found to even fall into this band. 

I think I see where you are going -- it might provide some useful propagation when 40m is 'too long.' 

Reminds me I need to update firmware on my appliance rig -- so I can do 60m CW .....

As long as this allocation remains channelized, it seems to me to be less viable for home constructed QRP rigs.  Maybe builders could align the oscillator to required accuracy (I guess I need to read what this is). 

Hard to say how many rigs would be sold for 60m.  Honestly, everyone who wishes to operate a simple home constructed rig should consider having something for 80m -- its less crowded than 40m - and works fine when the QRN is not high.  I really think this is a better solution than 60m for casual communication. 

73 Curt


60 mtr rig

Robert
 

How about a  single frequency rig for 60 meters? I wonder if a pig rig v2 could be built for 60 meters


Net Chekins

WA0ITP
 

My ISP is acting up again today (Mediacom, the company we love to hate). So this is the second try, hope it gets thru.

I lumped last nights and this morning's checkins into one email so as to increase participation :o)  Many thanks to those who made it in, I hope to hear you agn next week.  Wayne, I just saw your /P post, next week I'll respond to you first so you can get back to the daily grind a happier man :o)   OOPS I just noticed that I didn't sort the list first to last. I also noticed that Chas was misidentified as David, wonder how that happened.   Shucks, I'll try to do better next time.

-- 
72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@...


Re: This morning's Thursday morning net

WA0ITP
 

Yea!!  Way to make the workday better!  Good to hear you and your sig was indeed and S5 - on the -meter.
|
Congrats
72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@...
On 7/9/2015 10:12 AM, Wayne Dillon wayne.dillon@... [4sqrp] wrote:


​G'day all,
First let me say... YEAH, YESSS, WHOO HOOO, yep I made it into the net. So what you say, well the conditions were less than good, less than average actually, let me explain:
I'm at work and my morning break coincides with the net start time. So, when I got to work this morning I set everything up, ready for an 8 am attempt. The break bell rang and I went into action, switched on, listened and there was WQ5RP, KK5IB made it in ahead of me so I hung on (time was getting short) and on the second go I made it in, whoo hoo !!!. Oh, did I mention it was from my car with a "Firestick" type antenna on the roof and the FT817 on the passenger seat. The antenna is fed via an Elecraft T1 (best auto tuner I've ever met) so at 5 watts into this less than efficient set-up I garnered a 559 from net control. Thank you. Kinda made my morning (even my boss noticed my improved demeanor!)
72/3 all es God Bless de Wayne - KC0PMH



--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 
Membership Chairman - 4SQRP Group
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155T
CW Ragchewers Anonymous #40
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.6037 / Virus Database: 4365/10193 - Release Date: 07/09/15



Re: This morning's Thursday morning net

dekle <dekle@...>
 


I can feel the joy all the way down here Wayne.
 
73
Bill
KV6Z
 
 

----- Original Message -----
Sent: Thursday, July 09, 2015 10:12 AM
Subject: [4sqrp] This morning's Thursday morning net

 


​G'day all,
First let me say... YEAH, YESSS, WHOO HOOO, yep I made it into the net. So what you say, well the conditions were less than good, less than average actually, let me explain:
I'm at work and my morning break coincides with the net start time. So, when I got to work this morning I set everything up, ready for an 8 am attempt. The break bell rang and I went into action, switched on, listened and there was WQ5RP, KK5IB made it in ahead of me so I hung on (time was getting short) and on the second go I made it in, whoo hoo !!!. Oh, did I mention it was from my car with a "Firestick" type antenna on the roof and the FT817 on the passenger seat. The antenna is fed via an Elecraft T1 (best auto tuner I've ever met) so at 5 watts into this less than efficient set-up I garnered a 559 from net control. Thank you. Kinda made my morning (even my boss noticed my improved demeanor!)
72/3 all es God Bless de Wayne - KC0PMH



--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 
Membership Chairman - 4SQRP Group
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155T
CW Ragchewers Anonymous #40
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686


Re: Wednesday night 40m Net

Malachi Doane
 

Hey Bill, 

 Yes that was me but I figured it was so bad due to QRM on this side to not try more than twice! 

 
  Thanks for the net as always and to the other stations, 4SQRP is a fun net. 

  Best 72/3 N2QFD :: Mal


Re: This morning's Thursday morning net

Johnny AC0BQ
 

Congrats Wayne!
Nice /m setup
73
Johnny AC0BQ


On Thursday, July 9, 2015, Wayne Dillon wayne.dillon@... [4sqrp] <4sqrp@...> wrote:
 


​G'day all,
First let me say... YEAH, YESSS, WHOO HOOO, yep I made it into the net. So what you say, well the conditions were less than good, less than average actually, let me explain:
I'm at work and my morning break coincides with the net start time. So, when I got to work this morning I set everything up, ready for an 8 am attempt. The break bell rang and I went into action, switched on, listened and there was WQ5RP, KK5IB made it in ahead of me so I hung on (time was getting short) and on the second go I made it in, whoo hoo !!!. Oh, did I mention it was from my car with a "Firestick" type antenna on the roof and the FT817 on the passenger seat. The antenna is fed via an Elecraft T1 (best auto tuner I've ever met) so at 5 watts into this less than efficient set-up I garnered a 559 from net control. Thank you. Kinda made my morning (even my boss noticed my improved demeanor!)
72/3 all es God Bless de Wayne - KC0PMH



--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 
Membership Chairman - 4SQRP Group
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155T
CW Ragchewers Anonymous #40
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686



--
QRP....."More smiles per Watt"
72
JOHNNY AC0BQ  ..




This morning's Thursday morning net

Wayne Dillon
 


​G'day all,
First let me say... YEAH, YESSS, WHOO HOOO, yep I made it into the net. So what you say, well the conditions were less than good, less than average actually, let me explain:
I'm at work and my morning break coincides with the net start time. So, when I got to work this morning I set everything up, ready for an 8 am attempt. The break bell rang and I went into action, switched on, listened and there was WQ5RP, KK5IB made it in ahead of me so I hung on (time was getting short) and on the second go I made it in, whoo hoo !!!. Oh, did I mention it was from my car with a "Firestick" type antenna on the roof and the FT817 on the passenger seat. The antenna is fed via an Elecraft T1 (best auto tuner I've ever met) so at 5 watts into this less than efficient set-up I garnered a 559 from net control. Thank you. Kinda made my morning (even my boss noticed my improved demeanor!)
72/3 all es God Bless de Wayne - KC0PMH



--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 
Membership Chairman - 4SQRP Group
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155T
CW Ragchewers Anonymous #40
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686


somebody here needs this

Chris Howard w0ep
 

government surplus auction (big log periodic antenna, tower and base rotator)

http://gsaauctions.gov/gsaauctions/aucindx/?sl=91QSCI15197901


Wednesday night 40m Net

dekle@...
 

Good net tonight.
One was "iffy".
Let me know if I have made an error in the log.

Here is the QNI list:

KK5IB          Darryl     Jonesboro, AR
WA9PWP    Paul       Stoughton, WI
N0NBD        Paul        Humbolt, KS
W2SH         Chas       Millington, NJ
KD0WF       Jim         Columbia, MO
N2QFD        Mal         Elmira, NY  (very weak - this is just a guess)
KV6Z           Bill         Claremore, OK (NCS)


thanks everybody
73
Bill
KV6Z



Wed. night PSK checkins.

Dick Hammond
 

KA0KRN  David, Ottumwa, IA.
WF2F  Richard, South Bend,  IN.
AC0WZ Dan, Fulton, MO.
tnx to all for checkins, c/u next week.
N0TGR Dick, Augusta, KS.  NCS


RMRc cw practice net

Dale Putnam
 



 

The Rocky Mountain Region and Continental cw practice net will be called
 Today.. when you check in, I'll let you know my temp, your rst, and if you can copy any others, and want to say Hi to them,
please let me know. I will let you two chat for a couple exchanges, after we check in folks. Swap any numbers.. or QTH info.
 Tuesday/Thursday at 4:00 PM MDT, which is Tuesday/Thursday 22
2200 UTC, on 7062.5 kHzTuesday/Thursday at 4:30 PM MDT, which is Tuesday/Thursday 2230 UTC, on 14062.5 kHz.

Have a great day,
 

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