Re: ZL1RS balloon flight - BB04
I saw altitudes dropping and was hoping it collected moisture but would dry off and rise again...who knows...anything can happen with these things.
Would not be a first .
Optimism always high in this hobby :)
Jim
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Re: Difficulty winding and installing transformer T1
#qcx
I have not received my QCX yet but when I read the procedure for winding T1 my thought was why not wind each one separately?? I have built a lot of kits and wound a lot of toroids and that seems to em to be the best way to do it.
73, Bill NZ0T
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Hello John,
Whilst appreciating your good intent I see no purpose dividing places
to discuss QRP Labs products. I am a member of the Kenwood TS-590
group that spawned a second group, and that is in itself confusing,
but they are now arguing over turning just one over to Groups IO,
which would even further complicate things. I would prefer all info
remained here myself :) I would imagine the group has a fair few old
buffers like myself to whom modern social media like Facebook is a no
go area ;) Pubs are for chit chat, mano a mano :)
Sunday, January 14, 2018
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Trying to get a new FB group started. QRP-LABS Builders Group
John Mazzone N2EIK -- 2E0ILY Best regards, Chris mailto:chris@...
--
Best regards, Chris Wilson (2E0ILY)
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Taking another stab at getting my 80m QCX up and running
After much "wailing and gnashing of teeth" I decided to remove the transformer (T-1) and re-wind it. It seems like T-1 is the logical culprit for low receive gain and the inability to adjust C1 for a bandpass peak of more than 2.?
Just for fun I measured the inductance (after I removed it) of each pass with an Agilent U1733C. I went thru the calibration sequence before I took the measurements.
Primary 1: 0.65?H
Secondary 1: 0.34?H
Secondary 2: 0.34?H
Secondary 3: 24.13?H
I bold faced Primary 1 because it has 5 turns on it as does Secondary 1 and Secondary 2. Yet the primary has roughly twice the inductance as S1 and S2.?That doesn't make sense.?
I was not holding the toroid when I made each measurement. I triple checked that I connected correctly. Maybe I'll find something when I unwind all of the turns.?
--
73
NE5U
Mike
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Totally pointless in my opinion. Why? 73 Roger G4IUP
On 14 Jan 2018 14:58, "Keith, G6NHU" < nentecular@...> wrote: Personally I don’t think that’s useful.
73 Keith G6NHU
On 14 Jan 2018, at 14:29, John Mazzone < jmazzone@...> wrote:
Trying to get a new FB group started. QRP-LABS Builders Group
John Mazzone
N2EIK
On 1/14/2018 9:20 AM, John Mazzone
wrote:
Pin 19 has about 300ohms to ground. If I pull the IC the pad is
infinite to ground.
John Mazzone
N2EIK
On 1/13/2018 6:57 PM, John Mazzone
wrote:
Just got finished building the QCX 20 meter rig. rx was
perfect but low power on the output. somehow after removing
and replacing the filter torrids a few times now the rig just
stays keying. If straight key is selected then constant
keydown. if bug is selected then just? one continues string of
dits. Before I go tearing everything apart, does anyone have any
suggestions? Been there done that??
--
QSO365 - My amateur radio blog:?
?
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Personally I don’t think that’s useful.
73 Keith G6NHU
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On 14 Jan 2018, at 14:29, John Mazzone < jmazzone@...> wrote:
Trying to get a new FB group started. QRP-LABS Builders Group
John Mazzone
N2EIK
On 1/14/2018 9:20 AM, John Mazzone
wrote:
Pin 19 has about 300ohms to ground. If I pull the IC the pad is
infinite to ground.
John Mazzone
N2EIK
On 1/13/2018 6:57 PM, John Mazzone
wrote:
Just got finished building the QCX 20 meter rig. rx was
perfect but low power on the output. somehow after removing
and replacing the filter torrids a few times now the rig just
stays keying. If straight key is selected then constant
keydown. if bug is selected then just? one continues string of
dits. Before I go tearing everything apart, does anyone have any
suggestions? Been there done that??
-- QSO365 - My amateur radio blog:?
?
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What use it is to split the group?
None at all I think.
And why can I not reply to the annoncement, but have to start a new topic?
Jan
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Re: 20m QCX Serial #249 will not setup
Check solder connections on rotary encoder. I had same problem - no response to long press- found that I had forgotten to solder two pins.?
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Pin 19 has about 300ohms to ground. If I pull the IC the pad is
infinite to ground.
John Mazzone
N2EIK
On 1/13/2018 6:57 PM, John Mazzone
wrote:
toggle quoted message
Show quoted text
Just got finished building the QCX 20 meter rig. rx was perfect
but low power on the output. somehow after removing and
replacing the filter torrids a few times now the rig just stays
keying. If straight key is selected then constant keydown. if
bug is selected then just? one continues string of dits.
Before I go tearing everything apart, does anyone have any
suggestions? Been there done that??
|
Re: Difficulty winding and installing transformer T1
#qcx
It's definitely? a trial in self restraint, LOL.
The hand drawn diagram is great and lays it out very well but one
does need to be quite dexterous and patient. Hold the coffee until
you are done! LOL.
John Mazzone
N2EIK
On 1/14/2018 8:18 AM, jjpurdum via
Groups.Io wrote:
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You probably
could do it that way, but make sure you pay attention to the
phase of the windings, as that is important in the circuit.
Jack, W8TEE
I am new to building and having
an extremely difficult time winding and installing T1
for the 40 meter kit. This has been my first effort at
winding toroids. Between my eyesight and dexterity
it's not coming together by doing it one time with the
loops delineating the 5 turn windings. I have done it
and redone it a number of times. I find the hand drawn
diagram, by WA4MZS on page 50 very clear. Is there any
reason why I cannot/should not do the windings
separately following the wire winding pattern/sense in
the diagram? Thank you for your guidance.
Ron, AL7JR
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Re: Difficulty winding and installing transformer T1
#qcx
Yes do them separately, I did and it worked out fine.
Jess AE0CW Sent from my iPhone
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On Jan 14, 2018, at 3:08 AM, ron.klein@... wrote: I am new to building and having an extremely difficult time winding and installing T1 for the 40 meter kit. This has been my first effort at winding toroids. Between my eyesight and dexterity it's not coming together by doing it one time with the loops delineating the 5 turn windings. I have done it and redone it a number of times. I find the hand drawn diagram, by WA4MZS on page 50 very clear. Is there any reason why I cannot/should not do the windings separately following the wire winding pattern/sense in the diagram? Thank you for your guidance.
Ron, AL7JR
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Re: Difficulty winding and installing transformer T1
#qcx
? ? ? ? " ?Is there any reason why I cannot/should not do the windings separately following the wire winding pattern/sense in the diagram? Thank you for your guidance.Ron, AL7JR'
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QCX started buzzing all of a sudden after Q6 Change
Hi All,
Finally got around to change out the Q6 transistor, the initial one got toasted on initial setup. So now its an MPS751 as suggested. My qcx was from the initial batch.
Weird problem that just started happening is that when sending the sidetone seems replaced with just buzzing.... I know the sidetone itselves is fine because in practice mode its sounds just fine.
For Tx power it seems that it is putting about 1-2w output on 13v btw.
any help, tips or inputs greatly appreciated.
regards and 73,
Leo - PA1LDB
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Re: Difficulty winding and installing transformer T1
#qcx
You probably could do it that way, but make sure you pay attention to the phase of the windings, as that is important in the circuit.
Jack, W8TEE
From: "ron.klein@..." <ron.klein@...>
To: [email protected]
Sent: Sunday, January 14, 2018 5:55 AM
Subject: [QRPLabs] Difficulty winding and installing transformer T1 #qcx
I am new to building and having an extremely difficult time winding and installing T1 for the 40 meter kit. This has been my first effort at winding toroids. Between my eyesight and dexterity it's not coming together by doing it one time with the loops delineating the 5 turn windings. I have done it and redone it a number of times. I find the hand drawn diagram, by WA4MZS on page 50 very clear. Is there any reason why I cannot/should not do the windings separately following the wire winding pattern/sense in the diagram? Thank you for your guidance.
Ron, AL7JR
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Re: I need a QRSS Signal on 477,700 KHz +/_ 100 Hz to test my temporary 630M grabber
Dear Tim,
Thanks for the message and information that your working on getting a QRSS signal on 630 Meters.?? So far, your the only reply I have got.? I did tune another receiver down to the WSPR frequency and hooked it up to my probe antenna do copied some of the 630 Meter WSPR signals.? So It is working.?? Not sure how well yet but it is working.?? I did not receive any confirmed QRSS signals on the grabber so far.
Will await? your notice that your on the air.? After a couple of days testing, I will continue on with my building program to get these last bands active on the grabber.
Take care and have fun.? good luck on getting your QRSS signal on the air.
73 Dave WA5DJJ
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Re: New QCX build questions - Using the RX for a QRSS grabber.
Dear Keith,
The only cure for the drift problem that I see is using a GPS Stabilized 27 MHz Oscillator fed to the crystal terminals on the receiver board.?? A friend of mine is now building such a board that will take the 10MHz from my GPS stabilized 10MHz oscillator and create a 27MHz signal with 10 outputs to feed to 10 of the QCX receivers in my SUPER GRABBER.?? Then all of the receivers will not drift as their 27MHz Standard will not drift.?? I will post the details to this board when I get them from the guy that is building it.??
Take care and have fun.
73 Dave WA5DJJ
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Difficulty winding and installing transformer T1
#qcx
I am new to building and having an extremely difficult time winding and installing T1 for the 40 meter kit. This has been my first effort at winding toroids. Between my eyesight and dexterity it's not coming together by doing it one time with the loops delineating the 5 turn windings. I have done it and redone it a number of times. I find the hand drawn diagram, by WA4MZS on page 50 very clear. Is there any reason why I cannot/should not do the windings separately following the wire winding pattern/sense in the diagram? Thank you for your guidance.
Ron, AL7JR
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My QCX does the same thing. I found that I apparently sparked pin 19 (I think) of the micro controller. It is grounded internally and does that I have a new chip on the way.
Barry
NF1O
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Soldering one pin headers
Gm ? Blue-tack and a heated solder sucker are the two must important tools I have. ? Cheers ? Paul ? M0pnn ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of James Anderson
Sent: 14 January 2018 08:16
To: [email protected]
Subject: Re: [QRPLabs] Soldering one pin headers? Blue tack. It’s perfect for the job.? Once in position, it helps to hold the PCB steady once the board is turned over when soldering.? Easy to remove, cheap too. What more do you need.?
On 14 Jan 2018, at 01:34, J68HZ <bill@...> wrote:
I stick the one pin in a female header and solder it that way. ?Then pull the header off.? ? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: ? email:??bill@... ?
On Jan 13, 2018, at 2:01 PM, Steve Zabarnick <zabarnick@...> wrote:
What is the trick to soldering the one pin headers in the QCX kit? For multipin headers, I tack one end to hold the header in place, and then solder the other pins.
This doesn't work for single pin headers -- I can tack it, but it falls out when I subsequently do the final soldering. Any tips?
Steve N9SZ
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Re: Soldering one pin headers
Blue tack. It’s perfect for the job.?
It’s what I always use.?
Once in position, it helps to hold the PCB steady once the board is turned over when soldering.?
Easy to remove, cheap too. What more do you need.?
Keep it simple..!
All the best. James.?
On 14 Jan 2018, at 01:34, J68HZ < bill@...> wrote:
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I stick the one pin in a female header and solder it that way. ?Then pull the header off.?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
?
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
?
Owner – Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it:
email:??bill@...
?
On Jan 13, 2018, at 2:01 PM, Steve Zabarnick < zabarnick@...> wrote:
What is the trick to soldering the one pin headers in the QCX kit? For multipin headers, I tack one end to hold the header in place, and then solder the other pins.
This doesn't work for single pin headers -- I can tack it, but it falls out when I subsequently do the final soldering. Any tips?
Steve N9SZ
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Keith, G6NHU
Phil/K3UT
jjpurdum
barry NF1O