Date   

Re: Power supply for clock kit #clock #supply

Dave Capstick
 

thanks for the suggestions everyone.  I've also had a suggestion for the Traco Power
ESP-18-05sn from Mike G8NXD.  That or the Jameco, or something similar look like good suggestions as well.
Thanks for the help

Dave


Re: Power supply for clock kit #clock #supply

Roger Hill
 

Hi Dave.


I used to get mine from Maplin 2.1 x 5.5mm plug, socket to match...but it really is up to you. Use what you prefer, or have handy.


Roger

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***************************
Roger Hill
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On 2019-02-06 09:07, Dave Capstick via Groups.Io wrote:

hi roger,
that sounds like a good suggestion. Do you have a link to a suitable converter from the RPi supply? - i have a few of those, so copuld make use of them to power the clock

Thanks

Dave


Re: Power supply for clock kit #clock #supply

Dave Capstick
 

hi roger,
that sounds like a good suggestion. Do you have a link to a suitable converter from the RPi supply? - i have a few of those, so copuld make use of them to power the clock

Thanks

Dave


Re: Power supply for clock kit #clock #supply

Nigel Dudley
 

Another idea is to power it from the shack power supply via a cheap 12v to 5v converter.  

I have mine permanently wired this way along with a sensor that shows the room temperature (T1). T2 shows the shack DC supply voltage (via a suitable divider network). Only using a two line display so I have the values alternating.

Despite being located between two pieces of equipment and away from the window the GPS module usually takes around a minute to lock after the supply is turned on and the green LED starts flashing.

 

Nigel, VK6NI

 

 

 


Re: QCX kit -- Use of IC Sockets

Alan Richmond
 

"but easing them out will always reveal the folded pin."

Not out, but up enough to see the problem. Take the chip out and you risk bending a pin when you reinsert it, creating the problem you were trying to cure. Insert a small screwdriver at the and of the chip to raise it a couple of mm (eighth of an inch in the USA) , then repeat at the other end.

Best regards

Alan
GU3ONJ


E & O E


Re: Should we have a QCX QSO Party? #qcx

Michael Sharp
 

I’m in as well, pending my work schedule. I’m still learning my Morse code, so this will be a good exercise =)


Re: Multi turn resisters 20K included with kit

Hans Summers
 

Hi Andrew
 

I am a little confused as to the modifications for 20K vs 50K pots.

The value of R14( which will be replaced with a 15K) is 10K.

Why would I need to swap R21 (7.5K) with R49(10K) when I am replacing the 10K at R14 with a 15K?

Wouldn’t I just move R14 to R21 and put a 15K in R14?


Yes, you are correct... you can do it that way. 

73 Hans G0UPL


QCX Enclosure update

Hans Summers
 

Hi all

All pending orders of QCX enclosure kits are cleared. 

Going forward, QRP Labs shop will not be stocking the QCX enclosure kit. 

You can still get the QCX enclosure kit from the designer/manufacturer BaMaTech's website. 

73 Hans G0UPL


Re: Should we have a QCX QSO Party? #qcx

John Overbaugh
 

I'm still learning CW, but I'm in if you're all patient with me lol...


On Tue, Feb 5, 2019, 14:14 Karl Schwab via Groups.Io <ktschwab=yahoo.com@groups.io> wrote:
This would be fun; I'm in too!  de KO8S


On Monday, February 4, 2019 6:46 PM, Chopper <bob@...> wrote:


Might be a good idea to do something similar to CWOPS weekly mini ( although not weekly) that operates early am, mid afternoon and late evening so that all band openings are covered. 



Re: QCX kit -- Use of IC Sockets

Bob Macklin <macklinbob@...>
 

I use Mil-Max sockets. They are more expensive but worth the price.

But there are no sockets for surface mount devices! To replace SMD ICs I cut
the pins and trash the chip. Then clean the pads to replace the device.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"

----- Original Message -----
From: "Ken Bell" <kn4dgr@...>
To: <QRPLabs@groups.io>
Cc: <kbell@...>
Sent: Tuesday, February 05, 2019 6:10 PM
Subject: Re: [QRPLabs] QCX kit -- Use of IC Sockets


"Hi Al,

I used sockets on mine, mainly because I had to cut out one of the chips
after a failure and didn't want to have to do that again!

I haven't noticed any extra noise etc. I think that Hans was concerned that
sockets could just introduce another potential source of bad connections…."


I’m with you on this one.

After cutting out a couple of chips, I saw the light. When I gave up and
built a second one, I went back with sockets for all the chips. Took a
minute longer and a couple of the placements were a little tight, but if I
need to change a chip, I can change a chip in a minute rather than 2 hours.

-ken


Re: QCX kit -- Use of IC Sockets

Ken Bell
 

"Hi Al,

I used sockets on mine, mainly because I had to cut out one of the chips after a failure and didn't want to have to do that again!

I haven't noticed any extra noise etc. I think that Hans was concerned that sockets could just introduce another potential source of bad connections…."


I’m with you on this one.

After cutting out a couple of chips, I saw the light. When I gave up and built a second one, I went back with sockets for all the chips. Took a minute longer and a couple of the placements were a little tight, but if I need to change a chip, I can change a chip in a minute rather than 2 hours.

-ken


Re: QCX kit -- Use of IC Sockets

Alan <g8lco1@...>
 

There is a failure mode with sockets that may be hard to find if you don’t know about it. It happens when you insert slightly bent pins into the socket. Instead of entering the female part of the socket the pin folds up underneath the IC  and rests on the contact . everything may  work normally then things stop working, you tap the board and it works again.

 

Looking sideways along the IC might reveal the folded pin(s) but easing them out will always reveal the folded pin.

 

 

73

Alan

G8LCO

 

 

 

_._,_._,_

 


Re: Replacement part for IC4 #fst3253

Wes AE6ZM
 

Pretty good price Jim, I paid 53.5 cents each, but $8 in shipping from Mouser. Course, I bought some other bits-n-bobs that were not available on the Parts Place. 

I need to get my browser bookmarks a little better organized so I don't need to rely on Google searches so much. The Parts Place did not appear during my search. And I had completely forgotten about it. This getting old stuff sure isn't for the faint-of-heart!!

> I finally got it all together...now I can't remember where I put it<

VY 73,
Wes

AE6ZM

Sierra Vista, AZ

 


Re: Should we have a QCX QSO Party? #qcx

Karl Schwab
 

This would be fun; I'm in too!  de KO8S


On Monday, February 4, 2019 6:46 PM, Chopper <bob@...> wrote:


Might be a good idea to do something similar to CWOPS weekly mini ( although not weekly) that operates early am, mid afternoon and late evening so that all band openings are covered. 



Re: Multi turn resisters 20K included with kit

ANDREW STEEN
 

Hello Hans.

I am a little confused as to the modifications for 20K vs 50K pots.

The value of R14( which will be replaced with a 15K) is 10K.

Why would I need to swap R21 (7.5K) with R49(10K) when I am replacing the 10K at R14 with a 15K?

Wouldn’t I just move R14 to R21 and put a 15K in R14?

Tnx.

Andrew

K6STN

 

From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of Hans Summers
Sent: Tuesday, February 5, 2019 8:00 AM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] Multi turn resisters 20K included with kit

 

Hi Andrew

 

It was a supplier error on a few kits about a year ago... see http://www.qrp-labs.com/qcx/qcxfaq.html#203 and let me know if you need me to send you two 50K resistors or if you want to do the modification. 

 

73 Hans G0UPL

 

On Tue, Feb 5, 2019 at 6:58 PM ANDREW STEEN <n2gff@...> wrote:

Good morning all, nice to join the group.

My question is in regards to the 2 multi turn resisters that are stated as 50K (503).

The two in my kit are labeled 203 (20K),

I have the 80M kit.

Is this a change?

I don’t want to install, as removal is a b**ch😊

Thanks,

Andrew

K6STN

 

Sent from Mail for Windows 10

 


Re: 2 x 20m WSPR/QRSS balloons launched back to back

Jim .....
 

I am relieved...new telemetry just in that shows 9580m altitude...this is good and about where it was predicted to be...and then some.
Also...Hans special telemetry software for balloons -


Re: Power supply for clock kit #clock #supply

ewsjts@...
 

Hi Dave,
I've been using TDK/Lambda supplies.  Small size, excellent regulation and low/no noise.  Mains voltage, 100 - 240 VAC. Around 18 dollars US from Newark (Farnell in your case I guess).  Model LS5-5 (5 VDC (adjustable) @ 5A)).
Ed.
WA4MZS 


Re: 2 x 20m WSPR/QRSS balloons launched back to back

Jim .....
 

2 spots in and it is indeed GN44 grid.
Sadly,altitudes are showing 6600m...but DFCW now showing what looks like 9200m or so.
Need more WSPR decodes.
Got a pretty good lock on both transmitters now on my grabber -
Will need some expert DFCW guys for these :)
https://www.qsl.net/n2nxz/hf1.jpg


Re: Replacement part for IC4 #fst3253

James Daldry W4JED
 

Hi, Wes

Found it on thepartsplace.k5nwa.com for 70 cents.

Jim W4JED

On 2/4/19 4:45 PM, Wes wrote:
Has anyone found a source for the SOIC footprint version of IC4, the FST3253? I have a unit on the bench with overheating of the 5v regulator, and it appears that IC4 is drawing excess current. Static measurement shows ~140 ohms VCC to ground. Everything else checks OK on the 5V bus. 
--
> I finally got it all together...now I can't remember where I put it<

VY 73,
Wes

AE6ZM

Sierra Vista, AZ

 


Re: Multi turn resisters 20K included with kit

Hans Summers
 

Hi Andrew

It was a supplier error on a few kits about a year ago... see http://www.qrp-labs.com/qcx/qcxfaq.html#203 and let me know if you need me to send you two 50K resistors or if you want to do the modification. 

73 Hans G0UPL


On Tue, Feb 5, 2019 at 6:58 PM ANDREW STEEN <n2gff@...> wrote:

Good morning all, nice to join the group.

My question is in regards to the 2 multi turn resisters that are stated as 50K (503).

The two in my kit are labeled 203 (20K),

I have the 80M kit.

Is this a change?

I don’t want to install, as removal is a b**ch😊

Thanks,

Andrew

K6STN

 

Sent from Mail for Windows 10