Date   

Re: Side cutters #tool

Ryan Flowers
 

Another vote for the Hakko. I bought a pair and then my wife thought I didn't, and ordered it for me! So now I have two pair. The second pair is unopened because the first one keeps going and going. I use it for all sorts of things. A great deal! https://amzn.to/2PTft3T

--
Ryan Flowers - W7RLF
MiscDotGeek.com
Multi Band BITX40 using QRP Labs Filters
The BITX40 FAQ


Re: QSX tcvr built-in Spectrum Analyzer

Qi Fan
 

Now I can't imagine how long will the wait time be for the second batch of orders.


Re: Side cutters #tool

turnsouth@...
 

Wow, thanks for all the advice, so many choices.

After reading the cautions, I wonder if it is the leads from transistors that play havoc on cutters. After a series of LED Christmas tress I built in a row this year for the XYL, I noticed they seem to be a hard steel compared to resistors and the rest.


Pictures in operation [was Re: [QRPLabs] Side cutters] #pics

KB3USG
 

On 2018-12-13 18:58-0000, m5fra2 via Groups.Io wrote:
See http://www.m5fra.org.uk/home-construction/qcx-transceiver-build/
So, I'm having issues with mine (and I'm a bit of a newbie) and one of
the things I wondered about was my decoder detecting I's, E's, H's and I
didn't know whether this was normal.

Looks as if it _is_ normal.

Thanks for publishing the picutures!

Paul
KB3USG


QCX Antenna Analyser feasibility #firmware #qcx

Pedro Henrique Kopper
 

Hello,
I was wondering how feasible it would be to implement a crude antenna analyzer in the QCX transceiver. It already has a SI5351 onboard and an exposed RF input, so it should be mostly a matter of implementing sweep functionality to the signal generator and attaching the transceiver to a resistive bridge, feeding it's output back to the RF input port.

Thanks,
Pedro


Re: Side cutters #tool

Les G3VYZ
 

I also have G8ARF :-)

I have two pairs of side cutters from RS (548-164) which have an attachment that stops the
wire offcut from flying across the room. They are over forty years old, still going strong and
are still sold by RS.


Re: #wspr U3S for 2m WSPR: How to remove the frequency-swing at start of transmission #wspr

M0RON
 

Thanks for that Hans, 
My other two u3s both have park set to 2 and 15000000 so I just set this one the same when doing initial set up.
If I set to park mode 3 this turns park mode off between transmissions if I read it correctly. I'll try it and see. I have two u3s with the OCXO kit fitted so if it works I'll switch it off on both OCXO kits.
Andy
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.


Re: Shack clock contrast adjustment

KI7MWA
 

....And NOW...like Ken, I am answering my own question: having MISread the construction manual, I supposed that "no connection" was one of the intended options when, in fact, THE ONLY TWO OPTIONS specified by the manual are jumper and 220k.  It is right there on page 6..."Install one of the two choices:"


Re: Side cutters #tool

juggie@...
 

Still using a pair of Lindstrom needle nose pliers that I was given 45 years ago here, still very nice to use too. I’d be using the cutters that I was given at the same time if my xyl hadn’t sniffled them and cut florists wire with them - solved that problem though, divorced her !!

73s all, Nick


Re: Side cutters #tool

m5fra2@...
 

I also have G8FRA!

 

From: QRPLabs@groups.io <QRPLabs@groups.io> On Behalf Of Frank W1FRA
Sent: 13 December 2018 19:50
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] Side cutters #tool

 

Nice callsign !  M5FRA !

 

Frank  W1FRA

 

On Thu, Dec 13, 2018 at 2:09 PM Mike W <mike@...> wrote:

Toffee hammer and 1/8" wood chisel, best cut ever. Bit of a pain grinding the
nicks out of the blade though <vbg>

On 13 Dec 2018 at 15:46, Pedro Henrique Kopper wrote:

> I've been using nail trimmers for a long time and they work great





Re: Shack clock contrast adjustment

KI7MWA
 

Sorry, wrong numerator...should be maximum 1.56 volts.


Re: Shack clock contrast adjustment

KI7MWA
 

If I am reading the schematic correctly, the three options (no connection/jumper/resistor) produce three different results:  with no connection (meaning neither R4 nor a jumper is installed), the contrast control pot is connected to ground, therefore Vcon is connected to ground (through more or less resistance), and the pot does nothing at all; with the jumper, the contrast control pot provides a variable voltage to the Vcon pin between 0 and +5 volts; with a resistor installed, the contrast control pot is one element of a voltage divider, therefore providing Vcon a voltage of between 0 and a maximum determined by the ratio of the maximum resistance of the pot to the sum of that resistance plus the resistance of R4 - in the case of R4= 220k, the maximum would be 5V * (100/(100+220)) = 3.44 volts.

In my experience, with no connection, the LCD demonstrates two states: no contrast (with the contrast control pot fully clockwise I can see characters in the blocks of dots if I look at the LCD from the side, but not if I am looking straight on), and blank (with even a slight shift of the pot, neither characters nor blocks of dots are visible).  


Re: Side cutters #tool

 

Nice callsign !  M5FRA !

Frank  W1FRA

On Thu, Dec 13, 2018 at 2:09 PM Mike W <mike@...> wrote:
Toffee hammer and 1/8" wood chisel, best cut ever. Bit of a pain grinding the
nicks out of the blade though <vbg>

On 13 Dec 2018 at 15:46, Pedro Henrique Kopper wrote:

> I've been using nail trimmers for a long time and they work great.






Re: #qcx #problem Radio newbie and QCX large audio hum... #qcx #problem

N3MNT
 

Since you said that you used a little too much heat on the audio pot, it is possible that you overheated the cap C1 as that is more delicate than the large pot.


Re: #qcx #problem Radio newbie and QCX large audio hum... #qcx #problem

Dave Redfearn
 

Paul,
When you are describing "peaking the BPF", do you mean the receiver alignment where you adjust C1, R27, R17, & R24 or are you troubleshooting low transmit output power by adding/removing turns from the low pass filter coils?

For the receiver alignment where you adjust C1, R27, R17, & R24 (8. Alignment Menu), you need to follow the instructions in the manual and not have anything connected to antenna jack.

From the Rev 3 manual: 
"In summary: the alignment tools built into the radio consist of a signal generator which injects a signal into the RF front end, and digital signal processing which adds a 250-Hz digital filter to the existing 200Hz analogue filter, and calculates the amplitude of the signal detected in that bandwidth. During alignment, the amplitude is displayed on-screen as an intuitive bar across the bottom row of the display. Using a screwdriver, you adjust the trimmer component in order to maximise or minimise the displayed amplitude.
Unplug the antenna during alignment of the radio!"

Also, since the QCX has no built-in protection for the finals, you do not want to transmit into the Loop antenna unless it has been resonated on the frequency you are using (or any other antenna for that matter).
A safe way to do this would be to use a resistive VSWR bridge in-line which can provide a 50 ohm load to the transmitter while the antenna is being tuned.
Here is an example of a resistive SWR bridge kit: https://www.qrpkits.com/swrind_case.html and an example of this type of circuit included in an antenna tuner: https://qrpguys.com/multi-tuner

73 - Dave, N4ELM
 




Re: Side cutters #tool

Mike
 

Toffee hammer and 1/8" wood chisel, best cut ever. Bit of a pain grinding the
nicks out of the blade though <vbg>

On 13 Dec 2018 at 15:46, Pedro Henrique Kopper wrote:

I've been using nail trimmers for a long time and they work great.


Re: #wspr U3S for 2m WSPR: How to remove the frequency-swing at start of transmission #wspr

Hans Summers
 

Hi Andy

FYI the "Park" feature shouldn't make much difference when you are using the OCXO or any other reference oscillator which is isolated from the Si5351A chip. Because temperature variations inside the Si5351A chip die can't affect the oscillator components.

73 Hans G0UPL 

On Thu, Dec 13, 2018, 19:34 M0RON <eustace.andy@... wrote:
Spent some hours today setting up the OCXO, from cold it draws about 0.2A rising rapidly to 0.5A before falling steadily settling around 0.3A. Gps correction at calibration cycle is negligible, signal looks very clean in WSJT-X and Argo, with absolutely no swing at start of transmission in wspr. Looking promising. Park mode 2 at 150,000,000. Calibration 001 060.
Andy
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.


Re: Side cutters #tool

m5fra2@...
 

Without doubt it has to be Lindstrom. First pair lasted 35+ years. Have side cutters and their perfectly flush cutters which are ideal for trimming wires on PCBs See http://www.m5fra.org.uk/home-construction/qcx-transceiver-build/  Yellow handled pair are side cutter, while handles are flush cutters.

 

Colin – M5FRA

 

From: QRPLabs@groups.io <QRPLabs@groups.io> On Behalf Of turnsouth via Groups.Io
Sent: 13 December 2018 01:09
To: QRPLabs@groups.io
Subject: [QRPLabs] Side cutters #tool

 

Have my 40m QCX ordered and am waiting (somewhat) patiently for the status to switch from "complete" to "shipped", but in the mean time I want to ask a tool question from other builders.

What is your favorite brand / type of side cutters for trimming leads after soldering?

I usually just pick up a decent pair of 4-5 inch ones with a small head. They work well for a while, but after a few projects the blades end up getting notched near the tip from all the trimming making them more difficult to use, and in need of replacement. Just wondering if anyone has any recommendations for a good long lasting pair of side cutters.

Thanks
Paul


Re: Side cutters #tool

Graham, VE3GTC
 

Knipex also makes very good quality tools, I have handful of their tools.

this is one of my favourites:

https://www.knipex.com/index.php?id=1216&L=1&page=art_detail&parentID=1367&groupID=1467&artID=2172

and for stripping the insulation off of magnet wire you can struggle
along with your pen knife, exacto knife, or sandpaper if you like but
you will never regret something this:

https://www.knipex.com/index.php?id=1216&L=1&page=group_detail&parentID=1363&groupID=1390

I find it so useful I have two.

cheeapest place I have found for the later is:

https://www.ebay.ca/itm/Knipex-1511120-Coated-Wire-Stripping-Tweezers-4-1-2-In/141959591547


cheers, Graham ve3gtc

On 12/13/2018, "geoffrey pike via Groups.Io"
<gi0gdp=yahoo.co.uk@groups.io> wrote:

I once (in my twenties) bought a pair of expensive leather shoes and they must have lasted 10 years or more, a few years ago  i bought a pair of Lindstrom side cutters and well i think they will last like the shoes, don't cut anything more than resistor/cap leads though!cheersGeoffGI0GDP On Thursday, 13 December 2018, 12:02:41 GMT, Alan de G1FXB via Groups.Io <g1fxb=yahoo.co.uk@groups.io> wrote:


Not cheap, but a Lindstrom side cutter nearly 40 years old

Used to cut not as a substitute for a pair of pliers........




Alan

On 13/12/2018 09:32, Mike Bowthorpe wrote:


Hi Paul

You do get what you pay for - I prefer Lindstrom. 

Get one for Christmas?

73
Mike
G0CVZ





Re: Side cutters #tool

Pedro Henrique Kopper
 

I've been using nail trimmers for a long time and they work great.


On Thu, Dec 13, 2018 at 3:22 PM Frank W1FRA <allenfr@...> wrote:
I respectively disagree with the usage. They have been pliers, wrenches, levers, screwdrivers and wonderfull side cutters. And mine are still cutting well! 

Frank   W1FRA

On Thu, Dec 13, 2018 at 12:15 PM mike <w1mt.qrp@...> wrote:
Lindstrom. I found some at a second hand electronics store in Winter Park, FL years ago. Bought several and still have them. The best!



--
Att Pedro H. Kopper