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Member postings for Danny M2Z

Here is a list of all the postings Danny M2Z has made in our forums. Click on a thread name to jump to the thread.

Thread: 'Intelligent' Battery Chargers
30/01/2018 00:00:18
Posted by peak4 on 29/01/2018 22:43:43:
Posted by Neil Wyatt on 29/01/2018 19:22:35:

And another thing...

If you want to charge other than high-capacity lead acidf batteries, the best solution is an iMax B6.

There are lots of 'clones' about and I suspect mine is one, but if you have the patience to run two 5-cycle conditioning runs it can recover most of the capacity in >15 year old NIMH pack and do almost as well for Nicads.

It also does LiONs and a great job of charging my 7Ah gel batteries.

Sadly, this means my home-built 'multicharger' is now being looked at as a potential source of parts


Unfortunately I doesn't go up to 19.2v, which is what I need to try and recover my Sealey impact gun battery.

I'm guessing the best approach will be to open the case and treat it as a 12v + 7.2v in series and cycle it in two parts.


I agree with Neil. I also use an Imax B6AC Pro, it handles my 5000mA 6S LiPo packs easily (nominally 22.2V) so your 19.2V battery should fit within the specifications.

The fact that it can balance charge/discharge/storage charge these packs is important to me, as well as charging/cycling my lead acid and LiFePo batteries.

Here is a link to the manufacturer's specifications **LINK**

* Danny M *

Thread: Ten Useful Things
22/01/2018 04:57:25
Posted by lug lord on 21/01/2018 22:39:17:
Posted by Neil Wyatt on 16/01/2018 09:37:08:
Posted by Mick B1 on 15/01/2018 22:59:08:

Solder sucker.

Or does the 'rework gun' do that?

Or don't you make mistakes? devillaugh

Edited By Mick B1 on 15/01/2018 22:59:56

Solder sucker in at number 10 and we lose the mini-clip leads

Lol, but you require a solder sucker with an all metal body (hopefully grounded) as the plastic ones could make an impressive electrostatic spike as the plunger retracted. They were also banned from my workplace for this reason

(I was working to MilSpec so every precaution was taken regarding reliability of the assembly)

* Danny M *

20/01/2018 04:17:01

Neil, I was being taught to teach to MilSpec standards, the standards came from NASA, they were high. For the teachers they were a bit higher.

A heat shunt was mandatory on many components. Omit it and get the dreaded F on the course report. Many components were actually soldered in an I/R oven. The name of the game was High Reliabilty Soldering so every precaution was taken to assure as near perfect a result as humanly possible.

If you were on an Apollo moon mission then a dry joint could really ruin your day!

So how many people used to use 'stand-offs' under their transistors? I just did a search and no response so looks like a photo session in the workshop. I must be showing my age as latest job is a Marshall Valve amp for a muso mate.

* Danny M *

19/01/2018 03:25:45
Posted by StephenS on 18/01/2018 22:15:57:
Posted by Danny M2Z on 18/01/2018 10:53:05:

The Weller type soldering guns were banned from my workplace due to the ESD (electrostatic discharge) capability to damage sensitive CMOS devices,as also was solder wicking braid (it could damage pcb tracks).

Given all that, they are quite adequate for home handyman use if used with care.


I presume you are referring to the soldering guns where the wire tip is part of a transformer secondary, or are you meaning the Weller magnastat irons that use the Curie point principle for temperature control ?

Stephen, I am not sure what type of switching was used for the Weller soldering guns that we were prohibited from using, it was quite a few years ago. All I remember is that they had a pistol grip ,and offered 'instant heat'. I also do not remember any type of thermostatic control except the operator's trigger finger.

They were quite handy for soldering up fuel tanks for my models though!

My Aussie Royel soldering station came with grounding sockets so that a ground clip may be attached to sensitive devices and I can see no reason that any tool cannot be connected to ground with a flying lead from there to the ground track of the pcb being worked on.

Oh yeah, for Neil's list add 'Thermal Shunts'

* Danny M *

18/01/2018 10:53:05

The Weller type soldering guns were banned from my workplace due to the ESD (electrostatic discharge) capability to damage sensitive CMOS devices,as also was solder wicking braid (it could damage pcb tracks).

Given all that, they are quite adequate for home handyman use if used with care.

Also, we used a carbide tipped shear nipper to cut component leads to minimise the shock travelling up the device leads. I can dig up a photo if anybody is interested as all tools used during my course were given to the students and so have been carefully preserved.

One other useful trick that I learned is to cut the component leads to length after insertion into the board and tin the cut end before making the main joint. The above mentioned carbide cutter was handy for this as it left a consistent length of lead (about 1.2mm) projecting above the track.

* Danny M *

18/01/2018 10:14:22

Well done.

Reminds me of this quote: "Never interrupt someone doing what you said couldn't be done." - Amelia Earhart

* Danny M *

Thread: Ten Useful Things
17/01/2018 08:09:54

Here's my rework station, it includes a vacuum pump and was locally made here in Vic, Australia.

I have another one coming along with a microscope and specialised tools for smd work.

Here is my favourite wire stripper, the cam precisely adjusts the jaw gap (so that no conductors are damaged), set the end stop (length of insulation to be stripped) and squeeze the handles. It is a real joy to use such tools.

* Danny M *

soldering station.jpg

utica stripwright.jpg

Edited By Danny M2Z on 17/01/2018 08:11:05

Thread: A memory test for the Electronics Wizards
08/01/2018 11:31:38

The use of a photosensor used to be a sneaky way to implement a light sensitive 'anti-handling device' on a mine or a bomb, they have been around for a while **LINK**

So they make it just that bit harder to defuse if one wants to live to tell the tale to the grandchildren.

* Danny M *

Thread: What did you do Today 2018
08/01/2018 10:53:20

When I went to school in a (posh) London Grammar School (Parmiter's, got a scholarship ) a slide rule was not only mandatory, it had to be a Faber Castel as we were given lessons on how to use them, not bad for a 12 year old to learn the basics.

Today I continued to strip a model aircraft of ancient tissue using neat acetone so definitely an outside job. Not so hot as yesterday, only reached 97° F so sat in the shade with gentle breeze on back, but I felt pity for the English Test Team as I listened to the cricket on the radio, the heat is hitting them hard. Just up the road from the SCG Penrith (outer Sydney) reached about 117° F yesterday.

At least it was not too humid but apparently many of the 'Barmy Army' went to Bondi Beach and turned into lobsters. This is not a good idea as skin cancer (melanoma) is prevalent under the southern sun **LINK** .

* Danny M *

Thread: Cutting oil -
04/01/2018 07:20:03

WD40 is as it name implies (Water Displacement #40) is not a lubricant, it is designed to get rid of water from wet metals. After that it does absolutely nothing except get sticky as the volatile constituents evaporate. It is handy for short term rust prevention and machining ali as previously mentioned.

In the bush I use something like this if nothing else is available, rendered pig fat (tallow) works pretty well although it does smell a bit. You can get some here **LINK** or hunt the pigs with a suitable calibre. I like a .444 Marlin with 12G O/U loaded with bb's as backup. Eating the rest of the pig is a bonus but cook it well as they carry parasites. Use a meat thermometer!

As you do not give a location you could be anywhere in the world so consider this as general advice!l

From reading your other thread though, it appears that you may have picked a difficult to thread lump of stainless steel wire so then I would just consider replacing with the correct bits as probably cheaper in the long run.

* Danny M *

Thread: What did you do Today 2018
02/01/2018 07:36:13
Posted by Neil Wyatt on 01/01/2018 14:38:31:

It's probably because the PRC want to know where people in China are flying them, not what you are doing.

My cheap phone came with thr Chinese filtered version of Google pre-loaded and Weibo etc...

Expect UK ones to require flight logging of larger drones in the future...


Hi Neil, it is more involved than that. **LINK**

If I want to fly in certain places then the equipment must be cyber-clean, it's in the contract.

* Danny M *

01/01/2018 08:28:50

Kids gave me a dji mavic pro multirotor for Xmas. It took all yesterday and today to discover how to activate it without logging in to dji China and bypass all the Chinese spyware that logs all flights and reports back home about every flight.

Wireshark reports that it tried to connect to 27 servers in China. Why would it want do this to a country that claim that they are our friends?

It's a nice toy but pretty sneaky so be careful if you fly one!

* Danny M *

Thread: cl 300 lathe problems
31/12/2017 23:46:33

G'day Ernie. While you have the apron off, this is a very worthwhile simple mod to make. It keeps swarf and crap from getting into the gearbox. I made the acrylic version (just because I had a few sheets of acrylic lying around).


* Danny M *

Thread: Sad but true!
30/12/2017 22:03:32

G'day. I saw this on another forum and i laughed so much that i thought it was worth sharing.

Please substitute whatever you want for "spark plug" and it still works! (Copied and pasted from Facebook}

This hits the nail on the head!

How many FaceBook group members does it take to change a spark plug?

1 to change the spark plug and to post that spark plug has been changed.
14 to share similar experiences of changing spark plugs and how the spark plug could have been changed differently.
7 to caution about the dangers of changing spark plugs.
27 to point out spelling/grammar errors in posts about changing spark plugs.
15 know-it-alls who claim *they* were in the industry, and that "spark plug" is an electrical device threaded into the cylinder of an internal-combustion engine to ignite the fuel mixture by producing timed sparks between electrodes.
2 to post that this group is not about spark plugs and to please take this discussion to a spark plug group.
27 to defend the posting to this group saying that we all use spark plugs and therefore the posts *are* relevant to this group.
16 to debate which method of changing spark plugs is superior, where to buy the best spark plugs, what brand of spark plugs work best for this technique, and what brands are faulty.
2 to post URL's where one can see examples of different spark plugs.
12 to post to the group that they will no longer post because they cannot handle the spark plug controversy.
4 to suggest that posters request the spark plugs FAQ.
16 to post "F".
44 to ask what is a "F"?
4 to say "didn't we go through this already a short time ago?"
3 to say "do a Google search on spark plugs before posting questions about spark plugs".
14 to post photos of spark plugs they own.
1 forum lurker to respond to the original post 6 months from now and start it all over again....

* Danny M *

Thread: Mega Battery
30/12/2017 11:18:03

Here is a linky to typical solar installation costs here in Australia, note the steady decline over the past few years **LINK**

* Danny M *

Thread: How quiet are silent generators?
27/12/2017 09:58:17

This one works quite well, it depends on how you load it up but it's nice and quiet and not to greedy on fuel **LINK**

You should be able to find one closer to home. I use one for when a storm takes out the power though never tried the microwave on it, it runs a few portable lights and the pc ok though.

Isolate it from the mains and run required devices through extension cords as one does not want a repair person hanging off the power lines being zapped by your generator. So be aware of safe practices when running a generator at home.

I don't even think of going to the workshop with no power, other priorities!

* Danny M *

Thread: Merry Christmas!
25/12/2017 03:53:40

While a lot of you get the cold and the snow, down-under the rest of us put up with the weather and 6" long yummy local Tiger prawns for Christmas lunch **LINK** (washed down with a few cold tinnies).

Anyway, to get you in the mood, here is an Aussie version of 'Jingle Bells' I hope that you enjoy! **LINK**

Keep safe everybody and have a really beaut holiday!

* Danny M *

Thread: How on earth do they calculate electricity and gas bills...
22/12/2017 08:24:01

The so called 'Smart Meter' is not so smart after all. Once it's computerised it is a prime candidate for a bit of fun **LINK**

My own meter (here in Oz) is not even encrypted and there are many threads on the net about how they work

* Danny M *

Thread: HMS Queen Elizabeth: Leak found on new aircraft carrier
22/12/2017 08:12:43

All that money yet something cheap and nasty like this, skillfully used, can cause a lot of damage as it did to HMS Sheffield. **LINK**

I was actually on a military exercise as the events unfolded so followed developments closely. At least you had a PM with the guts to act decisively!

If anything maritime is said to be 'survivable' in a full-on war scenario then maybe the modern nuclear powered submarine has a fighting chance.

Aircraft carrier's may be handy in limited conflicts where the opposition does not possess the technology to take them out, such as in the Persian Gulf but if the s**t hits the fan it's just another big fat juicy target!

I wonder what threat contingency to the U.K. this ship is actually designed to counter?

* Danny M *

Thread: A dongle dingle
20/12/2017 09:05:11
Posted by clivel on 20/12/2017 06:07:30:
Posted by Michael Gilligan on 18/12/2017 09:59:54:.

The dongle was [for its time] a sophisticated and 'uncrackable' device, to protect a high value product.

The dongle might have been 'uncrackable', but the software it protected was not. I am embarrassed to admit now, but for a brief period some years ago, I derived a certain amount of satisfaction using a disassembler and a debugger to patch software so that it could operate dongle free. Two of my notable cracks were Autocad and P-Cad a PCB design package. After having a few cracks under the belt, knowing what to look for, I could typically crack a package in an evening.
In mitigation, other than checking that the software was still fully functional, I never personally used any of the packages that I cracked.
As a side benefit, my knowledge of the x86 CPU and the IBM PC architecture was considerably improved and stood me in good stead for some years.


The local Autocad distributor was quite p*ssed off when I showed him how the 'uncrackable' dongle was circumvented by a a patch that returned the correct answer to the log-on query. Being written in assembler code it was quick. The reason why it was written was that our provided (parallal/printer port) 'dongle' obstructed the rear of the workstation and crashed the program if the system was pushed against the wall.

We had a licenced version of Autocad but just wanted to show the muppet that his claim of 'uncrackable' was pure wishful thinking and bulls*it.

So to help out our mate Sam I searched and eventually found the code. It's on a 5.5 " floppy disc so I had to hook up a drive to an old DOS box, the file is called dd.exe (dongle defeat) and it was assembled to run under MS Dos 3.3.

* Danny M *

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