Відео

@@colincolin30 Hi Colin …noticed you do some work on the Vampire at the museum. Cool stuff! I visited with my cousin months ago …. Made me nostalgic about my short stint at sea …. Not in the military but merchant marine. Saw the shack from outside. I guess they decommissioned the original-big HF transmitters ? Anyway hope to QSO agn …. Maybe from the ship? 73 de VK2AOE.

Yep all part of the "fun" :) Making hay while the school holiday sun shines de VK@AOE

Not sure? I’m running Thetis. I’ve never used gnu radio but it looks fascinating….. my problem is there is so much to learn and master!!!…. Do I play with gnu… or design PCB’s on KICAD … etc etc. 73 de VK2AOE

Thanks for the comment. I worked him briefly the other day on 40m CW. Still an active ham. A true and modest gentleman. I have thus far built his miser linear DC shack PSU (used 2 rewound microwave transformers in series ). Also have built a SMPS filter and his field strength meter and part of his little mate transceiver (rcv section). I agree thoroughly, his designs are tried and tested.73 de VK2AOE.

Great idea....I did one for 2m and 70cm so might give that a crack. 73 de VK2AOE

We have 10m but not 27megs…. It went into 27 (11m band?) first boot up ?? Now it is behaving itself after factory reset and reload of firmware. Worked CW last night Sydney to Adelaide 1000 km plus and very nice receive on 40m (signal RST 579). 73 and thanks for the comment. As for buying rigs…. I buy kits and have avoided the BIG shiny expensive rig in favour of buying boat anchors, kits, parts and test gear…. To “save” money 😂😂😂😂😂 …

11m used to be a ham band once upon a time….it still is according to my FT101B where _B is for Boat anchor_

@@MidlifeRenaissanceMan he he he…. How you been?? I have been building and nerding it hard…. Alas domestic realities have been ruining my commitment to ham and poor personal hygiene 😝😝. About to start the QRP linear amp now 73 Mr CW.

Yes! 73 de VK2AOE

73!!!

@@TheArtofEngineering Love your videos.

Tu for the comment. Most of the knowledge was other people’s knowledge! It is great how generous hams are!! 73 mate.

Hi Justin ...I'm away a few days will get back to you shortly with that info 73

@@TheArtofEngineering thank you!

Me again... I have been very organic in my approach so schematic is problematic for the monster....pretty sure it is a bog standard VXO colpitts stage 1 and npn transistor keyed buffer. I think it is built like the Swedish Pixie in the Pixie files link below - Find the "Swedish Pixie" I only used the xmit stage as the rcvr was problematic for me. www.gqrp.com/The_Sprat_Pixie_File.pdf I then up the power with a BD139 stage care of Peter Parker gets me 1.5-2 watts. go to 14 mins 27 secs video link belowfor cct. ua-cam.com/video/CPmKFJGvc8w/v-deo.htmlsi=dmfJeY1FMJMCzZ7s All very basic stuff but it works for me for sh#$%ts and giggles! Hope this helps....happy homebrewing! I just spent 2 days building a QMX mini from QRP Labs and it is D.O.A :((((. 73

Good point …. Gotta try for kiwi land 🐑🐏🐑🐏🐑🐏🐑🐏

Hi …. Yes lotsa fun! Here is a link to my other video. You don’t have to watch it just read the video description! Used to be just 80m TUESDAY evenings 0900UTC to as late as 1400z. So this description doesn’t tell u new 40m net, which is very popular! 0700 - 0900z 40m 7.025 - 7040 k 0900 - 1100z 40m freq as above 80m 3.540 -3.570 k 0900 - 1300z 80m freq as above Also email Mark Bosms and get on the email rag chew newsletter (all part of the fun!!) mark.bosma@icloud.com 73 and thanks for popping by! ua-cam.com/video/cKUpTPViK94/v-deo.htmlsi=zzHF9oIog89KGLPW

I just masked off the Gyprock wall and used blackboard paint. Fun place to noodle ideas! 73 de VK2AOE

@@TheArtofEngineeringThanks sir

Thank you....I normally calibrate whenever I change the range of "stimulus". I must of not done it in this case. Thanks for that tid bit of useful information that I didn't know! Just tried it and 100% correct. Nice to know as it will remind me to do it! 73 and TU OM most useful.

I think it is black paint :)

For me ...perhaps the only way!!! :)

I buy a lot of of stuff on Ali Express. The component quality is often hit and miss though....all part of the fun I guess? 🤣🤣 Thanks for popping by! 73 de VK2AOE

Yes! It snapped together in such a satisfying way. Totally agree the solid weight in the palm of your hand and performance makes it amazing value. This is why I will be shopping again tonight before the “good thing” comes to an end! 😜 73 and thanks for popping by. De VK2AOE

I did stand them up in the end. My latest build is even more of a disaster... but will operate on it soon. It still has got me to Victoria though but chirpy :) The QRP LABS QCX mini is a ripper! 73 de VK2AOE ua-cam.com/video/M7MuVNmIXb8/v-deo.htmlsi=YdPLJzxRIQrjBR_W

I am by no means an expert. Obviously be very careful as the voltages are deadly!! Only proceed if safe and you know what’s going on. Have you tried with driver tube removed and heater switch on…. To see if that kills receive? It is an interesting fault? Let me know what caused it, when the solution is found? I will keep my ear to the ground and if I hear anything helpful will pass it on 73 de VK2AOE

​@@TheArtofEngineering First of all, I can't be more grateful for your quick response. This equipment has just arrived in my hands because I really like valve equipment. They seem like engineering jewels to me. I have carried out the test that you propose, If I remove the Driver valve, 12BYA and right after I activate the heater. The reception is perfect, it is not lost. Thanks again

Apparently it could seem like a valve problem. I don't rule it out. What happens is that I have tried a second valve and the problem persists. Unfortunately I don't have a valve tester to know what condition these two valves are in.

Yes…. Twas very helpful for the build. Tnx fer the comment 73 de VK2AOE

Thanks .....It is a bit of a mish mash and a bit deaf...but I have worked some QSO's in OZ and has been a lot of fun! Thanks for the comment 73 de VK2AOE George

muchas gracias!!

100 % agree! Been a great unit. 73 and thanks for dropping by de VK2AOE

Yes …. But I removed the 50 ohm resistor to earth at input and the pot. So mine was a fixed bandwidth (narrowish but I didn’t measure it?). So 4:12 is the cct as provided by the original creator. I found the bit I removed were causing too much attenuation for my preamp. 73 de VK2AOE.

@@TheArtofEngineering thanks

It narrows the audio frequency passband… so it is a poor man’s substitute for narrow IF type filters. 73 and tnx fer the comment.

Thanks! Was it a synthesised VFO, Xtal or VXO? Transceiver or xmitter? Love homebrewing. 73 de VK2AOE

I used a 74HC240 and a crystal and irf510 I am currently working on a jfet vfo for it. It's a good little oscillator and could even be driven by a DDS etc. hope to catch you on CW soon 😁

😆🤣🤣 All my CW QSO's are a battle!

Thanks for the comment. Twas a great life and best job at sea. CW is in a real Renaissance here in Oz. The QRS net is growing weekly and lots of interest in code! 73 de VK2AOE

My friend ….Mr AI wrote it for me ! 😜😝😝

Yes …. I send more smoke signals than RF! 😝 The static sensitive stuff has gotten better over the years. I worked for a data com company and the chief engineer used to belt me when I didn’t plug in my anti static lead… the chips were $$$$$ back then.

Thanks Peter. I saw your video for the “toy” 40m rig. Makes a huge amount of sense to dodge that possible nearby opposite “image” freq for a DC rig. … especially if the band is busy. I have a matched variable… might give it a crack! Thanks and 73 OM

You tease me with these tidbits! Yes please . I am like Charlies mentally deranged progeny....baaaaaaaaa

@@TheArtofEngineering I have all these parts and no time to do anything with them. My X Phase QRM box is still in bits whilst I try to get it to react to the PTT control at the back of the FT747GX that goes from 12V 0v when you key the mic. 0.6V when you press the MOX and 1.2V when you key up on CW. The P channel MOSFETs are still in their bag next to the little SMD variac diodes. No through hole ones I’m afraid. How’s the DTs ?? Beer steadies the hands

I tried to send my CALLSIGN and QRZ? After each K …. But no reply!!!! 🥹

Yes …. Correct. But I’m an AMATEUR radio operator not an RF engineer. So it is Digital Synthesis (as the RF is produced by digital means) but NOT DIRECT Digital Synthesis. It is my understanding that DDS only allows a change of frequency if the reference clock is changed …. So this might be why amateur projects don’t use it (too complex?). Why would you use a true DDS for a simple CW transceiver if a PLL derived signal suffices? By the way no offence taken, this type of comment is how we all learn about this hobby we ALL love together: if you do find a DDS (or design one) drop me a line. 73 de VK2AOE

@@TheArtofEngineering "..but I'm an AMATEUR radio operator not an RF engineer.." running a UA-cam channel labelled "The Art of Engineering" ? whatever, its only UA-cam. Your description of DDS is totally wrong, Google will sort you out there. There are a number of REAL DDS VFO and sig gens kits and projects already out there, created by amateurs, most seem to use the AD9850 chip, and no they are not really anymore complicated than this circuit. 73 de G0AFV

@@bazzaar1869 I have a Radiocommunications Engineering Certificate… Fine Art Degree and I’m part way through (18 months) of a Mechatronics Degree. Hence the channel title. As for UA-cam “sorting me out” …. I do this for enjoyment…. But the channel does grow up to 100 subs per month, so some hams are enjoying the content. 73 OM.

G0AFV is right... This is NOT DDS... Little details are important, and this video is not being presented as "entertainment"... I only stopped to watch this myself because I suspected the title was wrong... and sure enough.. it was. Otherwise it's a pretty good video but people like me are always looking for dumb little mistakes like this to form an opinion about how reliable the information really is... Careless neglect of details like this make me wonder what else is wrong in the video... maybe ask a "technical" friend to review it before posting it on YT. There's already enough "noise" out there, don't make it worse... please.

@@bobsimmons5274I agree Bob but also disagree. I could show any video to several “technical” friends and they would disagree across a wide variety of aspects of any given video, hence leaving this comment section OPEN to express disdain, or point out errors. As for the misuse of this term, that genie has left it’s bottle and is now on a worldwide vacation! Have a look on the net …. If you want to buy or read about this “NOT a DDS VFO but PLL derived digital VFO “ …. the vast majority of products and articles and videos are titled “DDS”. Be it YT, Ali Express, Evil Bay…. etc etc etc. Language, even technical language changes over time due to semantic drift (sometimes towards more precise and correct meaning, often away from it). The tribe have spoken and no amount of zeal will change this fact. YT is a forum that provides YOU the opportunity to share stuff. You could make a video pointing out your disdain of the current practice of misnaming this VFO? I’m thinking about doing one now 😂. Thanks for the comment, I will change the title, in the name of technical precision and YES, I will make a video to confess my technical incompetence. 73 OM de VK2AOE.

It is probably best to describe lift using one or the other. I think for the NSW HSC either is OK. I suspect both have a part to play. Newton's flow turning explanation and Bernoulli explanation. see link below 😜 www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/wrong1.html#:~:text=Therefore%2C%20the%20molecules%20going%20over,the%20airfoil%20produces%20the%20lift.

Thanks Peter. I love spending time looking for possible ham uses of things I come across…. I’ve built a CW key from BUNNINGS bits and found numerous cases in Hot Dollar stores too. 73 de VK2AOE

Before I my wife throws anything away I have to vet it to see if it could be any future use in the ham or engineering world. Not much ends up in the bin. 😃 G1UOD.

Thanks for the feedback Peter. I do overdo them sometimes. 73 de VK2AOE.

Yes.....2 primary windings in series. Video 2 in the series shows the current clamp primary current value for one transformer (1.7 amps) and then 2 transformers in series less than 300mA. The supply is now my main shack supply and is still going strong! 73 thanks for the comment de VK2AOE.