From practical wireless August 1955 to Christmas 2024.

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  • เผยแพร่เมื่อ 23 ธ.ค. 2024

ความคิดเห็น • 99

  • @user-rf9me7xm1w
    @user-rf9me7xm1w 22 ชั่วโมงที่ผ่านมา +19

    Oh Michael, that was true nostalgia for me. At the age of 6, I "helped" my uncle construct that project in 1955. Although he was coal miner, he had an avid interest in all things electronic and tutored me whenever possible. I had a fascination with his AVO minor which he taught me how to use without destroying it ! Happy days which fired me up and resulted in many enjoyable years of employment, culminating in 30 years of teaching at my local tech college. As late as 1980, thermionic device theory was still on the syllabus for the B/Tech and City and Guilds courses I used to present. I therefore owe a lot the Practical Wireless, and my uncle of course. Many thanks for sharing this with us, best Christmas wishes.

  • @petervideos8699
    @petervideos8699 2 ชั่วโมงที่ผ่านมา +1

    Hi Michael great job works very well Merry Christmas and happy new year thanks for all videos all the best from Peter 😀🏴󠁧󠁢󠁳󠁣󠁴󠁿

  • @davidjennings9253
    @davidjennings9253 2 ชั่วโมงที่ผ่านมา +1

    Hi Michael, that took me back in time. I started to take Practical Wireless magazine in 1960 and was so keen on building circuits but not so much wireless. I was building my 1st electric guitar and realised I needed an amplifier so trawling through the pages I found a kit to build a Mullard 510. I saved my pennies and ordered it and I can still remember the smell when I opened the box of parts. So exciting !!! I duly assembled the amp and it provided me with a few years of service until I could afford one with 30 watts. There really isn't anything to touch valves for guitar and again the smell is magic. I wish I had saved all of the copies of that mag as I had it right up to 1966.
    I then started sn apprentership with the Marconi Company in Chelmsford where I worked for 22 years when they folded. Great times and a great video - Thankyou !!!

  • @matambale
    @matambale 19 ชั่วโมงที่ผ่านมา +8

    I am a goof. When you mentioned the daughter and the grandkids asleep downstairs, I turned down the volume and kept it quiet in here.
    For a video I am watching. Recorded earlier. 4690 miles away.

  • @vulgivagu
    @vulgivagu 19 ชั่วโมงที่ผ่านมา +5

    In 1962 as a 15 year old I built a HAC (Hear All Continents)radio from a kit. It had two valves and I remember the thrill of seeing the valves glowing in the dark when I had gone to bed and was listening to it in the dark. Something very special about a lit valve.

  • @German_byte
    @German_byte 9 ชั่วโมงที่ผ่านมา +3

    Thank you Michael. I really enjoyed watching you completing that Practical Wireless project. What a great job you made of it.

  • @TimHollingworth
    @TimHollingworth 13 ชั่วโมงที่ผ่านมา +2

    Brilliant project. My dad's friend gave me a lot of vintage stuff. I remember dumping hundreds of old PW and PE magazines by F.J. Camm, years later. Probably worth a bob or two now, but I needed the space. I wonder what other gems I lost over the years. I remember he gave me a power amp that came in two giant metal boxes. I think one of the boxes had 4 KT66 valves and some seriously heavy transformers. I was probably around 10 or 11 years old. The best device was an old dictaphone that recorded onto paper magnetic disks valled a "Recordon." To erase the disc was a hand held bar magnet. Now that one is still in the garage with recordings of Radio Caroline and my long dceased grandad. Must get it working one day... 😳

  • @frankowalker4662
    @frankowalker4662 8 ชั่วโมงที่ผ่านมา +1

    You did a better job on the cabinet than I could have. Looks great. Growing up in the 70's, I didn't read comics, I read Practical Wireless. LOL.
    🎅Merry Christmas Everybody🎅

  • @crr8297
    @crr8297 18 ชั่วโมงที่ผ่านมา +3

    Excellent job, thank you for bringing 1955 back to life... Merry Christmas

  • @iancooper2338
    @iancooper2338 20 ชั่วโมงที่ผ่านมา +4

    Great job MD! Enjoyed your articles in Practical Television (along with the rest of its content), the anticipation of a new magazine, sadly missed now, was a highlight of the month. Thank you for continuing to deliver and share your great content on TH-cam! Merry Christmas and Happy New Year to you and your family!

  • @rriflemann308
    @rriflemann308 20 ชั่วโมงที่ผ่านมา +3

    very nice, (especially the cabinet) happy Christmas to you and yours

  • @eddyaudio
    @eddyaudio 13 ชั่วโมงที่ผ่านมา +2

    Excellent work Michael and good work the cabinet well done it looks Wonderful,Ian from Australia,

  • @jimsimpson1006
    @jimsimpson1006 18 ชั่วโมงที่ผ่านมา +2

    Nice project Michael and love the nostalgia, especially that copy of PW from 1955. I think you managed to get a very genuine 1950s look with that cabinet!
    A very merry Xmas to you.

  • @leedale4008
    @leedale4008 9 ชั่วโมงที่ผ่านมา +1

    Excellent job and you cut wood with precision,spot on 👍

  • @kendom33
    @kendom33 23 ชั่วโมงที่ผ่านมา +4

    Another great video Michael. Thank you so much. Merry Christmas ans continued success in 2025. You sir are an absolute legend..I've been a follower since your articles in practical television

  • @johndunleavy
    @johndunleavy 17 ชั่วโมงที่ผ่านมา +3

    Splendid. Well done Michael.

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Can't belive I made such a good job of cutting the wood, I think someone's looking over me.

  • @glasslinger
    @glasslinger 18 ชั่วโมงที่ผ่านมา +2

    I can't say much for the weird circuit but the dad gum thing plays! That's what counts! Good job! Merry Christmas to you!

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Thank you for that, we both have a similar interest in valves, the only thing is I can't make mine like you do!!!

  • @NigelDixon1952
    @NigelDixon1952 8 ชั่วโมงที่ผ่านมา +1

    I had a subscription for Practical Wireless from being 12 years old. I'm 72 now! I used to read it from cover to cover. Anyone remember the Sinclair kits? Oh, and the army surplus. I bought a 31 set, and took out the BBC TV 6pm news for the whole of my village! I was soon informed of my mistake, by violent hammering on our door! Happy days!

  • @andymouse
    @andymouse 20 ชั่วโมงที่ผ่านมา +3

    Awesome ! Merry Christmas to you and yours !

  • @xyredmax
    @xyredmax 8 ชั่วโมงที่ผ่านมา +1

    Bringing life to a handful of components always makes me smile - Nice job MD. have a great Christmas and if you're down in South Somerset next year, pop in for a cuppa and a workshop tour. All the best MJ

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Sadly we don't go away too far now we have two small children in the house as well.

  • @Timothycan
    @Timothycan 8 ชั่วโมงที่ผ่านมา +1

    Thanks for sharing that, a great project.

  • @jameselder1631
    @jameselder1631 19 ชั่วโมงที่ผ่านมา +5

    Great video. Liked the silent bits. If you listen to some creators now, they will say 'What are we gonna do in this video, well in this video, what we are going to do is we are gonna...' Too many words saying nought. Sorry to hear about your talented friend, I think I might know him. Re the sawing, I am happy to pop up and show you how to do it really easily, take about 15 mins, failing that, if you want to send me specs of anything in the future, I can soon knock things up.

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Graham wasn't realley my friend as such, more or a customer but I have known him for well over 40 years, he was always coming into the shop I worked as a kid buying tools. Re the wood, I can't belive I made such a good job with a hand saw, I think someone's looking over me.

  • @matthewgriffin4761
    @matthewgriffin4761 7 ชั่วโมงที่ผ่านมา +1

    Another great one. Merry Christmas and Happy New year to you and yours.

  • @ukfmcbradioservicingTango21
    @ukfmcbradioservicingTango21 22 ชั่วโมงที่ผ่านมา +2

    That's a great fun project you've built there, Michael. My only snag would be obtaining the coil.
    All the best to you over Christmas,
    Richard

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      The coil was a lucky chance buy, I saw a load of radio coils adverized on e Bay, most of it crap and I could see what appeared to have part of the correct number on so I tool a chance!

  • @steveurquhart5895
    @steveurquhart5895 8 ชั่วโมงที่ผ่านมา +1

    A really enjoyable video Thanks. Happy Christmas Michael.🎄

  • @tenmillionvolts
    @tenmillionvolts 18 ชั่วโมงที่ผ่านมา +1

    What a lovely result. Most of my kits didn't look like the original. They ended up in ice cream containers and the like. Presentation was not important when I was a kid. My dad would sometimes build a case if he had time. As I get older, I've been considering mentoring some younger children in electronic projects to keep the hobby alive. I'll see if I get enough time. Just got back into audio repairs and it's busy.

  • @knight19681
    @knight19681 18 ชั่วโมงที่ผ่านมา +2

    vary nice job. well done. happy xmas.

  • @richardh100
    @richardh100 22 ชั่วโมงที่ผ่านมา +2

    thank you Michael a great video and what a great Project to pick , and great cabinet work Merry Christmas 🎉

  • @heifferman9021
    @heifferman9021 23 ชั่วโมงที่ผ่านมา +4

    Brilliant job. Looks very much the part.

  • @johnrudd9550
    @johnrudd9550 20 ชั่วโมงที่ผ่านมา +1

    Thanks for the video Michael, I was born in the late 50’s so grew up with valves and transistors… best wishes to you and your family for Christmas.

  • @radio-ged4626
    @radio-ged4626 9 ชั่วโมงที่ผ่านมา +1

    Great job Michael. Makes me want to try it myself - but I'm a little busy right now. If you remember, earlier this year you went to J. Birkett's in Lincoln and filmed the inside of the shop of vintage electronics and various aeroplane instruments. I decided to visit that shop and bought a Marconi R1155 "Lancaster Bomber" receiver. Well I'm currently deep into its repair, checking resistor values, replacing crumbling wires etc. Not going to be finished for Christmas next year at the rate I'm going at (especially as I've decided to reconstruct the DF circuit), but an enjoyable project none the less. Wishing you and your family a Merry Christmas and a very happy New Year!

  • @Falco45able
    @Falco45able 23 ชั่วโมงที่ผ่านมา +2

    Thanks for taking the time fella stay lucky, stay safe, and a merry Christmas to you and your family!😉🎉

  • @Lyndalewinder
    @Lyndalewinder 19 ชั่วโมงที่ผ่านมา +1

    Case looks very good Michael - well done - nice project overall, thanks for posting. Best wishes for Christmas and new year and looking for ward to the next video!

  • @kennethmcclure29
    @kennethmcclure29 19 ชั่วโมงที่ผ่านมา +1

    Well done sir. I love the older tube design. Trf radios do work well . Thank you, Ken from gpt ms

  • @ronroberts34
    @ronroberts34 23 ชั่วโมงที่ผ่านมา +1

    Excellent work. I love those old Practical Wireless projects. You did a brilliant job. Have a great Christmas and thank you for a cracking channel.

  • @marssiantenni
    @marssiantenni 8 ชั่วโมงที่ผ่านมา +1

    Nice project!

  • @floeki-jekker
    @floeki-jekker 10 ชั่วโมงที่ผ่านมา +1

    lots of fun work that today is nothing more than an app on your mobile smartphone.

  • @matambale
    @matambale 19 ชั่วโมงที่ผ่านมา +1

    Really enjoyed this Michael, thank you. That's some fine cabinet work!
    Merry Christmas to you and yours.

  • @leetucker9938
    @leetucker9938 20 ชั่วโมงที่ผ่านมา +1

    I like it , happy Xmas to you and your family

  • @mistermikeanson
    @mistermikeanson 20 ชั่วโมงที่ผ่านมา +1

    Have a great Christmas Michael!!

  • @audibell
    @audibell 10 ชั่วโมงที่ผ่านมา +1

    Merry Christmas and a happy New year

  • @steve83803
    @steve83803 20 ชั่วโมงที่ผ่านมา +2

    Must be a trade issue with cutting wood straight as a now retired TV engineer I can’t either. I was OK with Fablon at Radio Rentals when we used to re-cover the teak cabinets in black. Great project Michael and have a great Christmas

  • @normanm5979
    @normanm5979 21 ชั่วโมงที่ผ่านมา +3

    I worked for the BBC on transmitters from the early 1960s. EF50s were used for a lot of RF low power units and they rarely needed replacing even running 24/7 for years. Well done Michael even if you mistook the suppressor grid for the screen grid!

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      I was pointing to the wrong valve, it's V1 where the screen grid is returned to cathode.

  • @andrewbirkett-q9e
    @andrewbirkett-q9e 22 ชั่วโมงที่ผ่านมา +6

    Sorry Michael, that appears to be the suppressor grid, the screens are up to HT+ and resulting HT on the kathode, suppressor grids are normally tied to the kathode or ground but can be used as secondary control grids. Keep up the good work, love your videos.

    • @ericrawson2909
      @ericrawson2909 12 ชั่วโมงที่ผ่านมา +2

      No, he was pointing at the wrong valve during part of the video. Yes, V2 screen goes to HT, but V1 screen is at V2 cathode potential.

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Yes, you are indeed correct, I should have been pointing at V1, where the screen grid is returned to cathode.

  • @barrymayson2492
    @barrymayson2492 12 ชั่วโมงที่ผ่านมา +4

    The EF50 probably the most important valve during the WW2 made by Philips in the Netherlands. The basic valve for most radar sets display system. I suspect that is why they were used in the circuit as they were very cheap and plentiful.

    • @buttyboy100
      @buttyboy100 5 ชั่วโมงที่ผ่านมา

      While the Philips factory at Eindhoven was under Nazi occuption from 1940, EF50s were made by Mullard in England. Later Sylvania in the USA produced vast numbers of them.

  • @hymermobiler
    @hymermobiler วันที่ผ่านมา +2

    Merry Christmas Michael!!

  • @Linkvagen
    @Linkvagen 23 ชั่วโมงที่ผ่านมา +1

    Nice job! Have a really Merry Christmas!

  • @MichaelBeeny
    @MichaelBeeny 22 ชั่วโมงที่ผ่านมา +2

    The first time I had ever seen a EF50 was at tech collage on a very old, even then, TV that seemed to have dozens of EF50s in every stage except those needing power valves. The big red can made them look lifeless as you could not see inside, not even the heaters.

  • @martinpickering8463
    @martinpickering8463 9 ชั่วโมงที่ผ่านมา +1

    Hi, Michael. "Jack Armstrong" here of "Television" magazine fame. I built at least one superhet valve radio in my teens. In fact I blew my Dad up with it: I fitted the reservoir capacitor the wrong way round! Anyway, your plywood cabinet looks just fine to me. Ideally, the plywood needs to be cut with a saw bench, using a fine tooth circular saw but you did OK. Merry Christmas, my friend.

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Hi, Martin, good to see you here, someone gave me one of your books the other day, the sattellie screwdriver one.

    • @martinpickering8463
      @martinpickering8463 ชั่วโมงที่ผ่านมา

      @@michaeldranfield7140 Ooh, very rare. I'm not even sure that I have a copy.

  • @richardwoodwards1202
    @richardwoodwards1202 22 ชั่วโมงที่ผ่านมา +1

    That brought back memories from the late sixties when I was a apprentice Radio and TV engineer thanks to

  • @dingnextstop
    @dingnextstop ชั่วโมงที่ผ่านมา

    What a shame we can’t hear the Light Programme again or the Goons show or Cltheroe Kid… I have a 1952 Bush valve set but all those wonderful old radio broadcasts are silent now.. I can think back as a child in the 1960’s sitting with my Nan listening to family favourites, it’s so sad we have lost all that

  • @phester28
    @phester28 4 ชั่วโมงที่ผ่านมา

    valves were on the way out when i started learning electronics :)

  • @tubeDude48
    @tubeDude48 21 ชั่วโมงที่ผ่านมา +1

    It seems to being a pretty good job! 👍

  • @stuartofblyth
    @stuartofblyth 5 ชั่วโมงที่ผ่านมา

    "Practical Wireless" - described by my tutor on the RAE course 1963 as "Camm's Comic".

  • @peterhancox6962
    @peterhancox6962 14 ชั่วโมงที่ผ่านมา +1

    i used to read practical wireless

  • @dennissmith8199
    @dennissmith8199 19 ชั่วโมงที่ผ่านมา +1

    Well done Michael! Nothing like a nostalgic project for the holiday season.
    Many years ago I built a converter that received aircraft frequency broadcasts, 108-136Mkz, and rebroadcasted them on an AM 650-1700 Khz frequencies.
    I also built a Knight Kit oscilloscope kit, sold by Allied Radio in Chicago, when I was in high school, arounf 1965. I still have it and it still works.
    Question: I'm not familiar with the reaction control, what is that for? A gain control?

  • @RobertSchmitt-u7l
    @RobertSchmitt-u7l 17 ชั่วโมงที่ผ่านมา +1

    Have yall heard of BRUCE ROSENBLIT
    He has made Transcendent audio with very very well designed amplifiers,
    There is a 300b that can use rectified mains, and no output transformer and only 1 gain stage, 4 300bs in parallel.
    Absolutely right on.
    The schematic is in a very informative book Tubes and Circuits.
    Hes the one that makes sense, out of all the other recirculations of circuits, this guy explains it without confusion or obfiscation.

  • @andygozzo72
    @andygozzo72 23 ชั่วโมงที่ผ่านมา +2

    dont know if i have that particular issue, but i do have a load from late 50s to late 60s, most with the original free 'blueprints' in the ones that had them, but i have that circuit in a 'practical wireless circuits' book, always wondered how well or not that circuit would work! i have a radio that was 'home built', using 3 EF50s, but a more 'normal' circuit, i think from a 'wireless world' magazing doesnt work very well , plus another home built one. in style of a wood cased pilot major maestro, normal superhet, and works fairly well, and yet another one with a unique style case, also superhet, doest work too well !

  • @lookoutleo
    @lookoutleo 20 ชั่วโมงที่ผ่านมา +1

    Realy nice project . Interesting design , does it produce alot of heat and how many watts does it draw

  • @RWL2012
    @RWL2012 18 ชั่วโมงที่ผ่านมา +1

    3:57 what's making that beeping? for the last few weeks or so I've been hearing that exact same beeping in my street's corner shop.

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Cctv, system, so senststive it bleeps is anything moves in the video.

  • @turboslag
    @turboslag 22 ชั่วโมงที่ผ่านมา +2

    I am exactly the same with wood, can never get a good result! Metal, no problem! I have that issue of WW, interesting. Impressed that you had the metal rectifier! So, come on, own up, did it work first time?

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Yes it did work first time due to the ready made coil, but for safety I did power it first from a bench power supply just to make sure there was nothing amiss.

  • @AndyDoz
    @AndyDoz 22 ชั่วโมงที่ผ่านมา +2

    Nice work. Where did you get the chassis from? Merry Christmas

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา +1

      Had it a long time, someone was making these and selling them on e Bay, not cheap though, think I paid about £20 but it's good.

  • @andygozzo72
    @andygozzo72 23 ชั่วโมงที่ผ่านมา +1

    wonder how later valves such as EF91s, EF80s, or even high gain frame grid types EF184s would work? EF91s were certainly used a fair bit for home built stuff maybe a EF184 first valve feeding a PL84 output, for a bit more oomph, PY82 rectifier , and a nice big hot dropper resistor 😉 live chassis, of course, but class Y2 isolator cap for the aerial..??!!

  • @revolvingtoto007
    @revolvingtoto007 23 ชั่วโมงที่ผ่านมา +1

    I can receive radio Caroline on my AM radio in Antwerp 😃

  • @robturner3065
    @robturner3065 18 ชั่วโมงที่ผ่านมา +2

    Crikey! G3 is not the screen grid. The volume pot is wirewound because it's across the OPT secondary, not because of the miniscule V1 cathode current. Nice build though in spite of the schoolboy errors

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      You are of course correct because I was pointing to the wrong valve G3 is the suppressor grid, it's valve 1 where the screen grid is returned to cathode potential. A slight mistake in my un edited video.

  • @dayleedwards3521
    @dayleedwards3521 13 ชั่วโมงที่ผ่านมา +2

    What you are calling the screen grid is actually the suppressor grid, the screen grid is returned to HT, perfectly normal. It makes no difference using an RF pentode at audio, the limitation is in anode current , not relevant here because of the low volume anyway. The radio is simply a regenerative detector with one audio stage, nothing very suprising at all.

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Of course your correct, I should have made reference to the first valve where the screen grid is returned to cathode, little mistakes always creep into my videos as there completely un edited now.

  • @threelaps5282
    @threelaps5282 22 ชั่วโมงที่ผ่านมา

    I made a regenrative radio using two EF50s. The design came from a book "Fun with radio". It was probably a good design but my choice of placement of the components wasn't. Skill was needed when tunig it in, otherwise it screemed somewhat. It picked up Luxembourg on 208 metres really well and then re-transmitted it on long wave!

  • @vextenoch
    @vextenoch 2 ชั่วโมงที่ผ่านมา

    I'm a bit confused. g3 is always connected to cathode to catch second emision electrons. g2 is on B+ and that's ok.

    • @michaeldranfield7140
      @michaeldranfield7140  ชั่วโมงที่ผ่านมา

      Slight mistake in the video, I was pointing to the wrong valve, G3 is the suppressor grid, irlts valve 1 where the screen grid it returned to cathode.

    • @vextenoch
      @vextenoch ชั่วโมงที่ผ่านมา

      @michaeldranfield7140 oh, that's different story. I was reading some russian literature on the subject and i saw the same thing. They say that it is some kind of AGC or negative feedback. It makes some sense but I haven't totally understood the principle.

  • @truthreigns7
    @truthreigns7 18 ชั่วโมงที่ผ่านมา +1

    May i ask what the difference in the terms "valves" and "tubes"?

    • @johndunleavy
      @johndunleavy 17 ชั่วโมงที่ผ่านมา +2

      Valves is the British term and tubes is the American term. We call CRTs tubes in Britain.

    • @truthreigns7
      @truthreigns7 15 ชั่วโมงที่ผ่านมา +1

      @johndunleavy ok very good. I figured it was a language thing, however I was unsure. In America in the past people would call the CRTs picture tubes.

  • @JonnyMac351
    @JonnyMac351 17 ชั่วโมงที่ผ่านมา +1

    Would have been nice to see more of the construction of the radio but thanks for the video.

  • @gold27b
    @gold27b 20 ชั่วโมงที่ผ่านมา +2

    Very weird circuit. TBH, with a few more components you could have had a conventional volume control with coupling capacitors, and an audio output valve with a much lower value cathode resistor. No need to mess around with bias etc.
    I think the EF50s were chosen because there were plenty of war surplus ones available in 1955.
    I think your point about negative feedback is hardly relevant considering it is an AM receiver and TRF so plenty of distortion to begin with.

  • @moulyjeanlouis7302
    @moulyjeanlouis7302 8 ชั่วโมงที่ผ่านมา

    A QUOI Sert de dire E E E E E a Chaque fois!!!!c'est trop NUL!!!!!!!