Cool coin! I just bought a second coinage Henry VIII half groat.
@robertlabarbera55463 ай бұрын
I love these old, regenerative radios...thanks for showing this one off!
@lensmanonline5 ай бұрын
Hi Mark hope you're well. What a fascinating piece of history in in great condition for its age, a couple of questions, what voltage would it have run at, and if it could be powered up could it work as intended. Best wishes stay safe Jon
@ringfinder19625 ай бұрын
I think it was originally 24 volt plus eht to run the tubes and yes it looks very sound for something 80 years old and it would still work today with correct plugs. It came from a radio ham and has been looked after, cheers mark.
@untrust20335 ай бұрын
I have one of the tubes these used, its an excellent tube even compared to modern gen3 stuff and the later KITE tubes
@jacopoalessi67896 ай бұрын
Sorrynto bother you I've just bought a set.of this nvg, I don't want to brake them but I need to unscrew to get to the tube. I unscrew the little red screw on the side and then?
@krisdavison93558 ай бұрын
Had one of these in 1978 when I was 14 good old memory's each month waiting for my delivery of treasure hunting to come thanks for the memory
@thevintageaudiolife8 ай бұрын
Hello! that's a wonderful receiver! thank you for sharing.
@bussi78598 ай бұрын
You could also make a super regenerativ receiver, that gives gain and selectivity that is a lot better.
@grzondziele8 ай бұрын
How many such receivers was built in concentrations camps? With ferrite rode? Source please.
@hamplars8 ай бұрын
Hey Mark. Me and my friends are doing a project for our final year of high school. We are in great need for an electron gun and we're working on a low budget. Since you mention you got yours for a relatively "cheap" price on ebay, do you have any tips on finding electronics, or in this case specifically an electron gun for an affordable price? We found a broken one that looks very similar to yours. The glass bulb is broken but we are unsure why the electron gun itself is not working. Is this something you are familiar with and would possibly be able to assist us with? Thank you Mark, keep up the good work! :)
@ringfinder19628 ай бұрын
Hello paid about 80 pounds for my example on ebay and the tube has minimal use and the high tension module that supply HT was about six pounds if you are interested in mine you are welcome to see it in operation and pay me what it owes me because I have a low attention span regards Mark frow swindon.
@ringfinder19628 ай бұрын
A broken bulb will mean that it has lost its high vacuum and no electons will flow. The tungsten filament which is operating at about 6 volts will emit electrons and these will be accelerated by about 5kv ht by the use of electrostatic focusing lenses within the tube to impact the fluresesant screen to cause the electron beam to be visable as a green dot. The electron beam that is flowing through the tube is negatively charged and is very easily bent by a magnet. I was lucky and a school was selling some old stock and the seller was unable to test the tube so I bought it at a fair price, it is most important that the filament is intact or the tube will be useless. Philip harris who still sell these tubes today ask about 500 pounds for them but if you are prepared to take a gamble on ebay can pay off- I could easily get my money back but you need to be very carefull with posting because the tube is evacuated to a high vacuum and will implode if broken so maybee the postman will crap himself or herself, a facinating item indeed.
@v8pilot8 ай бұрын
My dad had some headphones like that. He filled them with canuba wax and smoothed it off so that there was about 10 thou between the iron diaphragm and the wax. He said that raised the resonant frequency to give better quality.
@ringfinder19628 ай бұрын
What a brilliant idea' that's a new one for me and nice you remembered that.
@manuelarita68018 ай бұрын
It`s quite lovely. l have a 1568 Coronet one but far more worn. l love it anyway.
@vintagetransistorRadio.Radio.h8 ай бұрын
Voo😮😮 nyc . Thanks for sharing
@vintagetransistorRadio.Radio.h8 ай бұрын
Vooo 📡 sir
@johnbelcher71648 ай бұрын
Still Running valve TV today
@Mark3ABE8 ай бұрын
It would also be possible to make use of a triode, or almost any other valve, connected as a diode, so that the only voltage required would be the filament voltage. However, with a triode, it is possible to improve sensitivity and selectivity enormously by using regeneration. If you have an old battery valve, designed to operated on a HT voltage of 90 volts, it will, in fact, operate quite well right down to twelve volts, particularly when used as a regenerative detector.
@oguzhan0019 ай бұрын
3:50 Lots of swing music, for sure.
@MadeleineTakam9 ай бұрын
That valve/tube looks in fantastic condition after so many years. Do low voltage valves/tubes suffer from less “Carbon build up” that I see on other old valves? I am sorry if the question is silly, but have never built anything with valves and have no experience of them. When we about 10 years old my sister and myself built a crystal radio following directions in the ladybird book that we manged to get hold of in République du Cameroun. We didn’t even understand the difference between NPN and PNP then, but just kept pulling transistors out of old junk until we found something that worked like the OC71 in the book. A year later we figured out using a 741 to increase the volume. Great content by the way. Have subscribed.
@ringfinder19629 ай бұрын
Thank you for your interest and I would say that battery valves do suffer less although you cannot usually see the filament glowing due to the low voltage and yes I also have the ladybird book on how to make a transistor radio with the old germanium mullard oc71 infact this radio will easily use one in place of the valve.
@WestcountryboyJamie9 ай бұрын
(I've been in the Sir Daniels lately Sharky)
@ringfinder19629 ай бұрын
I will try to catch up with you soon.
@lensmanonline9 ай бұрын
Hi Mark hope you're well, great review of a piece of history, very well explained and fantastic that it still works after all those years. Best wishes stay safe Jon and Karen.
@secretarykilkennychoir71379 ай бұрын
Didn't they also use a lump of coal as a point contact diode. Even easier to come by. The coil will have some self capacitance between the windings so with a certain number of turns you get resonance at a particular frequency (120 for Medium Wave). A simple tuner involves scraping away the shellac and running a piece of tin across the turns to effectively shorten or lengthen the coil.
@timhofstetter56549 ай бұрын
Your closed captions here really suck.
@WestcountryboyJamie9 ай бұрын
I thought the notepad was going to catch fire haha, similar to what's in a taser gun I'd have thought. (I couldn't make it yesterday, will catch up next thursday if you're about). Jamie
@lensmanonline9 ай бұрын
Hi Mark hope you're well. Wow that was awesome didn't expect it to be that powerful, don't think I'd want that in my pocket 😮. Best wishes stay safe Jon
@ringfinder19629 ай бұрын
Thank you Jon, I must stop buying this crap.
@clkbateman10 ай бұрын
Very nice setup and has some entertainment value. What would that tube have been used for?
@electronixTech10 ай бұрын
Speaking about losing those plastic clips it looks like another black plastic clip just fell off of your metal detector into the grass at time 3:20. I got into metal detecting back in 1987 buying a used Fisher 1220X from a doctor who bought it new but never had the time to use it.
@youngplayboy78611 ай бұрын
Hmm...🤨
@lensmanonline11 ай бұрын
Hi Mark hope you're well. Definitely an amazing bit of kit and a very unusual one, great explanation of how it works. Best wishes stay safe Jon and Karen
@ringfinder19629 ай бұрын
Looks a bit like something from Dr who.
@elszrvee11 ай бұрын
Underrated
@jozefbubez611611 ай бұрын
OK! So you are using the valve as a diode? As for battery longevity, I just hauled out a pair of AAAs made by Philips expiring April 2003 from a digital pocket multimeter; no corrosion and they light up a 1.5V 0.3A pea-bulb perfectly!
@martinriley10611 ай бұрын
I used one of those in Northern Ireland in the 1970’s (later iteration) but they are heavy when strapped to an SLR. So carrying that for 3-4 hours at a time is arm breaking.
@yoffy590211 ай бұрын
Where is the resistor,transistors,capacitors and tunning?
@petermainwaringsx10 ай бұрын
🤣
@oliverlangan362011 ай бұрын
Nice one mark. Put your hand through the spark. I’ve heard it feels nice
@ringfinder196211 ай бұрын
Cheers ollie electrifying indeed, Thanks for the reply.
@oliverlangan362011 ай бұрын
@@ringfinder1962 no worries. We need to go swimming together one day bro
@wouterke9871 Жыл бұрын
That is a Oldelft 7 x 200.
@lucianoperitore7891 Жыл бұрын
Hi, I've the seme model but probably the tubes are exausted. Where can i find the cv6099 tubes? Does it exist some similar and more economic model of tubes??
@lensmanonline Жыл бұрын
Hi Mark hope you're well. As always interesting stuff, I wouldn't want to have my hand in between those electrodes I would think you'd get a nasty shock. What would it have been used for all those years ago. Best wishes stay safe Jon and Karen
@mtkoslowski Жыл бұрын
A simple CW transmitter perhaps? You should see what frequency it’s txing at - these devices are fun but highly verboten.
@ringfinder196211 ай бұрын
Cheers Jon yes an interesting surviving example which may have powered early xray tubes, it has high voltage with some current so could be dangerous my contact email is [email protected]. Send me yours and I will send you some photos.
@bill-2018 Жыл бұрын
PM2 type valves like in the H.A.C. one valve radio kit I made when aged 14. I've got several valves, bases, etc. bought at radio rallies and want to make one again. I can start now. G4GHB, I forgot to say it was a regenerative set.
@DavidBrown-in8hi Жыл бұрын
Isn’t Radon dangerous though? That why I got rid of my Radium dial.
@jeremyp7293 Жыл бұрын
Do you still have the one you say dosn't work at 7:40 ? I'm interested maybe I can try fix it and use it to build a monocular. I know it's a video from 2015...
@ringfinder1962 Жыл бұрын
Sorry they are long gone
@kenny4025 Жыл бұрын
Very nice item ,can you show more on the illumination scope and the mounting of the scope
@abundantYOUniverse Жыл бұрын
Really good thanks.
@miasmaki Жыл бұрын
where can i find a cheap vr21
@mohamedahsan5914 Жыл бұрын
I have some valve do you buy
@mrskitscarbootking814 Жыл бұрын
WHAT batteries DOES IT TAKE CR-125 ?????
@ringfinder1962 Жыл бұрын
It takes a standard 1.5 volt c cell torch battery and this is stepped up by the inverter to about 5 kv.
@lensmanonline Жыл бұрын
Hi Mark hope you're well. I must have missed this one, great piece of history, if they could talk what stories they could tell. Best wishes stay safe Jon
@nikolaigarage Жыл бұрын
Hi anything about Swindon
@jamesmasters2971 Жыл бұрын
Whats it worth? I have the same 1 here
@ringfinder1962 Жыл бұрын
30 or 40 pounds usually on ebay- a nice bit of nostalgia.
@jamesmasters2971 Жыл бұрын
Its a tr200 isn't it? Nt sure weather 2 sell or use lol, jus been told tape 2 9v battery together so I did and it works
@jsd8981 Жыл бұрын
I had the bigger brother to the tr machine,,that was the C Scope ib/tr 100,,,almost exactly the same machine they both used pp6 battery's,,,both where good machines for there time,,still miss my ib/tr 100,,,of this was a long long time ago better days,,,LoL
@ringfinder1962 Жыл бұрын
C scopes like this got many people interested in the hobby and this example still has its pipe finder licence application form so the owner did not use this one much in its life.
@jsd8981 Жыл бұрын
@@ringfinder1962 yep I used to have a license for the one I had as well,,but that was way back in the day,,if I remember right it was about £8...but as you probably know you don't need a license any more,,,in those days you needed to have a license for a radio of any kind,,but the government realised there was no way to enforce it,as there where so many around,,including pocket transistor radios lol....😄
@jsd8981 Жыл бұрын
@@ringfinder1962 yep I had a license for mine in those days you had to have a licence for a radio,even a transistor radio,,even the pocket kind..😀
@lensmanonline Жыл бұрын
Very interesting and informative Mark
@bertallsort694 Жыл бұрын
Thanks for the lesson Brian, Amazing when you think what it achieved, any detecting lately?
@ringfinder1962 Жыл бұрын
I have been detecting but nothing worth a video. Thanks for the comment.