Vintage and Reclaimed Electronics
Vintage and Reclaimed Electronics
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Bush VHF 64 Repair and Restoration Part 2
I decided to add a Bush VHF 64 radio to my collection, and it will be used daily (if I can fix it up). In this video I start the recap process and test the audio. After some progress, I hit an unexpected problem.
The Bush VHF 64 is a high-end British Valve radio dating from the late 1950’s.
มุมมอง: 334

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Bush VHF 64 Repair and Restoration Part 1
มุมมอง 1.3K2 หลายเดือนก่อน
I decided to add a Bush VHF 64 radio to my collection, and it will be used daily (If I can fix it up). In this video I start the repair and restoration process by inspecting the radio and removing the chassis from the case for inspection. I repair of one of the speaker cones was needed. The Bush VHF 64 is a high-end British Valve radio dating from the late 1950’s.
A Retro Electronics Inspired Prototyping System for Valve Circuits
มุมมอง 5005 หลายเดือนก่อน
I was inspired to create this prototyping system for my planned designs for valve circuits. I drew inspiration from books written in the 1970’s to develop this modernised system that uses peg boards. See this in action with other vacuum tube project videos.
Claude Lyons Variac Restoration
มุมมอง 1.4K7 หลายเดือนก่อน
Variac Renovation In this video we look at the renovation of a ‘Claude Lyons Regulac’ variable transformer or Variac. This unit has a 240VAC input at 2A max and is capable of 0-270VAC out. Variacs are also referred to as auto transformers.
Bush VHF 61 Valve (Tube) Radio - Repair and Renovation Part 2
มุมมอง 1.3K10 หลายเดือนก่อน
I undertook the repair, overhaul and restoration of this Bush VHF 61 radio that had been idle for 35 years. In part 2, I carry out the repair work and address the few issues with the case. Shame I could not fix the tone control, but I will look out for a replacement control.
Bush VHF 61 Valve (Tube) Radio - Repair and Renovation Part 1
มุมมอง 1.2K10 หลายเดือนก่อน
I undertook the repair, overhaul and restoration of this Bush VHF 61 radio that had been idle for 35 years. In part 1, I assess the radio’s condition and the work needed to be done.
Pye P114BQ Valve Radio Repair and Spruce up Part 1 - Inspection and Case Repairs
มุมมอง 47110 หลายเดือนก่อน
In this video set I look at the repair and spruce up of a vintage Pye P116BQ valve radio from the mid 1950’s. In this part I focus on the case repairs and assess what other work needs to be done.
Pye P114BQ Valve Radio Repair and Spruce up Part 2 - Electronics Repairs, Rebuild and Test
มุมมอง 66710 หลายเดือนก่อน
In this video set I look at the repair and spruce up of a vintage Pye P116BQ valve radio from the mid 1950’s. In this part I focus on the repair of the electronics rebuild and testing.
Yet Another Dim Lamp Current Limiter
มุมมอง 3.7K11 หลายเดือนก่อน
Ahead of my overhaul of four variacs and four valve radios, I felt I needed a device to protect my household mains electric supply and the device under test. The dim lamp current limiter or ‘poor man’s variac’ is a simple device that does just that. In this video, I go through my build which is another step in my journey in the world of vintage electronics.
Homemade Valve Vacuum Tube Tester Build - Part 2
มุมมอง 8Kปีที่แล้ว
Welcome to part 2 of my video that documents the build of my homemade valve or vacuum tube tester. In this video we focus on the prototype construction and the testing of the final build. My valve tester is based on the design by Grant Willis for his low cost, easy to build DIY Valve/Tube Tester and credit is due to him. Like, share on subscribe for more videos documenting my adventures with vi...
Homemade Valve Vacuum Tube Tester Build - Part 1
มุมมอง 10Kปีที่แล้ว
Welcome to part 1 of my video that documents the build of my homemade valve or vacuum tube tester. In this video we focus on the planning and design stages. My valve tester is based on the design by Grant Willis for his low cost, easy to build DIY Valve/Tube Tester and credit is due to him. Like, share on subscribe for more videos documenting my adventures with vintage electronics.

ความคิดเห็น

  • @claudelyonslimited
    @claudelyonslimited 11 วันที่ผ่านมา

    Great video, thank you for restoring the Regavolt unit and posting your process 😊

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 11 วันที่ผ่านมา

      @@claudelyonslimited thank you. It’s a most useful unit and used regularly.

  • @fathomisticfantasy2681
    @fathomisticfantasy2681 27 วันที่ผ่านมา

    This is absolutely fabulious!

  • @ivomattos2003
    @ivomattos2003 หลายเดือนก่อน

    Well done, very good project

  • @gino2465
    @gino2465 หลายเดือนก่อน

    Good afternoon sir, I have the same radio which I would like to restore. Would I be able to purchase a copy of your schematic and your hand written points on the schematic so I can test mine please. Also a list of parts you purchased and where you obtained them please. Shame to dump this lovely work of art. Let me know how I can communicate with you. Much appreciated. Gino

    • @VintageandReclaimedElect
      @VintageandReclaimedElect หลายเดือนก่อน

      First, if you have not worked on a valve radio, be aware of the dangers. The voltages can be lethal. Schematics are available from numerous Internet sources. The Radio Museum and the code machine for one (sorry I cannot put links in comments). The schematic is part of the service manual and that lists all the parts and what type they are. Electrolytic and paper capacitors should be changed (about 24 in total). Then all out of tolerance resisters need changing too. Valves are generally OK but expect rotted wire insulation and perished rubber. The tweeter may need work along with the high frequency speaker cone. Quite a lot of work and a complex radio. Good luck.

    • @gino2465
      @gino2465 หลายเดือนก่อน

      @VintageandReclaimedElect thank you sir. I will be extra carefull for sure.

  • @anandarochisha
    @anandarochisha หลายเดือนก่อน

    I have checked out your videos and am not ready to subscribe. Firstly, this channel is about your subjective thoughts and plans and ruminations. What yourself could possibly do and your theories and conjectures on what you can get out of it. Pointless to the onlooker to learn that you think as to why or why not you may or may not do something. It feels like I just walked into am infernal and endless debate you are having with yourself. When you get over yourself and make this channel about showing us how to do actually do or learn something I may revisit. Otherwise this is about as much fun as watching a budgie in a mirror. Good Luck. .

    • @VintageandReclaimedElect
      @VintageandReclaimedElect หลายเดือนก่อน

      Oh dear, never mind. There are plenty of other channels where you can get your fun.

    • @anandarochisha
      @anandarochisha หลายเดือนก่อน

      @@VintageandReclaimedElect thank you for your service.

  • @tubeDude48
    @tubeDude48 หลายเดือนก่อน

    Finally could hear you right at the end. Electronics Old & New did a value tester that interest you.

  • @tubeDude48
    @tubeDude48 หลายเดือนก่อน

    Also see: Jim Burns

  • @migsvensurfing6310
    @migsvensurfing6310 หลายเดือนก่อน

    Job well done. I'm glad you didn't go all out on the casing.

  • @migsvensurfing6310
    @migsvensurfing6310 หลายเดือนก่อน

    This is a good idea. The var. cap though II think should be turned around 180 deg. Looking forward to see what you do with it.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect หลายเดือนก่อน

      Yes, can still do that. Just need some time to get some projects done.

  • @wilhelmvonn9619
    @wilhelmvonn9619 หลายเดือนก่อน

    My post was meant to be a reply to MichaelBeeny

  • @wilhelmvonn9619
    @wilhelmvonn9619 หลายเดือนก่อน

    I agree. Reforming is OK for capacitors a few years old but really old ones can also dry out and lose capacitance, and become more resistive. Much better to replace if you can.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect หลายเดือนก่อน

      Yes, I am not sure about reforming so will replace. I will investigate reforming as a separate exercise on some old capacitors, but will not use them in radios. Maybe good for prototype projects.

  • @MichaelBeeny
    @MichaelBeeny หลายเดือนก่อน

    This idea of reforming capacitors is really not a good idea. ANY capacitor of 40+ years old is never going to be reliable. If the main smoothing caps go short, that's the EZ81 damaged and possibly the power transformer. Just replace them.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect หลายเดือนก่อน

      Yes, I am not sure about reforming so will replace. I will investigate reforming as a separate exercise on some old capacitors, but will not use them in radios. Maybe good for prototype projects.

  • @SkippiiKai
    @SkippiiKai หลายเดือนก่อน

    Maybe there's an obvious reason this wouldn't work, but why not run an adjustable linear regulator between the taps of the multiplier (*between* them, not to ground for obvious reasons). Each one could handle a 40v range below the tap. LM317 or 1117 ICs work at high voltages as long as the you don't reference them to ground.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect หลายเดือนก่อน

      Sound complicated. For testing valves you really only need 250V, 170V and 100V for the screen. With that, you can test almost anything. I don't have 100V screen with 250V anode on this design, but that has been rectified with a simple 100V module. I also don't like dropping lots of volts across a regulator due to heat dissipation, but that's just me.

  • @6A8G
    @6A8G หลายเดือนก่อน

    Thank you for the description, looking forward to the works!😎

  • @markpirateuk
    @markpirateuk หลายเดือนก่อน

    I have restored a couple of these sets, they do sound very nice on FM, but the AM side is pretty average at best, you should find the main smoothing cap to be fine, but all the Hunts caps have to go, as they are now resistors!

    • @VintageandReclaimedElect
      @VintageandReclaimedElect หลายเดือนก่อน

      Thank you for that. The Hunts are gone. The main electrolytic is bypassed for now. The sections were reading about 35pF. I want to try to reform it as an extra exercise and bring it back it.

    • @6A8G
      @6A8G หลายเดือนก่อน

      @@VintageandReclaimedElect Respectful suggestion, don't reform, replace. Much safer in the long run.

  • @CircuitAngel
    @CircuitAngel 2 หลายเดือนก่อน

    Would you mind sharing which two transformers and which DC supplies you used? Thank you.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 2 หลายเดือนก่อน

      Any 12-0-12 50VA transformer will do. You can go to 15-0-15 if you want a 300V+ plate voltage. The heater transformer is a 6-0-6 30VA component. I connected the secondaries in parallel to provide more current capacity. For the meter supplies, I used generic 5V 5A output, AC110/220V to DC5V 25W Universal Regulated Switching Power supplies. These can be easily found on Amazon or eBay etc.

    • @CircuitAngel
      @CircuitAngel 2 หลายเดือนก่อน

      @@VintageandReclaimedElect thank you.

  • @stevegreen5358
    @stevegreen5358 2 หลายเดือนก่อน

    Is there any reason why you couldn't get rid of all that voltage doubler circuitry and use a 1:1 isolation transformer and a couple of small variacs to set the screen and anode voltages? That would give much more flexibility.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 2 หลายเดือนก่อน

      You could do that. It is a valid approach. The point about this design is that it is cheap. Costs of an insolation transformer and variacs could be higher. You will also need to rectify the output and make a negative voltage for the grid. The voltage double circularly is not too great anyway. That said I am think about a variac based plug-in module for the screen voltage. At least my final build has the ability to plug in power modules for screen and heater.

  • @darrenh1463
    @darrenh1463 2 หลายเดือนก่อน

    I am getting the parts together to build this same tester. Do you have a link to the meters you used

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 2 หลายเดือนก่อน

      We need to be cautious about placing links in TH-cam comments. Just search for LED panel meters and you will see many options. I'm glad you are taking on the project.

  • @mfr58
    @mfr58 4 หลายเดือนก่อน

    Good creation. Look forward to your experiments....

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 4 หลายเดือนก่อน

      Me too! Just need to find the time. Thanks for the feedback.

  • @sheresound
    @sheresound 4 หลายเดือนก่อน

    Is there a particular reason for the grid (g1) being shunted to ground by the Cap 100n? In addition to increasing internal capacity obviously. Thank you.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 4 หลายเดือนก่อน

      I left it in from the reference design. It will be doing some filtering, but I would expect you can do without it.

  • @vaccarioou22
    @vaccarioou22 5 หลายเดือนก่อน

    Where would you look for replacement brushes ?

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 5 หลายเดือนก่อน

      If you have a vintage unit, then realistically, you need to look for a donor unit or craft something yourself. It's a tough one.

  • @ashuri2004
    @ashuri2004 6 หลายเดือนก่อน

    Thank you sir for the very useful video.

  • @ianhuxstep211
    @ianhuxstep211 6 หลายเดือนก่อน

    I found this extremely helpful. is there any reason why I couldn't use analogue meters?

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 6 หลายเดือนก่อน

      No reason as such, but you really need to accurately measure the 1V differential to calculate GM. I know some constructors have used analogue meters so really your choice. Thanks for the feedback

  • @t1d100
    @t1d100 6 หลายเดือนก่อน

    Do not get sucked in by the cheap prices for the Asian variable autotransformers. SearchYT for their many, many defects... Under engineered, ratings over stated, wired incorrectly, on and on.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 6 หลายเดือนก่อน

      Some Asian products are good. I have many good products. They are good at making thing to specification. If you specify cheap then that is what you get. If the cheap auto transformers are 3 time cheaper than others on the market, then you will be getting what you pay for. I had great fun renovating this one so that is another a option to get a cheaper unit.

  • @t1d100
    @t1d100 6 หลายเดือนก่อน

    Ooo... I would not have used IPA to clean the coil wires, as it might melt the enamel isolation, causing shorts. Maybe just water and a little dish soap. If the brush is in bad condition, it is very difficult to find a replacement. You can not DIY an electric motor brush. They are simply made of the wrong material. I have posted a couple of threads about this and other variable autotransformer matters, but YT will not me add a link. So, I will post an additional reply with the search information and maybe YT will let that through? You will also find my threads on building a DIY isolation transformer from two transformers, placed back-to-back. You will need that. You will also need a Dim Bulb Limiter and Emergency Shut-Down Switch, which are super easy to DIY. Search YT. I think that you are going to really like having the separate connection box and current reading feature. Okay, I will now try to add the search information...

    • @t1d100
      @t1d100 6 หลายเดือนก่อน

      EEVBlog. My handle is t1d. Use the advanced search feature and limit it to my handle. Look at the my various titles to find those on this topic. Do well...

    • @t1d100
      @t1d100 6 หลายเดือนก่อน

      Subscribed!

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 6 หลายเดือนก่อน

      Good advice. I will do that in future.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 6 หลายเดือนก่อน

      Thank you

  • @richardtattersall8634
    @richardtattersall8634 7 หลายเดือนก่อน

    Great videos - I’ve done two renovations of these radios. I agree with the replacement of all the capacitors. Good to have details of the test points.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 7 หลายเดือนก่อน

      Thank you for the feedback. The Hunts caps have about an 80% failure rate for this age. I have a Bush VHF 64 next in line.

    • @richardtattersall8634
      @richardtattersall8634 7 หลายเดือนก่อน

      @@VintageandReclaimedElect Good luck I’ve just picked up a VHF54. This looks a bit of a challenge there are loads of hunts capacitors tucked away in some tight spaces. Not the best design but I’ll get it done.

  • @lampshadesneeded
    @lampshadesneeded 7 หลายเดือนก่อน

    i bought an old variac last year and thought it was bust until i noticed the original laquer on the wire under the wiper had never even been removed. brand new!

  • @jj74qformerlyjailbreak3
    @jj74qformerlyjailbreak3 7 หลายเดือนก่อน

    Not only are they being saved from the land fill but you could provide an eBay link for me to purchase one Buy It Now. Please and thank you. Great video.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 7 หลายเดือนก่อน

      Yes will do, but they need to safe and I am afraid they sit in a queue of projects I need to do first, so maybe a delay.

    • @jj74qformerlyjailbreak3
      @jj74qformerlyjailbreak3 7 หลายเดือนก่อน

      @@VintageandReclaimedElect no problem friend. Post here and I'll keep my word. Thanks for your time and sharing your skills.

  • @terryblackman6217
    @terryblackman6217 7 หลายเดือนก่อน

    Excellent renovation. Another piece of equipment saved from the skip.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 7 หลายเดือนก่อน

      Thank you and it will be put to good use. I hope the other two I have can be fixed.

    • @jeffv.akaonsjeffke9865
      @jeffv.akaonsjeffke9865 หลายเดือนก่อน

      I would like to see a video of that fix, to learn what can go wrong with a variac. I have never used one or had one, but seems like a must for repairing amps and radios.

  • @radio-ged4626
    @radio-ged4626 7 หลายเดือนก่อน

    I didn't think to buy a second hand one, I bought a new one. Ironic when you think my hobby is restoring/repairing vintage electronic equipment. However I've made up for it by buying a really old AVO signal generator and an AVO 7. The multimeter works fine and is used for aligning IF stages. The signal generator did need rebuilding. Great video.

  • @derekloudon8731
    @derekloudon8731 7 หลายเดือนก่อน

    I always enjoy seeing a rejuvenation (and re-use) of an old piece of tech. I get a little sad about today’s “throw it away and get a new one” society.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 7 หลายเดือนก่อน

      Totally agree. I work with modern stuff as well, but this is much more fulfilling.

  • @clementeelectronicacomohob3205
    @clementeelectronicacomohob3205 7 หลายเดือนก่อน

    Hello, good morning, magnificent work, I loved it. The Variac is very useful. Thanks for sharing, greetings.😀

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 7 หลายเดือนก่อน

      Thank you for the feedback. There will be more projects.

  • @JimMcFerry
    @JimMcFerry 7 หลายเดือนก่อน

    Well done!

  • @vegard77
    @vegard77 8 หลายเดือนก่อน

    Nice Video. I actually have built my own based on the same reference design. But not looking as good as yours... So far i have used a variac for the AC input to fine tune voltages. Not used high/low voltage selector som far. Considering a seperate bias voltage supply to keep it stable when i adjust tha variac. Maybe you would like to make a video covering testing common valves like EL84/EL34/ECC83/5881/6V6/6L6 ?

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Thank you for the feedback. I love hearing about the experience of others. Good idea on the variac and valves.

  • @erin19030
    @erin19030 8 หลายเดือนก่อน

    I’ve built models similar to that, yours looks very nice. Just think if you put that 1000 pounds into a valve stock? Tube testers were the means to sell tubes and install confidence. If I were running a service business a good stock would be of the greater value. Everyone loves a good tube tester in their shop. I can see a real purpose if you are selling tubes and you want to match them. Good job!

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Thank you very much for the feedback. I know some testers are £1000, but mine was much less and a lot of fun to build. I tend to buy valves and collections and sell the ones I don't need. The tester is useful for that and will pay for itself in the long run.

  • @alanuk8677
    @alanuk8677 8 หลายเดือนก่อน

    New Subscriber here, look forward to your future projects. I'm currently restoring a vintage Hacker Sovereign II. Keeping away from the High Voltage stuff for the time being.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Good to hear that. Good luck with the project.

    • @alanuk8677
      @alanuk8677 8 หลายเดือนก่อน

      @@VintageandReclaimedElectThanks!

  • @SDsailor7
    @SDsailor7 8 หลายเดือนก่อน

    I dont understand why it is necessary to break off the side tab on the switch? Can someone tell me? Thank you

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Hi, I am not sure what you are referring to. The only switch in the system is on the mains socket and that is not modified.

    • @SDsailor7
      @SDsailor7 8 หลายเดือนก่อน

      @@VintageandReclaimedElect I have seen some videos were they break of the little metal tab that is in-between the two screws on the hot side of either the the outlet or the switch and they say that if it's in parallel it will create a short and the set up should be in series. Hope that makes sense

  • @yaniv-nos-tubes
    @yaniv-nos-tubes 8 หลายเดือนก่อน

    a used orange vt 1000 digital tube tester is 300$, ive been using one in the last ten years it's great.

  • @JonCannings
    @JonCannings 8 หลายเดือนก่อน

    I have one of these radios and the volume seems to not be working... I would love to visit you with it, as you have experience with it and i am scared of it! Im not sure if you accept visitors?! Thanks!

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Thanks for the interest, but no thanks. I really am just doing a few radios for my collection and a couple for a good friend.

    • @JonCannings
      @JonCannings 8 หลายเดือนก่อน

      @@VintageandReclaimedElect no probs! Do you happen to know which valve is responsible for the volume? The part number, as that is the culprit for mine I think

  • @Donno308
    @Donno308 8 หลายเดือนก่อน

    Hi again. I finally got around to watching part 2 (it's been a busy week!). I agree with you about those Hunts capacitors. I now change them on sight - if they aren't faulty they soon will be. That said I think it's a good idea to re-test the radio after every one or two capacitor changes. I got lazy at one stage and started re-capping a whole chassis in one go and that was fine until the time the radio didn't work when I'd finished. Trying to back track and find out what I'd done took many frustrating hours. As I recall it was a dropped blob of solder. Anyway, I like your methodical approach. Myself, I would be happy enough to probe the voltage test points with the radio on. As you found out, it needs to warm up properly and stabilize before you check voltages. As for an RF signal generator, I got myself an old 1950's Leader sig gen for $50. I plugged it in and it worked fine. It would be a nice project to restore it though. I have since bought myself a Rigol "function generator" because the old Leader wouldn't stretch to FM frequencies but I still like the old Leader & use it for AM alignments. Speaking of which, the whistling you're hearing when tuning stations is pretty much an indication that it needs an IF alignment. Anyway I'm looking forward to seeing you design and build an amplifier or two using TV valves. Cheers

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      You are responsible for my methodical approach as I learnt form your experience. I did test every couple of capacitors and had to back track after I applied to much heat to one. I guessed the radio needed some alignment. I do now have a old valve based RF signal generator (Advance Components signal generator type D1D) to do up. It weights 10Kg but will help me if it is not too heavy to be useful. Ironically, the radio stopped that whistling after I took it back, but I have the option to go back and set up if needed. For now it is working very well.

  • @Donno308
    @Donno308 8 หลายเดือนก่อน

    This will be a great radio when it's finished. I recently restored a Bush VHF64 - the only one I have ever seen here in Australia. As we didn't het FM broadcasting here until the late 1970's, valve FM radios are a rarity here. Thanks for an enjoyable video.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Thank you for the feedback. I have been watching your channel and learning a lot. I have a Bush VHF 64 lined up for restoration. They sound great so had to get one.

  • @Donno308
    @Donno308 8 หลายเดือนก่อน

    Hi. I just discovered your channel and it looks like you will have some interesting stuff coming up so I subscribed. I agree, a dim lamp or dim bulb limiter is probably the first piece of kit you need if you're going to work on vintage electronics. I now have a variac but to be honest I only use it occasionally. I normally use a 60W globe with most vintage radios. Yes, it does drop the voltage to the set a bit initially but the degree of glow in the dim bulb gives a good visual indication of what's happening: You can see the initial surge of current as the rectifier valve starts up and the capacitors charge, see it dim off as they reach full charge and brighten up as the rest of the valves start to conduct. I still use the original one I made when I first started down the vintage radio rabbit hole and you can see it in nearly all my videos. Cheers

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Thank you for this feedback. I love hearing what people are doing. I have a variac in the process of being restored. I'm building a system for prototyping valve based projects. 3 radios to do this year and also a valve based RF signal generator. Lots to do!

    • @Donno308
      @Donno308 8 หลายเดือนก่อน

      Looking forward to seeing that. The variac restoration should be interesting and it would be nice to have a restored good quality one as opposed to the cheap chinese one I (and many others) use. The signal generator should likewise be useful. I have an old valve based Leader that I've been using for years. I've never restored it but it's still working well. Prototyping valve circuits sounds interesting: I haven't got into that yes beyond sketching out some ideas.@@VintageandReclaimedElect

  • @RJHElias
    @RJHElias 8 หลายเดือนก่อน

    Very nice, can you share the stl file please?

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 8 หลายเดือนก่อน

      Sure, you can download them here github.com/ghallberg-nbtt/dim_lamp

    • @RJHElias
      @RJHElias 8 หลายเดือนก่อน

      Tnx very much @@VintageandReclaimedElect

  • @geoffreyrobinson7031
    @geoffreyrobinson7031 9 หลายเดือนก่อน

    Well explained thanks for sharing.

  • @DadofScience
    @DadofScience 9 หลายเดือนก่อน

    Great project and something I need for my own repair work. Can't wait to see it through.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 9 หลายเดือนก่อน

      Thank you for that feedback. I am working on some add ons to improve it. Look out for those.

  • @sincerelyyours7538
    @sincerelyyours7538 9 หลายเดือนก่อน

    Thank you for this. I have been mulling over starting a YT channel of my own working with tube circuits and antique radio, but I have limited experience with both. Once I get a lab bench set up this will become my retirement project. Thanks for the clear explanation for how gm is measured. Didn't realize it was so simple.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 9 หลายเดือนก่อน

      Thank you for the comment. I have limited experience too, but I'm sharing my journey. I've learnt lots from the comments and it's good fun. Definitely go for it.

  • @rayhopcraft7922
    @rayhopcraft7922 9 หลายเดือนก่อน

    I also built Grant's tester and included my own changes. I removed the opto couplers for the meters and simply left the batteries in the two meters. I broke into this battery circuit and brought the wires out to a switch. When I use the tester I simply switch on the "meters" switch. There is no sign of the batteries dying. When they do it is a simple matter to open the case and change them. I also used a separate transformer for the heaters but included a rheostat to adjust the heater voltage to 6.3V. I haven't used the separate banana sockets but I am able to monitor various voltages via the sockets that are not in use. I have tested plenty of valves including 12A*7, 6L6, EL84, EL34,6V6, KT88 etc and have found a few with internal shorts and a few with low gm.

    • @VintageandReclaimedElect
      @VintageandReclaimedElect 9 หลายเดือนก่อน

      Thank you for the comment. I'm glad you are using Grant's design. I have some modular improvements planned for mine.

  • @VintageandReclaimedElect
    @VintageandReclaimedElect 9 หลายเดือนก่อน

    Be aware that the toroidal bolt in my build is insulated at the other end so that there is no risk of earthing both ends. If the bolt is earthed at both ends, then it will behave a s single turn winding. Although the volts will be low, the current will be high in the short circuit. This can damage the transformer.

  • @VintageandReclaimedElect
    @VintageandReclaimedElect 9 หลายเดือนก่อน

    Be aware that the toroidal bolt in my build is insulated at the other end so that there is no risk of earthing both ends. If the bolt is earthed at both ends, then it will behave a s single turn winding. Although the volts will be low, the current will be high in the short circuit. This can damage the transformer.

  • @robertedwards3147
    @robertedwards3147 9 หลายเดือนก่อน

    your final comments were eye opening that some people would ask about ht options they should stop and only use low voltage eg less than 12 volts or lower