Radio valve problem ?

  1. angellonewolf

    angellonewolf Member

    Messages:
    3,964
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    bristol england
    Ok details other half father bought a older radio 20190711_193817.jpg

    Plug in to the mains nothing

    Took it apart seams to be power going to where it needs it but nothing not that I know ,much about old valve radios but I know the valves how do I test them or is it just buy and try ?

    Pics of the valves 20190709_090352.jpg 20190711_193814.jpg

    Thanks for any help
     
  2. Olderisbetter, ronan and Hopefuldave like this.
  3. angellonewolf

    angellonewolf Member

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    only posted on here as this is my first port of call for most stuff and as ive seen memy of people fixing old music equpment thought thy may have a few pointers as it could be some thing eassy ive over looked
     
  4. Windy Miller Forum Supporter

    Messages:
    2,611
    Kent, UK
    Are all the valves glowing when you power it up? That’s what I’d check first, but it’s been 40 odd years since I did anything with valves
     
  5. It is generally down to ageing capacitors from what I have gleaned. In particular, some sets have capacitors that are change on sight. Have a word on there, but watch out for the moderators. They make the SS look like a playgroup!
     
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  6. angellonewolf

    angellonewolf Member

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    thats why i post on here unless its about politics that locks threads qute quick
     
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  7. eddie49 Member

    That radio is a suitcase portable. It can run on two batteries ( low tension 1.5v, high tension maybe 90v ), The plugs for the batteries are wrapped in that plastic bag. It is also mains-capable, probably with what was known as a "battery eliminator" power supply, but this one is built-in.
    https://www.6v6.co.uk/index.php?seo_path=power-supplies/90-volt-battery-eliminator
    To switch on using mains, you need to turn the power and wave-band switch anti-clockwise ( clockwise for battery operation ).
    If this does not fix it, please post some photos of the circuitry around where the mains cable enters the radio cabinet.
     
  8. rtbcomp

    rtbcomp Moderator Staff Member

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    Sheffield UK
    +1 for capacitors, but get the valves glowing first!

    I've repaired my Deccalian gramophone and my Alpha FA-600 amp by changing electrolytics.
     
  9. angellonewolf

    angellonewolf Member

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    15628746511213889548587027730340.jpg 15628746692773270211349425051245.jpg 15628746869688278069115022547216.jpg will have a look under neath
     
  10. RonA

    RonA specialist in repairing sealed for life equipment

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    Generally, fixing radios of that age, involves following the signal from tuner circuitry through to the amplification. A signal injector can be very useful. Capacitors are prime candidates for failing before valves. Also need to check the valves are all getting LT supplies to the heater usually about 6.3V if my memory serves well. If its dual mains batteries beware of open mains connectors especially if it has a valve rectifier
    RonA
     
  11. angellonewolf

    angellonewolf Member

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    15628747733452569913446143451740.jpg
     
  12. Robotstar5

    Robotstar5 Casanunda Staff Member

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    I remember the old man having one of those, only ever used it on batteries to take on camping trips. When it failed he gutted the case and re-purposed it as a first aid box :D
     
    ronan likes this.
  13. voipio Member

    Messages:
    638
    Cambridge, UK
    As RonA suggested, follow the signal through, though it might be easier to start with the audio stage and work back up the signal chain. Does the speaker make any sound whenthe radio is powered? Are there any crackles when the volume control is moved? A circuit diagram is always helpful.
     
  14. ronan

    ronan Member

    Messages:
    8,366
    dublin
    I heard people are collecting valve radios now and their value is going up a bit, certainly the earlier ones. I have a couple myself, my grandmothers old Pye and a Philips i picked up at a market. But if people are willing to fork out for them, there must be someone repairing them. Ask @Farside, he is into radio.
     
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  15. eddie49 Member

    The picture in Post number 11 shows that one of the valve heaters is lit up correctly. All of the valves have to glow like that, and then we have to figure out where to check the high tension ( HT ) on the valve anodes. However, the first picture on Post number 9 shows an empty hole in the chassis with three black wires, with small spring clips on the ends, not connected anywhere. Those clips were often used to connect to pins set in glass tubes - e.g. valve pins. I think that there is a component missing there.
     
  16. Farside

    Farside Badly Welded Man

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    Oh, I dunno. At the moment I'm re-learning a lot of stuff I forgot about valve sets, but I'm nowhere near competent enough to take a stab at something I've no familiarity with at all. That set is strange to me and I know nothing about it.
    Right now, I'm at Sets 3 Repairs 0
    Bought a lovely old Pam TR30 which actually crackles and works after a fashion, but put that on the back of the pile until I get more time in on sets which are much more commonly covered on the vintage radio forum.
    To that end I acquired a Fenman II (not a cheep out of it) and a Hacker Mayflower II which was working fine, but after a short time of operation the vital THAT Capacitor (term beloved of vintageradio forum) blew up. Serves me right for not changing it on sight, as said above.
    Anyway, will be practicing on these before I venture any opinions on anything else.
     
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  17. angellonewolf

    angellonewolf Member

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    sorry for late replys been with a mate tonight for a beer

    no no noise but after powering on did not work or light up but when putting back in to the case the speaker was making some static noise but imnot sure if its a loose connector or a wire touching was not pluged in

    follow the siganl through need to have a look at this to see how to do this
     
  18. angellonewolf

    angellonewolf Member

    Messages:
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    the father only bought it as a display item i was just asked to look over it to see it was something silly

    now i can do a bit of soldering but i need to know what parts to test and what to replace
     
    ronan likes this.
  19. angellonewolf

    angellonewolf Member

    Messages:
    3,964
    Location:
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    can you post apic with an arrow so i know what to look at

    if your talking about the black wires on the first pics on the left they attach to the case ive had to remove them to take it out the case
     
  20. angellonewolf

    angellonewolf Member

    Messages:
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    and only the one valve seams to light up
     
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