How to clean a tuner (analog)

Discussion in 'Tuners' started by dr*audio, Jan 17, 2008.

  1. dr*audio

    dr*audio Fish fingers and custard! Subscriber

    Messages:
    18,172
    Location:
    Cleveland, Ohio
    1. Vacuum out all the dust you can from the interior. Don't touch the fins on the tuning cap!

    2. Blow the dust out of the fins with compressed air. Don't touch the fins.

    3. If you examine the tuner cap, you will see brass contacts at each point where the shaft passes through the metal housing. (Including where it passes through the internal walls.) These make the ground contact and they get dirty. Buy some NON - RESIDUE contact cleaner, and inject it into all these brass contacts, then work the tuner back and forth across the dial at least 20 - 30 times.
    4. Then apply just a drop of CAIG Faderlube to each contact. It is better to use a syringe to apply it, rather than trying to spray a small amount. If you contaminate the fins of the cap or the circuitry, you will detune the circuit. Work the tuner back and forth 20 - 30 times again.
    This procedure will cure all kinds of woes; noise when you turn the dial, certain stations not being received sometimes, when other times they come in clearly, etc.
     
    Last edited: Nov 2, 2011
    Angry Possum, JEdsel, MRC1991 and 2 others like this.
  2. Hyperion

    Hyperion Roobarb & Custard Subscriber

    Messages:
    40,091
    Location:
    Hertfordshire, UK
    Thanks !

    Thank you dr*audio - this is really useful information - the number of times I read posts by people, who have just / or are about to, attempt enthusiastically "cleaning" their tuner with what seems like unsuitable materials - it's nice to have the real deal.

    Sticky ?

    John
     
    yamaha hippy likes this.
  3. dr*audio

    dr*audio Fish fingers and custard! Subscriber

    Messages:
    18,172
    Location:
    Cleveland, Ohio
    I asked to make this a sticky some time ago and nothing happened. I don't know how to go about it.
     
  4. Urizen

    Urizen Lunatic Member

    Messages:
    25,704
    I agree, this should be a sticky.:thmbsp:

    PM Punker X, the forum mod.
     
  5. riverrat

    riverrat professional camper

    Messages:
    1,719
    Location:
    Oregon
    I agree sticky this puppy!
     
  6. wiredbecker

    wiredbecker AK Subscriber Subscriber

    Messages:
    1,995
    Location:
    Albany Landfill, CA
    You rock dude. Thanks
     
  7. allentu

    allentu New Member

    Messages:
    33
    Location:
    Los Angeles, CA
    Would anyone care to post step by step along with pictures the next time you guys do some vintage tuner cleaning for all the noobs like myself?
     
    LoudInTn and yamaha hippy like this.
  8. BroonsBane

    BroonsBane raisn em up waxin em down

    Messages:
    13,593
    Location:
    Kashkabouin wannabe
    Excellent idea, pics would be great.
     
  9. jhoyt

    jhoyt Incomprehensible space llama

    Messages:
    6,577
    Location:
    Wichita-ish
    Does Deoxit D-5 qualify as a non-residual cleaner?
     
  10. Blue Shadow

    Blue Shadow I gotta get me a new title

    Messages:
    18,162
    Location:
    SE PA
    Deoxit is not a non-residue cleaner, it lubricates. The can will say non-residue if it truly is that type.
     
    yamaha hippy likes this.
  11. Punker X

    Punker X AK Subscriber Subscriber

    Messages:
    3,889
    Location:
    Panic in Detroit
    Stuck... It should be mentioned that this could bring your tuner closer into alignment, or put it out of alignment. Anyway it will affect alignment of the frontend and local osc.
     
  12. dr*audio

    dr*audio Fish fingers and custard! Subscriber

    Messages:
    18,172
    Location:
    Cleveland, Ohio
    I'll take pics of the next tuner I do and post them here.
     
  13. Renslipevol

    Renslipevol Active Member

    Messages:
    199
    I use electrical motor cleaner. Safe for plastic, zero residue, gets the plates and contacts super clean!
     
  14. LBPete

    LBPete Rolling Along Subscriber

    Messages:
    10,878
    Location:
    Long Beach, CA
    I've got one that acts like a bad ground. It is real twitchy at the low end of the dial. I started a thread with pictures in the DIY section. Is grounding the tuner shaft with a jumper a valid test?

    - Pete
     
  15. dr*audio

    dr*audio Fish fingers and custard! Subscriber

    Messages:
    18,172
    Location:
    Cleveland, Ohio
    No, work the tuner back and forth across the dial a bunch of times. If it improves, it is a dead giveaway it needs cleaning. If you suspect it needs cleaning, best to clean it. Like chicken soup, "it wouldn't hurt!"
     
  16. imready

    imready it's good to be the king!

    Messages:
    1,860
    Location:
    wy
    i'm with you rrenslipevol, quick and easy ! i very carefully use a soft paint brush and a can of air to remove dust from the area first. in fact , i'm going to go do my sansui 717(?) after i get done here!
     
    yamaha hippy likes this.
  17. LBPete

    LBPete Rolling Along Subscriber

    Messages:
    10,878
    Location:
    Long Beach, CA
    You are right again. Today it was really bad. It wouldn't tune a station with the mute on. Connecting the jumper had no affect. I when through another cleaning cycle and it got better but would drift. If I shook the tuning wheel everything would start jumping. I noticed there are also contact clips between the gangs where the shaft passes through the frame. I cleaned them and applied a little 100% deoxit and presto, it worked.

    Thanks for your original post. It was very helpful to sort this out.

    - Pete
     
    yamaha hippy likes this.
  18. dr*audio

    dr*audio Fish fingers and custard! Subscriber

    Messages:
    18,172
    Location:
    Cleveland, Ohio
    Yes, perhaps I should have clarified to look at each point the shaft passes through the frame. I'll go back and edit it. Glad I could help!
     
    Joeyho655 likes this.
  19. imready

    imready it's good to be the king!

    Messages:
    1,860
    Location:
    wy
    thanks dr audio for your post and thanks AK for making it a sticky! i have been putting off cleaning this sansui tu-717 since i bought it. it was sold to me as a drifter but it was very dirty electrically when i got it and radio here sucks so it has been ignored for about 6 years. it sounds excellent after a good cleaning . i took the sellers word for it that it needed aligned and will be listening and watching to see just how much of the reception problem was caused by dirt. thanks again! john
     
  20. imready

    imready it's good to be the king!

    Messages:
    1,860
    Location:
    wy
    it's been close to 24 hours since i cleaned my sansui tu-717. before cleaning, this unit would not maintain signal reception for more than a couple of hours and the tuning meter would indicate that signal was no longer being received at its strongest and would actually be out of the tuned in zone on the meter. after 4 1/2 hours continuous use last night and 6 1/2 hours continuous use today the tuning meter needle remain dead center and the tuner sounds marvelous, dispite my poor location. very cool !
     
    JEdsel and yamaha hippy like this.

Share This Page