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Does the weather affect FM pre-sets?

Discussion in 'Tuners' started by brian222, Oct 30, 2018.

  1. brian222

    brian222 AK Subscriber Subscriber

    Messages:
    1,555
    Location:
    Gladwin, Mi.
    All summer I'd lock in 4 stations. Next day all are gone. This month loaded same 4 about 3 weeks ago and this morning all are there.
     
    swamppirate likes this.

     

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  2. WobblySam

    WobblySam Well-Known Member

    Messages:
    584
    Location:
    Middle of NC
    I'm not a 100% sure about what you are asking. Yes, weather can and will affect your RECEPTION of those 4 stations. If you're saying your tuner dumped the presets, then NO, weather is not an issue - unless you had a power blip during a storm and your tuner lost them due to that.
     
  3. brian222

    brian222 AK Subscriber Subscriber

    Messages:
    1,555
    Location:
    Gladwin, Mi.
    Yes it dumped them in summer. Not in October. No power outage. Thanks.
     
  4. swamppirate

    swamppirate Addicted Member

    Messages:
    9,472
    Location:
    Sweet Virginia Breeze
    Yes. Although what you are describing seems backwards. Usually in the fall/winter reception tends to be BETTER due to less leaf coverage and lower humidity etc....
     
  5. Bob@FM

    Bob@FM Active Member

    Messages:
    358
    Location:
    NE NY
    Some tuners use batteries (rechargable or not), other big capacitors, other static RAM to store the stations.
    What is the tuner?

    Dumping stations depending on weather could mean it is related to humidity. Or maybe it is on the way out (battery or capacitor) and responds to temperature.
     
  6. sKiZo

    sKiZo Hates received: 8642 Subscriber

    Not unusual for a tuner to drift some, and sometimes difficult to say why. I'd think that's the issue with all the stations drifting, especially if they all drift the same amount up or down ...

    I know that it's been an interesting couple months up here in the great white, with 80+F one day, and tickling freezing the next.
     

     

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  7. brian222

    brian222 AK Subscriber Subscriber

    Messages:
    1,555
    Location:
    Gladwin, Mi.
    Teac AG360.
     
  8. brian222

    brian222 AK Subscriber Subscriber

    Messages:
    1,555
    Location:
    Gladwin, Mi.
    There is no drifting. I put a station in using the memory button. Next day it's not there.
     
  9. sKiZo

    sKiZo Hates received: 8642 Subscriber

    OK then ... maybe a bad backup battery. Some equipment uses a capacitive battery built into the board for that, and they can be kinda hard to spot. Time to like, read the book?

    Example - here's one on my EQ (ON1) ... devil of a time figuring out why it wouldn't store programs ...

    [​IMG]

    It would work for a while if I used it regularly, but drain fast if I let it go for a week or so without turning it on.
     
  10. I LIKE MUSIC

    I LIKE MUSIC Super Member

    From the service manual...

    Vdd2 is the RAM data back up power input. It appears that C505 is the backup capacitor. Monitor the voltage at the cathode end of D521 with the power on and then off. It should stay about the same.

    upload_2018-10-31_19-39-59.png
     
    musichal likes this.

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