AM Radio question on thumb wheels

[69]

Hi guys,

My AM is still working (including the preset mechanics, pretty darn clever design), but the tune thumb wheel does not have enough "grip" on its axle (red, on both pics) to move the tune-slide (yellowish on the first pic). It slips at the red markup on pic 2 (!). On pic 1 all mechanics work fine.

I suspect that either
- the slipping on pic 2 is not as designed. That would result in the thumbwheel does stop at high and low end. I could fix the problem with a little bit of superglue.
or
- the slipping is as designed but overall smooth-running of the mechanics is impaired. This would result in thumbwheel can still be moved even though high/low end is reached. To fix, I'd need to do more work on the smooth-running of the tune mechanics.

Therefore, I'd like to know how your AMs are operating at the end of the tune area. Can you still move the thumbwheel (e.g. slipping is a feature) or is the thumbwheel stopped at the end (e.g. slipping is a bug)?

THANKS A LOT!!

[tan top]

 think it just stops the wheel wont go any more , but cant remember for sure      will go & check later 

[nascarxx29]

About the only thing I remember playing with my AM that wouldnt change stations.There was a tension screw .And turning it got the thumbwheel going again

[69]

think it just stops the wheel wont go any more , but cant remember for sure      will go & check later 

Appreciate your input very much! 

[twodko]

The freq indicator in my AM radio is stuck at the high end and won't come back. Same issue as yours but the radio works fine.

[69]

The freq indicator in my AM radio is stuck at the high end and won't come back. Same issue as yours but the radio works fine.

You are also still able to turn the tune thumb wheel and nothing happens? Maybe I need to take a look with some better glasses  to find a tiny screw as mentioned above...
But only after Sunday. Big cruise and meet... 

[Rolling_Thunder]

I just checked mine -  it continues to turn even at the high and low scales...   so it is supposed to slide on that shaft...     

[69]

I just checked mine -  it continues to turn even at the high and low scales...   so it is supposed to slide on that shaft...     

Thx a lot! Although that means that I need to re-lube the whole assembly of the tune mech.... 

[tan top]

I just checked mine -  it continues to turn even at the high and low scales...   so it is supposed to slide on that shaft...      

tried mine !! looks like i remembered it wrong    ,

  you can wind the  frequency indicator just past the 5 then it stops , but you can still turn the wheel , but it feels slightly different , like its on a clutch & its slipping
hope this helps  

[nascarxx29]

Its like a little clutch with a brass colored pressure plate .And could have sworn when I fixed mine.I increased tension to fix selector and indicator needle not moving

[69]

Thanks to all trying their thumbwheel.

Accordingly, the slipping at the end (thumbwheel to be turned with more force) is the desired behaviour.

In respect of the pics above, my radio is actually not slipping at the brass clutch (upper pic, marked red; this is needed for the preset-mechanics), but at the lower picture, directly at the thumbwheel itself.

Now, if anyone has, by any chance, his AM radio open? 

Sorry for being fussy...

[Rolling_Thunder]

mine is sitting in my shed - not in the car...    what do you need buddy ?

[69]

I need to know if the thumbwheel, when at the end past 5 or 16 is slipping at the big brass-like clutch (pic 1 from top) or at the bevel pinion (pic 2 from front).

THx.

[Rolling_Thunder]

When the adjustments are topped out - the brass clutch looking deal slips on the shaft it is riding on...       

[69]

Thanks a lot!!! 

Now I know what to fix with my AM.

[Rolling_Thunder]

no problem buddy