[Elecraft] Astron hum/vibration

[Bill Harris]

I like the "putting your hand on top" method. Cheap and not as messy.BillHarris-w7kxb

> From: daleputnam at hotmail.com
> To: n4lq at carolina.rr.com; w2up at comcast.net; elecraft at mailman.qth.net
> Date: Tue, 17 May 2011 13:05:56 -0600
> Subject: Re: [Elecraft] Astron hum/vibration
> 
> 
> I've not repaired a high current xfrmr, like that one, but have the lower current ones... 
> With hum that is physical, and a vibration, that maybe caused by the varnish breaking its hold 
> and letting the individual windings rattle. 
>   I may have just been lucky too... all I did was take the transformer shells off, exposed windings are now very visible, although only the top winding... and a cheap wager would be that it isn't the top one rattling... then very slowly pour new vanish onto the windings.
> Let it settle some, and add more.. yep,.. it is messy... very messy.. not something you'd want to do on carpet... or cement... or in a sink... trust me here... and that is another story.. really. 
>   Let it settle in,.. add more.. when it seems to not want to do anywhere, but on your shoes... maybe now would be a good time to stop. 
>   Let in air dry... for a long...long ... long.. time. well... ok.. tomorrow then. (24 hours.... it is always tomorrow somewhere)
> Put it all together... and hum.. away... well.. hopefully at least, it is away. 
> Have a great day, 
> 
> --... ...-- Dale - WC7S in Wy