[Boatanchors] Transformer Question

[WQ9E at btsnetworks.net]

Keith,

The grommets suggested by another poster should help quite a bit and you may also want to put additional rubber isolators between the supply and your enclosure.

Also be aware that some household appliances put a lot of garbage on the AC line which will increase transformer noise.  Several years ago I bought one of the ceramic disc heaters and when it is set at its lower output setting you could hear a strong buzz coming from transformers in my vintage radios.  I returned the heater.  

Rodger WQ9E

-------- Original Message --------
> From: "Keith Densmore" <ve3gem at gmail.com>
> Sent: Wednesday, October 16, 2013 12:00 AM
> To: boatanchors at mailman.qth.net
> Subject: [Boatanchors] Transformer Question
> 
> Hi Group,
> A question about transformer hum.
> I have a HP 23 supply which has a slight hum coming from the power 
> transformer.
> Not objectionable if mounted on the floor but I have it installed in a 
> custom metal enclosure and I do not like the extra noise.
> 
> Is there a cure for this? Or is a slight hum a normal aging effect on these 
> older units?
> 
> Thanks, 73,
> Keith, ve3ts 
> 
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