[BC] HF &more

[John Vodenik]

I'm about to send Barry a few CD's with pictures of the
Delano antennas and transmission lines.  One of the
pix shows the 6:1 baluns we use for the 50 kW ISB
feeder transmitters.  They are rated at least 50K. 
Inside the building, we have a couple "spare" units,
rated at 20 kW.  These are about the size of a "pole
pig" transformer.

John @ VOA / Delano
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Clive Warner wrote:
> 
> > good heavens, i wonder what on earth a 100 kw ferrite balun looks like?
> >
> > rob atkinson
> 
> - Looks like a miniature version of a HV transformer, except the casing is
> aluminium and the cooling tubes replaced by heat-dissipation fins. Size,
> about 2 metres cube. Can't recall the efficiency but they are quite good.
> I do have a photo of me measuring the input Z into the balun. Unfortunately
> I haven't scanned the Niger photos yet.
> 
>