[Milsurplus] Coax (72/75 Ohm twinax) for sale

[Michael Tauson]

On Wed, Oct 14, 2009 at 4:39 PM, D C *Mac* Macdonald <k2gkk at hotmail.com> wrote:
> I would respectvely suggest that 75 Ohm transmitting
> twinlead (if even still available) would be a far better
> feedline.  I don't have tables immediately available, but
> am pretty certain that the twinax cable would surely
> be considerably more lossy than the 75 Ohm twinlead,
> especially under VSWR conditions much removed from flat.

> My suggestion would be to use a 1:1 balun from 50 Ohm
> coax to the 72 Ohm twinax and tie the twinax shield to
> the common ground post of the balun.

Okay, I was asking out of curiosity and appreciate the response.

> It seems a bit of overkill to me unless there is a specific
> reason for using shielded feedline.

The only reason I can think of is not being able to find 75 ohm
twinlead as you mentioned.

Many thanks for your response.

Best regards,

Michael, WH7HG
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