[time-nuts] altinex switches

paul swed paulswedb at gmail.com
Thu Feb 21 16:19:42 EST 2013


Good point Bob the 75 ohms are smaller in diameter. I use 75 ohm connectors.
The 50 into a 75 hole spreads the jack.
Regards
Paul
WB8TSL

On Thu, Feb 21, 2013 at 4:16 PM, Bob Camp <lists at rtty.us> wrote:

> Hi
>
> Be careful with the BNC connectors on those switches. 75 ohm BNC's aren't
> the same as 50 ohm connectors. The inner contact is different enough that
> they don't always play well together.
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Arthur Dent
> Sent: Thursday, February 21, 2013 3:57 PM
> To: time-nuts at febo.com
> Subject: [time-nuts] altinex switches
>
>
> I haven't looked any further but the daughter boards
> in the unit have 75 ohm resistors which I'm guessing
> determines the input/output impedance of the unit.
> If that's the case it should be easy to switch it to 50
> ohms although it may not make any real difference.
>
> -Arthur
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