Topband: Feeding multiple beverages

[Maurizio Panicara]

Hi Uli,

there is no practical problem, as I measured a similar setup, in doing what
you do.
One beverage transformer, one ground, one line and simple remote switch of
the beverages wires, wires diverting @ 60° each 6ft from ground.
The coupling between the floating wires and the used beverage is neglectable
and 6 relays of normal quality by far do not show unacceptable crosstalk at
2 Mhz even at 450 Ohm.
If one has datas that say the opposite (read of a poor isolation, better if
expressed in dB), explainations (i.e. what's the useful practical coupling
between standard diverting beverages, again in dB) and how they measure,
please share it.

73,
Mauri I4JMY




> wouldn't using just ONE transformer and switching the ends of the
different
> Beverages to (the hot end of) its secondary (leaving the other Bevs
> floating) avoid any common ground problem???
> as I understand it,  to avoid common ground cross talk when switching the
> coax line to the primaries you must use separate grounds for each
> Beverage... if so, how far should they be from each other to safeguard
> sufficient decoupling???
> or do I misunderstand the passage above altogether???
> greetings from germany
>
> Uli, DJ2YA