On Tuesday, December 01, 2015 11:23:09 you wrote:

> Yes, there are plenty of options for normal Tx/Rx. In fact the

> existing C/O relay in the 137 transmitter provides more than enough

> isolation for that

>

> But I was on a separate active whip at the time, a quite independent

> conenction and irrelevent to real operation at the time. It was the

> fact that the active whip could shove out such an alarmingly high

> level that concerned me - 13V very sharp spikes. And I forgot to

> mention in the previous post, those 13V edge spikes went to both +13V

> and -13V, so technically 26Vp-p

>

> Perhaps the homebrew designs others use aren't so robust in their output

> stages?

>

For sharp spikes coming out from the cable I suggest some ferrite bead or a VK200 choke on the receiver input. I believe they have no attenuation at LF frequency.

73 de Claudio ik2pii

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Claudio Pozzi - rispondere a [email protected]

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