[GreenKeys] CV-89 Connectors

[Nick England]

Note that the CV-89, like most tube-type converters is loop polarity
sensitive. The output is a pair of switching tubes that conduct POSITIVE
voltage to ground for marking. So your loop MINUS supply must be grounded.
You can't just stick this converter anywhere in the loop like many solid
state designs (which have opto-isolated switching transistors in a diode
bridge).

Nick England K4NYW
www.navy-radio.com

On Tue, May 2, 2017 at 10:43 AM, JC White <jcw1231 at pacbell.net> wrote:

> No, it does NOT provide loop currrent, just a pair of parallel keyer tubes
> to open and close the loop...
>
> I just changed connectors rather than try to find mates for the
> originals...
>
> Have the manual around here somewhere...
>
>
> John
> WB6BLV
>
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