Afternoon all ,?
Checking my understanding of a perceived challenge here with you all:
before buying the bits and prototyping a cable...?
It seems that plugging the 847's rear 3.5mm data jack into anything with audio isolation transformers
at the far end (thereby effectively dc grounding the tip of the 3.5mm plug) forces the rig into
constant TX irrespective of any remote PTT settings (correct?)?
And therefore, interfaces like the SCU-17 which feature such isolation, require something like a 10nF
blocking cap (depicted as C-BLOCK --||-- below) like (hope this scales) :
RIG END? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? PC INTERFACE END
? ? ? ? ? ?|----------------------------------------|
TIP |RING|EARTH|------------------|EARTH|RING|TIP|
?|----------------------||-----------------------------|
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?C-BLOCK
inline to stop this constant PTT (correct?)?
is there any other way (I cannot see one in the menu?) to disable that data port PTT without rig surgery ?
many thanks and 73 de
'CQU
