J5 question

[oe9fwv]

I plan to install a digital in/output in my K2. I was lucky and found a no
more used EA3BLQ digital interface. In the manual I found two ways to get
AF into the interface. One is from the digital  audio filter and the other
from the RF board J5. As I do mainly Pactor with a Ptc-2 the better way
seems to me to bypass the audio filter and get the Aux AF from J5.
Is this correct? I don't want digital signal processing on the signal to
the Ptc-2. The only thing I need is a 500 Hz bandpass filter for Pactor 2.

I am not very savvy in electronics so I thought I better ask here before I
do something stupid.

According to the circuit diagram from EA3BLQ I can use Pin 1 and 3 from J5
to connect the digital interface to the K2.
This interface seems to be exactly what I need - automatic switching off a
eventually connected microphone is a very nice feature which I miss in mny
other radios except the Kenwood TS440.

btw, thanks for the input on my microphone question regarding the SM-8.
all clear now.

73! de Werner OE9FWV



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