[Elecraft] Microham Station Master Inhibit -> K3 ?

[Edward R Cole]

Marco,

I use a LM7805 voltage regulator to provide inhibit voltage to my K3 
(accessory pin-7).  Since I use a sequencer it defeats the inhibit 
voltage to enable transmit by grounding the voltage regulator thru a 
1K current limiting resistor.  But the simple voltage divider concept 
looks fine and may operate faster if you use QSK.

You stated that Station Master provided +13v when inhibit is 
active.  If so the proper setting in the K3 menu should be INH = 
HI.  You are telling the K3 what level it should see when inhibited.

I cannot offer any advice for the SteppIR; I'm using a 30-year old 
Hygain TH3mk4.

73, Ed - KL7UW


Hello,

I'm optimizing the shack setup and taking a more careful look at hot 
switching; Antenna switching is managed through a couple of Microham 
Station Masters, which provide an Inhibit Output as cinch connector. 
So Inhibit will be set during any Antenna transtition to protect the 
switches, the PA etc.

According to the Microham manual this output is provided to be 
connected to Yaesu, TenTec and Elecraft transceivers; I was tempted 
to plug it directly into my K3, but I decided to measure the voltage 
on the Station Master's Inhibit out connector: it's 13V.

Question 1: Is that voltage OK to be connected to the Inhibit pin in 
the K3's ACC connector ?
I prefer to ask before doing it.

Question 2: I assume Station Master's Inhibit is active when this 
signal goes to 0V, so K3's TX INH configuration shall be LO=INH. 
Anyone has experience ?

Question 3: Station Master is controlling a SteppIR antenna: does 
Inhibit activate during the antenna tuning procedures ?

Thanks

Marco, HB9CAT


73, Ed - KL7UW
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