[Elecraft] KPA1500 / ICOM CI-V / BCD question

[Dick Dievendorff]

I’ve never done this myself, but my understanding is that CI-V is a multipoint protocol.  I have an Icom CT-17 level shifter into four concurrent CI-V lines that are just paralleled, all at the same baud rate. You can do this less expensively with a few 3.5mm sockets wired in parallel.  See the CT-17 manual and circuit diagram. 

CIV is preferable to band lines in that the Icom exciter can provide freq info, not just band, and the KOA1500 ATU can preselect a setting before transmit.

73 de Dick, K6KR

> On Jun 27, 2021, at 12:06, Kelly Jones <kjones at virtualcohesion.com> wrote:
> 
> I have been kicking around the idea of purchasing a KPA1500.  In doing my due diligence, I've stumbled upon a dilemma.  It appears the KPA1500 will track bands for ICOM using CI-V.  I am currently using CI-V to auto switch antennas, so that ties up the radio's CI-V port.  The antenna box (Bandmaster V) is using BCD to control the relays at the box (RCS-10).  It seems the KPA1500 supports band control via BCD.
> 
> My question - can I parallel connect the BCD outputs from the Bandmaster V to both the relay box AND the KPA1500?  Or alternatively, parallel the output the ICOM's CI-V port?
> 
> 73
> Kelly - N0VD
> 
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