[MRCA] ZB-2 control box and Antenna control box questions

[Jack Antonio]

First of all. Mike Hanz's website has excerpts from the ZB-3 and 
AN/ARR-1 manual, which describes the

differences between the ZB-1,-2, -3 and AN/ARR-1.  This should answer 
your questions as to the control box

and relay box. Robert downs also has a reprint of the ZB-2 manual.The 
primary purpose of the relay box

is to switch the input of the LF/MF receiver between the antenna and the 
output of the homing adapter.

It was always my understanding that the ARB was designed to support the 
homing function, making

the control box and relay box unneccesary for the ARB.  But, that leaves 
out the LOCAL/DISTANCE function

as well as basic ON/OFF of the adapter.  The ARB has an internal relay 
to select beween the homing

(L1 and L2) and communication (AT and AF) selected by the bandswitch on 
the control box.

I set up and displayed an ARB/ATB/ZB setup at Gilbert back in 2013, 
using the proper test box as a

signal source(with the output padded down to leakage levels as it was 
still on about 246 Mc). I did

not include either the control box or relay box thinking they were 
unnecessary. And everything worked.

I have never seen an official document showing the interconnect diagram 
of the ARB and ZB, and if

there is one, I'd really like to have a copy.

Hope this helps.

Jack Antonio

WA7DIA

On 2/13/2022 11:32 AM, MARK DORNEY via MRCA wrote:
>   I’m not sure what a ZB Antenna control box and a ZB Control Box are. I think the ZB Control box is a Pilot’s Control Box CZR-23214. I have no idea what a ZB Antenna control box is. All help is appreciated.
>