[ARC5] Input impedance - BC-453-B - un-un

[Mike Feher]

You were talking about paralleling rigs. End of story - 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell, NJ, 07731

732-886-5960 

 

From: AKLDGUY . [mailto:neilb0627 at gmail.com] 
Sent: Thursday, February 05, 2015 8:01 PM
To: Mike Feher; ARC-5 List
Subject: Re: [ARC5] Input impedance - BC-453-B - un-un

 

Even that's not quite correct, Mike.

Only the transmitter that has been *selected* is connected to its

antenna terminal by the internal relay contacts, which are closed

(just like that transmitter's 1625 cathode relay contacts) even while

receiving.

This selected transmitter's output is not connected to the antenna

until the remotely mounted antenna relay changes over.

 

The so-called 'antenna relay' in the transmitter front panel only

prepares the path.

When the selected transmitter is transmitting, all the commoned

antenna terminals are live with RF.

 

73 de Neil ZL1ANM

 

 

On Fri, Feb 6, 2015 at 1:02 PM, Mike Feher <n4fs at eozinc.com> wrote:

Not exactly correct. Antenna terminals on multiple transmitters are indeed
connected together. However, only the transmitter actually transmitting is
really connected to the antenna through a relay. - 73 - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960



-----Original Message-----
From: ARC5 [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Kenneth G.
Gordon
Sent: Thursday, February 05, 2015 4:55 PM
To: ARC-5 List
Subject: Re: [ARC5] Input impedance - BC-453-B - un-un

On 6 Feb 2015 at 8:42, AKLDGUY . wrote:

> Correct me if I'm wrong, but when multiple receivers are fitted,
> aren't all the antenna terminals connected together with short wires?
> So effectively all receiver inputs are in parallel?

Correct.

The same thing is true for the transmitters...

Ken W7EKB
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