[1000mp] ARB-704 and Yaesu Mark V

[Art Searle W2NRA]

Hi,

According to the MrkV Field manual for non-QSK switching: 

MrkV Field manual page 14: With the relay now enabled, the MARK-V FT-1000MP
Field can support non-QSK linear T/R switching voltages up to 100 VAC @ 500
mA, or DC voltage up to 60 V @ 200 mA, or closed-circuit current up to 1 A
with DC voltage up to 30 V.

and in my Ameritron AL-800 manual:

AL-800 manual page 5: Relay:
Requires contact closure or sink of +12 Vdc at 100 mA. Back pulse protected.

This seems well with specs, right?

73 Art W2NRA
 

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of Pete Smith
Sent: Tuesday, November 28, 2006 01:37 PM
To: All about Yaesu 1000mp
Subject: Re: [1000mp] ARB-704 and Yaesu Mark V

Well, you could always RTFM, but why spoil your fun?  The info on this is on
page 12 of the Mk5 manual, but the short answer is that you can indeed
damage the radio - though perhaps not with the AL-80B.  

73, Pete N4ZR

At 12:41 PM 11/28/2006, you wrote:
>Why you need the ARB-704
>
> 
>
>Amplifiers can damage radios if the amplifier has too much relay control
>voltage, voltage spikes, or excessive current on the relay control line.
>Such damage often appears as "stuck" or "sticky" transmit relays in
exciters
>or shorted transistors on transmit control lines. In most cases where the
>radio is damaged, the system transmits normally but the external amplifier
>stays locked in a "transmit" mode. This prevents receive signals from
coming
>through the amplifier with normal levels whenever the amplifier is in the
>"ON" or "OPERATE" position.
>
> 
>
>Above is the reason I have placed the ARB-704 between my Yaesu Mark V and
my
>AL-80B.  However I was told that the Yaesu Mark V will not allow this type
>of damage to occur and my having the buffer between the rig and the amp is
>overkill.  What is the real true?
>
> 
>
> 
>
> 
>
> 
>
>
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