[1000mp] ARB-704 and Yaesu Mark V

[Pete Smith]

The Field's specs evidently are different than those of the straight Mk 5.

73, Pete N4ZR

At 08:12 PM 11/28/2006, Art Searle W2NRA wrote:
>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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