All the Kenwoods that use the large 7 pin din get the 12 vdc offf pin 7. 
   They even warn against using external power and power from the radio 
at the same time.

I think the only 7 pin din Kenwoods that need external power are the 430 
and 530.

73, Steve KW3A


On 8/29/2014 4:49 PM, Butch Bussen wrote:
> I don't believe it takes its power from the 590, at least mine does not.
>    I think it is the tipical coax plug or whatever you call those things,
> centr positive, shell ground.  I think it is worth while, just to
> protect the relay contacts in the rig.
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.
>
>
> On Fri, 29 Aug 2014, Dave Basden
> wrote:
>
>> I used one with my TS-480, but haven't gotten it set up with my
>> TS-590 yet.  I did get the cable to do that though.  It's probably
>> not necessary with even a relatively new amplifier design and my
>> Fl-2100F is over 30 years old now, but it is convenient.  It avoids
>> wiring your own plug to attach to the radio.  As I recall, it takes
>> it's power from the TS-590, so an external power source is
>> unnecessary, but I could be remembering that wrong.
>>
>> 73,
>>
>> Dave, W7OQ
>>
>> At 07:47 AM 8/29/2014, you wrote:
>>> Are any of you guys on the list using the Ameritron ARB 704 relay buffer
>>> between your radio and amplifier and if so how do you like it?  If you are
>>> using the ARB 704, how do you power it.I have one that I have had for
>>> several years and I have lost the wire that I think powers the ARB 704.  I
>>> am trying to find out about it so I know if I need for Ameritron to send me
>>> a new one or if I can get one made up.  I would like to use this relay with
>>> my bedroom radio.  I will appreciate any suggestions on this.
>>>
>>> Thanks much,
>>
>>
>
>
>