Hi,

I'd pick the second option.  I have an Ameritron als1300 and I do not 
use the keying buffer.  I do not have the alc hooked up, but having the 
alc connection available won't hurt anything.  I control my output power 
with the power output from the TS590. With my ALS1300, it takes about 40 
watts drive to give me 1 kw out and about 25 watts drive to give me 600 
watts out.

Bob, K8LR, [log in to unmask]

On 9/11/2014 1:22 PM, Dr. Ronald E. Milliman wrote:
> 		Okay, guys I went up on eBay and after considerable
> searching around trying different key words and phrases, I finally found the
> cable/connectors I need to hook-up my TS-590 with my ALS-600 amp. However, I
> have some choices, and I am asking for your recommendation. Here are my
> choices:
>
> 1.	Purchase the cable with the 7 pin Din connector on one end that goes
> into my TS-590 with a RCA phone jack on the other for switching the keying
> relays only but without the ALC line
>
> 2.	Purchase the cable with the 7 pin Din connector on one end that goes
> into my TS-590 with two RCA phone jacks on the other end for switching the
> keying relays and also to allow me to connect up the ALC line
>
> 3.	Purchase the cable with the 7 pin Din connector on one end that goes
> into my TS-590 with a RCA phone jack on the other for switching the keying
> relays only but without the ALC line, but also with the Amplifier Relay
> Buffer Keying Interface as described below.
>
> What do you suggest? The cost of just the cables without the Amplifier Relay
> Buffer Keying Interface are $15. If I include the Amplifier Relay Buffer
> Keying Interface, the cost is $55 which includes both the cable and the
> Amplifier Relay Buffer Keying Interface. The money is not an issue. It is my
> view that connecting the ALC line is not necessary and can be more of a
> problem than a solution. I also believe that I probably do not need the
> Amplifier Relay Buffer Keying Interface, but there is no downside for having
> it. What do you knowledgeable ladies and gentlemen suggest?
>
>
> Amplifier Relay Buffer Keying Interface and 7 Pin Kenwood HF TS-590
>
> We use the highest quality 7 pin Din connector... Don't risk damage t your
> radio's connector jack, use our professional series cable and connector.
> High Quality relay box to interface between your Kenwood TS590 transceiver
> and will key any amplifier. Many newer radios can only provide for a small
> amount of current on the external amplifier keyig output.
>
> Our box will draw 0.3 MA from your radio and will key any amplifier. A very
> handy accessory. Get one before you damage your radio's amplifier keying
> output!
> RCA jacks in and out. Needs 9 - 15 VDC at only 40 ma!