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!