Tom,

If you still have a 480 in the RV, it has the same molex  end as the 590.

What SWR are you showing on both the 590's SWR meter and the TW-1?  I 
find the TW-1 to be less than totally reliable.

After tinkering and changing cables,  you may get to a point where it is 
just easier to  try a reset.   If you have the Kenwood software running, 
you can back-up, reset, and restore your settings in less than 10 
minutes.  If it solves the problem, great.   If not, you concentrate on 
  other things.   While it is always possible it may need service, 
usually this stuff  turns out to be pilot error, bad metering, or some 
other   piece of gear in the  system that has gone flukey.
73, Steve KW3A


On 12/10/2012 10:26 PM, Howard, W A 9 Y B W wrote:
> Tom,
>
> The power cables are not the same for the 570 and 590.
>
> Howard #3
>
> ----- Original Message -----
> From: "Tom Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, December 10, 2012 9:21 PM
> Subject: Re: TS590 Output Power again
>
>
>> Steve:
>>
>> I checked all the usual suspects as you listed, but did not check the
>> carrier level.
>>
>> I can't imagine how it might have changed, but you never know.
>>
>> Also, I can  swap out rig power cables between the TS590 and TS570, just
>> to
>> see if that would make a difference, and will do that tomorrow night.
>>
>> Auto tuner was off during entire process, and manual tuner was in bypass
>> mode.
>>
>> 73 from Tom Behler: KB8TYJ
>>
>> ----- Original Message -----
>> From: "Steve Forst" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Monday, December 10, 2012 9:56 PM
>> Subject: Re: TS590 Output Power again
>>
>>
>>> The 590 is rated at 100 watts FSK, as well as CW, so keying in one  mode
>>> is no harder on the rig than the other .  Of course if you were doing
>>> super long  RTTY transmissions, you might want to back it down a bit,
>>> but the radio won't  fold back power just because you are in FSK mode.
>>>
>>> You need to check the usual suspects:  auto tuner off, external tuner
>>> either out of circuit or in bypass mode, known good jumper between radio
>>> and dummy load, known good power cable and good connections.
>>>
>>> Did this just happen?   Did you maybe change the carrier level by
>>> mistake ?  Carrier level is  press and hold the mic gain key.  If set
>>> too low, both FSK and CW power will be down.  Default is 50,  but you
>>> probably need to get lower than 20 to see a real drop in power.
>>>
>>> 73, Steve KW3A
>>>
>>>
>>>
>>>
>>> On 12/10/2012 9:45 PM, Phil ote:
>>>> Tom,
>>>>
>>>> First, what's your reflected power.  Second, I don't own that radio but
>>>> your
>>>> rig my be auto tuning the power down because you are testing it in the
>>>> RTTY
>>>> mode which doesn't want to run at 100 watts continuous duty cycle.  That
>>>> happens to me in the AM mode checking power out.  A CW carrier works the
>>>> best.
>>>>
>>>> Phil.
>>>>
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: "Tom Behler" <[log in to unmask]>
>>>> To: <[log in to unmask]>
>>>> Sent: Monday, December 10, 2012 6:56 PM
>>>> Subject: TS590 Output Power again
>>>>
>>>>
>>>>> Hi, all.
>>>>>
>>>>> I know this issue has come up several times already in different forms.
>>>>> In
>>>>> fact, I'm the one who brought it up once when I feared that my Astron
>>>>> RS35
>>>>> power supply was beginning to fail.  So please bare with me as I raise
>>>>> the
>>>>> question of TS590 output power again.
>>>>>
>>>>> It seems that my TS590 is intent on only putting out about 70 watts
>>>>> output,
>>>>> even when the power output control is set at 100 watts.  In fact,
>>>>> interestingly, if I use the output power meter on the TS590, the output
>>>>> power reading given when I go beyond the 50 watt setting constantly
>>>>> sticks
>>>>> at 75 watts, whether I'm at a 55 watt setting, or a 100-watt setting.
>>>>> Readings are similar with my TW1.
>>>>>
>>>>> I've done this testing with two different power supplies, and with both
>>>>> a
>>>>> resonant antenna, and a dummy load.
>>>>>
>>>>> I'm taking my output power readings by setting the rig to RTTY mode,
>>>>> and
>>>>> pushing the push-to-talk button on my Heil Gold Line mic.
>>>>>
>>>>> Am I doing something wrong here?
>>>>>
>>>>> Is there a better way to measure output power with the TS590?
>>>>>
>>>>> Thanks and 73 from Tom Behler: KB8TYJ
>>>>>
>>>>
>>>>
>>>>
>>>
>
>
>