Wonder if those  having this problem have the USB connected to the 590, 
and  what happens if it is unplugged?

Probably not related to the issue, but who knows.

73, Steve  KW3A

On 11/1/2015 11:51 PM, howard kaufman wrote:
> I have faroid chokes on the cables.  Who knows maybe taking them off may
> help.
> It gets curiouser and curiouser.
> I get 82 watts out according to the lg1 watt meter with a 1.2 SWR.
> With the ts-590.  I put that alone on the supply, tightened down the nuts
> and with it alone I got a reading of 45 watts out with the same SWR.
> Hooked up both cords, tightened down the nuts again and its back to 82 watts
> out.
> Something very funny is going on.
> I'll get the DC volt meter out another day.
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Tom Fowle
> Sent: Sunday, November 01, 2015 10:48 PM
> To: [log in to unmask]
> Subject: Re: tmv-71 issue
>
> That's a weird one!
> did you say you'd put ferite chokes on the cables? If not and you have
> snap-on chokes about, might be worth a try.
>
> Can't be a voltage issue or the 590 wouldn't work. Kinda has to be R.F.
> "It says here!" <GRIN>
>
> Tom WA6IVG
>
> On Sun, Nov 01, 2015 at 10:33:06PM -0600, howard kaufman wrote:
>> Okay boys and girls, rather than listen to the end of that disaster in
>> Denver, I disconnected the ts-590 from the power supply.
>>
>> The problem went away.  Now why and what to do?
>>
>> The problem stayed with the 590 turned off, and was still there when I
>> disconnected the power cord from the ts-590.
>>
>> I had to physically disconnect the wires from the 590 for the problem
>> to go away.
>>
>> Head in hands, rench on floor.
>>
>>
>>
>>
>>
>> Howard Kaufman MSW LCSW
>>
>>
>