Lou:
The 590 does indeed have in line fuses. They are the flat auto-type fuses,
and I believe they are rated at 25 amps.
My first step will be to take voltage readings on the power cord to the
radio as others suggested, and will go from there.
Hopefully, I'll get lucky, and my voltage will be ok there.
Then, it will just be a matter of trying to find out where my voltage drop
is by removing and then re-installing various pieces of equipment in my
station.
If my initial voltage is not 13.8 via this method, then I may have to look
at my power supply.
In saying all of this, I fully realize that a 10 watt power reduction isn't
really going to mean anything in the end, but it would be good to know that
the rig can deliver the 100 watts maximum output power if needed.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "Lou Kolb" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, June 25, 2011 8:07 AM
Subject: Re: Low Output Power
Tom,
Usually, you have to take apart the fuse holder, sometimes a difficult job
depending on how they are designed, and clean both the fuse ends and the
contact pieces in the holder. I imagine denatured alcohol, such as we used
to use to clean tape heads, would work, and sometimes just a good brisk
rubbing with a cloth will do it. When nothing else was available, I've even
been known to use a shirt sleeve. You'll probably get more expert opinions
on this from others on the list but I've been burned by it in the past with
the TS-440 so thought I'd throw it out there. I don't know if the 590 has
in-line fuses or not. The K3 does not have them. Good luck. Lou WA3MIX
----- Original Message -----
From: "tom behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, June 25, 2011 8:01 AM
Subject: Re: Low Output Power
> Lou:
>
> What's the best and safest way to deal with that issue?
>
> 73 from Tom Behler: KB8TYJ
>
> ----- Original Message -----
> From: "Lou Kolb" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, June 25, 2011 6:36 AM
> Subject: Re: Low Output Power
>
>
> Also, beware of in-line fuse holders. They can carbonize and cause all
> kinds of issues with voltage drop. Lou -- WA3MIX
> ----- Original Message -----
> From: "tom behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, June 24, 2011 9:31 PM
> Subject: Re: Low Output Power
>
>
>> These are great suggestions, Mike.
>>
>> Thanks so much.
>>
>> Will give them a try.
>>
>> What would you suggest cleaning the lead terminals and power supply lugs
>> with?
>>
>> 73 from Tom Behler: KB8TYJ
>>
>> ----- Original Message -----
>> From: "Mike Duke, K5XU" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, June 24, 2011 9:26 PM
>> Subject: Low Output Power
>>
>>
>> I recently had a similar problem with one of my TS570's.
>>
>> The problem turned out to be an apparently dirty connection between
>> the power cable and my Astron 35, which caused a voltage drop at the
>> radio end of the cable.
>>
>> Cleaning both the power supply terminal bolts, and the ring lugs on
>> the power cable solved the problem.
>>
>> The output went from 70 watts to 98 as measured by the TW1.
>>
>> Someone with a multi meter can confirm the voltage as it appears on
>> the terminal bolts. The voltage can also be checked on the radio end
>> of the cable, where it is normal to see a slight drop, but not the 3/4
>> of a volt drop that I was seeing before cleaning and tightening all
>> the connections.
>>
>> Of course, shortly after going through all those gyrations, that newly
>> cleaned power supply was the one that took the lightning hit about 2
>> months ago.
>>
>>
>> Mike Duke, K5XU
>> American Council of Blind Radio Amateurs
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