[ICOM] PRO III and shut down
Mike Olbrisch
mike-2007 at elp.rr.com
Tue Jul 3 08:32:57 EDT 2012
The neat thing about electronics is all the cool inventions. Like freeze
mist. Somebody actually invented it, for cooling and troubleshooting
circuits. Anti-static, with a small applicator tube to drip it right on the
component. I have isolated ad tantalum capacitors by dripping freeze mist
on them one-by-one until the circuit stared working.
Say you don't have any freeze mist, and don't want to order some and wait
two weeks? That's easy too.
A can of freeze mist used up-side-down is a can of compressed air for
cleaning keyboards etc. Likewise, a can of compressed air used up-side-down
is a can of freeze mist. You can get it at Staples, Office Depot, or any a
number of office supply stores.
That was what I suggested earlier, freeze mist. The ice cube in a plastic
bag is a bad idea. What if the component was hot enough to melt the bag?
Cooled metal objects could also short out components. Only you can decide
if you want to risk a $2k radio over a $2 can of freeze mist.
Vy73 - Mike - KD9KC.
El Paso, Texas - DM61rt.
W5-SOTA Association Manager.
NA-SOTA info: http://na-sota.org/
-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Joe De Gregorio
Sent: Tuesday, July 03, 2012 06:13
To: ICOM Reflector
Subject: Re: [ICOM] PRO III and shut down
An ice cube in a plastic bag will cause condensation. I would not use this
method. An ice cube cooled metal spoon wiped dry, then placed on suspected
component should be ok. Just my humble opinion.
Joe
de WB2CPN
Sounds like a component in the ProIII has developed
an intermittent contact with whatever it's soldered to.
If the ProIII shuts down, try cooling the individual parts
and see if you can find anything. You can place an ice
cube in a small plastic bag, the smaller the better, and
one that does not leak water, and do this while the ProIII
is still powered up. For a smaller cooling agent, try
placing a small piece of metal, a screw driver maybe, in
the refrigerator freezer for a while, then using it as a
probe before it warms back up. Careful wih shorting
something out. Very Careful.
Sometime a hair dryer with the heat turned off will work.
Best 73 Clete
++++++++++++++++++++++++++++++++++++
On 7/2/2012 10:22 PM, Larry Young wrote:
> Sam and all: Turning off the Pro from its power button does not remove
voltage from the PA module if the power supply remains powered on: this
would explain why the power output returns after a few minutes of the
powersupplies being turned off. It may be that something is amiss in or
around the power amp module.
> Larry K4LXV
>
> --- On Mon, 7/2/12, hamop <k5yy at cox.net> wrote:
>
> From: hamop <k5yy at cox.net>
> Subject: Re: [ICOM] PRO III and shut down
> To: "ICOM Reflector" <icom at mailman.qth.net>
> Date: Monday, July 2, 2012, 10:06 PM
>
> Not that I can tell Roger and I did look at that too. Strange and
something
> I can only guess at, despite all the Icom, Yaesu and Kenwood xcvrs I
have
> had over the years. Never had this "shut down" issue and having a "cool
> down' period to bring things back temporarily.
> 73 Roger,
> San
>
> -----Original Message-----
> From: Roger (K8RI)
> Sent: Monday, July 02, 2012 8:56 PM
> To: icom at mailman.qth.net
> Subject: Re: [ICOM] PRO III and shut down
>
> On 7/2/2012 6:38 PM, Mike Olbrisch wrote:
>> Two power supplies and one radio involved - sure sounds like something
>> going
>> on with the radio. You can prove (or disprove) the heat issue by
shooting
>> some freeze spray on the drivers and finals. If it comes back in, it
is
>> heat related.
> How about watching the current draw? does it go above normal
>
> 73
>
> Roger (K8RI)
>
>
>> Good luck sir.
>>
>> Vy73 - Mike - KD9KC.
>> El Paso, Texas - DM61rt.
>> W5-SOTA Association Manager.
>> NA-SOTA info: http://na-sota.org/
>>
>>
>>
>>
>> -----Original Message-----
>> From: icom-bounces at mailman.qth.net
[mailto:icom-bounces at mailman.qth.net]
>> On
>> Behalf Of hamop
>> Sent: Monday, July 02, 2012 16:29
>> To: ICOM Reflector
>> Subject: Re: [ICOM] PRO III and shut down
>>
>> Thanks. Bruce, I have a LATE PROIII, about December of 2010 with the
newer
>> finals from the original IIIs. I just now went to a dummy load and
had
>> 100
>>
>> watts output but after transmitting dits and dashes for just about 15
>> seconds, a rather quick loss of ALC and power to 5 watts. So, no amp
>> issues
>> and grounds good and using 1:1 dummy load. This has never happen
before.
>> Even have used RTTY at 100 watts quite often with 150 countries worked
>> since
>>
>> last November. And some of that was rather constant calling a DX
station.
>> CW
>>
>> DX calling for hours and no problems. But as of today ( and I did call
a
>> DX
>> station for 10 minutes today before this happened ) since problem
>> happened,
>> just a few seconds of XMIT and have to turn PS125 AND PRO for 5 mintues
or
>> more and then get 15 seconds of OK transmit power. Again, receiver is
fine
>> and ALC is great during that time.
>> TU for comments ..
>> San K5YY
>>
>> -----Original Message-----
>> From: Bruce
>> Sent: Monday, July 02, 2012 5:20 PM
>> To: 'ICOM Reflector'
>> Subject: Re: [ICOM] PRO III and shut down
>>
>> Does it happen on ALL bands? Could be drivers ready to go and causing a
>> intermittent short, the drivers, 2SC1972's were very
>> finicky with their bias..factory at one time was setting the bias
current
>> to
>> high.
>>
>> -----Original Message-----
>> From: icom-bounces at mailman.qth.net
[mailto:icom-bounces at mailman.qth.net]
>> On
>> Behalf Of hamop
>> Sent: Monday, July 02, 2012 3:16 PM
>> To: ICOM Reflector
>> Subject: Re: [ICOM] PRO III and shut down
>>
>> Ken, it happens with the amp off, and everything is the SAME as it has
>> been
>> for 2 + years now and never a problem. Same good ground etc. Just
tried
>> the
>>
>> PRO III again and after just keying down about 10-15 seconds, the PRO
went
>> off. I am not running the amp, only 100 watts output. And, I have to
turn
>> off the PS125 also, if just turn off the PRO III for several minutes
and
>> back on > no output. If I turn off the PS AND PRO III for same minutes,
>> all
>> comes back to 100w. So it is not just turning off the PRO that is
>> necessary.
>>
>> But, when back on line, I can maybe transmit a few seconds before
shutdown
>> to 5-6 watts, no ALC etc. Thanks for information.
>> San K5YY
>>
>> -----Original Message-----
>> From: Ken Sands
>> Sent: Monday, July 02, 2012 5:07 PM
>> To: ICOM Reflector
>> Subject: Re: [ICOM] PRO III and shut down
>>
>> Make sure ALL your (HEAVY) grounds go to a (HEAVY) common point and
then
>> to
>> a cold water pipe ground or other GOOD ground system..
>> It seems you are feeding RF back from the linear to the Pro 3.
>>
>> My 2 cents,
>> Ken K8TFD
>>
>> On Mon, Jul 2, 2012 at 5:59 PM, hamop <k5yy at cox.net> wrote:
>>
>>> Hello all ... need some assistance. Never had this situation
happen
>>> before. Today while operating on 20m CW I noted no output, well maybe
5
>>> watts, and I thought maybe the PS125 had blown an internal fuse for
some
>>> reason. I was running about 50 watts to a Titan amplifier at the time,
my
>>> main setup for 3 years now. Well, rather than tear into the PS125, I
put
>>> a
>>> PS85 in line and again a full 100 watts immediately. So thought the
PS125
>>> had truly blown a fuse. Well, after another shutdown to about 5 watts
I
>>> thought the PS85 had also blown a fuse.
>>> As one last effort, after about 5 minutes, I returned on the
PS125
>>> and
>>> PRO III and a full 100 watts output again. I found out that if I
turned
>>> on
>>> the rig and did NOT hook the PTT line to the Titan, all seemed to be
OK
>>> with no "shut down". But, even keying the amp with an EXTERNAL foot
>>> switch
>>> and trying to drive the amp, bang ... again just 5 watts out, but it
>>> returned to 100 watts after another 5-6 minutes. Is the PRO III or
PS125
>>> and PS85 ( unusual for both to do it) heating up inside causing the
>>> shutdown by some quirk feedback from the Titan amp? Seems like if
just
>>> barefoot straight to the antenna, I can transmit 100 watts as normal
with
>>> NO shutdown. Puzzling to me for sure. Appears since same thing
happened
>>> to
>>> the PS 125 and 85 that both should not have developed the same 'shut
>>> down'
>>> issue. That leaves me wondering if my PRO III finals are overheating
some
>>> how?
>>> Thanks for any suggestions. Receive is fine the entire time. If
I
>>> shut
>>> down the PS and PRO III for just 3-4 minutes, the output may drop
quickly
>>> with about 20 seconds of CW and the longer units are off , the longer
the
>>> power stays up.
>>> 73
>>> San K5YY
>>>
>>> ----
>>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>>> Icom FAQ: http://www.qsl.net/icom/
>>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>
>
>
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>
>
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html
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