larry moe 'n curly wrote:
Michael A. Terrell wrote:
"Michael A. Terrell" wrote:
http://www.harborfreight.com/1500-watt-dual-temperature-heat-gun-572-1112-96289.html
$19.99 regular price. On sale for $9.99 at times.
I received their weekly e-mail right after I posted. It is on sale
for $7.99 with the coupon below:
http://www.harborfreightusa.com/html...7/images/2.jpg
Here is the user manual:
http://images.harborfreight.com/manu...6999/96289.pdf
The power switched popped out 3/16" when I pressed it (2 samples)
Then why did you buy one? Mine is fine, and I just picked one off
the shelf, yesterday. I already have an old B&D, and a five year old HF
heat gun. The case on the B&D melted when I had to preheat some 1.5"
copper pipe while assembling the cooling system on an old TTU-25B UHF TV
transmitter. I also needed an acetylene torch & a 175W Weller iron to
remove some damaged copper pipe from some custom 30 year old brass
fittings RCA used in that transmitter. The HF has been used to remove
floor tiles, on heat shrink, and to expand metal castings to remove
bearings.
The diode in series with the heating element is a 1N5408, rated
for 3 amps average. The heater draws 8A average on low.
So my question is, how long will this 3A diode last?
Where is the 1N5408 diode? It isn't listed in the parts list or
shown in the drawings:
http://images.harborfreight.com/manu...6999/96289.pdf
How long to you use a heat gun per application? Can you read a
datasheet, or only skim one? That 3 A rating is for continuous duty at
a high operating temperature, not intermittent. The peak current rating
is 200A. The case would likely melt before the diode would fail.
http://www.datasheetcatalog.org/datasheet/GeneralSemiconductor/mXyztrxt.pdf
I've seen four 1N4004 diodes in a bridge, in series with the heater in
a hair dryer to power the dc motor on the fan. Are you claiming that a
tool like that can only provide less than 120 watts of heat?
--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.