[Boatanchors] (no subject) desoldering

[Al Parker]

Hi Robert,
   The sucked up solder path even in the pistol grip unit is straight back
into the "chamber," so pencil or pistol is no different there.  The pencil
may be slimmer and better to get into deep places, but I've not had a
problem with my 470B pistol type.
    I'm using the smallest dia. tip, 0.8mm I think, and I'll buy a 1.0mm
tip next time.  I suspect that's my main problem, but I do notice more
clogging in the tip when sucking up MFP covered joints (I do usually try
to clean the MFP off  first).  I have had a cupla incidents of plugging in
the heating element.  I have a thin piece of SS wire to rod both out.  I
suspect that keeping the trigger pulled to long after the solder is sucked
up cools the tip by the cool air "zipping" thru, and promotes plugging.
There's a lot of air, you can hear the solder get sucked up.
    All in all, it's a great aid in the kinda work we do, I'm very happy I
finally spent the $.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info

----- Original Message ----- 
From: <WA5CAB at cs.com>
To: <boatanchors at mailman.qth.net>
Sent: Monday, December 13, 2004 7:46 PM
Subject: [Boatanchors] (no subject)


> Bruce, Jim, et al,
>
> OK. This thread has convinced me that I do enough restoration and repair
work
> that I need to put some money into a desoldering station.
Unfortunately,
> Hakko have discontinued the 470 and 472 in favor of the 472D-01 and
472D-02.
> Apparently I should have reached this conclusion a year ago.
>
> NIB 470B's and 472's have shown up on eBay recently so I'll wait. But in
the
> meantime, I'd like some advice from people who've used these units
regularly.
> The difference between the two models appears mainly to be in the
handpiece.
> The 470 (and 470B) has a pistol grip one and the 472 a pencil style one.
I want
> to mainly use it on tube based military sets built 1955 and earlier.
And
> maybe an occassional PC board.
>
> Any comments on clog rates between the two handpiece styles if
desoldering
> typical military sets with incompletely removed MFP and 50+ year old
solder?
> Reason I ask is that the suction flow path must make a 90 degree turn in
the
> pistol grip style.
>
> Any recommendations as to tip number (or OD and bore) under the above
> conditions?
>
> Any comments as to relative comfort and ease of use working inside of
> chassis, IF transformers, etc. between the pistol grip and pencil type
handpieces? Or
> should I just plan on having both? Assume (true or not) that cost is no
> object.
>
> TIA.
>
> Robert Downs - Houston