[Boatanchors] (no subject)

[Glenn Little WB4UIV]

Robert and the group.

I use a PACE desoldering tool. I think that they started the tool. The pump 
that I have on my PPS-100 is a rotary vane pump. When kept clean, it builds 
up a good vacuum quickly. The PPS-100 is obsolete, but units show up at 
that auction place. One thing that PACE does is places two filters in line. 
The solder goes through the heated tip and the element into a collection 
tube. The collection tube has an "S" baffle in it that helps cool the 
solder and keeps it from blocking the collection tube. At the end of the 
collection tube is a felt plug. This stops the solder, keeps the drose in 
the tube and collects part of the vaporized flux. The suction tubing goes 
to an inline filter just prior to the box that holds the vacuum pump. This 
filter traps most of the rest of the vaporized flus that did not condense 
on the suction tube. This keeps most of the flux out of the vacuum pump. 
PACE tells the operator to suck alcohol through the pump to clean it. I 
usually disassemble the pump as needed to clean the rotor and the vanes.

I use a welding torch tip cleaner to keep the airway clear in the PACE 
desoldering iron. PACE tells you to drive the tip out from the back of the 
element if it gets stuck. I have had to drill a tip out before.

I have had no problems getting into close places with this desolderer.

My first desoldering station was an Endeco desoldering iron modified to 
accept a vacuum hose in place of the suction bulb. I used a refrigerator 
compressor to develop the vacuum, an air tank for a vacuum reservoir, a 
pressure switch set for vacuum to control the pump and an air solenoid to 
apply the vacuum to the iron. The solenoid was operated with a foot switch 
the same as the PACE unit I use today.

Hope that this rambling helps a little.

73
Glenn
WB4UIV

At 07:46 PM 12/13/04, WA5CAB at cs.com wrote:
>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
><http://www.wa5cab.com> (Web Store)
><wa5cab at cs.com> (Primary email)
><wa5cab at houston.rr.com> (Backup email)
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