2 Aug
2015
2 Aug
'15
3:25 p.m.
On 08/02/2015 10:51 AM, Jochen Kunz wrote:
Am 01.08.15 um 23:24 schrieb Robert Jarratt:
Thia may well be true with some old Weller designs. I
thought the EC1302 and related irons were really well-designed,
but they are now obsolete. The tip had a hole drilled up
the back where a temperature sensor fit, and the heater
surrounded the OD of the tip. The problem with them is if
you let the plating break down, the solder amalgamates with
the copper core of the tip and swells it, and then you can't
remove it from the heater. That's a $60 repair part!
The Weller WMP is 65 Watts, and has a hollow tip that the
heater-sensor pokes up into. These seem to work well, and
the larger sized tips have no shortage of thermal conductivity.
(The above are not stand-alone irons, but need an
electronically-controlled station.)
Jon
PS A related question. I struggled somewhat with
the Weller Magnastat No. 8
tip, when trying to solder leads to the ground plane, I could not get the
solder to stay molten very long.
Wellers are notorious for this. I had to use
various Weller irons at
occasion. They all suffered from the same problem: To high thermal
resistance between heater and tip. It is a pain to (de)solder to a
ground plane, as the heat can't flow from the heater to the tip fast
enough. I consider Wellers unusable for this reason.