Weller WCC100 soldering station

This is an informational post for owners of the Weller WCC100 soldering station. Some Elecraft builders have used this soldering station for building their kits.

This is the BLUE colored station that was sold by Weller until 1999, when it was discontinued

The Weller WLC100, which is an ORANGE colored station, is a totally DIFFERENT station. The WLC100 is NOT temeprature controller uses an OEM light dimemr module) and uses the Weller "ST" series of soldering tips. Information on the WLC100 model, can be found here:

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The Weller WCC100 is a temperature controlled soldering station that Weller sold in 1990s, until it was discontinued by Weller in 1999. I have found some vendors that still have a few of these stations in stock. The WES51 soldering station, introduced in 2002 replaced the WCC100 model. The WCC100 station uses the Weller "ET" series soldering tips, which are readily available and used on a number of current Weller soldering stations (WES51, EC series, Silver Series).

I am collecting pertinent documentation for this Weller station (including the Tech Sheet) that will eventually be available electronically (likely through BAMA).

The WCC100 soldering station is a line voltage (120 VAC) station. This station has NO isolation transformer and the control board is connected directly to line voltage (no fuse, surge protection or safety capacitor). The control board monitors the thermocouple (temperature sensor) and 120 VAC heater.

Parts numbers for Weller WCC100 solder station

WCC101 - Replacement Iron w/ETA tip WCC102 - Replacement Heater (120 V) WCC103 - Temperature Sensor w/Spring WCC104 - Sponge WCC105 - Spring and Funnel Assembly WCC106 - Control Board WCC108 - Weller Barrel Nut SW120 - Switch (Carling LRA series illuminated rocker) ET series tips - widely available and used in Weller WES51, "EC" and Silver Series stations ====

WCC102 heater has a resistance of about 348 to 350 ohms at room temperature (27 C)

WCC103 temperature sensor has a resistance of about 1 to 2 ohms at room temperature (27 C) This resistance increases (thermocouple) as the temperature rises -- the control board then compares this to the temperature set by the user (potentiometer). A "zero-crossing" circuit then turns off the heater (usually via a Triac or transistor switch) -- when the temperature is reached and turns the heater back on, when the temperature drops below this point.

I acquired a WCC100 soldering station, via eBay, that was non-functional in December 2007. The temperature sensor (WCC103) had failed (open - infinite resistance) in this station's iron. Some parts are becoming more difficult to obtain for this station, since Weller discontinued it over 8 years ago.

IF you have a dead WCC100 station, now is the time to get it repaired, unless you are scrapping it (I will accept these donations).

These Distributors have Weller WCC100 parts "in stock", as of December 2007

Allied Electronics

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WCC103 Temperature Sensor (115 units in stock) Allied part number: 984-2267, price: $ 7.30 == Santa Cruz Electronics

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WCC102 - Replacement Heater (120 V) - $ 21.34 WCC104 - Replacement Sponge - $ 1.50 WCC106 - Control Board - $ 5.74 WCC108 - Weller Barrel Nut - $ 7.52 == GC Electronics (available at any GC Electronics reseller or retailer) SW120 - Replacement Illuminated Rocker switch GC Electronics part number 35-3740 - $ 3.00

Carling Curvette LRA series - LRA211C. LRA211: 125V Neon Lamp; 16A 125VAC; .250 QC Tabs; OFF-NONE-ON (SPST); Red Transparent, Black bezel.

== Greg W9GB

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The Weller WCC103 temperature sensor is actually an iron-constantan thermocouple (possibly Type J), although Weller used Type K thermocouples for its EC station series . Sensitivity believed to be about 50 µV/°C The relationship between temperature and voltage produced is NON-Linear.

What is a thermocouple sensor? A thermocouple is a sensor for measuring temperature. It consists of two dissimilar metals, joined together at one end. When the junction of the two metals is heated or cooled a voltage is produced that can be correlated back to the temperature. The thermocouple alloys are commonly available as wire.

When replacing the WCC103 sensor the leads MUST be correctly installed or the iron stays on continuously and eventually overheats. The Iron (magnetic) lead connects to the RED wire The Constantan (copper-nickel alloy/non-magnetic) lead connects to the YELLOW wire


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