In “Down Periscope” [Aug 2008, pp 41-42], the schematic, Figure 4, has a few errors. Connections 1 through 3 should be labeled To Rotator and the wire originally labeled 3 should be relabeled 1. The wire originally labeled 1 should be relabeled 3. The capacitor should be between new terminals 1 and 2. The upper pair of connections, +12 and GND should be labeled To Inverter.

In “Pocket dBm RF Power Meter” [Aug 2008, pp 65-67], C1 in Figure 2 is shown connected to the emitter of Q1 (at the junction of R13). It should instead be connected to the junction of the Q1 collector and R14. In addition, the listed vendor for thermistor R9 is a wholesale source with Electronic Goldmine (www.goldmine-elec-products.com), the retail outlet. They have a $10 minimum order. Possible alternate, but untested, substitutes include Digi-Key part number 317-1277-ND (www.digikey.com) or Jameco part number 20748 (www.jameco.com). If needed, R3 can be adjusted to compensate for any differences from the original.

In “Microwavelengths” [Aug 2008, pp 93-94], polarity protecting diode D2 shown in Figure 4 is actually mounted with the battery connections and thus not shown in Figures 5 or 6. It should be included to protect the circuitry in case the battery is connected backward.

In “Portable Two Element 15 Meter Yagi” [Jul 2008, pp 36-38], the part number of the EMT clamp (33940) is for the 100 pack of clamps. Many stores are likely to carry it only in the six pack container, and that part number is 33916. — Mike Osterberg, KØVZ

The subscription rate for Dubus Magazine is $35 USD not $30 [“New Products,” Jul 2008, p 32]. — Janet Cole, Dubus North American Representative

The June 2008 cover photo of the Ole Virginia Hams Field Day GOTA station was taken by George Tarnovsky, K4GVT.