TWO OPTIONS OF HEATERS FOR AQUARIUMS OFFER OUR READERS. Uniform temperature in the aquarium keeps the water-filled Cycling or any other appropriate size camera. It is placed as shown in the figure.
S. KINDLER, Saratov
Heaters that are commercially available — with a filament and salt, or bulky, or too powerful.
“Semiconductor” heater:
1 — wire bracket, 2 — tube, 3 — sand, 4 — tube, 5 — resistor, 6 — power cord with plug.
Within a few minutes you can make a “heating” coal resistors type MLT, VS-2, MT-2, etc. with a capacity of 2 watts. They are inserted into the glass tube, the ends are attached to power cord with plug and close the vial stopper. The power of the heater can be more than 20 watts.
V. BEDNYAGIN, Novocherkassk
Recommend to read
FROM “SPIDOLY” LAB!
(Continued. Beginning at No. 1' 2005) Instruments based on the radio. Modification of the receiver "VEF-Spidola" The radio is a transistor superheterodyne (Fig.For the;...
AIRFRAME F1-A
Among the priority directions of search to achieve the best results in athletes performing in class gliders F1-A, now in a special place is dinamalar — because of its effectiveness and...
