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[. . . ] VHF LOW NOISE PREAMP KIT
Ramsey Electronics Model No. PR100
Boost up those weak signals without adding in unwanted noises!The PR100 has a three section tuned circuit and a double helical filter to allow only the desired signal to be amplified, while attenuating signals outside the band. A perfect match for any 2 meter receiver!
· Extensive filtering for low noise operation, 1dB noise figure! [. . . ] Install C9, a 8. 2pF ceramic capacitor (marked 8. 2). Install C5, another 2. 2pF ceramic capacitor (marked 2. 2). Install C10, yet another 8. 2pF ceramic capacitor (marked 8. 2). Install L3, one of the metallic, square shaped inductors (marked 3597787) Make sure the holes line up with the pins before soldering. Install L4, another one of the inductors (marked 359-7787) 10. Install L5, the last of the tunable inductors (marked 359-7787). Install C7, a 10pF ceramic capacitor (marked 10). Install Q1, the 2SC2498 NPN UHF transistor. This transistor has excellent low noise characteristics, and can amplify signals into the microwave region!Note that the pin out of this transistor is different than that of a switching transistor, so mount it in the orientation as shown in the Parts Layout Diagram. Make sure and use the correct holes for mounting!Install R2, a 47K ohm resistor (yellow-violet-orange). Keep the leads as short as possible, as well as neat!Install R1, a 100 ohm resistor (brown-black-brown). This is also a stand up resistor as well. Bend your leads as shown in the diagram. Install C2, a 100pF ceramic capacitor (marked 100 or 101). Install L1, one of the 2. 2uH coils (green body, red-red-gold stripes). Install R4, a 300 ohm resistor (orange-black-brown). Notice that this is a lay down part.
PR100
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18. Install C1, a . 01uF ceramic capacitor (marked 103, . 01, or 10n). Install L2, another 2. 2uH inductor (green body, red-red-gold stripes). [. . . ] BE accompanied by the proper repair fee. No repair will be undertaken until we have received the MINIMUM repair fee (1/2 hour labor) of $25. 00, or authorization to charge it to your credit card account. INCLUDE a description of the problem and legible return address. DO NOT send a separate letter; include all correspondence with the unit. [. . . ]
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