User manual RAMSEY QRP80

[. . . ] 80 METER (3. 5 MHz) CW TRANSMITTER Ramsey Electronics Model No. QRP-80 THE RAMSEY QRP-80 IS AN AMAZING PERFORMER THAT WILL WORK THE WORLD ON ABOUT A WATT!FOLKS OF ALL AGES HAVE SUCCESSFULLY BUILT AND ENJOYED THIS EASY, FUN KIT. · · · · · · · · · Ideal for portable or travel fun VCXO design allows up to 5 KHz of tuning about the crystal frequency Front panel switching of TWO channels and includes a crystal for 3. 579 MHz, the International QRP frequency Excellent and clean keying waveform Built-in antenna T-R switch Operates on 12 - 15 volts DC at 1/4 amp current Appoximately 1 Watt RF power Clear, concise step-by-step instructions carefully guide you to a finished kit that not only works - but you'll also learn too! [. . . ] The parts layout diagram is quite clear regarding this. (The reason for these holes is that different frequency bands require various styles of inductors and capacitors for correct VXO frequency and shift). Now, since we have gone to all this explaining, let's install some more parts!Install L1A and L1B, the slug tuned inductors. The inductors have three mounting pins and stand up-right. Simply insert squarely into PC board and solder all pins. Install C1, . 01µF (marked . 01 or 103 or 10nF). Install R2, 1 megohm (brown-black-green). Install varactor diode D3, observe correct placement of the flat side. (Varactor diodes act as a variable capacitor whose capacitance is varied by the voltage applied across it). QRP-80 · 15 27. Install varactor diode D4, observe flat side placement. Install R3, 1 megohm (brown-black-green). Install R6, 470 ohms (yellow-violet-brown). With the above components installed correctly, the three holes for Q1 should be clearly apparent. Make sure Q1 is correctly identified as a 2N3904. Install C5, . 01µF (marked . 01 or 103 or 10nf). Install R7, 100 ohms (brown-black-brown). Install C4, . 01µF (marked . 01 or 103 or 10 nf). Install R5, 10K ohms (brown-black-orange). It's time to decide which crystal(s) are to be installed in which position and to install at least one of them for testing. Notice that there are two pairs of holes for each crystal connection, so that you can install virtually any standard crystal case style. HALFTIME SUGGESTION It won't be too much longer before your Ramsey transmitter is ready for testing and on-the-air operation. It is common for experimental projects to give disappointing results because of inefficient "haywire" hookups as soon as they are completed. [. . . ] INCLUDE a description of the problem and legible return address. DO NOT send a separate letter; include all correspondence with the unit. Please do not include your own hardware such as non-Ramsey cabinets, knobs, cables, external battery packs and the like. Ramsey Electronics, Inc. , reserves the right to refuse repair on ANY item in which we find excessive problems or damage due to construction methods. [. . . ]