Manuale d’uso / di manutenzione del prodotto QRP CW POWER AMPLIFIER KIT QAMP30 del fabbricante Ramsey Electronics
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QAMP- 30 • 1 Ramsey Electronics Model No. Q A MP30 Need a little extra boost for yo ur QRP rig? Believe it or not, 20 watts is only about an ‘S’ unit below a 100 watt rig! This nifty little amp will add some “punch” to any QRP tra nsmitter.
QAMP- 30 • 2 RA M SEY T RA NSMIT TE R KIT S • FM100B Professi onal FM Ste reo Transmi tter • FM25B S ynthesized Stereo FM Transmitter • MR6 Model Rocket Tr acking Transmi tter • TV6 Tele vis.
QAMP- 30 • 3 Ramsey Publication No. MQAMP30 Price $5.00 TABLE OF CONTENTS Introduction to the QAMP30 ........... 4 How it works ........... .............. .......... 4 Parts list .............. ............. .......... .... 5 Tips and notes ........
QAMP- 30 • 4 IN TRO DU C TIO N The Ra msey QAMP ser ies of QRP power ampl ifiers are co mpact 1 0 to 20 watt RF amplifiers for QRP C W transmitters. These amplifiers are m ade to be driven by transmitters in the ½ to 2 w att ran ge.
QAMP- 30 • 5 PARTS LIST F O R THE Q AMP30 QRP POWER A MPLIFIER CAPA CITORS: 1 100 t o 220 µ f elect rolytic ca pacitor [ C1] 1 10 µ f elect r oly tic capaci tor [C2] 4 .
QAMP- 30 • 6 "THE RAMSE Y LEARN-AS-YOU-BUI LD ASSEMBLY STRATEG Y" Take a look at the parts layout diagra m. There is quite a lot to the construction of the QAMP30. It's easier than it seems once you get going, especially after you have installe d a fe w of the "land m ark" compo nents.
QAMP- 30 • 7 • If helpf ul, gently bend the pa rt’s wire lead s or tabs to hold it in place, with the body of the part snugly against the top side (component side) of the PC board. • Solder a ll wires or pi ns of the pa rt, whether t he 2 wires of a resistor or the 3 or 4 wires of a transistor.
QAMP- 30 • 8 16. Install diode D4, 1N40 02 style black epoxy diode. Check positioning of the banded end. 17. Install jumper JMP2. Use a piece of scrap com ponent lead wire bent into a "staple" shape and inserted into the board like a component.
QAMP- 30 • 9 These last four parts (R8, 9 and C11,12) form parasit ic suppression net works across each transistor to suppress any tendency for high frequency oscill ation in the pow er amplifier. 32. Install C3, anot her .1 µf disc ca pacitor (m arked .
QAMP-30 • 10 W e're al m ost finished. All w e need to do now is install a f ew remaining parts that have to be handmade - for that "old-w or ld craf tsmanship" touch ! W e'll prepare all those parts now f or f urt her assembly .
QAMP-30 • 11 amount of w ire cut fo r this task is the proper amount. If you have too little or too much, then you have not w ound th e core correctl y. Tin ea ch end with solder as before. Tin all the w a y up to the core body. Th is winding is the primary of transformer T2.
QAMP-30 • 12 47. Locate the smaller trans forme r (T2) and in stall it snugly on the PC board. 48. Install the larger tra nsformer (T1) into the indicated location on the PC board. 49. Install L1, a 15 turn to roid inductor wo und previ ously.
QAMP-30 • 13 3. Connect a dummy load t o J1, the amplifier RF output. In a pinch, a light bu lb ma y be us ed - see the section, "Ver ifying RF Po wer Output." 4. Temporarily insta ll a jumper f rom the collector o f Q3 to ground. 5.
QAMP-30 • 14 VE RI FYI NG TR ANS MI T TER RF OU TP U T The most important thing to know is whether yo ur transm itter is delivering some measurable and reassuring level of RF pow er. Th en you can continue on to adding the QRP amplifier and checking out the whole set-up.
QAMP-30 • 15 Amateur radio magaz ines and hand books provide a varie ty of circuits for RF wattm eters an d relati ve field -strength indicat ors, in cluding me thods of using your VOM as an indicating device.
QAMP-30 • 16 If you he ar an AC hum on the transmitted signal, usual causes are RF getting back into the power suppl y or a b ad VSW R on the antenn a. These short checks in no way de tail an y and all problems that can rear their ugly he ad, but should get you on the way to solving m ost errors.
QAMP-30 • 17 W hile we believe that th e R ams ey enclosure an d kno b option is a f ine value for finishing off y our Ramsey kit, we are happy to g ive you a coup le of additional suggestions and our reasons for them.
QAMP-30 • 18.
QAMP-30 • 19 Amateur radio magazines and handbooks provide a variety of circuits for RF wattmeters and rela tive field-strength indicato rs, including methods of using your VOM as an indicating device. CQ magazine for March 19 90 off ers an article by The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit.
QAMP-30 • 20 Q AMP30 20 WATT LINEAR AMPLIFIER Quick Referen ce Page Guide Introduction to the QAMP-30 .......... 4 How it works .............. .......... ........... 4 Parts list ........... ............. ............. ..... 5 QAMP-30 assembly instructions .
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Ramsey Electronics QRP CW POWER AMPLIFIER KIT QAMP30 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
