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AA7

 

 

 

7

 

ˆ

Needle Nose Pliers (RS64-1844) 

ˆ

Small Diagonal Cutters (RS64-1845) 

 

ADDITIONAL SUGGESTED ITEMS

 

ˆ

Soldering Iron Holder/Cleaner (RS-64-2078) 

ˆ

Holder for PC Board/Parts (RS64-2094) 

ˆ

Desoldering Braid (RS-2090) 

 
 
ASSEMBLY INSTRUCTIONS 

 

   The following assembly steps are given in accord with the LEARN-AS-
YOU-BUILD philosophy for Ramsey Kits. To the extent that is reasonably 
possible, parts are installed in the order of signal flow as depicted on the 
schematic diagram, with some discussion of the components whenever 
useful. 
 
   Because the AA7 is of great interest to people who simply enjoy shortwave 
listening and VHF monitoring, experienced ham operators should understand 
that our instructions are addressed to people for whom this may be their very 
first electronic kit project. 
 

First Assembly Steps 

 

   Perform all assembly on a suitable surface which will not be damaged by 
hot solder.  A cardboard box, cut so that it is flat tends to work well if you do 
not have such a surface conveniently available.  Always use caution 
operating and storing a hot soldering iron.  We like to live under a nifty motto 
here at Ramsey that we think you will agree with (or will come to agree 
with!).  “A hot soldering iron looks just the same as a cold soldering iron.”  
Trust me...  it’s true.

 

 
   Since you may appreciate some "warm-up" soldering practice as well as a 
chance to put some "landmarks" on the AA7 PC-board, we first will install 
some "hardware" components, to make the up-down, left-right orientation of 
the PC board as clear as possible. 
 
   In ALL of the following instruction steps, our word "INSTALL" means to do 
the following: 
 

Insert the part, oriented correctly, into its correct holes in the PC-board.   

If helpful, gently BEND the part's wire leads or tabs to hold it into place, 
with the body of the part snugly against the top side ("component side") 
of  the PC-board.  The top side is the side that does not contain metal 
traces, but does have an outline of each part printed on it. 

Содержание AA7

Страница 1: ...ludes internal telescopic whip antenna plus auxiliary antenna input jack for jazzing up existing antennas Clear concise assembly instructions carefully guide you to a finished kit that works FIRST tim...

Страница 2: ...wave Motion Detector ML Music Lights Kit LC1 Inductance Capacitance Meter RAMSEY AMATEUR RADIO KITS HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW7 CW Keyer QRP Power Amplifiers RAMS...

Страница 3: ...pose 5 Parts List 6 Assembly Instructions 7 Schematic Diagram 8 Parts Layout Diagram 9 Initial Tests 12 Using your AA7 12 Troubleshooting Guide 13 Active Antenna Comparisons 14 The AA7 s Enclosure 14...

Страница 4: ...If what you want is a great quality active antenna for a whole lot less than others sell it for the answer is obvious The Ramsey AA7 active antenna An active antenna is a compromise between what is id...

Страница 5: ...r hooked to a piece of wire The AA7 was designed with reference to research carried out by Ulrich L Rohde and T T N Bucher who co authored Communications Receivers Principals and Design New York McGra...

Страница 6: ...7 F to 10 uF electrolytic capacitor C4 RESISTORS 1 100 ohm brown black brown R4 2 100K ohm brown black yellow R3 R6 1 220K ohm red red yellow R2 1 1M ohm brown black green R1 1 10K ohm PC mount poten...

Страница 7: ...solder A cardboard box cut so that it is flat tends to work well if you do not have such a surface conveniently available Always use caution operating and storing a hot soldering iron We like to live...

Страница 8: ...AA7 8...

Страница 9: ...AA7 9 AA7 PARTS LAYOUT DIAGRAM...

Страница 10: ...nstall R6 100K brown black yellow next to C3 NOTE Save the extra wires nipped away from C3 R6 and similar parts You will use them to make jumper wires 5 Notice that Q2 the 2SC2498 transistor is instal...

Страница 11: ...ts the antenna jack J1 and the receiver jack J2 directly together when in the turned off position Solder all six points of the switch 20 Install receiver jack J2 Solder all four points of the jack 21...

Страница 12: ...nice about the AA7 is that using it is simple enjoyable and immediate We have two suggestions that will increase your enjoyment of the AA7 right from the beginning 1 Prepare a reliable coaxial cable w...

Страница 13: ...current limiting resistor of about 1K ohm to the closest PC board ground point Note This can be locations such as the black wire of the battery the mounting case of either jack but it CANNOT be the an...

Страница 14: ...hs of the other units resulted in increased signal strength It becomes a question of how much you wish to pay for the shortest possible indoor antenna The AA7 s competition performs well but we are su...

Страница 15: ...g part problem If you re missing five 10K ohm resistors and received five extra 1K resistors you can pretty much be assured that the 1K ohm resistors are actually the missing 10 K parts Hum m m I gues...

Страница 16: ...00 Ramsey Publication No MAA7 Assembly and Instruction manual for RAMSEY MODEL NO AA7 ACTIVE ANTENNA KIT REQUIRED TOOLS Soldering Iron WLC100 Thin Rosin Core Solder RTS12 Needle Nose Pliers MPP4 or R...

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