background image

QAMP-40 • 19 

The Ramsey Kit Warranty 

 

Please read carefully BEFORE calling or writing in about your kit. Most 
problems can be solved without contacting the factory.

 

 

Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All 
Ramsey kits will work if assembled properly. The very fact that your kit includes this new manual is your 
assurance that a team of knowledgeable people have field-tested several "copies" of this kit straight from 
the Ramsey Inventory. If you need help, please read through your manual carefully, all information 
required to properly build and test your kit is contained within the pages!   
 

1. DEFECTIVE PARTS:

 It's always easy to blame a part for a problem in your kit, Before you conclude 

that a part may be bad, thoroughly check your work. Today's semiconductors and passive components 
have reached incredibly high reliability levels, and it’s sad to say that our human construction skills have 
not! But on rare occasions a sour component can slip through. All our kit parts carry the Ramsey 
Electronics Warranty that they are free from  defects for a full ninety (90) days from the date of purchase. 
Defective parts will be replaced promptly at our expense. If you suspect any part to be defective, please 
mail it to our factory for testing and replacement. Please  send only the defective part(s), not the entire kit. 
The part(s) MUST be returned to us in suitable condition for testing. Please be aware that testing can 
usually determine if the part was truly defective or damaged by assembly or usage. Don't be afraid of 
telling us that you 'blew-it', we're all human and in most cases, replacement parts are very reasonably 
priced.   
 

2. MISSING PARTS:

 Before assuming a part value is incorrect, check the parts listing carefully to see if it 

is a critical value such as a specific coil or IC, or whether a RANGE of values is suitable (such as "100 to 
500 uF"). Often times, common sense will solve a mysterious missing 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 guess the 'red' band really does look orange!")  
Ramsey Electronics project kits are packed with pride in the USA. If you believe we packed an incorrect 
part or omitted a part clearly indicated in your assembly manual as supplied with the basic kit by Ramsey, 
please write or call us with information on the part you need and proof of kit purchase. 
 

3. FACTORY REPAIR OF ASSEMBLED KITS:

  

To qualify for Ramsey Electronics factory repair, kits MUST:     
1. NOT be assembled with acid core solder or flux. 
2. NOT be modified in any manner. 
3. BE returned in fully-assembled form, not partially assembled. 
4. 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. 
5. 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. To assist customers in such situations, Ramsey Electronics, Inc., reserves the right to solve 
their needs on a case-by-case basis. 
The repair is $50.00 per hour, regardless of the cost of the kit. Please understand that our technicians are 
not volunteers and that set-up, testing, diagnosis, repair and repacking and paperwork can take nearly an 
hour of paid employee time on even a simple kit. Of course, if we find that a part was defective in 
manufacture, there will be no charge to repair your kit (But please realize that our technicians know the 
difference between a defective part and parts burned out or damaged through improper use or assembly). 
 

4. REFUNDS:

 You are given ten (10) days to examine our products. If you are not satisfied, you may 

return your unassembled kit with all the parts and instructions and proof of purchase to the factory for a 
full refund. The return package should be packed securely. Insurance is recommended. Please do not 
cause needless delays; read all information carefully. 

 

Summary of Contents for QAMP40

Page 1: ...s Built in T R relay automatically switches between receive and transmit Runs on 12 volts DC at 2 to 4 amps ideal for field day or battery operation Multistage low pass filter for a clean signal Opera...

Page 2: ...ion 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 RAMSEY MINI...

Page 3: ...tions 6 Initial testing 12 Verifying RF output power 13 Troubleshooting tips 15 Using the QAMP40 16 Parts layout diagram 17 Schematic diagram 18 Ramsey kit warranty 19 KIT ASSEMBLY AND INSTRUCTION MAN...

Page 4: ...P amplifier is very simple with most of the magic being done by just a few parts the pair of MOSFET transistors and the ferrite wideband transformers Transformer T2 matches the 50 ohm amplifier input...

Page 5: ...d red R11 1 5 K potentiometer marked 502M R4 SEMICONDUCTOR DEVICES 1 Zener diode 6 2 volt gray body with black band D1 2 1N4148 type signal diode glass body with black band D2 3 1 1N4002 style black e...

Page 6: ...d polarized capacitors for proper orientation TIPS AND NOTES Use a good soldering technique let your soldering iron tip gently heat the traces to which you are soldering Heat both wires and pads simul...

Page 7: ...ls only one way 5 Install potentiometer R4 This pot allows adjustment of the bias to the power transistors 6 Install C9 01 f disc capacitor marked 01 or 103 or 10 nf 7 Install Q5 221334 PNP transistor...

Page 8: ...lead marked with a black stripe while PC boards have the hole indicated 22 Install D1 6 2 volt Zener diode gray body with a black band This diode provides a stable voltage which is used to provide bia...

Page 9: ...Be sure to observe correct polarity 34 Install C4 560 f disc capacitor marked 560 or 561 35 Install C5 330 f disc capacitor marked 330 or 331 36 Install C6 another 330 f disc capacitor marked 330 or 3...

Page 10: ...older Tin all the way up to the toroid core body 42 Winding L2 Locate the remaining yellow toroid core and cut 15 of the enameled magnet wire Wind 22 turns through the core using the same procedure as...

Page 11: ...mplete turns through the core Again the amount of wire cut for this task is the proper amount If you have too little or too much then you have not wound the core correctly Tin each end with solder as...

Page 12: ...er solder joints misplaced components transistors or diodes placed wrong electrolytic capacitors installed wrong INITIAL TESTS To prepare your amplifier for testing you ll need the following 1 Multime...

Page 13: ...e Ramsey CQAMP case set provides an ideal perfectly sized cabinet that matches all other Ramsey kits Study the following sections on DC power supply and RF power considerations Operate your transmitte...

Page 14: ...a socket for the bulb of your choice or even soldered directly to the bulb RF voltage levels in this amplifier can vary from 2 to 25 volts RMS depending on various factors Typically 1 watt power level...

Page 15: ...in the neighborhood A poorly matched antenna along with higher supply voltages is usually responsible for this occurring Any prolonged parasitic emissions may also overheat and destroy other component...

Page 16: ...al USING THE QRP POWER AMPLIFIER Hooking up and using the amplifier is easy Just connect your existing transmitter to the QAMP input and the antenna to the QAMP output A resonant antenna is an absolut...

Page 17: ...rcuit board can be mounted nicely in a standard VHS videotape storage box which also gives room for storing cables a small homemade keyer etc The controls are easily mounted at one end of such a box I...

Page 18: ...QAMP 40 18...

Page 19: ...ch be assured that the 1K ohm resistors are actually the missing 10 K parts Hum m m I guess the red band really does look orange Ramsey Electronics project kits are packed with pride in the USA If you...

Page 20: ...al for RAMSEY MODEL NO QAMP40 40 METER 20 WATT LINEAR AMPLIFIER KIT RAMSEY ELECTRONICS INC 590 Fishers Station Drive Victor New York 14564 Phone 585 924 4560 Fax 585 924 4555 www ramseykits com REQUIR...

Reviews: