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 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. 

Содержание SHA1

Страница 1: ...rior signal to noise ratio Uses the LM386 audio amplifier ICs Better than 100dB Signal to noise ratio 10Hz to 100kHz power spectrum 3dB Almost 1W output per channel when run on 9V battery Accepts mike...

Страница 2: ...DIO KITS DDF1 Doppler Direction Finder HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW7 CW Keyer CPO3 Code Practice Oscillator QRP Power Amplifiers RAMSEY MINI KITS Many other kits ar...

Страница 3: ...Strategy 6 Parts List 7 Parts Layout Diagram 8 Part Values Diagram 9 Schematic 10 Assembly Steps 12 Testing the SHA1 16 Troubleshooting 17 KIT ASSEMBLY AND INSTRUCTION MANUAL FOR RAMSEY ELECTRONICS IN...

Страница 4: ...ifier capable of driving low impedance loads It requires very few external components runs very efficiently and has great fidelity With the sibilance switch open the audio passes directly into U1 and...

Страница 5: ...pacitor and it serves the same purpose as C1 at the start of the circuit This prevents the DC portion of the signal on the output of U1 from being sent to the earphones VR1 C15 and C16 supply the regu...

Страница 6: ...gently heat the traces to which you are soldering heating both wires and pads simultaneously Apply the solder on the iron and the pad when the pad is hot enough to melt the solder The finished joint s...

Страница 7: ...gold R4 8 2 10K ohm potentiometers R3 6 Capacitors 5 01uF ceramic capacitors Marked 01 10n or 103 C4 8 10 12 14 4 10uF electrolytic capacitors C1 6 15 16 1 470uF to 1000uF capacitor C2 2 220uF capaci...

Страница 8: ...SHA1 8 PARTS LAYOUT DIAGRAM...

Страница 9: ...SHA1 9 PARTS VALUE DIAGRAM...

Страница 10: ...SHA1 10...

Страница 11: ...SHA1 11...

Страница 12: ...c capacitor Marked 01 10n or 103 4 Install R2 a 4 7K ohm resistor yellow violet red 5 Install R7 another 4 7K ohm resistor yellow violet red 6 Using a scrap piece of component lead install JMP2 These...

Страница 13: ...scrap piece of component lead install JMP5 Note that this part does not need to be bent as shown in the diagram just make sure that it is installed in the correct holes 16 Install C4 a 01uF ceramic ca...

Страница 14: ...rientation 25 Install C6 a 10uF electrolytic capacitor Orientation 26 Install C1 the remaining 10uF electrolytic capacitor 27 Install J3 the 1 4 earphone jack Make sure all the pins are soldered for g...

Страница 15: ...e to orient the cap as the silkscreen shows 38 Install the battery connector by soldering the black wire into the hole marked and the red wire into the hole marked 39 Install J4 the power jack Well it...

Страница 16: ...olt battery or DC power supply Simply connect your SHA1 up as if you were going to use it 1 Connect your signal source to the two RCA jacks on the SHA1 2 Hook up the 9V battery or power supply 3 Turn...

Страница 17: ...s OK SOLUTION You may have a short or open somewhere through the circuit This is where an oscilloscope would come in handy Insert an audio signal into both of the inputs then trace through the circuit...

Страница 18: ...SHA1 18...

Страница 19: ...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 b...

Страница 20: ...ED TOOLS Soldering Iron Ramsey WLC100 Thin Rosin Core Solder Ramsey RTS12 Needle Nose Pliers Ramsey MPP4 or RTS05 Small Diagonal Cutters Ramsey RTS04 OR Technician s Tool Kit TK405 ADDITIONAL SUGGESTE...

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