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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 $18.00, 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 $36.00 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 BN9

Страница 1: ...fiers Intercom systems Anywhere some quick audio amplification to speaker level is needed Keep several of these for The BN9 combines a high gain transistor pre amp with the powerful LM 380 audio ampli...

Страница 2: ...of applications While high gain may be used for projects such as super sleuthing low gain can be used for Walk man boosting and telephone boosting This kit is called the super sleuth due to the very...

Страница 3: ...ectrolytic capacitors C3 C4 C6 1 100 F to 500 F electrolytic capacitor C5 1 220K ohm resistor red red yellow R1 1 10K ohm resistor brown black orange R2 1 NPN transistor 2N3904 Q1 1 LM380 audio amplif...

Страница 4: ...on components As all good technicians and experimenters know parts must be mounted flush to the PC board Not only for mechanical strength and looks but also to prevent oscillation problems by long le...

Страница 5: ...art can be soldered flush to the board with ease Don t worry about all the pins being tied together in the center these are grounding pins that also act as heat sinks to keep your amp from getting too...

Страница 6: ...itor 10 Install C6 the 4 7 F or 10 F electrolytic capacitor 11 Install C5 the 100 F or 500 F electrolytic capacitor Whew what a challenge It looks as if we are done installing all the components inclu...

Страница 7: ...greatest power Make sure the speaker wires are in the correct holes 3 If you are wiring up a jack for earphone or external plug in speaker the tip of the plug goes to the positive speaker connection a...

Страница 8: ...amplifier stage This is done by removing or just plain not installing the preamp transistor and substituting a jumper made from a scrap component lead for R1 This allows you to still get the full 2 1...

Страница 9: ...ulated power supply Also make sure your microphone casing is shielded as well These noise problems are most evident with high impedance microphones Problem All kinds of pops siren sounds or something...

Страница 10: ...e voltage sags in response When the voltage sags it allows the power source to come back up again along with another audio peak Now the whole thing occurs over and over until you become annoyed enough...

Страница 11: ...ke 5K to 100K potentiometer for volume control 10K resistor brown black orange 01uf Ceramic capacitor NOTE To make a full performance big ear listening system use a snow coaster or large plastic popco...

Страница 12: ...ohm speakers Your choice of enclosures IN OUT Low gain BN 9 Remote Local 3 Mini public address amplifier Components required 8 Ohm PA speaker or horn speaker 5K to 100K Potentiometer Electret micropho...

Страница 13: ...IN OUT HornSpeaker High Gain BN 9 4 Auxiliary amplifier for mini receivers Components required 8 Ohm speaker 5K to 100K Potentiometer 10 ohm resistor To Receiver IN OU T 10 Low gain B N 9...

Страница 14: ...r earphone OTHER APPLICATIONS With a little ingenuity you can use the preceding setups to custom design your own system The BN9 being simple to assemble and operate is an ideal choice for circuit add...

Страница 15: ...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 belie...

Страница 16: ...SS70A Speech Scrambler TT1 Telephone Recorder SP1 Speakerphone MD3 Microwave Motion Detector PH14 Peak Hold Meter TG1 DTMF Tone Grabber RAMSEY AMATEUR RADIO KITS DDF1 Doppler Direction Finder HR Seri...

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