[KYHAM] Fwd: Radio Theory and Construction Workshop

[Bill Fuqua]

>
>Sorry, entered the wrong date.
>Saturday Nov. 29th
>>
>>The Radio Theory and Construction Workshop will meet Saturday, November 
>>29, 2003 in the basement of the Red Cross Building at 1450 Newtown Pike, 
>>Lexington, KY. The Workshop will begin at 1:00PM and continue until 3:00PM.
>>
>>This workshop is for anyone interested in the subject of radio theory or 
>>construction. Anyone may join the workshop at any time. This workshop 
>>does not really have a beginning or an end. It is a continuing effort to 
>>help those that are interested in knowing more about the internal 
>>workings of radios (receivers, transmitters and antennas) and/or building 
>>them. A ham license is not required and there are no age restrictions. I 
>>encourage young students to participate.
>>Participants will have to obtain their own tools and they will need to 
>>purchase a beginner's radio kit (AM-550K).
>>
>>I have some kits in stock just now so you will not have to wait. Just pay 
>>me for the kit and I'll order another to replace it in stock. That way we 
>>will have some always available for new participants.
>>
>>The Bluegrass Amateur Radio Society's Youth Education Program (Y.E.P.) 
>>can provide "Now Your Talking" books for students up thru the 12th grade 
>>participating in our "Introduction to Amateur Radio" and books, kits, 
>>tools and parts for those in the "Radio Theory and Construction Workshop" 
>>at no cost.
>>
>>This kit cost about $20 and it is perfect for learning soldering, 
>>component identification and basic radio theory. Sources for these kits are:
>>Edlie Electronics http://www.edlieelectronics.com/
>>Electronics express http://www.elexp.com/.
>>There are two styles of kits. One has an integrated circuit audio 
>>amplifier (AM-550K) and the other has a transistor audio amplifier 
>>(AM-550KT). We prefer the one with the integrated circuit Amplifier but 
>>you can use the other if you like or if the preferred one is not 
>>available. Also, a very basic portable cassette tape player will be 
>>needed. These are less than $10 at many department stores or can be found 
>>in garage sales for a $1 or so. It has been reported that WalMart has 
>>them for about $5. The cassette player will be modified to become a 
>>sensitive audio amplifier for future experiments and trouble shooting. I 
>>try to encourage participants to be resourceful and use common items 
>>found around the home. The tape player is a good example.
>>If you wish to join our workshop please e-mail me so that I can add you 
>>to our list. I have a short questionnaire to get some information about 
>>your interest, experience and knowledge level. If you cannot be contacted 
>>by e-mail call me in the evening at (859) 272-9523 and I will add you to 
>>a phone list. This is necessary because we do not hold the workshop every 
>>weekend due to other obligations, vacation, hamfest and license exam sessions.
>>Please let me know if you are coming and what you have to bring or would 
>>like to discuss at the workshop so I can have some time to prepare and 
>>gather any materials that will be helpful. Even if you are not coming to 
>>the workshop I would appreciate an email. I like to stay informed of your 
>>project's progress and I am always happy to answer any questions you may 
>>have. If anyone is interested in starting the beginning basic workshop or 
>>if you know of someone please contact me.
>>
>>I have some advanced kits for the participants to look at and consider.
>>1. 6 and 2 meter FM receiver kit
>>2. Direct conversion SSB and CW kit for any HF ham band by Ten Tec
>>3. Active antenna kit
>>4. Universal BFO kit ( this one will be used with the AM receiver kit in 
>>some new experiments that I am adding.)
>>It will be used as a BFO on the AM broadcast band to demonstrate 
>>frequency mixing to audio "direct conversion".
>>And as an 455 KHz IF BFO for the kit as well.
>>5. We have also discovered some CW code practice receiver kits still in 
>>storage. These are direct conversion crystal controlled W1AW receiver kits.
>>
>>I expanding the lab manual that comes with the AM550 receiver kit.
>>After building the audio amplifier has been completed a crystal receiver 
>>can be constructed using the amplifier to improve sensitivity.
>>I am also adding a few extra parts in the kit to build a simple RF test 
>>generator to allow comparative sensitivity and selectivity measurements 
>>between the crystal detector, direct conversion receiver and 
>>superheterodyne receiver. A beat frequency oscillator is also being added 
>>to the kit to illustrate how direct conversion receivers work and diode 
>>mixers.
>>I will also be changing the procedures so that expensive electronic 
>>instruments ( RF oscillators and oscilloscopes) will not be necessary. 
>>One option would be using a computer's sound card as signal generator , 
>>oscilloscope, spectrum analyzer and AC voltmeter.
>>
>>I have added one more part to the kit so that the student can do even 
>>more experiments. That is a crystal (ceramic) high impedance earphone. 
>>With the earphone we can construct a simple, no battery required, crystal 
>>set receiver the first day with very little assembly. Also, after 
>>building the audio amplifier the earphone can be used as a microphone to 
>>demonstrate voice amplification. Or how an intercom works.
>>
>>A new outline of the class will be sent out soon. I have redesigned the 
>>class quite a bit.
>>
>>73
>>Bill wa4lav
>>
>>William L. Fuqua III P.E.
>>Electrical Engineer
>>CP 177 Chemistry Physics Building
>>Department of Physics and Astronomy
>>University of Kentucky
>>Lexington,KY 40506-0055
>>Phone: 1-859-257-4155
>>e-mail:  wlfuqu00@uky.edu


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