--------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4400002 Date: 04/02/98 From: BRENDAN KEYPORT Time: 12:35pm \/To: MICHAEL STRATES (Read 0 times) Subj: Re: RFI-TVI On 04/02/98 / 12:34:20, Brendan Keyport was babbling to Michael Strates about: RFI-TVI MS> "You must not affix any sign or antenna to the premisis" ... Tripod... Affixed to bricks, that are not affixed to the premisis. problem? what problem? PoohBear Wuz Here, B Keyport, N7UIE --- MacKennel 2.6 * Origin: QSA, Tacoma, NA, Earth USR DS v34+x2v90 (1:138/201.0) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4400003 Date: 04/02/98 From: BRENDAN KEYPORT Time: 12:38pm \/To: HOLGER GRANHOLM (Read 0 times) Subj: Re: Filter Cap values in R-4 On 04/02/98 / 12:37:01, Brendan Keyport was babbling to Holger Granholm about: Filter Cap values in R-4 HG> JE->around 3' = 1M HG> HG> Almost correct, 0.9 meter. uh.... Just a nitpick here but.. "around 3'" is "about = 1M" -- 3' would be 9 meter, right? When your dealing with vagues, you assume vagues on both sides... least that's the way I was taught. :) PoohBear Wuz Here, B Keyport, N7UIE --- MacKennel 2.6 * Origin: QSA, Tacoma, NA, Earth USR DS v34+x2v90 (1:138/201.0) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4400004 Date: 04/02/98 From: BRENDAN KEYPORT Time: 12:47pm \/To: RUSS WUERTZ (Read 0 times) Subj: Re: 49Mhz to 6m... On 04/02/98 / 12:39:06, Brendan Keyport was babbling to Russ Wuertz about: Re: 49Mhz to 6m... RW> OK... Does a 600 kHz offset make a difference when transmitting on 00 RW> or more Watts. When I transmit with more watts, do I need to have RW> a duplex offset like that? Or is that so conversations cannot be listened RW> into because TX and RX are on different frequencies so a person has to be a RW> part of the club to know all these offsets? This history of these RW> things I do not know. What I should do to get my transmission sent more RW> clearly w/out interfering with anyone I should be informed of. All the offset is for is repeater use... it's just a way of us being able to use the band most effectively. the 600 kHz split, I believe was most commonly in use when it was desided that the ARRL needed to come up with some sort of guideline to use the band. There may be some technical aspect behind it.. Anyway... Repeater operation: TX on one frequency to the repeater. Repeater TXes on another frequency (at a pre-programed interval) to get your signal farther. That's the critical point.. If you are talking on a repeater transmitting on 146.62mHz, it is supposed to be listening to 146.02mHz. It simply uses it's superiour equiment to pick up your signal, and repeat it out to the masses on it's 146.62mHz frequency. The advantages of this is rather simple. In FM, most operations, if not all, are line of sight. Repeaters are usually located in such a location, that hey cover a MUCH wider area that you can. For example, I can transmit about 20 miles on my handheld most cases around town. if I used the 145.33 repeater it recieves on 144.73, -600kHz offset) - my signal would be able to reach at _LEAST_ 70 miles in all directions of the repeater's site. Ya get the picture? PoohBear Wuz Here, B Keyport, N7UIE --- MacKennel 2.6 * Origin: QSA, Tacoma, NA, Earth USR DS v34+x2v90 (1:138/201.0) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4400005 Date: 04/03/98 From: RICHARD BRUMBAUGH Time: 10:08pm \/To: BRENDAN KEYPORT (Read 0 times) Subj: Filter Cap values in R-4 Hi Brendan... On 02 Apr 98 you wrote to Holger Granholm... HG> Almost correct, 0.9 meter. BK> uh.... Just a nitpick here but.. "around 3'" is "about = 1M" -- 3' BK> would be .9 meter, right? When your dealing with vagues, you assume BK> vagues on both BK> sides... least that's the way I was taught. :) Three feet is equal to 0.9144 meters by my brand spankin' new Radio Shack Metric Conversion calculator. :-)) 73 from Dick, W5MFD since 1946 rb@gratisnet.com --- PPoint 2.05 * Origin: NorCal QRP CLub * W5MFD * Tulsa OK * (1:170/302.17) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4400006 Date: 04/03/98 From: BRUCE LEGRANDE Time: 11:19pm \/To: RUSS WUERTZ (Read 0 times) Subj: Repeater Logic Abreviations used herein; ==================================================== KHz = KiloHertz MHz = MegaHertz Kc = Kilocycles (same as KHz) Mc = Megacycles (same as MHz) PTT = Push To Talk Rptr = Repeater Xmit = Transmit Recv = Receive Russ Wuertz wrote: RW> OK... I transmit on 146.340 and a 600 Mhz offset automaticly KILOHERTZ - NOT MegaHertz ---------- ^^^^^^^^^ (600 KHz = 6 tenths of a MHz) RW> activates (when I have my radio set to autoduplex) and I transmit RW> on 146.940. And when you UNKEY the 'PTT' your radio returns to receive on 146.340! | | (Xmit) 146.940 --------> | | <------- 146.940 (Xmit) (Recv) 146.340 <------- | | ------> 146.340 (Recv) -+- -+- | | 0 | ___|_____|___ | O \|/ | ==x== | \|/ / \ | | / \ You | Repeater | Them --------------------------------------------------- ===================================================== || | (audio & key) | || || TRANSMITTER | (signals) | TRANSMITTER || || TUNED TO | | TUNED TO || || 146.340 Mc | ---<----| 146.340 Mc || || |-->-- | | || ||_______________| | | |________________|| || | | | | || || RECEIVER | ------>-----| RECEIVER || || TUNED TO | | | TUNED TO || || 146.940 Mc |----<---- | 146.940 Mc || || | | || || | | || ===================== REPEATER ====================== The rptr recvs your signal on 146.940 and REtransmits it at the SAME time on 146.340 (*** 600 KHZ *** offset), then 'them' hears it with a receive freq of 146.340. When you unkey, 'them' xmits on 146.940 - the rptr REtransmits it on 146.340 and since you have YOUR receive set to that freq, you hear their reply. You BOTH!!! Transmit on 146.940 MHz, and you BOTH!!! receive on 146.340 MHz... (just NOT at the same time. Only one can transmit at a time (semi-duplex)) If you are trying to communicate on a SIMPLEX frequency, then you need to shut OFF your "autoduplex" function, so that you xmit and recv on the SAME frequency. In this mode you will NOT be using a repeater, and you should make SURE! you are on an accepted SIMPLEX frequency (see comment re: book - below). It is NOT cool to talk SIMPLEX on the 'input' frequency of a repeater because you would be tying up the repeater so no one else can use it. On occasion, it is OK to talk simplex on the output frequency of the repeater if the other station you're talking to is close enough that you can use a LOW power setting so as not to interfere with those listening to (or for) traffic via the repeater. In -ANY- case, those using the repeater have priority, and if you want to talk SIMPLEX ---> go to a SIMPLEX frequency... Note: there are SOME places that have repeaters set up with an ODD offset (split) other than 600 KHz, or a REVERSED split, in which case you may need to manually set your radios' offset instead of relying on the "autoduplex" function. If you don't have an 'ARRL Repeater Directory Handbook', you should probably pick one up at your local HamRadio Store. That little book will help you understand how repeaters are used in your area. And last I checked, the cost was only about $6 at most... It (the book) will also list the various sub-audible (not "subliminal") tones used to access the rptrs in your area. Hope this helps you understand repeater operation a bit better :) --- WtrGate v0.93 Unreg * Origin: GreenTree Ground Station * CM88 * 707-987-ISDN (1:2003/0) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4400007 Date: 04/03/98 From: DICK DISANA Time: 11:55am \/To: JEFF EDMONSON (Read 0 times) Subj: Filter Cap values in R-4 1000mm = 1meter --- * Origin: Cindex Support BBS (314) 837-5422 Florissant, MO. (1:100/395) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4500000 Date: 04/03/98 From: HOLGER GRANHOLM Time: 11:27am \/To: JEFF EDMONSON (Read 0 times) Subj: Metric values Howdy Jeff, JE->That's what I thought, too. But, that's not right. 100mm = 1cm. JE->100cm = 1m. Wrong again! 100mm = 10cm = 1dm = 0.1m Maybe it would be easier to remember this way: m = base value dm = decimeter from "decimal" = 1/10th cm = centimeter from "cent" = 1/100th mm = millimeter from "milli-" = 1/1000th 73 de Sam, OH0NC * OLX 2.2 * If plugging it in doesn't help, turn it on. --- PCBoard (R) v15.22 (OS/2) 2 * Origin: Coming to you from the Sunny Aland Islands. (2:20/228) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4500001 Date: 04/04/98 From: ROY WITT Time: 07:30am \/To: RICHARD BRUMBAUGH (Read 0 times) Subj: Filter Cap values in R-4 03 Apr 98 22:08, Richard Brumbaugh said this about Filter Cap values in R-4 to Brendan Keyport. HG>> Almost correct, 0.9 meter. RB> RB> BK>> uh.... Just a nitpick here but.. "around 3'" is "about = 1M" -- 3' BK>> would be .9 meter, right? When your dealing with vagues, you assume BK>> vagues on both BK>> sides... least that's the way I was taught. :) RB> RB> Three feet is equal to 0.9144 meters by my brand spankin' new Radio RB> Shack Metric Conversion calculator. :-)) That's right, Dick. But when we're talking "around" or "about", we round off to make the conversation a little shorter. If you take 3.28 feet as equal to 1 meter, we've rounded off the 3.28 feet from 3.28084 feet. A little easier to say 3.28 than it is to say all the way out to the 5th decimal place. The same goes for 1mm. It's actually .03937008 inches, but sometimes we round that off to .040, since it's so close. The only time that will ever matter is when a machinist has to hold that dimension within .00000025....:) ... Please Use Sugar & Spice When Uttering Sexual Sarcasm! --- T(W)itt Filter Tossed v1.13 * Origin: Moosle Beach Brothel, Moosle Beach, CA (1:202/909.13) --------------- FIDO MESSAGE AREA==> TOPIC: 188 HAM TECH Ref: F4500002 Date: 04/03/98 From: JIM BENTLEY Time: 06:54pm \/To: HOLGER GRANHOLM (Read 0 times) Subj: SSM EUROPA Hello Holger thanks for the reply it looks as if I,ve got it about right more by good luck than anything else,OK on the spelling I put the msg on in real time as I havent got the OLR working that good yet so i TEND TO RUSH and not use the dictionary that much so I must get the OLR working then it wount happen I ope Hi. Thanks for the reply I,ll look for you again. 73 Jim --- FLAME v1.1 * Origin: SpeedMail TBBS, Leeds UK * +44 (0)113 232 0351 * V.34+ (2:250/355)