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Date: Thu, 28 Apr 94 16:58:58 PDT From: Info-Hams Mailing List and Newsgroup <info-hams@ucsd.edu> Errors-To: Info-Hams-Errors@UCSD.Edu Reply-To: Info-Hams@UCSD.Edu Precedence: Bulk Subject: Info-Hams Digest V94 #467 To: Info-Hams Info-Hams Digest Thu, 28 Apr 94 Volume 94 : Issue 467 Today's Topics: * SpaceNews 18-Apr-94 * Amplifier impedance (was SWR & Powre Loss) Daily Summary of Solar Geophysical Activity for 26 April Daily Summary of Solar Geophysical Activity for 27 April FCC computers FT416 and "PO5" RB315 Semantics - Telecommunicators scanner better than TV for disasters! STS-56 QSL cards SWR & Power Loss Wanted: Buckmaster CDROM Callbook BBS DOOR Send Replies or notes for publication to: <Info-Hams@UCSD.Edu> Send subscription requests to: <Info-Hams-REQUEST@UCSD.Edu> Problems you can't solve otherwise to brian@ucsd.edu. Archives of past issues of the Info-Hams Digest are available (by FTP only) from UCSD.Edu in directory "mailarchives/info-hams". We trust that readers are intelligent enough to realize that all text herein consists of personal comments and does not represent the official policies or positions of any party. Your mileage may vary. So there. ---------------------------------------------------------------------- Date: 27 Apr 94 01:10:00 GMT From: agate!darkstar.UCSC.EDU!news.hal.COM!olivea!charnel!yeshua.marcam.com!news.kei.com!eff!news.umbc.edu!europa.eng.gtefsd.com!emory!swrinde!sdd.hp.com!saimiri.primate.wisc.edu!news.crd.ge Subject: * SpaceNews 18-Apr-94 * To: info-hams@ucsd.edu In a message on 04/26/94, JOHN MAGLIACANE said to ALL about * SpaceNews 18-Apr-94 *: References: <9404181602.AA01100@ka2qhd.de.com> JM> * SOLAR ECLIPSE INFORMATION * JM> ============================= JM> On 1994 May 10 (Tue), an annular solar eclipse will be visible throu JM> North and Central America. The May issue of "Sky & Telescope" (p 72 JM> details this event, the last of its type visible in the continental JM> until 2012 May 20. Does anyone have any additional information regard the times and percent eclipse for the North Eastern U.S. (Specifically Boston)? I have already told my daughter's science teacher about this upcoming event and he wants to plan some activity around the eclipse and has asked me for any additional information. Keep in mind that a lot of the news groups have been very slow so if you have any information, I'd appreciate receiving it by EMAIL. Thanks in advance. Derek * RM 1.3 00223 * I hit the CRTL key but I'm still not in control! ------------------------------ Date: Thu, 28 Apr 1994 19:56:45 GMT From: ihnp4.ucsd.edu!usc!math.ohio-state.edu!magnus.acs.ohio-state.edu!csn!col.hp.com!srgenprp!alanb@network.ucsd.edu Subject: Amplifier impedance (was SWR & Powre Loss) To: info-hams@ucsd.edu Tom Bruhns (tomb@lsid.hp.com) wrote: : ... Suppose I connect a generator : to the output connector of the amplifier and adjust the generator : to deliver 1 watt into the impedance I "see" looking back into : the amplifier. : Exactly where do you expect that 1 watt to be dissipated? In the power amplifier tube, assuming everything else is lossless. : What effect will you see on the meters monitoring the : power supply voltage and current of the amplifier? Nothing. Since the tube is assumed to be in its linear region, the 1 watt is a small signal wiggling the plate voltage up and down, with a resulting AC current determined by the tube's output plate resistance. If the signal becomes large enough to get a non-linear response in the tube, then there might be some self-rectification causing a change in DC plate current. AL N1AL ------------------------------ Date: Wed, 27 Apr 1994 16:43:32 MDT From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!convex!news.duke.edu!eff!news.kei.com!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.UCSD Subject: Daily Summary of Solar Geophysical Activity for 26 April To: info-hams@ucsd.edu /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY 26 APRIL, 1994 /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ (Based In-Part On SESC Observational Data) SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 26 APRIL, 1994 --------------------------------------------------------- !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 116, 04/26/94 10.7 FLUX=081.0 90-AVG=091 SSN=050 BKI=1223 2221 BAI=007 BGND-XRAY=A6.4 FLU1=6.9E+05 FLU10=1.5E+04 PKI=1232 1212 PAI=006 BOU-DEV=009,012,018,021,014,018,013,006 DEV-AVG=013 NT SWF=00:000 XRAY-MAX= B9.7 @ 0216UT XRAY-MIN= A5.9 @ 1859UT XRAY-AVG= B1.2 NEUTN-MAX= +004% @ 1420UT NEUTN-MIN= -002% @ 1345UT NEUTN-AVG= +0.2% PCA-MAX= +0.1DB @ 1900UT PCA-MIN= -0.2DB @ 0800UT PCA-AVG= -0.0DB BOUTF-MAX=55338NT @ 1411UT BOUTF-MIN=55302NT @ 1812UT BOUTF-AVG=55326NT GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+077,+000,+000 GOES6-MAX=P:+128NT@ 1911UT GOES6-MIN=N:-071NT@ 0545UT G6-AVG=+097,+025,-033 FLUXFCST=STD:120,115,115;SESC:120,115,115 BAI/PAI-FCST=010,010,020/015,015,025 KFCST=2344 3322 2344 3322 27DAY-AP=012,005 27DAY-KP=1114 3333 2212 2221 WARNINGS= ALERTS= !!END-DATA!! NOTE: The Effective Sunspot Number for 25 APR 94 was 39.3. The Full Kp Indices for 25 APR 94 are: 2o 2+ 2o 1o 1+ 2- 2- 3- The 3-Hr Ap Indices for 25 APR 94 are: 8 9 7 4 5 7 7 12 Greater than 2 MeV Electron Fluence for 26 APR is: 3.0E+07 SYNOPSIS OF ACTIVITY -------------------- Solar activity was very low. Numerous B-class x-ray events were recorded the past 24 hours, all optically uncorrelated. The biggest event was a B9 which maxed at 26/0215Z. Two new regions were numbered this period: Region 7707 (S01W39) and Region 7708 (N09W71). Both new regions appear mostly unremarkable at this time. All other regions have exhibited slow decay the past 24 hours. Solar activity forecast: solar activity is expected to be very low. Regions 7705 (N03W53), 7707, and 7708 all have the potential of producing C-class activity. The geomagnetic field has been at mostly quiet to unsettled levels for the past 24 hours. Geophysical activity forecast: the geomagnetic field is expected to be mostly quiet to unsettled for the first two days of the forecast period. Active conditions are expected on day three due to a favorably positioned recurrent coronal hole feature. Event probabilities 27 apr-29 apr Class M 01/05/05 Class X 01/01/01 Proton 01/01/01 PCAF Green Geomagnetic activity probabilities 27 apr-29 apr A. Middle Latitudes Active 15/20/25 Minor Storm 15/15/25 Major-Severe Storm 05/05/10 B. High Latitudes Active 30/30/20 Minor Storm 20/20/25 Major-Severe Storm 10/10/20 HF propagation conditions were normal over the last 24 hours. Conditions should continue near-normal until 29 April when high latitudes could begin seeing effects of the major recurrent disturbance responsible for producing minor to major ionospheric disruptions over the last several solar rotations. Conditions over all regions are expected to become disturbed on 30 April. COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS ======================================================== REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 26/2400Z APRIL -------------------------------------------------------- NMBR LOCATION LO AREA Z LL NN MAG TYPE 7701 N07W82 120 0070 HSX 02 001 ALPHA 7705 N03W53 091 0060 CSO 05 003 BETA 7707 S01W39 077 0020 DRO 05 003 BETA 7708 N09W71 109 0040 DRO 04 003 BETA 7702 S12W70 108 PLAGE 7704 N06W13 051 PLAGE REGIONS DUE TO RETURN 27 APRIL TO 29 APRIL NMBR LAT LO NONE LISTING OF SOLAR ENERGETIC EVENTS FOR 26 APRIL, 1994 ---------------------------------------------------- BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP 0642 0642 0642 120 POSSIBLE CORONAL MASS EJECTION EVENTS FOR 26 APRIL, 1994 -------------------------------------------------------- BEGIN MAX END LOCATION TYPE SIZE DUR II IV NO EVENTS OBSERVED INFERRED CORONAL HOLES. LOCATIONS VALID AT 26/2400Z --------------------------------------------------- ISOLATED HOLES AND POLAR EXTENSIONS EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN NONE VISIBLE SUMMARY OF FLARE EVENTS FOR THE PREVIOUS UTC DAY ------------------------------------------------ Date Begin Max End Xray Op Region Locn 2695 MHz 8800 MHz 15.4 GHz ------ ---- ---- ---- ---- -- ------ ------ --------- --------- --------- 25 Apr: 1005 1010 1017 B1.0 1031 1032 1041 SF 7706 N06W80 2249 2254 2256 B1.3 2335 2339 2342 B2.3 REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY ------------------------------------------------ C M X S 1 2 3 4 Total (%) -- -- -- -- -- -- -- -- --- ------ Region 7706: 0 0 0 1 0 0 0 0 001 (25.0) Uncorrellated: 0 0 0 0 0 0 0 0 003 (75.0) Total Events: 004 optical and x-ray. EVENTS WITH SWEEPS AND/OR OPTICAL PHENOMENA FOR THE LAST UTC DAY ---------------------------------------------------------------- Date Begin Max End Xray Op Region Locn Sweeps/Optical Observations ------ ---- ---- ---- ---- -- ------ ------ --------------------------- NO EVENTS OBSERVED. NOTES: All times are in Universal Time (UT). Characters preceding begin, max, and end times are defined as: B = Before, U = Uncertain, A = After. All times associated with x-ray flares (ex. flares which produce associated x-ray bursts) refer to the begin, max, and end times of the x-rays. Flares which are not associated with x-ray signatures use the optical observations to determine the begin, max, and end times. Acronyms used to identify sweeps and optical phenomena include: II = Type II Sweep Frequency Event III = Type III Sweep IV = Type IV Sweep V = Type V Sweep Continuum = Continuum Radio Event Loop = Loop Prominence System, Spray = Limb Spray, Surge = Bright Limb Surge, EPL = Eruptive Prominence on the Limb. ** End of Daily Report ** ------------------------------ Date: Wed, 27 Apr 1994 20:48:40 MDT From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!convex!news.duke.edu!eff!news.kei.com!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.UCSD Subject: Daily Summary of Solar Geophysical Activity for 27 April To: info-hams@ucsd.edu /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY 27 APRIL, 1994 /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ (Based In-Part On SESC Observational Data) SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 27 APRIL, 1994 --------------------------------------------------------- !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 117, 04/27/94 10.7 FLUX=078.0 90-AVG=091 SSN=058 BKI=1121 2111 BAI=004 BGND-XRAY=A3.4 FLU1=5.2E+05 FLU10=1.4E+04 PKI=1122 2211 PAI=005 BOU-DEV=006,009,012,007,010,008,005,006 DEV-AVG=007 NT SWF=00:000 XRAY-MAX= B1.5 @ 0930UT XRAY-MIN= A2.7 @ 2155UT XRAY-AVG= A5.7 NEUTN-MAX= +003% @ 2200UT NEUTN-MIN= -002% @ 1825UT NEUTN-AVG= +0.2% PCA-MAX= +0.2DB @ 1955UT PCA-MIN= -0.1DB @ 2240UT PCA-AVG= -0.0DB BOUTF-MAX=55347NT @ 1312UT BOUTF-MIN=55311NT @ 1753UT BOUTF-AVG=55331NT GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+082,+000,+000 GOES6-MAX=P:+125NT@ 1750UT GOES6-MIN=N:-071NT@ 0431UT G6-AVG=+102,+025,-031 FLUXFCST=STD:115,115,120;SESC:115,115,120 BAI/PAI-FCST=010,020,035/015,025,040 KFCST=2344 3322 3445 4433 27DAY-AP=005,006 27DAY-KP=2212 2221 1222 2222 WARNINGS=*GSTRM;*AURMIDWRN ALERTS= !!END-DATA!! NOTE: The Effective Sunspot Number for 26 APR 94 was 36.6. The Full Kp Indices for 26 APR 94 are: 1o 2- 3- 2o 1+ 2- 1+ 2- The 3-Hr Ap Indices for 26 APR 94 are: 4 6 11 7 5 7 5 7 Greater than 2 MeV Electron Fluence for 27 APR is: 3.1E+07 SYNOPSIS OF ACTIVITY -------------------- Solar activity was very low. Only one weak SF flare from Rgn 7705 (N04W69) was recorded this period. All other regions were quiet. Rgn 7704 (N13W29) re-emerged as a 3 spot BXO beta. New Region 7709 (N02W36) was numbered this period as a single AXX spot group. Solar activity forecast: solar activity is expected to be very low. The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Geophysical activity forecast: the geomagnetic field is expected to be mostly quiet to unsettled for day one of the forecast period. Day's two and three will experience mostly active to minor storm conditions due to a favorably positioned recurrent coronal hole. Storm conditions are expected to persist well beyond the forecast period. Event probabilities 28 apr-30 apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green Geomagnetic activity probabilities 28 apr-30 apr A. Middle Latitudes Active 20/25/30 Minor Storm 15/25/35 Major-Severe Storm 05/05/15 B. High Latitudes Active 20/25/30 Minor Storm 20/30/40 Major-Severe Storm 05/10/20 HF propagation conditions were normal over all regions today. Similar conditions are expected over the next 24 to 48 hours, although minor signal degradation could begin to be observed over the high and polar latitude regions on 29 April. Disturbed conditions are expected for most regions on 30 April as geomagnetic storming intensifies. This activity is not expected to subside until about 09 May. COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS ======================================================== REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 27/2400Z APRIL -------------------------------------------------------- NMBR LOCATION LO AREA Z LL NN MAG TYPE 7704 N13W29 054 0010 BXO 03 003 BETA 7705 N04W69 094 0070 HSX 01 001 ALPHA 7707 N00W54 079 0010 BXO 05 002 BETA 7708 N10W83 108 0000 AXX 01 001 ALPHA 7709 N02W36 061 0000 AXX 00 001 ALPHA REGIONS DUE TO RETURN 28 APRIL TO 30 APRIL NMBR LAT LO NONE LISTING OF SOLAR ENERGETIC EVENTS FOR 27 APRIL, 1994 ---------------------------------------------------- BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP NONE POSSIBLE CORONAL MASS EJECTION EVENTS FOR 27 APRIL, 1994 -------------------------------------------------------- BEGIN MAX END LOCATION TYPE SIZE DUR II IV 27/ 0821 0929 1054 LDE B1.5 153 INFERRED CORONAL HOLES. LOCATIONS VALID AT 27/2400Z --------------------------------------------------- ISOLATED HOLES AND POLAR EXTENSIONS EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN NO DATA AVAILABLE FOR ANALYSIS SUMMARY OF FLARE EVENTS FOR THE PREVIOUS UTC DAY ------------------------------------------------ Date Begin Max End Xray Op Region Locn 2695 MHz 8800 MHz 15.4 GHz ------ ---- ---- ---- ---- -- ------ ------ --------- --------- --------- 26 Apr: 0055 0101 0106 B3.6 0205 0215 0223 B9.7 0301 0307 0312 B1.9 0329 0333 0338 B2.0 0526 0530 0533 B1.5 0738 0748 0758 B5.7 0852 0856 0859 B2.1 0943 0947 0950 B1.9 1148 1152 1157 B1.9 1214 1218 1229 B1.8 1349 1357 1408 B3.5 1922 1930 1938 B2.5 REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY ------------------------------------------------ C M X S 1 2 3 4 Total (%) -- -- -- -- -- -- -- -- --- ------ Uncorrellated: 0 0 0 0 0 0 0 0 012 (100.0) Total Events: 012 optical and x-ray. EVENTS WITH SWEEPS AND/OR OPTICAL PHENOMENA FOR THE LAST UTC DAY ---------------------------------------------------------------- Date Begin Max End Xray Op Region Locn Sweeps/Optical Observations ------ ---- ---- ---- ---- -- ------ ------ --------------------------- 26 Apr: 1922 1930 1938 B2.5 III NOTES: All times are in Universal Time (UT). Characters preceding begin, max, and end times are defined as: B = Before, U = Uncertain, A = After. All times associated with x-ray flares (ex. flares which produce associated x-ray bursts) refer to the begin, max, and end times of the x-rays. Flares which are not associated with x-ray signatures use the optical observations to determine the begin, max, and end times. Acronyms used to identify sweeps and optical phenomena include: II = Type II Sweep Frequency Event III = Type III Sweep IV = Type IV Sweep V = Type V Sweep Continuum = Continuum Radio Event Loop = Loop Prominence System, Spray = Limb Spray, Surge = Bright Limb Surge, EPL = Eruptive Prominence on the Limb. ** End of Daily Report ** ------------------------------ Date: Thu, 28 Apr 1994 19:40:35 GMT From: ihnp4.ucsd.edu!usc!math.ohio-state.edu!magnus.acs.ohio-state.edu!csn!col.hp.com!srgenprp!alanb@network.ucsd.edu Subject: FCC computers To: info-hams@ucsd.edu David Stockton (dstock@hpqmoca.sqf.hp.com) wrote: : Jim Grubs, W8GRT (jgrubs@voxbox.norden1.com) wrote: : : I don't know, but rumor has it the Smithsonian wants it when the : : FCC gets a new one. :) : Silly question..... with 12+ week delays etc, and thinking of the : phone bills generated by having to phone ARRL, VEC etc for permission : before phoning the FCC, would it be worthwhile for US amateurs, VECs and : the ARRL to raise funds for a modest PC with a moderately big disc and : volunteer-written software, and then *GIVE* it to the FCC as a donation ? I wouldn't help unless we were willing to put in a major effort to re-write the software to go with it. It's the same problem NASA has with the space shuttle. Sure, the computer hardware is woefully out-of-date, but a new computer would require rewriting and then re-flight-qualifying the software. A serious software bug in the FCC's computer wouldn't be QUITE as disasterous as one in the space shuttle, but it wouldn't be too nifty either. There are reliability questions as well. I'm very sensitive to this having had a hard disc crash on my PC a few weeks ago :=( It still might make sense for ARRL to buy the FCC a high-reliability computer and hire a professional programmer to write them some software. AL N1AL ------------------------------ Date: 26 Apr 94 16:27:03 GMT From: agate!darkstar.UCSC.EDU!news.hal.COM!olivea!charnel!yeshua.marcam.com!news.kei.com!eff!news.duke.edu!convex!cs.utexas.edu!sdd.hp.com!saimiri.primate.wisc.edu!news.crd.ge.com!sarah!@ Subject: FT416 and "PO5" To: info-hams@ucsd.edu In article <2pbfav$jpn@hopper.acm.org>, smithson@ACM.ORG writes: > Just curious if anyone knows what the "PO5" on the front of the radio > means. No reference in the manual. > I kind of wondered about that too. After a bit I came to the conclusion that it means "Power Output 5 watts". Anybody else? Joe - AA3GN -- Joe Landis - System & Network Mgr. - North American Drager Co. landisj@drager.com | uupsi5!main03!landisj | AA3GN @ WB3JOE ------------------------------ Date: Wed, 27 Apr 1994 19:25:06 -0600 From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!convex!news.duke.edu!eff!news.kei.com!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.UCSD Subject: RB315 Semantics - Telecommunicators To: info-hams@ucsd.edu Bid: $RACESBUL.315 TO: ALL ES, CD, AND PUBLIC SAFETY DIRECTORS VIA AMATEUR RADIO INFO: ALL RACES OPERATORS IN CALIFORNIA INFO: ALL AMATEUR RADIO OPERATORS FROM: CA STATE OFFICE OF EMERGENCY SERVICES (W6SIG@WA6NWE.CA) Ph: 916-262-1600 2800 MEADOWVIEW RD., SACRAMENTO, CA 95832 LANDLINE BBS OPEN TO ALL 916-262-1657 RACESBUL.315 RELEASE DATE: February 28, 1994 Subject: MGT - Semantics - Telecommunicator (5 of 7 parts) TELECOMMUNICATOR is a more professional title adopted an increasing number of jurisdictions for what they used to call DISPATCHERS. They operate the public safety communications centers public safety answering points for Nine-One-One. They should be made aware periodically of your jurisdiction's RACES program and how Amateur Radio phone patches work. RACES: The Radio Amateur Civil Emergency Service. The RACES is a program established by any jurisdiction's civil defense official by appointing a radio officer, preparing a RACES Plan, and training and utilizing Amateur Radio operators. The latter are screened for loyalty and reliability prior to taking and signing an oath. The RACES is not a condition; it is a program and unit of local government providing public safety communications. Thus the RACES is not a club, association, or self-governing body. (Series authored by Stanly E. Harter, originally titled "From My Lookout". Edited for digital transmission. Continued.) ------------------------------ Date: 28 Apr 94 20:52:49 GMT From: agate!howland.reston.ans.net!wupost!gumby!newsxfer.itd.umich.edu!zip.eecs.umich.edu!yeshua.marcam.com!news.kei.com!news.oc.com!merlin.etsu.edu!talon@ucbvax.berkeley.edu Subject: scanner better than TV for disasters! To: info-hams@ucsd.edu Y'all, The primary repeater for weather spotting is 146.88. After the tornado struck people who were responsible for aid to the cities were moved to 146.82. The '88 repeater was still being used for weather spotting. I think someone setup a crossband-repeat because after reporting to the staging area, I was told to move to a 440 frequency. I have found that there is about a 10 minute delay between when the hams first sight something and the TV and radio to report it. My entire family now tunes in to the repeater instead of regular TV and Radio. 73, David Fox KB5ULK Dallas County RACES #5265 ------------------------------ Date: 28 Apr 94 18:45:08 GMT From: agate!spool.mu.edu!howland.reston.ans.net!europa.eng.gtefsd.com!library.ucla.edu!csulb.edu!csus.edu!netcom.com!cbayus@ucbvax.berkeley.edu Subject: STS-56 QSL cards To: info-hams@ucsd.edu -- "Hey all are we haveing fun yet!!" KD4FBU cbayus@netcom.com ------------------------------ Date: Thu, 28 Apr 1994 19:47:36 GMT From: ihnp4.ucsd.edu!usc!math.ohio-state.edu!magnus.acs.ohio-state.edu!csn!col.hp.com!srgenprp!alanb@network.ucsd.edu Subject: SWR & Power Loss To: info-hams@ucsd.edu Tom Bruhns (tomb@lsid.hp.com) wrote: : At HF, and generally up into VHF, almost all the loss in matched : coax of decent construction is in I^2*R loss in the conductors. Very : little is in dielectric loss. That's true, but the dielectric can still increase the loss indirectly. Air-dielectric coax requires a certain ratio of outer conductor to inner conductor diameter to achieve the desired impedance. When you add a dielectric material, the center conductor must get smaller to maintain the same impedance. Smaller conductor = higher resistive loss. That's why foam-dielectric coax has less loss than solid-dielectric type: The effective dielectric constant is lower, allowing a larger center conductor. AL N1AL ------------------------------ Date: Thu, 28 Apr 1994 11:22:15 GMT From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!convex!news.duke.edu!eff!neoucom.edu!kira.cc.uakron.edu!malgudi.oar.net!witch!doghouse!jsalemi@network.ucsd.edu Subject: Wanted: Buckmaster CDROM Callbook BBS DOOR To: info-hams@ucsd.edu In article <2pmt6g$5uk@kaiwan.kaiwan.com>, John W. Herndon (jwh@kaiwan.com) writes: >I was told by tech support at Buckmaster that there was a ONLINE DOOR >that enabled users of a BBS to use the callbook portion of there CD. >Well, I've searched high and low.. and have found.. nothing. > >What I am asking is that if anyone knows of one, please contact me. It's called DOORWAY, and the current version is 2.2. You can find it on most any BBS around that has a lot of files. DOORWAY handles all the necessary video and keyboard translations to make programs that usually write direct-to-screen work over a modem. 73 de KR4CZ ---------- Joe Salemi, KR4CZ Internet: jsalemi@doghouse.win.net Compuserve: 72631,23 FidoNet: 1:109/136 703-548-0928 MCI Mail: 433-3961 ------------------------------ End of Info-Hams Digest V94 #467 ******************************