Re: [Repeater-Builder] DB Bp cans to BpBr for duplexers
Thank you very much. I will look into that. I wonder if db products still makes those cans. 73 - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Sun Jan 03 14:09:32 2010 Subject: Re: [Repeater-Builder] DB Bp cans to BpBr for duplexers Also you may wish to try building dual loop BpBr as described here http://www.repeater-builder.com/antenna/pdf/ve2azx-duplexerinfo.pdf http://www.repeater-builder.com/antenna/pdf/ve2azx-duplexerinfo.pdf Takes more connectors and tees, but you don't have to modify the original cavity. On Sun, Jan 3, 2010 at 1:06 PM, DCFluX dcf...@gmail.com mailto:dcflux%40gmail.com wrote: Havent opened on of the dB cans, but if it is like these sinclairs I have, Replace the ground lug on the coupling loop with a Johansen cap. For VHF you will need the 1-20 caps or 1-30pF. For 220 and UHF use the 2-10pF. This has to do with the split, for me it is about 8pF for the notch to appear on the high side and 16pF for the other on VHF. Remove the opposite loop and replace with a metal plate or a hole plug. Johansens can be obtained from RF Parts, Surplus Sales of Nebraska or Ebay. Just be sure the cap you get will fit, I just got a whole bunch of Russian Johansen clones that are about triple the volume, but won't fit in the can. On Sun, Jan 3, 2010 at 12:43 PM, NORM KNAPP nkn...@twowayradio.net mailto:nknapp%40twowayradio.net wrote: Hi fellas, I need some input... I have 11, yes 11 DB products Bp cans from various combiners. They are 8 in diameter and have the model #SP8145-VT1 or SP8145-VT2 on some of them. I want to turn them into BpBr cans in order to make duplexers out of them. I think I will need some of those little variable caps or is there another way? Where does one get those caps? I think they are made by johanson or something like that. Has anyone ever tried this? Thanks!!! 73 de N5NPO Norm Yahoo! Groups Links
Re: [Repeater-Builder] Mastr II mods and parts
Nate thanks for the info, when put into those terms it makes it obvious I should run the PA maybe just turn it down a bit. I am not sure what kind of duplexers I am going to run so thats still a part of the equasion I do not know yet. Thanks for the words of wisdom it is very helpfull. Greg K9GJN --- On Wed, 1/6/10, Nate Duehr n...@natetech.com wrote: From: Nate Duehr n...@natetech.com Subject: Re: [Repeater-Builder] Mastr II mods and parts To: Repeater-Builder@yahoogroups.com Date: Wednesday, January 6, 2010, 4:27 AM On Jan 5, 2010, at 8:22 PM, Greg Niles wrote: Thanks for the reply Richard. I have the GE 110 watt PA I only antipate needing around 35 watts not going to build a power house just a locat repeater. I know I can detune the PA was just trying to cut out the PA for simplicity purposes if that is possible. Greg K9GJN Greg, Do you want 35W of RF to the antenna AFTER the duplexer? You'll have to put in more than 35W to get 35W out to the antenna in a duplexed system, of course. Or are you really saying that you want 35W into the duplexer where you'll probably only have 10-15W at the antenna after that? (Okay that's an exaggeration but have you forgotten that a duplexer is relatively a very lossy device in your TX chain?) The 110W VHF MASTR II hooked into a properly designed and built antenna system, with low-loss hardline feeding the antenna (and usually backed off a bit from 110W... no need to run it flat out, but you can... they're rated for it), proper low-loss jumpers to the duplexer/antenna system, etc... usually yields just about the right amount of power to make a system balanced with 50W mobiles accessing it. Unless you're purposely trying to restrict the coverage area to where a modern 50W mobile with a typical modern sensitivity receiver can't hear the repeater very well where it can still access it, I'd leave the 110W PA on it. For a MASTR II, the stock .25uV sensitivity of the receiver (if you tune carefully and get factory spec out of it) will mean you usually need to do some work on the receive side (adding a very low noise pre-amp and appropriate large high-Q bandpass cavity in RF noisy environments. ..) to bring the receiver sensitivity up to where HT's can get into it pretty nicely in most of its coverage area in flat-land at 110W, and you'll get those HT's in fine in virtually ALL of it's coverage area if it's up high (mountain, really tall building, etc.) GE built it as a 110W repeater for a reason... think about the users at the time... relatively deaf trunk-mounted radios (made up of the EXACT same components as the repeater) in Public Safety vehicles with external antennas... also often running 110W non-continuous- duty... Anyway, to get back to your question... the UHF 100W PA is hackable where you can easily remove the driver stages and get a lower wattage PA - useful for links, etc... that you know don't need the power. But the VHF has a feedback circuit between the driver section and the first amplification section that must be dealt with to do a similar modification. Just run 'er flat out or up around 85-95W... also consider putting an isolator on it, especially if yours doesn't have the late-model Z-matcher in the Low-Pass-Filter near the PA's output. The VHF is especially sensitive to not being driven into a 50 ohm load and they tend to burn up when they're not. The factory Z-matcher was supposed to alleviate this, but their tuning instructions for the thing leave something to be desired. Easier/more effective to just put an isolator on the PA output with proper filtering... . again, eating some of your RF... so 110W starts to look just about right again... -- Nate Duehr, WY0X n...@natetech. com http://facebook. com/denverpilot http://twitter. com/denverpilot
RE: [Repeater-Builder] something altogether different
Nothing gave me more pleasure than spending my long distance charges on sending fidmail packets from my BBS to the hub in st. Louis that were LADEN with snide remarks straying further and further off topic. You actually *paid* for long distance modem calls back then ??!?? :-) :-) :-) (I ran an Apple ][ BBS running GBBS for about 8 years back in the day...) --- Jeff
RE: [Repeater-Builder] something altogether different
No tone service where I was. :( I first box I actually owned outright is a timex Sinclair 1000 with the 16k ram pak sitting out in the shed/shack Chris Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Jeff DePolo Sent: Wednesday, January 06, 2010 9:56 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] something altogether different Nothing gave me more pleasure than spending my long distance charges on sending fidmail packets from my BBS to the hub in st. Louis that were LADEN with snide remarks straying further and further off topic. You actually *paid* for long distance modem calls back then ??!?? :-) :-) :-) (I ran an Apple ][ BBS running GBBS for about 8 years back in the day...) --- Jeff Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.432 / Virus Database: 270.14.127/2603 - Release Date: 01/06/10 07:35:00
RE: [Repeater-Builder] something altogether different
No tone service where I was. Ha! Whistle up 2600 on an 800 call and the world was your oyster... I first box I actually owned outright is a timex Sinclair 1000 with the 16k ram pak sitting out in the shed/shack Mine was a Trash-80 Model I. I cut my teeth on a VAX-11/750 at a local college before getting the TRS-80. Around the same time I tinkered with a friend's IMSAI 8080. I had one of the Timex-Sinclair's that I got via a discount coupon that came with a case of Maxell betamax video cassettes. Those were the days. My Apple ][ ran a 1 MHz 6502, had 64K of RAM, and I had the unheard-of luxury (for back then) of having a 5 MB hard drive. In contrast, over Christmas I built myself a new workstation based on an overlocked quad-core i7 processor, 6 GB of RAM, 3 TB of storage, etc. and I spent less on it as compared to my Apple ][ rig. My how far we've come... Enough reminiscing, I probably sound like one of those OF's on 80m that talks about their gout, their pension, and what orifice they're having scoped this week, back to real work. --- Jeff WN3A
[Repeater-Builder] What are the advantages and disadvantages of the Mastr IIe system?
Re: [Repeater-Builder] What are the advantages and disadvantages of the Mastr IIe system?
The MASTR-IIe is kinda a hybrid between the MASTR-II and MASTR-III. Essentially, The power supply and system card from the MASTR-III is used with MASTR-II RF hardware. The result is you get a repeater or base station with programable timers, morse code ID and PL/DPL tones, but still uses crystals to set the freqency. Word was this was done because they were waiting on type accepting the IIIs RF hardware and the rest of the III was ready to go and they needed something to sell. I don't know if GE marketed them, but you can mix and match the RF decks to create 10m, 6m and 1.25m MASTR-IIe's. The MASTR-III is only available on 2m, 70cm and 850 Commercial. I have seen people buy the IIe and revert it back to a II for reasons unknown by replacing the min-backplane for the full size one and using the standard 10V card. On Wed, Jan 6, 2010 at 9:31 AM, Bill Isom bil.i...@yahoo.com wrote:
[Repeater-Builder] Re: Service Monitor Input Protection
Blew them out left and right when I was getting started in the business. There was a calibrated isolator that someone sold to replace the 40dB pad on the Cushman. Would handle 50 watts(?) for short periods. WalterH --- In Repeater-Builder@yahoogroups.com, Eric Lowell elowell9...@... wrote: Cushmans used low value fuses for years.  Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@... www.satnetmaine.com 207-210-7469 From: James ka2...@... To: Repeater-Builder@yahoogroups.com Sent: Tue, January 5, 2010 5:30:00 PM Subject: [Repeater-Builder] Service Monitor Input Protection  Hello to the group. Knowing most of you have service monitors for the Repeater Builder Hobby, I wanted to pose the following question. What method do you use to protect the input of your service monitor from excessive RF Power input? I am referring to the input/output jack that is limited to 2.5 watts on MANY service monitors. I know I can use an attenuator, but that gets removed for sensitivity checks and may not get put back on. One suggestion is a RF Relay that would trip on say one watt and put the power to a dummy load. The problem is I have used one of the cheap circuits in the past and toasted transistors in a Pre-amp, before the relay reacted as the book said it should. However I know there are circuits in say the Mirage Amp that also has a Pre-Amp that is removed from the antenna during transmit, that works well. What are you doing to protect your monitor? Appreciate your thoughts. 73 JIM KA2AJH
[Repeater-Builder] Re: What are the advantages and disadvantages of the Mastr IIe system?
How are/were the MIIe programmable values programmed? s. DCFluX dcf...@... wrote: The MASTR-IIe is kinda a hybrid between the MASTR-II and MASTR-III. Essentially, The power supply and system card from the MASTR-III is used with MASTR-II RF hardware. The result is you get a repeater or base station with programable timers, morse code ID and PL/DPL tones, but still uses crystals to set the frequency. Word was this was done because they were waiting on type accepting the IIIs RF hardware and the rest of the III was ready to go and they needed something to sell. I don't know if GE marketed them, but you can mix and match the RF decks to create 10m, 6m and 1.25m MASTR-IIe's. The MASTR-III is only available on 2m, 70cm and 850 Commercial. I have seen people buy the IIe and revert it back to a II for reasons unknown by replacing the min-backplane for the full size one and using the standard 10V card. On Wed, Jan 6, 2010 at 9:31 AM, Bill Isom bil.i...@... wrote:
Re: [Repeater-Builder] Re: What are the advantages and disadvantages of the Mastr IIe system?
Through the DB-9 on the rear of the mini backplane On Wed, Jan 6, 2010 at 11:07 AM, skipp025 skipp...@yahoo.com wrote: How are/were the MIIe programmable values programmed?
Re: [Repeater-Builder] something altogether different
On Jan 6, 2010, at 9:31 AM, Jeff DePolo wrote: Enough reminiscing, I probably sound like one of those OF's on 80m that talks about their gout, their pension, and what orifice they're having scoped this week, back to real work. This comedian pretty well covers it... and his rotary dial phone comments near the beginning are hilarious... You hated people with zeros in their phone numbers. http://www.youtube.com/watch?v=rOtEQB-9tvk TRS-80 Color Computer Model 1 for me... 16K RAM, cassette tape for storage. :-) -- Nate Duehr, WY0X n...@natetech.com http://facebook.com/denverpilot http://twitter.com/denverpilot
[Repeater-Builder]
---BeginMessage--- What, you ask, is 'Butt dust'? Read on and you'll discover the joy in it! These have to be original and genuine. No adult is this creative!! JACK (age 3) was watching his Mom breast-feeding his new baby sister... After a while he asked: 'Mom why have you got two? Is one for hot and one for cold milk?' MELANIE (age 5) asked her Granny how old she was... Granny replied she was so old she didn't remember any more. Melanie said, 'If you don't remember you must look in the back of your panties. Mine say five to six.' STEVEN (age 3) hugged and kissed his Mom good night. 'I love you so much that when you die I'm going to bury you outside my bedroom window.' BRITTANY (age 4) had an ear ache and wanted a pain killer. She tried in vain to take the lid off the bottle. Seeing her frustration, her Mom explained it was a child-proof cap and she'd have to open it for her. Eyes wide with wonder, the little girl asked: 'How does it know it's me?' SUSAN (age 4) was drinking juice when she got the hiccups. 'Please don't give me this juice again,' she said, 'It makes my teeth cough..' DJ (age 4) stepped onto the bathroom scale and asked: 'How much do I cost?' CLINTON (age 5) was in his bedroom looking worried When his Mom asked what was troubling him, he replied, 'I don't know what'll happen with this bed when I get married. How will my wife fit in it?' MARC (age 4) was engrossed in a young couple that were hugging and kissing in a restaurant. Without taking his eyes off them, he asked his dad: 'Why is he whispering in her mouth?' TAMMY(age 4) was with her mother when they met an elderly, rather wrinkled woman her Mom knew. Tammy looked at her for a while and then asked, 'Why doesn't your skin fit your face?' JAMES (age 4)was listening to a Bible story. His dad read: 'The man named Lot was warned to take his wife and flee out of the city but his wife looked back and was turned to salt.' Concerned, James asked: 'What happened to the flea?' The Sermon I think this Mom will never forget:: This particular Sunday sermon...'Dear Lord,' the minister began, with arms extended toward heaven and a rapturous look on his upturned face.. 'Without you, we are but dust...' He would have continued but at that moment my very obedient daughter who was listening leaned over to me and asked quite audibly in her shrill little four year old girl voice, 'Mom, what is butt dust?' ---End Message---
[Repeater-Builder] GE-MASTRexecII 2-MARCv's misc. bits for sale, BSA donation
For Sale, donated to BSA, LA/SoCal Venture Crew-One:
3 GE mobiles (like PD, trunk mount);
1 MASTR EXECUTIVE II
SERIAL: 0385878 SPL SHIP DATE 102
COMBINATION: WVR16HS MOD STATUS * 2 3 * * * *
FCC XMTR DATA XT169-A 8 9 10 11 12 13 14 15 16
FCC RCVR DATA ER89-A (UHF Connector on front, extra [rcv?] coax)
1 cable to mate with front, 12-molex (3x4)+ DC+/-, +BNC-RCA thru pnl.
combo# deciphers to - ??
2 GE MARC V (Wikipedia: 806-869MHz 'scan-based trunking'?)
SERIAL: 0304202 'CLUNK' INSIDE --Loose module? (LOCKED)
COMBINATION: M2YTL5ZOXX (N Conn on front)
FCC XMTR DATA XT-187-A
FCC RCVR DATA ER-117-A
combo# deciphers to:
M At http://www.hallelectronics.com/getech/m21.htm
2
Y Synthesized
T +12V
L Local
5 21-40Watts
Z 20 Channels
0 No Channel Plan
X Channel Block = as specified; ?
X Start Channels = as specified; ?
SERIAL: 0331391 (LOCKED)
COMBINATION: M2YTL5M0XX (N Conn on front)
FCC XMTR DATA XT-187-A (1 BENT PIN, JONES' PART OF CONNECTOR)
FCC RCVR DATA ER-117-A
combo# deciphers to:
M
2
Y Synthesized
T +12V
L Local
5 21-40Watts
M 10 Channels
0 No Channel Plan
X Channel Block = as specified; ?
X Start Channels = as specified; ?
for these two, LBI30843 Control Unit
LBI30839 Comb Manual
LBI30895 Comb Manual - Synth
LBI30875 Transmitter 10W
LBI30872 Transmitter 25, 35W
LBI30930 Transmitter 25, 35W Synth
LBI30480 Receiver
1 FIBERGLAS CASE, MIL-GRAY, 20-1/2Lx16Wx11-1/2'D, #64138;
HOLES RTV ON BACK, CONTAINING:
2 CUBIC MICROPHONES, 113-007 (HAND MIC, 4-PIN AMPHENOL)
1 CUBIC COMMUNICATION VHF-20-2 S/N [V-20-2 166]
CH. 1, 2; SQUELCH, VOLUME, TRANSMIT LED 'OCEANSIDE'
4-PIN MIC CONN ON L. SIDE;
'ANT' UHF CONN, 'PWR' MOLEX-2+FUSED WIRES, 'EXT SPKR' 3.5mm JACK ON BACK
TOP-MOUNTED ON A PLATE; BENDIX TJS-308 S/N 9 ASSY 1061323,
WITH 7 MODULES OF 8; 1 EMPTY DE-9S 'J8', DB-25P 'J9', PLUS:
J4 GOLD, NO LABEL; '1,3' ('1.2438')
J3 .96KC
J2 .73KC
J1 (ORANGE) 'GAIN, TEST' BENDIX TAA-305
J8 ---
J7 3.0KC GREEN BENDIX
J6 2.3KC VECTOR (NORDEN) SUBCARR. OSC
J5 1.7KC BENDIX TOE-30S
1 WILMORE 134D DC/DC, 26+/-4 Vin, 13.8V @6a OUT (MOUNTED ON SIDE)
13 BNC FEEDTHRUS; IN LID, AMP MODULE (IN, OUT, RESET +/-15, +2IN, +18,
+/-12 OUT
1 DYNATECH A-B SWITCH S/N 1672; A,B=DB-25P, 'IN/OUT'=DB-25S
1 PS2 OUTPUT +15V @10A, INPUT DC 9.2~16V
DC-DC CONVERTER, INTERNATIONAL POWER SOURCES INC, ASHLAND MN
DCF 103 508/881-7434
1 6 GOOSENECK MOUNT, NIB; SLN 5216C; 2 FLANGES, SCREW BAG
1 hp 3304A SWEEP/OFFSET PLUG-IN SN 732-01291, u-BLUE-RIBBON50 ON BACK
1 DE-9P-to-S SERIAL CABLE ~9-10ft
2 EA MOLEX MINI-9 F-F CABLES, BELDEN 9455 ~12ft
1 REALISTIC 200-OHM DYNAMIC MIC (ON/OFF),
SPLICED TO TWO RG-58/U, WITH BNC PLUGS AND STAND
2 RG-59/U BNC-BNC
4 RG-58/U BNC-BNC
1 LONG WEATHERED (RG-58/U?), BNC-STRIPPED END
2 ASSY'S STEREO 1/4 PLUG - TAPED PCB + BNC JACK, ~4ft STEREO CBL
1 ASSY, MONO 1/4 PLUG - RCA PLUG + 3.5mm MONO, MINI-GATOR CLIPS
1 MA/COM IND. AB-2 CABLE-TV SWITCH (F-CONN'S ON BACK)
1 MOTOROLA TRN5502AH (NIB) ADJ. ANGLE MOUNTING BRACKET ~2.5x2.5
1 ARCHER LINE FILTER
1 RCA-RCA CABLE
2 EA RED BLACK MONO 1/4 LINE JACKS
1 EA RED BLACK MONO 1/4 LINE PLUGS
1 MONO 1/4 SPLITTER, 1 PLUG - 2 JACKS
1 12V LIGHTER PLUG
1 ARCHER CABLE-F TO UHF-VHF-FM TWINLEAD BALUN
1 UHF JACK - BRASS STUD
2 BAGS MISC. HARDWARE
1 WACOM WP-641 (144-174MHz, BpBr Circuit DUPLEXER, 4-CAN) Serial 19900-A
[DATASHEETS AND TUNEUP INSTRUCTIONS ON REPEATER-BUILDER.COM, Thanks!]
SEVERAL ROLLS OF HELIAX-TYPE COAXIAL CABLE, SOME RG-8/U, AND
SOME 3- AND 8-CONDUCTOR CONTROL/ROTOR CABLE, all used, weathered;
Heliax: 1-1/8OD, CABLEWAVE SYSTEMS 16733-810919-001-FLC-78-50J-040
3 ROLLS; 43AvgDia X 6TURNS == 1621 N-f one end = 135'
(Lengths 52 X 9T == 2940 = 245'
approx) 40 X 19T == 4775 = 398'
12-CONDUCTOR SOLID IN RECTANGULAR HEAVY BLACK JACKET:
CSI (UL) 1996 P, 15 X 27T == 2544 = 212'
19 X 57T == 6804 = 567'
RG-8/U COAXIAL CABLE, (NO OTHER MARKINGS), PL-259 one end:
16 X 13T == 1307 = 109'
[Perimeter = 2 x PI x Dia; Approx.L = Perimeter x turns, L'(ft) = L/12]
GE Cabinet, 72H x 22W x 23D Front back doors, locks, side N-feedthru
+Casters Power strip (wired to back inlet), 2x6 bottom planks
Back door label: Station Comb VT75YAS88
Tx Type ET-60C Option 7466
Serial 3231183
--
'---O=o=O---'
73, Phil Barnes-Roberts WA6DZS Mailto:pbarnrob at acm dot org
“Wee fish ewe a mare egrets moose panda hippo gnu deer!”
--Skeezix47 at Pibgorn
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Re: [Repeater-Builder] something altogether different
At 1/6/2010 10:56, you wrote: On Jan 6, 2010, at 9:31 AM, Jeff DePolo wrote: Enough reminiscing, I probably sound like one of those OF's on 80m that talks about their gout, their pension, and what orifice they're having scoped this week, back to real work. This comedian pretty well covers it... and his rotary dial phone comments near the beginning are hilarious... You hated people with zeros in their phone numbers. http://www.youtube.com/watch?v=rOtEQB-9tvk I recently had FiOS service installed, which means my wired phones plug into an ONT installed here. Wondering if the box supported pulse service not owning a rotary phone (I'm not an antique collector), I picked up my touchtone phone hand-pulsed the hook to dial my wife's cell phone. It worked. Bob NO6B
Re: [Repeater-Builder] something altogether different
Ah yes... haven't tapped out a number in years. Used to run in to phones with no dials once in a while. Chuck WB2EDV - Original Message - From: n...@no6b.com To: Repeater-Builder@yahoogroups.com Sent: Wednesday, January 06, 2010 9:48 PM Subject: Re: [Repeater-Builder] something altogether different Wondering if the box supported pulse service not owning a rotary phone (I'm not an antique collector), I picked up my touchtone phone hand-pulsed the hook to dial my wife's cell phone. It worked. Bob NO6B
RE: [Repeater-Builder] something altogether different
I have two old rotary phones, one is an old fashioned wooden wall mount that was built in the 60s. Richard http://www.n7tgb.net/ www.n7tgb.net It does not take a majority to prevail ... but rather an irate, tireless minority, keen on setting brushfires of freedom in the minds of men. --Samuel Adams _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Wednesday, January 06, 2010 7:00 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] something altogether different Ah yes... haven't tapped out a number in years. Used to run in to phones with no dials once in a while. Chuck WB2EDV - Original Message - From: n...@no6b.com mailto:no6b%40no6b.com To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Sent: Wednesday, January 06, 2010 9:48 PM Subject: Re: [Repeater-Builder] something altogether different Wondering if the box supported pulse service not owning a rotary phone (I'm not an antique collector), I picked up my touchtone phone hand-pulsed the hook to dial my wife's cell phone. It worked. Bob NO6B
[Repeater-Builder] Motorola R 2600 Service Monitor Comments/Price??
Hello to the group. I have an oppurtunity to purchase a Motorola R 2600 Service Monitor. It has the monochromatic screen, tracking gen, etc. It seems to be in working order, reminds me of the HP 8920a I had for a short time. Does anyone have any comments about this unit? Are they reliable in hilltop service? Any comments on what current pricing should be? My 1500S needs repair and I have a CE 6030a that isn't doing to well either. Both of then need a trip to the doctor and I don't even want to think about what that will run me. Any comments on service facilities for these units? Any comments would be appreciated. Thanks in advance. John AB6LI
