Re: [Repeater-Builder] Re: Milcom International UHF PA
Thanks again!! Adam N2ACF On 6/7/2010 8:31 AM, Jeff DePolo wrote: > > No, just fill out the RMA form from their web site. You might want to ask > for an estimate or quote before you send the unit in, but they'll want the > RMA form first. > > --- Jeff WN3A > >
Re: [Repeater-Builder] Re: Milcom International UHF PA
Hi Jeff, Thanks for the reply. I too, thought that it was drawing a little too much current. The unit has a sticker on it that says 450 to 470 and I'm testing it with a MastrII exciter on 442.800. So, you're probably right in what's going on. I'm going to see if I have an ICOM for my 449.875 repeater and if so, test it on that frequency. Hopefully, I'll see the current draw go down and then know for sure what's going on. If I want the caps changed, is there anyone in particular at Crescend I need to talk to? I wasn't aware that they would support the Milcom line. Thanks!! Adam N2ACF On 6/6/2010 10:26 AM, Jeff DePolo wrote: > 28-29 amps is on the high side. Are you using the amp at more than maybe 5 > MHz or so from the original frequency? Some of the Milcom/Crescend amps are > tunable, but many used fixed-value metal-clad mica capacitors in the base > and collector matching. The values of the caps and/or their placement along > the microstrips is varied depending on frequency. > > While you could experimentally determine the right values/placements using > common sense techniques, it's probably easier just to send it to Crescend to > have them move it to your frequency. I have a 350 watt Vocom UHF amp that > had the same issue - fixed caps. After counting how many caps I'd have to > futz with, I concluded it was cheaper to send it to them and letthem do it > for $200. They turned it around in about a week. > > If you need 250 mW in and 100 watts out, a Mastr II PA would do you nicely > (and cheaply!). > > --- Jeff WN3A > > > > >> -Original Message- >> From: Repeater-Builder@yahoogroups.com >> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Adam Feuer >> Sent: Saturday, June 05, 2010 11:35 PM >> To: Repeater-Builder@yahoogroups.com >> Subject: Re: [Repeater-Builder] Re: Milcom International UHF PA >> >> >> >> Hi Alex, >> >> Thanks for the reply! Your description of the pots was great but I >> don't see ANY tuning caps on any boards in this amp. There's a 10watt >> board that feeds a 65w board. Then, this 65w board gets split to feed >> two more 65w boards which get combined as the final output. >> >> I can easily set R10 to 100 watts but I would like more info on the >> tuning caps if it's applicable to this amp. At 100 watts the amp is >> drawing about 28 to 29 amps. I may be incorrect but I thought >> some of my >> other 250mw in 100w out PA's only draw 22 amps. >> >> Thanks again! >> >> Adam N2ACF >> >> On 6/5/2010 6:04 PM, opelgtalex wrote: >> >>> Adam- >>> R10 controls the bias voltage to the first stage driver- >>> >> this sets the power out of the amp. Turn this pot down (lower >> the PA output) peak out all tuning caps starting at the 1st >> stage, then the 2nd and on to the 4 driver boards. Once all >> tuning caps are adjusted for peak output, then adjust R10 for >> the amplifiers rated power out (100W in your case). >> >>> R9 controls the foldback power in case of a high temp >>> >> condition the power output is cut by 3dB- the thermal switch >> is located just below the control board. >> >>> As per manual R9 is adjusted by removing power from the >>> >> cooling fan, key the RF source, wait for the unit to reach >> 135deg F and adjust R9 for 3dB below rated amp output- this >> is per manual. >> >>> Hope this helps, >>> Alex >>> >>> --- In Repeater-Builder@yahoogroups.com >>> >> <mailto:Repeater-Builder%40yahoogroups.com> , Adam >> Feuer wrote: >> >>> >>>> Hello All, >>>> >>>> I have a Milcom International UHF PA on the bench. Model number is >>>> P12-O5HA1-C1 rated at 250mw in with 100w out. I'm trying >>>> >> to identify >> >>>> what two pots (R9& R10) do on a board that "seems" like a control >>>> board. Both pots appear to vary the output power and current draw, >>>> although one does it more dramatically than the other. >>>> >>>> Anyone have a manual or information for this PA? Any help would be >>>> greatly appreciated. >>>> >>>> Thanks!! >>>> >>>> Adam N2ACF >>>> >>>> >>>> >>> >>> >>> >>> >>> >>> >>> Yahoo! Groups Links >>> >>> >>> >>> >>> >>> >> >> >> >> >> > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Re: Milcom International UHF PA
Hi Alex, Thanks for the reply! Your description of the pots was great but I don't see ANY tuning caps on any boards in this amp. There's a 10watt board that feeds a 65w board. Then, this 65w board gets split to feed two more 65w boards which get combined as the final output. I can easily set R10 to 100 watts but I would like more info on the tuning caps if it's applicable to this amp. At 100 watts the amp is drawing about 28 to 29 amps. I may be incorrect but I thought some of my other 250mw in 100w out PA's only draw 22 amps. Thanks again! Adam N2ACF On 6/5/2010 6:04 PM, opelgtalex wrote: > Adam- > R10 controls the bias voltage to the first stage driver- this sets the power > out of the amp. Turn this pot down (lower the PA output) peak out all tuning > caps starting at the 1st stage, then the 2nd and on to the 4 driver boards. > Once all tuning caps are adjusted for peak output, then adjust R10 for the > amplifiers rated power out (100W in your case). > > R9 controls the foldback power in case of a high temp condition the power > output is cut by 3dB- the thermal switch is located just below the control > board. > As per manual R9 is adjusted by removing power from the cooling fan, key the > RF source, wait for the unit to reach 135deg F and adjust R9 for 3dB below > rated amp output- this is per manual. > Hope this helps, > Alex > > --- In Repeater-Builder@yahoogroups.com, Adam Feuer wrote: > >> Hello All, >> >> I have a Milcom International UHF PA on the bench. Model number is >> P12-O5HA1-C1 rated at 250mw in with 100w out. I'm trying to identify >> what two pots (R9& R10) do on a board that "seems" like a control >> board. Both pots appear to vary the output power and current draw, >> although one does it more dramatically than the other. >> >> Anyone have a manual or information for this PA? Any help would be >> greatly appreciated. >> >> Thanks!! >> >> Adam N2ACF >> >> > > > > > > > > Yahoo! Groups Links > > > > >
[Repeater-Builder] Milcom International UHF PA
Hello All, I have a Milcom International UHF PA on the bench. Model number is P12-O5HA1-C1 rated at 250mw in with 100w out. I'm trying to identify what two pots (R9 & R10) do on a board that "seems" like a control board. Both pots appear to vary the output power and current draw, although one does it more dramatically than the other. Anyone have a manual or information for this PA? Any help would be greatly appreciated. Thanks!! Adam N2ACF
Re: [Repeater-Builder] Motorola Spectra
This has been explained a few times before - Motorola ordered tags from a sub-contractor, and they mixed up the actual model numbers with the ID numbers for a few different series of radios - just transpose the ID number with the model number and you'll have the number you need - At 10:58 PM 6/4/10 -0700, you wrote: >At 07:41 AM 06/03/10, you wrote: >>I'm trying to find out the spec's on a model# TA9FW+079W. Contact me >>of line at kc...@cox.net >>John > >That's the new format model number, and I've never >seen a Rosetta Stone for it. > >I suggest that you ask the person for the "ID number " >from the same model tag. It has some useful info. > >See this article: ><http://www.repeater-builder.com/motorola/motorola-suffixes.html> >and scroll down a little more than half way - you will >see photos of seven different model tags. > >Mike WA6ILQ - Adam -
[Repeater-Builder] Micor 900mhz Receiver Board
Anyone have a TRF1032A that they would like to sell / part with. I'll take it with or without the housing, whichever is easiest for you to unload. Thanks in advance! Adam N2ACF feu...@optonline.net
[Repeater-Builder] Voters...the LDG Relay
All of the recent chat about voters and a recent trip to my site has reminded me of a question regarding the LDG. Mine has been in service for about 8 years now and just recently hearing the relay clicking has got me wondering: Has anyone had a relay failure in the LDG? If so, were you able to get an exact replacement or did you opt for an alternate method? Any thoughts or experiences would be greatly appreciated. Adam N2ACF
Re: [Repeater-Builder] Re: Syntor X9000 Programming
At 03:42 PM 4/4/10 -, you wrote: > >> ... to program the Syntor X9000, you will need a Motorola RIB >> Box (small box with some interface circuitry that will convert >> your PC's RS-232 port to logic levels the radio wants to see). >> You will also need a cable that goes from the RIB to the radio. > >> > since you don't need the almost-impossible-to-find suitcase >> > programmer for the plain Syntor or the Syntor X... you just >> > connect a slow PC or a laptop to the X9000 and program it. > >Actually, the "slow pc" is not a requirement. Just a PC with the >proper programs installed and configured. My problem with newer computers is/was always the com port - newer chipsets are a little too fast to talk to the radio - guess I'll have to grab a ToughBook and check those out - everyone's mileage always differs here... ... and 8086 laptops are still cheap at the swaps... >I use a very fast Panasonic CF-52 Tough-book booting to a USB >Thumb Drive (formatted DOS) to Program Syntor X9000 Radios. > >Works just fine... no moslo or other speed reducing programs. >The key is to remember turning off your Processor Memory >Caching. > >cheers, >skipp > >skipp025 at yahoo.com > > > > > > > >Yahoo! Groups Links > > > > - Adam -
[Repeater-Builder] Motorola GM950 Mobile
Hello All, Would anyone happen to have a service manual to a Motorola GM950 mobile? Band split is not relevant as I'm specifically looking for the part number of that radio's antenna jac. Any help would be greatly appreciated. Thanks!! Adam N2ACF
Re: [Repeater-Builder] Cold temps and repeaters
You might want to inspect your connectors first to see if you have any moisture going into the connectors good Amp connectors help out with extremes. Used to have a repeater in NYC. When it snowed or got wet, it squealed and grunted with 9914. Swapped out the old cabe to the good stuff Heiiax and only the connectors gave up problems. On 2010-01-03, George Henry wrote: > I remember the 146.79 repeater in Henrietta (Rochester) NY back in the > mid/late 70's It was housed in an old 'fridge in a shed in the middle > of a farm field, at the base of the tower. IIRC, it had a fan to cool it in > the summer, and a 25-watt light buld to keep it warm in the winter. > > KISS at it's best. > > > George, KA3HSW / WQGJ413 > > > - Original Message - > From: "Chuck Kelsey" > To: > Sent: Sunday, January 03, 2010 2:58 PM > Subject: Re: [Repeater-Builder] Cold temps and repeaters > > > I've seen it happen. Changes in temperature can affect the stability of a > transmitter causing it to spur. Intermod sources can come and go with > weather changes as well. It's 12 chilly degrees here in western New York and > the snow has been heavy all day. 45 would be a heat wave ;-) > > Chuck > WB2EDV > >
Re: [Repeater-Builder] 220 repeater
How much is it for someone to build a 4 can 220 duplexer. From: Steven M Hodell To: Repeater-Builder@yahoogroups.com Sent: Sat, January 2, 2010 9:16:10 AM Subject: Re: [Repeater-Builder] 220 repeater Hi Brain, I have 220 cavities available and can build a duplexer (tuned to your frequency pair) if needed. Contact me directly if you would like more information. Steve. - Original Message - >From: K5IN >To: Repeater-Builder@ yahoogroups. com >Sent: Saturday, January 02, 2010 3:18 > AM >Subject: Re: [Repeater-Builder] 220 > repeater > > >Good evening, > > >Your e-mail brings up one question: used > duplexers for 220 where? > > >Brian >- Original Message - >>From: Oz-in-DFW >>To: Repeater-Builder@ yahoogroups. com >>Sent: Friday, January 01, 2010 9:40 >>PM >>Subject: Re: [Repeater-Builder] 220 >>repeater >> >> >>Micor conversions work very well, but are rather >>involved. >> >>MVP/Exec/Mastr II conversions are much easier and work as >>well. The MVP package works out really well. >> >>Both the Motorola >>and GE radios rely on a different PA. Most use a hybrid "brick" to get >>power. I have several of these I've been getting $25/ea for. >>WA5VJB did a nice interface board for them. >> >>There are also a >>number of Kyodo/Nokia BSR 220 radios out there. I sold a bunch of them, >> but >>I don't think I have any more. Might have one. They are almost as good >>as the Moto/GE option and are synthesized. An EPROM sets the operating >>channels. I have docs if you need them. >> >>There are a lot of surplus >>duplexers and combiners floating around from failed 220 trunking >>systems. Keep an eye peeled. DB built a short vhf high split duplexer >>that's a snap to convert to 220. If you find a narrow spaced six can >>dupe on a channel above 160 Mhz that is about 12 or 14" tall, it's >>probably one of these. >> >>Oz >> >>On 1/1/2010 10:32 PM, Dan >>Blasberg wrote: >> >> >>>All right folks, >>> >>>For those that run a 220 repeater, what are you >>> running as far as the >>>machine itself? >>> >>>A local group is looking >>> to put a 220 MHz repeater on the air and >>>would like some >>> ideas. >>> >>>Thanks, >>> >>>Dan >>>KA8YPY >>> >> >>-- >>mailto:o...@ozindfw. net >>Oz >>POB 93167 >>Southlake, TX 76092 (Near DFW Airport) >> >> >> >>
Re: [Repeater-Builder] Re: ACC RC-85 QUESTION.
To reactivate your missing features (Female Voice, Schedular, etc) Simply key your mic and enter the Secret Code 9213528835. The controller will respond with OK. This does not require the controller be unlocked. DO NOT UNLOCK THE CONTROLLER. kc9gmh this worked on my 85 it did the same thing that yours was doing. From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Fri, January 1, 2010 10:16:17 PM Subject: [Repeater-Builder] Re: ACC RC-85 QUESTION. Chances are... (cause I wear a silly grin...) depending on the age of your EEprom chip, it might be tired, failing and need replacement. If the voice messages are set up to play as macros under DTMF Command then it's probably one of a few things. Failing to act on a DTMF Command might be a level issue. But the wrong/no voice response to a regular controller function is once again probably more related to the EEprom starting to go south. There are a few other possible options. There are two Yahoo ACC Controller Groups, both have many of the same members, one is larger than the other and sees more action. I might encourage you to locate and join at least the larger of the two. I can and would burn a replacement EEprom for you if you supply the EEprom and pay the postage. Paul at ACC Repairs also sells preloaded chips and that's a fast and great way to go. Plus Paul is a nice guy although we don't normally tell him that in public. s. > "W8YSU" wrote: > > Did anyone have any problems after the new year? > Our controller will not take any codes to set the time and the date. > > also some of the voice messages are not playing right. > > > > Thanks, > > DEAN > W8YSU > YNG, OHIO > W8QLY REPEATER >
Re: [Repeater-Builder] UHF Mastr II PA - SLOW
Jeff, Thanks for the thought which is something I did not check. (nor do I know how at the moment, I'll have to find the book) I did check the obvious solder connections that usually fail and even re-flowed them. The POT "seems" ok as when the amp finally does reach full power, the POT varies the output power just fine. Again, this amp is extremely clean and quite healthy once it finally reaches full power. Back to the bench tonight....Thanks!! Adam N2ACF Jeff DePolo wrote: >> After letting it cool, I key'd it up again. It immediately went up to >> only 20 watts, then after about 30 seconds it hit 75 watts >> and finally >> after close to a minute and a half, it hit 100 watts. I let it cool >> again, and same thing. This appears to be the way this amp is as >> nothing I can do can get it to change. I checked the exciter and >> immediately upon being key'd it puts out 220 mw. >> >> Any thoughts or suggestions would be greatly appreciated. >> > > I'll give you the same recommendation as I would give anyone with a > varying-power problem on an amp with power control circuitry - meter the > controlled stage voltage! If it's constant, then you have an RF problem > (bad connections between boards, a failing component, etc.). If it's > varying in correlation to the change in power output, then the control > circuitry is causing it (possible causes include the power control pot, > thermistor, power control hybrid, pass transistor, etc.). Divide and > conquer is your best technique, and this is an important first step. > > --- Jeff WN3A > > > > > > > > Yahoo! Groups Links > > > > >
[Repeater-Builder] UHF Mastr II PA - SLOW
Hello All, I have on the bench into a dummy load an exceptionally clean Mastr II 100 watt UHF PA. It appears to be a "late model" version because it has the Z-Match board right above the RF output connector. At 13.6 volts and 21 amps, it's doing 100 watts easily. I can vary it down all the way and vary it up to about 128 watts. So, to me it seems like it's in good shape. I left it key'd for 30 minutes and the current and power output stayed the same, 21 amps and 100 watts. After letting it cool, I key'd it up again. It immediately went up to only 20 watts, then after about 30 seconds it hit 75 watts and finally after close to a minute and a half, it hit 100 watts. I let it cool again, and same thing. This appears to be the way this amp is as nothing I can do can get it to change. I checked the exciter and immediately upon being key'd it puts out 220 mw. Any thoughts or suggestions would be greatly appreciated. Thanks!! Adam N2ACF
[Repeater-Builder] Re: OT - re: contest replies to callers...
...I have been called an 'ass' before ... ... Shut up, Jeremy, ... At 03:56 PM 11/21/09 -, you wrote: >If you're really an OF like me... you also add the >"PSE QSL VIA THE BURRO". > >ok gd luck in the contest... >S. > >> "Adam T. Cately" wrote: >> SOooo - you're a code-maven, too, Skipp? >> When I run the local nets (or mostly, when I'm trying >> to corral a rag-chew on the local frequencies) my >> favorite response to a check-in is - >> >> "You're 5-9-plus, but I need a repeat on your suffix >> and your station location, this is KB8MDF..." >> >> I hear this all the time on HF voice - contest replies >> that suggest you were full-scale, full-quieting, fully >> readable, but the returning station needs a repeat on >> your pertinent information. >> If a station is "5-9-plus", why would you need a repeat? >> (sorry - just a black-sheep musing on a dreary Saturday morning) >> Please carry forth... >> - Adam - > >> >s. >> >(you're 5,9,9 - good luck in the contest) > > > > > > > > >Yahoo! Groups Links > > > > - Adam -
[Repeater-Builder] OT - re: contest replies to callers...
>s. > >(you're 5,9,9 - good luck in the contest) SOooo - you're a code-maven, too, Skipp? When I run the local nets (or mostly, when I'm trying to corral a rag- chew on the local frequencies) my favorite response to a check-in is - "You're 5-9-plus, but I need a repeat on your suffix and your station location, this is KB8MDF..." I hear this all the time on HF voice - contest replies that suggest you were full-scale, full-quieting, fully readable, but the returning station needs a repeat on your pertinent information. If a station is "5-9-plus", why would you need a repeat? (sorry - just a black-sheep musing on a dreary Saturday morning) Please carry forth... - Adam -
Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)
If'n I remember correctly... Fred Vobbe built his own 6m loop antennas for his repeater array - maybe someone could arm-twist him for his story about the antennas and harness. (Sorry Fred - I know you'se busy...) At 06:28 PM 11/16/09 -, you wrote: >Yes please Jeff... > >thanks >skipp > > >> "Jeff DePolo" wrote: >> I have dimensional data for both Decibel and Celwave >> lowband folded dipoles *somewhere*. If there's interest >> I'll hunt for them. >> >> I think the Celwave design (with the "stingers") would be easier to >> fabricate - no bending involved. >> >> --- Jeff WN3A >> - Adam -
[Repeater-Builder] need info on old SSC Inc. Encoder/Decoder boxes
I'm looking for some info on these old Solid-State Communications, Inc. encoder/decoder boxes that I need to change tones in - the decoder decodes two-tone and bumps the encoder to encode the same two-tones into the base station it's connected to. The model numbers are: Decoder - #224BY-3 / Encoder - #237AY-1. I've figured out how to move the encoder tones up to where I need them, now I just need to move the decoder to follow along. Any help would be greatly appreciated. Reply here or reply direct. Thanks bunches! - Adam -
[Repeater-Builder] Mastr II IFAS Board
Hello All, Today, I came in possession of a Mastr II low band receiver on 33mhz for a 10 meter project that I'm working on. What caught my eye right away on this particular receiver was the IFAS board. This board looked dramatically different from all those I have seen before. There were numerous 14 pin IC's, only one audio device mounted on the side, and no transformer. The part number on this board is 19D902492G2 Rev F. I'm wondering if anyone has any experience in the use of this board as pertains to squelch action. Were there any improvements or anything that might have made things worse? I know pretty much what to expect with the "other" (maybe older?) style IFAS boards but this one is new to me. Any information would be greatly appreciated. Thanks! Adam N2ACF
[Repeater-Builder] Re: Closed Repeaters
> > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Alan Rabin > Sent: Sunday, July 26, 2009 1:57 PM > To: Repeater-Builder > Subject: Re: [Repeater-Builder] Re: Closed Repeaters > > > > > Please excuse Me. I feel compelled to make this one comment. Consider for a > moment the fact that when one employs a repeater, they are effectively > sitting on two Amateur frequencies within a given geographic area. If I were > to claim two Amateur frequencies let's say for instance on the HF band, and > tell others they cannot use them what would most of us say? I for one would say you were working split. 73! -Adam WJ4X
Re: [Repeater-Builder] Micor Bi-Level Squelch Circuit
I am a very big fan of the Micor bi-level squelch. It's action is second to none on my 440 and 900 system however, I too am having the exact same problem on my 29.540 receiver in carrier squelch. I just will not take anyone into the noise but rather near quieting signals just "pop out" and disapear under the squelch. I have tried cleaning all of the pins and swapping out the audio control module but nothing seems to help. Interesting enough, this is NOT happening on my 6 meter Spectra Tac! At the moment, I have placed my 29.540 Spectra Tac aside and replaced it with a GE Mastr II auxiliary receiver on 10 meters. The results are much better as pertains to the squelch, but this is not to start a Micor vs. Mastr II comparison.something is just not right on 10 meters with a Spectra Tac receiver. If it can work on all of the other bands (especially six meters!) it should work on 10. If anyone has any suggestions, perhaps some part changes on the audio control module, they would be greatly appreciated! Adam N2ACF kq2h wrote: > I've been impressed with the operation of the Micor bi-level squelch circuit > based on the M7716 IC. I use Micor Spectra-Tac receivers exclusively on 440, > 902, 6 Meters and 222 MHz (VHF to 222 conversion) with excellent results. > However, I am perplexed by 10 Meters. The Spectra-Tac squelch circuit doesn't > work well at all. It squelches up on fading signals that aren't all that > noisy and drops out for no apparant reason. It appears that the squelch is > set too high, but it isn't. I've tried different audio/squelch modules, > receiver boards and housings. Even the IMTS modification which defeats the > short squelch tail doesn't help the situation. When a UHF reciever is > substituted in place of the 10 Meter receiver, the squelch circuit works > fine. > > An old 25-30 MHz Motrac receiver, with its simple 3 transistor squelch > circuit, works perfectly on 10 Meters. There are no problems with drop outs. > The receiver squelch remains open well into the noise. This leads me to > believe that the Micor bi-level circuit needs to be optimized for 10 Meters. > > Does anyone know of any component value changes in the Micor bi-level circuit > to optimize operation on 10 Meters? > > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] MastrII Receiver Failure
Yea, I actually bought three when I was there soback to the site I go. THANKS AGAIN!! Adam N2ACF DCFluX wrote: > Buy a couple of spares and keep them in the manual at the site. > > On Sat, Jun 20, 2009 at 1:48 PM, Adam Feuer wrote: > >> Wow! Thanks for the tip. I changed out that FET and the sensitivity is >> back to normal. I went to Radio Shack and used an MPF-102. >> >> Now the question: Do I put it back at the site with the Radio Shack >> device? (I'm not sure who makes their transistors) Or do I order >> something better? >> >> Thanks again! >> >> Adam N2ACF >> >> >> DCFluX wrote: >> >>> Replace the FET that is in the helical casting. on the RF Pre-selector >>> board. It is a 2N4416, Radioshack carries the MPF-102 as a readily >>> available substitution. I'd use a J-310 if you have one. >>> >>> See: >>> http://www.repeater-builder.com/ge/lbi-library/lbi-4991g.pdf >>> >>> On Fri, Jun 19, 2009 at 11:27 AM, Adam Feuer wrote: >>> >>> >>>> Hello All >>>> >>>> I've had a MastrII low band receiver (29.540) on the air for close to 10 >>>> years now with no issues. It's been very sensitive and breaks squelch at >>>> around .17uv. >>>> >>>> Recently, after a lightening storm, the receiver went deaf. I went to >>>> the site thinking that the antenna might have got struck by lightening >>>> but it turns out that the receiver now breaks squelch and around 8uv. >>>> (or whatever is in between the 5 and 10uv setting on my IFR1200S) The >>>> antenna checks out fine. >>>> >>>> Having only tuned these receivers up and never having to trouble shoot a >>>> failure, I'm wondering if anyone knows of a "smoking gun" when it comes >>>> to a MastrII receiver failure like this. I'm going to dig out the book >>>> and see what I can find but any help or guidance would be greatly >>>> appreciated. >>>> >>>> Thanks in advance! >>>> >>>> Adam N2ACF >>>> >>>> >>>> >>>> >>>> >>>> >>>> Yahoo! Groups Links >>>> >>>> >>>> >>>> >>>> >>>> >>> >>> >>> >>> >>> Yahoo! Groups Links >>> >>> >>> >>> >>> >>> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] MastrII Receiver Failure
Wow! Thanks for the tip. I changed out that FET and the sensitivity is back to normal. I went to Radio Shack and used an MPF-102. Now the question: Do I put it back at the site with the Radio Shack device? (I'm not sure who makes their transistors) Or do I order something better? Thanks again! Adam N2ACF DCFluX wrote: > Replace the FET that is in the helical casting. on the RF Pre-selector > board. It is a 2N4416, Radioshack carries the MPF-102 as a readily > available substitution. I'd use a J-310 if you have one. > > See: > http://www.repeater-builder.com/ge/lbi-library/lbi-4991g.pdf > > On Fri, Jun 19, 2009 at 11:27 AM, Adam Feuer wrote: > >> Hello All >> >> I've had a MastrII low band receiver (29.540) on the air for close to 10 >> years now with no issues. It's been very sensitive and breaks squelch at >> around .17uv. >> >> Recently, after a lightening storm, the receiver went deaf. I went to >> the site thinking that the antenna might have got struck by lightening >> but it turns out that the receiver now breaks squelch and around 8uv. >> (or whatever is in between the 5 and 10uv setting on my IFR1200S) The >> antenna checks out fine. >> >> Having only tuned these receivers up and never having to trouble shoot a >> failure, I'm wondering if anyone knows of a "smoking gun" when it comes >> to a MastrII receiver failure like this. I'm going to dig out the book >> and see what I can find but any help or guidance would be greatly >> appreciated. >> >> Thanks in advance! >> >> Adam N2ACF >> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> > > > > > > > Yahoo! Groups Links > > > > >
[Repeater-Builder] MastrII Receiver Failure
Hello All I've had a MastrII low band receiver (29.540) on the air for close to 10 years now with no issues. It's been very sensitive and breaks squelch at around .17uv. Recently, after a lightening storm, the receiver went deaf. I went to the site thinking that the antenna might have got struck by lightening but it turns out that the receiver now breaks squelch and around 8uv. (or whatever is in between the 5 and 10uv setting on my IFR1200S) The antenna checks out fine. Having only tuned these receivers up and never having to trouble shoot a failure, I'm wondering if anyone knows of a "smoking gun" when it comes to a MastrII receiver failure like this. I'm going to dig out the book and see what I can find but any help or guidance would be greatly appreciated. Thanks in advance! Adam N2ACF
Re: [Repeater-Builder] Noise on UHF
Yes, I'm getting it in Rockland County, NY on one of my UHF machines. I'm told that the noise I'm hearing, which I only hear every "blue moon", is some sort of military radar. Adam N2ACF Chuck Kelsey wrote: > Is anyone hearing a strange noise (buzz/whine) on UHF? > > Chuck > WB2EDV > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Glenayre UHF PA
Ok, I don't use that model myself. I only have QT's in service. Adam Chuck Kelsey wrote: > It is the 97 series. > > Chuck > WB2EDV > > > > - Original Message - > From: "Adam Feuer" > To: > Sent: Sunday, June 14, 2009 7:05 PM > Subject: Re: [Repeater-Builder] Glenayre UHF PA > > > >> Chuck, >> >> Not being sure which model Glenayre PA you're referring to, I'm running >> several QT-7795 and QT-6775's on 442 thru 449 with no degradation. Do >> you have a "QT" series or the 97 series? >> >> Adam N2ACF >> >> >> Chuck Kelsey wrote: >> >>> Anyone know if a UHF Glenayre PA will work in the ham portion of the >>> band? >>> >>> Chuck >>> WB2EDV >>> >>> >>> >>> >>> >>> >>> Yahoo! Groups Links >>> >>> >>> >>> >>> >>> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> > > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Glenayre UHF PA
Chuck, Not being sure which model Glenayre PA you're referring to, I'm running several QT-7795 and QT-6775's on 442 thru 449 with no degradation. Do you have a "QT" series or the 97 series? Adam N2ACF Chuck Kelsey wrote: > Anyone know if a UHF Glenayre PA will work in the ham portion of the band? > > Chuck > WB2EDV > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] MSF Squelch EEpot
Hi Mark, Good to know and thanks! I haven't been back to the repeater yet but when I get there, I'll make some small adjustments. Thanks again! Adam N2ACF N9WYS wrote: > Adam... > > My experience with a C85GFB is that my squelch also seems a bit "tight", but > so far I have not been able to do anything about it. I set it to threshold > when I had the service monitor on it, and the station was within > specifications. > > FWIW - I currently have the station set for "AND" squelch, but have been > told that PL-only squelch may be a bit more "forgiving". I just haven't had > an opportunity to get to the tower and change the setting to see for myself > whether this is true. > > Mark - N9WYS > > -Original Message- > From: Repeater-Builder@yahoogroups.com On Behalf Of Adam Feuer > > Great, thanks James! > > Adam N2ACF > > James Delancy wrote: > >> Receiver Squelch is just that ... a level at which the local receiver >> un-squelches. The repeater squelch is the level the station uses to >> determine (for its own internal controller) when it is actually going to >> pass a signal through for repeat. I would recommend that you just set >> both at the same level. The squelch knob on the front of the SSCB may >> also affect your squelch levels depending on where you are deriving your >> COR signaling. >> >> James >> >> >> Adam Feuer wrote: >> >> >>> After interfacing my C74CXB to an external controller, everything seems >>> to be playing real nice. In scrutinizing received signals, it seems as >>> if the the MSF squelch is a little tight and not letting week signals >>> become week but rather just squelching them out. >>> >>> The receiver is programmed for CTCSS decode so I would like to loosen >>> the squelch a little. In the list of available EEpots, there are two >>> settings that I'm not totally familiar with: "Repeater Squelch" and >>> "Receiver Squelch". If someone could provide me an explanation of both >>> as well as which one I should lower to help my issue, it would be >>> greatly appreciated. >>> >>> Thanks! >>> >>> Adam N2ACF >>> > > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] MSF Squelch EEpot
Great, thanks James! Adam N2ACF James Delancy wrote: > Receiver Squelch is just that ... a level at which the local receiver > un-squelches. The repeater squelch is the level the station uses to > determine (for its own internal controller) when it is actually going to > pass a signal through for repeat. I would recommend that you just set > both at the same level. The squelch knob on the front of the SSCB may > also affect your squelch levels depending on where you are deriving your > COR signaling. > > James > > > Adam Feuer wrote: > >> After interfacing my C74CXB to an external controller, everything seems >> to be playing real nice. In scrutinizing received signals, it seems as >> if the the MSF squelch is a little tight and not letting week signals >> become week but rather just squelching them out. >> >> The receiver is programmed for CTCSS decode so I would like to loosen >> the squelch a little. In the list of available EEpots, there are two >> settings that I'm not totally familiar with: "Repeater Squelch" and >> "Receiver Squelch". If someone could provide me an explanation of both >> as well as which one I should lower to help my issue, it would be >> greatly appreciated. >> >> Thanks! >> >> Adam N2ACF >> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> > > > > > > > Yahoo! Groups Links > > > > >
[Repeater-Builder] MSF Squelch EEpot
After interfacing my C74CXB to an external controller, everything seems to be playing real nice. In scrutinizing received signals, it seems as if the the MSF squelch is a little tight and not letting week signals become week but rather just squelching them out. The receiver is programmed for CTCSS decode so I would like to loosen the squelch a little. In the list of available EEpots, there are two settings that I'm not totally familiar with: "Repeater Squelch" and "Receiver Squelch". If someone could provide me an explanation of both as well as which one I should lower to help my issue, it would be greatly appreciated. Thanks! Adam N2ACF
Re: [Repeater-Builder] Re:Dayton
Maybe one of the members of DARA reads this list... Years ago, when the club farmed out the running of the Hamvention to a real business that new what to do, it was nice to have your vendor packet in the mail by January, so that you could make your plans way in advance and have all of your ducks in a row - the flea market was well- organized and the help was there (and also the policing!) Since the club has taken over the duties, they have been very lax as to actual hamfest service, as I truly believe that THEY think we all will show up anyway, no matter WHAT level of service they give. I haven't been there as a vendor since then, and I don't think I'll go back as a vendor until they change their attitude... (...READ - Don't hold your breath...) At 11:44 PM 5/17/09 -0400, you wrote: >That said, this year was MUCH better than last year. >Still, I hope there are many more improvements next year. > >Hint: Start planning it NOW and start putting >anything needed for then together NOW. > >Joe M. > >Paul Dumdie wrote: >> >> The folks that run the flea market spaces need to work harder on getting things sent out in a timely manor. > > >---- > > > >Yahoo! Groups Links > > > > - Adam -
Re: [Repeater-Builder] First UHF MSF5000 Attempt
Hi Mark, Interesting about your MSR2000. I'm not sure about it's band splits but if I'm not mistaken, my MSF is "in band" all the way down to 438mhz. I'm suspicious about my tuning of that 4 pole filter because of my lack of knowledge on the use of a tracking generator. Although, when I was done tuning it, my scope looked very similar to the pics on the MSF page here on Repeater-Builder. I tried tuning it three times and every time I'm done, I only get 70 to 72 watts at the side of the cabinet. OH wellthanks anyway! Adam N2ACF Mark wrote: > Adam, > > It may be far enough out-of-band for the harmonic filter that it isn't > passing as much RF to the antenna connection port, regardless of what the > specs call for... I had an MSR2000 that was like that - it was in the > commercial UHF band and worked fine, but when it got moved to 444.5500, it > kept burning up the PA - melted the connections to the harmonic filter, even > with silver solder. (We finally gave up on that one.) > > Mark - N9WYS > > -Original Message- > From: Repeater-Builder@yahoogroups.com On Behalf Of Adam Feuer > Sent: Friday, May 08, 2009 2:49 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] First UHF MSF5000 Attempt > > Hmm??? The book at my friends shop said (if I read it right) that a C74 > with the filter option was rated at 110 from the PA and 85 at the > junction box which is why I'm concerned about my 71 watts. > > > James Delancy wrote: > >> UHF models that are 110 Watts, are rated for that out the side of the >> cabinet. This usually results in 160 Watts out of the PA. Then you >> are down around 100-110 Watts after the harmonic filter and the >> pre/post pass filters. >> >> James >> >> >> Maire-Radios wrote: >> >>> *well if it was 85 watts with 122.5 watts* >>> *it would be lower at 110 watts and any be the 71 watts do the >>> math should be about the same values.* >>> ** >>> *John* >>> ** >>> >>> >>> - Original Message - >>> *From:* n2acf <mailto:feu...@optonline.net> >>> *To:* Repeater-Builder@yahoogroups.com >>> <mailto:Repeater-Builder@yahoogroups.com> >>> *Sent:* Friday, May 08, 2009 2:49 PM >>> *Subject:* [Repeater-Builder] First UHF MSF5000 Attempt >>> >>> Hello All, >>> >>> Attempted to tune up the TX side of a C74CXB today. The odds >>> weren't really in my favor as I've never worked on a UHF MSF nor >>> have I ever used a tracking generator. I brought the station to a >>> friends shop and I used an IFR1200S for the tuning. >>> >>> I checked the station before I began and on 453.900 there was >>> 82.5 watts at the antenna port and 122.5 coming out of the PA. >>> So, I reprogrammed the station, adjusted the VCO, and then began >>> to re-tune the 3 pole and 4 pole filter. I also changed the >>> output power of the PA to 110 watts because I believe that is >>> what the station is rated for. The new TX frequency is 441.950. >>> >>> When I was done with both filters, I checked the power at the >>> antenna port and it's only 71 watts. I believe it's supposed to >>> be 85. >>> >>> The PA looks very clean on the spectrum analyzer and the carrier >>> is right on frequency. Again, I'm not the best at reading the >>> scope while using the tracking generator but I did it the best I >>> could for the first time. Is my output power OK at 71 watts or is >>> something wrong? >>> >>> Thanks in advanced! >>> >>> Adam N2ACF >>> >>> >> >> > > > > > > > > Yahoo! Groups Links > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.325 / Virus Database: 270.12.21/2102 - Release Date: 05/08/09 > 11:43:00 > > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] First UHF MSF5000 Attempt
Hmm??? The book at my friends shop said (if I read it right) that a C74 with the filter option was rated at 110 from the PA and 85 at the junction box which is why I'm concerned about my 71 watts. James Delancy wrote: > > > UHF models that are 110 Watts, are rated for that out the side of the > cabinet. This usually results in 160 Watts out of the PA. Then you > are down around 100-110 Watts after the harmonic filter and the > pre/post pass filters. > > James > > > Maire-Radios wrote: >> *well if it was 85 watts with 122.5 watts* >> *it would be lower at 110 watts and any be the 71 watts do the >> math should be about the same values.* >> ** >> *John* >> ** >> >> >> - Original Message - >> *From:* n2acf <mailto:feu...@optonline.net> >> *To:* Repeater-Builder@yahoogroups.com >> <mailto:Repeater-Builder@yahoogroups.com> >> *Sent:* Friday, May 08, 2009 2:49 PM >> *Subject:* [Repeater-Builder] First UHF MSF5000 Attempt >> >> Hello All, >> >> Attempted to tune up the TX side of a C74CXB today. The odds >> weren't really in my favor as I've never worked on a UHF MSF nor >> have I ever used a tracking generator. I brought the station to a >> friends shop and I used an IFR1200S for the tuning. >> >> I checked the station before I began and on 453.900 there was >> 82.5 watts at the antenna port and 122.5 coming out of the PA. >> So, I reprogrammed the station, adjusted the VCO, and then began >> to re-tune the 3 pole and 4 pole filter. I also changed the >> output power of the PA to 110 watts because I believe that is >> what the station is rated for. The new TX frequency is 441.950. >> >> When I was done with both filters, I checked the power at the >> antenna port and it's only 71 watts. I believe it's supposed to >> be 85. >> >> The PA looks very clean on the spectrum analyzer and the carrier >> is right on frequency. Again, I'm not the best at reading the >> scope while using the tracking generator but I did it the best I >> could for the first time. Is my output power OK at 71 watts or is >> something wrong? >> >> Thanks in advanced! >> >> Adam N2ACF >> > > >
Re: [Repeater-Builder] First UHF MSF5000 Attempt
True, BUT the book says 110 and 85 (I think) at the antenna port. What I'm getting at is that it may NOT have been right (122.5) from the start. Maire-Radios wrote: > > > *well if it was 85 watts with 122.5 watts* > *it would be lower at 110 watts and any be the 71 watts do the > math should be about the same values.* > ** > *John* > ** > > > - Original Message - > *From:* n2acf <mailto:feu...@optonline.net> > *To:* Repeater-Builder@yahoogroups.com > <mailto:Repeater-Builder@yahoogroups.com> > *Sent:* Friday, May 08, 2009 2:49 PM > *Subject:* [Repeater-Builder] First UHF MSF5000 Attempt > > Hello All, > > Attempted to tune up the TX side of a C74CXB today. The odds > weren't really in my favor as I've never worked on a UHF MSF nor > have I ever used a tracking generator. I brought the station to a > friends shop and I used an IFR1200S for the tuning. > > I checked the station before I began and on 453.900 there was 82.5 > watts at the antenna port and 122.5 coming out of the PA. So, I > reprogrammed the station, adjusted the VCO, and then began to > re-tune the 3 pole and 4 pole filter. I also changed the output > power of the PA to 110 watts because I believe that is what the > station is rated for. The new TX frequency is 441.950. > > When I was done with both filters, I checked the power at the > antenna port and it's only 71 watts. I believe it's supposed to be > 85. > > The PA looks very clean on the spectrum analyzer and the carrier > is right on frequency. Again, I'm not the best at reading the > scope while using the tracking generator but I did it the best I > could for the first time. Is my output power OK at 71 watts or is > something wrong? > > Thanks in advanced! > > Adam N2ACF > > > > >
Re: [Repeater-Builder] Cushman 5110 wont lock
When I have this problem with my Cushman 31-A, I pull the boards from the main chassis and clean all of the gold contacts - this usually brings it back to life. You may still have an issue with a component somewhere, but it's worth a try... At 03:58 AM 4/29/09 -, you wrote: >I have a Cushman 5110 and spectrum analyzer wont lock. Any help/advice >appreciated. I really would like to fix this, but not much info >on the web. > >Lynn > > > > > > > > >Yahoo! Groups Links > > > > - Adam -
Re: [Repeater-Builder] Converting a TKR-750/850 for Amateur Usage
Thanks Ed!! Adam N2ACF Ed Yoho wrote: > Adam Feuer wrote: > >> Hi Ed, >> >> Thanks for the information. The 840 is very attractive to me because I >> see that it can be turned down to 250mw to drive my Quintron Amps when I >> can no longer find any MastrII exciters. What was programming them like >> "out of band"? >> >> Adam N2ACF >> >> > > Adam, > > If you have access to KPG47D, the steps are: > 1. Make a simple one channel configuration on say 451.250 rx and 456.250 > tx with the appropriate PL and other settings. > 2. Save it. > 3. Open it with a hex editor and go down to address 0830. There you > will see the following: > FF FF 00 50 12 45 00 50 62 45 XX XX 00 00 FF FF >|| || || || || || || || > RX 78 56 34 12|78 56 34 12 TX > > RX 451.25000 > 12 45 > 34 12 > 56 50 > 78 00 > > TX 456.25000 > 12 45 > 34 62 > 56 50 > 78 00 > > 4. Replace the numbers with your frequencies and save it. > 5. Verify it shows your desired frequencies. > 6. Load file into KPG47D and program the 840. > > You can go back into the file to change settings other than frequency if > needed. If you touch the frequencies, it will force them back to 450.000. > > > Ed Yoho > W6YJ > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Converting a TKR-750/850 for Amateur Usage
Hi Ed, Thanks for the information. The 840 is very attractive to me because I see that it can be turned down to 250mw to drive my Quintron Amps when I can no longer find any MastrII exciters. What was programming them like "out of band"? Adam N2ACF Ed Yoho wrote: > Adam Feuer wrote: > >> Ken, >> >> How about the TKR-840? Any idea if that one will go down via the >> software and tune without issues as well? >> >> Adam N2ACF >> > > Adam, > > I and others are using the TKR-840s here in so-cal. The only down side > is the helicals are not narrow as you would normally find in an older > GE/Ericsson or Motorola receiver. I don't remember exactly how wide, but > IIRC they are about a 15 MHz wide quasi window filter. > Here in so-cal we receive low (440-445). Depending on where in the band > you need to receive, the helicals may or may not make it that far. They > are easily bypassed (part of the unit's design). > > Ed Yoho > W6YJ > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Converting a TKR-750/850 for Amateur Usage
Ken, How about the TKR-840? Any idea if that one will go down via the software and tune without issues as well? Adam N2ACF Ken Arck wrote: > At 01:40 PM 4/16/2009, ptt_pupil wrote: > > > >> Can anyone tell me how you can convert a TKR-750/850 U.S. model to >> be used for amateur radio frequency? I see that people have. There >> is a European model that includes amatuer bands, but can't get it >> here in the U.S. Thanks! >> > > <---No conversion necessary. They tune down no problems at all. > > Ken > -- > President and CTO - Arcom Communications > Makers of repeater controllers and accessories. > http://www.arcomcontrollers.com/ > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > "We don't just make 'em. We use 'em!" > > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Re: MSF5000 Squelch
Bob, Good to know and thanks for the test! Adam N2ACF n...@no6b.com wrote: > A > A friend of mine has a stock MSF5000 repeater on the air well within HT > range, so I tried sending some strong & weak signals to it. Sure enough, > it's noise squelch acts a lot like the Micor, but it's not as good > IMO. The MSF5000's short squelch sounds like it's 10 to 20 milliseconds, > not as quiet as the Micor's 2 to 4 milliseconds. > > Bob NO6B > > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Re: MSF5000 Squelch
Thanks to all for the replies. I'm glad they tried to at least mimic the Micor. Thanks again! Adam N2ACF Bob M. wrote: > I sit corrected. Sorry if my info misled anyone. > > They tried to mimic the Micor squelch without the Micor chip. I've never had > one work that way, possibly because I'm not using the internal repeater > configuration. > > Bob M. > == > --- On Thu, 3/19/09, nj902 wrote: > > >> From: nj902 >> Subject: [Repeater-Builder] Re: MSF5000 Squelch >> To: Repeater-Builder@yahoogroups.com >> Date: Thursday, March 19, 2009, 4:59 PM >> --- In Repeater-Builder@yahoogroups.com, >> "Bob M." wrote: >> >> "... The MSF5000 squelch is a single-level noise-based >> squelch system, much like the MaxTrac and most mobile >> radios. The squelch-tail duration is fixed. ..." >> >> . >> >> Incorrect. >> >> Since the original post referred to a CXB station, the >> operation of the squelch circuitry in the SSCB is as >> follows: >> >> The receiver squelch switching circuit operates in two >> modes. With a weak signal just above the opening >> sensitivity, squelch closing is slow (approximately 150 ms.) >> which results in the long squelch tail heard at the end of a >> received message. The long squelch tail is present to >> prevent the received message from being chopped during a >> weak fluttering signal. >> >> With a strong signal (approximately 10 dB above opening >> sensitivity), a squelch closing occurs immediately after the >> end of a received signal. This prevents the squelch >> tail from being heard. >> ... >> The repeater squelch detector circuit is very similar to >> the receiver squelch detector. (repeater slow squelch >> closing time is approximately 200 ms.) >> > > > > > > > > > > Yahoo! Groups Links > > > > > >
Re: [Repeater-Builder] MSF5000 Squelch
Great info and just what I needed. Thanks again Bob! Adam N2ACF Bob M. wrote: > You've got several more hours (or even days) of reading ahead of you! Thanks > for the comments. > > The MSF5000 squelch is a single-level noise-based squelch system, much like > the MaxTrac and most mobile radios. The squelch-tail duration is fixed. > However there are two distinct and electronically different squelch circuits > in the station: one for the Repeater, one for the Receiver, and they are > independently set via EEPots. To confuse matters, the Receiver squelch can be > set from the front panel Squelch pot instead of the EEPot IF the Acc Dis > switch is raised. > > The only official way to tell if the squelches are closed is with a digital > metering panel, as it has LEDs on both squelch signals. You can also measure > the squelch circuit outputs with a DC voltmeter. > > The station's CW ID will NOT fire if either squelch circuit fails to close. > Whichever way you're not using the station (repeater or receiver), then set > its squelch EEPot to 99 or some high setting to insure they both eventually > close. > > Bob M. > == > --- On Thu, 3/19/09, Adam Feuer wrote: > > >> From: Adam Feuer >> Subject: [Repeater-Builder] MSF5000 Squelch >> To: Repeater-Builder@yahoogroups.com >> Date: Thursday, March 19, 2009, 1:16 PM >> Hello All, >> >> I've just come into owning my first MSF5000 UHF Repeater >> model C74CXB. >> Also, I've spent the last few hours reading Bob's (WA1MIK) >> "MSF/PURC >> Station Page" as well as the "Photo Tour" page on Repeater >> Builder. By >> the way Bob, very well done and informative! Thanks!! >> >> I'm not sure if I missed it but I'm curious about the MSF's >> squelch. In >> particular, how it compares to the Micor Bi-Level Squelch. >> I have no >> experience yet with the MSF and I'm just wondering how it's >> squelch >> would do in general and as compared to that of the Micor. >> >> Thanks in advance! >> >> Adam N2ACF >> > > > > > > > > > > Yahoo! Groups Links > > > > > >
[Repeater-Builder] MSF5000 Squelch
Hello All, I've just come into owning my first MSF5000 UHF Repeater model C74CXB. Also, I've spent the last few hours reading Bob's (WA1MIK) "MSF/PURC Station Page" as well as the "Photo Tour" page on Repeater Builder. By the way Bob, very well done and informative! Thanks!! I'm not sure if I missed it but I'm curious about the MSF's squelch. In particular, how it compares to the Micor Bi-Level Squelch. I have no experience yet with the MSF and I'm just wondering how it's squelch would do in general and as compared to that of the Micor. Thanks in advance! Adam N2ACF
[Repeater-Builder] S-COM 7K Wanted
Looking to purchase a working 7K with version 2.03 firmware. If you're looking to part with one, please email me direct. Thanks! Adam N2ACF feu...@optonline.net
Re: [Repeater-Builder] Re: 220 Repeater Power Amp
I wouldn't waste any time or money on Henry or TE Systems repeater amplifiers. On my 220 repeater, I had the Henry and it was the biggest POS I had ever seen. The workmanship with regard to the soldering of components was terrible. I've used one on my 440 machine and it was worse! I have been using the TPL that I received from Jeff without any issues, keyed down for hours. Just looking at the PA board in the TPL versus the Henry is enough to tell you why the Henrys fail. Spend the extra money once, it will be well worth it. Adam N2ACF Jeff DePolo wrote: > I second Skipp's motion, having been burned by Henry twice before, UHF amps > delivered without a low pass filter, second harmonic about -40 dBc in the > cell band... > > Also, TPL manufactures 220 amps (I had one, Adam N2ACF has it now), > primarily for overseas markets. They use the same devices as in their UHF > amps (MRF646's and MRF648's primarily). You'll probably have to call to > find out availability in the US. > > --- Jeff > > >> Make sure you ask (at the time of the order) if the Amateur >> Band Amplifier you're buying includes the same type low pass >> filter supplied with the commercial RF deck. There's a historical >> reason why I make this comment... >> s. >> >> >>> "repeat...@..." wrote: >>> Henry Radio also makes 220 amplifiers. 1-800-877-7979 also >>> give amateur discounts. >>> Paul AA3VI >>> >> >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 8.0.237 / Virus Database: 270.11.3/1970 - Release >> Date: 03/15/09 14:07:00 >> >> >> >> > > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Which Motorola Mobiles Do 29 MHz?
I use a 30-36 Maxtrac to access my 10 meter repeater. Works great, just program and play. Adam N2ACF > /--Original Message---/ > > /*From:*/ ran...@farmtel.net <mailto:ran...@farmtel.net> > /*Date:*/ 3/3/2009 9:53:34 PM > /*To:*/ Repeater-Builder@yahoogroups.com > <mailto:Repeater-Builder@yahoogroups.com> > /*Subject:*/ [Repeater-Builder] Which Motorola Mobiles Do 29 MHz? > > > I'm familiar with which radios will do 444 MHz and 146 MHz. But what > about 29 MHz? > > Low split Maxtrac? M208? CDM1250? > > Only interested in programmable multi-channel models. > > Randy > > > > > > > http://www.incredimail.com/index.asp?id=109094&rui=109077739 > <http://www.incredimail.com/index.asp?id=109094&rui=109077739> > > > > *A Good Credit Score is 700 or Above. See yours in just 2 easy steps! > <http://pr.atwola.com/promoclk/100126575x1219957551x1201325337/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DfebemailfooterNO62>*
Re: [Repeater-Builder] PL Reeds Needed
Eric, If you don't get any replies on the 6209's for 141.3, is there anyway that you could use TLN8381A's? I ask because I have three of them that I could send you for a total cost of nothing! Adam N2ACF Eric Lemmon wrote: > I need at least two KLN6209A Vibrasponder reeds for 141.3 Hz, and at least > two KLN6210A Vibrasender reeds for 82.5 Hz. I have other frequencies to > trade, one for one. These reeds are needed for a critical link radio > system, and part number substitutions are not acceptable. Please respond > directly to wb6fly at verizon dot net. Thanks! > > 73, Eric Lemmon WB6FLY > > > > > > > Yahoo! Groups Links > > > > > >
Re: [Repeater-Builder] Re: Vertex FTL-1011H CE7 Software Q's
I replied to Dave direct, but I'd like to place two cents here, too... The older version of the 4/12/24 channel software goes out-of band, the newer versions don't. The newer version of the 99-channel software goes out-of-band, the older doesn't. They seem to favor going up into 6m, but not below 29.7 (I spent a half hour trying most of the different versions I have here) so - someone would have to do some hacking to find the bits to change to get 10m into one of these 1011's. Do you guys buy lunch for 8-Landers?.. At 04:41 PM 12/27/08 -, you wrote: > >Dave, > >There are/were two versions of the software. I seem to remember the >early version programs out of band. The newer version is/was not so >flexible. > >I'll Email you a copy of the software I have. > >skipp > >ps: We miss your face at the wed lunch > > >> "na6df" wrote: >> >> Anybody have a clue as to how to hack the CE7 software for the >> FTL-1011H 99 channel radio? I have a low split low band model that I >> would like to use on 10 meters. The low frequency limit is set to >> 29.7mhz right now. I have been through the software with a hex editor, >> but can't seem to locate that parameter. Any help appreciated, thanks! >> >> Dave NA6DF >> > > > > > > > >Yahoo! Groups Links > > > > - Adam -
Re: [Repeater-Builder] Re: Astron P/S question
have two Astrons here on the bench. One is a VS12, the otheris a >RS12. When the output is directly shorted with heavy wire theyboth >simply fold back. Shorted them dozens of times; never a blown >fuse.Laryn > K8TVZYahoo! >Groups Links<*> To visit your group on the web, go >to: >http://groups.yahoo.com/group/Repeater-Builder/<*> Your email >settings: Individual Email | Traditional<*> >To change settings online go to: >http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! >ID required)<*> To change settings via email: >mailto:repeater-builder-dig...@yahoogroups.com >mailto:repeater-builder-fullfeatu...@yahoogroups.com<*> To >unsubscribe from this group, send an email to: >repeater-builder-unsubscr...@yahoogroups.com<*> Your use of >Yahoo! Groups is subject to: > http://docs.yahoo.com/info/terms/ >style="FONT: 10pt ARIAL, SAN-SERIF; COLOR: black"> > > Don't be the last to know - href="http://www.aol.com/?ncid=emlcntaolcom0021";>click here for the > latest news that will have people talking. style="COLOR: white" width="1"> > > > - Adam -
Re: [Repeater-Builder] Re: Astron P/S question
I have had a 35-amp Astron on my workbench for years, and I can short the red and black together quickly (which happens when you aren't fussy about how many projects you have going at one time) and the supply will shut down and NOT blow the fuse - This is an adjustable supply with both voltage and current controls - I haven't tried it lately with the current control at full, but I assume it would be the same. I also haven't kept the leads together for a long time, lately, but I do remember trying it years ago just to see if it would hold down - and it did. Making the SCR fire is a black magic that shouldn't be misconstrued or misunderstood this close to the winter solstice... Merry Christmas, everyone. At 02:44 PM 12/24/08 -0500, you wrote: >I have an old Bullet power supply built from a kit (anyone remember those?) >that uses the 723. You can short the output time and time again and it >simply folds back. No harm, no foul. That's why I was wondering. I've never >tried that with an Astron (and probably won't now). > >Chuck >WB2EDV > > >- Original Message - >From: "Bob M." >To: >Sent: Wednesday, December 24, 2008 2:32 PM >Subject: Re: [Repeater-Builder] Re: Astron P/S question > > >>I think they do, but only if the supply is putting out current to the load >>and the current exceeds the value they've set for it. The crowbar firing >>definitely exceeds the current limit but it's so sudden and complete that >>the design and component values just cause the fuse to instantaneously >>blow. >> >> Bob M. >> > > > > > > >Yahoo! Groups Links > > > > - Adam -
Re: [Repeater-Builder] Micor Squelch mod
Gerald, Thank you SO much! I really appreciate it! Adam N2ACF Gerald Pelnar wrote: > the schematic I have shows R237 used in IMTS stations only. 22K goes from > pin 13 to ground. > > Gerald Pelnar WD0FYF > McPherson, Ks > > - Original Message - > From: "Adam C. Feuer" <[EMAIL PROTECTED]> > To: > Sent: Monday, November 24, 2008 8:58 AM > Subject: [Repeater-Builder] Micor Squelch mod > > > >> Hello All, >> >> Does anyone happen to have a Micor IMTS Station manual? If so, I'm >> looking for how they locked an M6709 into long squelch mode only. I >> think that it just may be a resistor (not sure what value) to go between >> two pins of the chip or from one particular pin to ground. >> >> Any help would be greatly appreciated and thanks! >> >> Adam N2ACF >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> > > > > > > > Yahoo! Groups Links > > > > >
[Repeater-Builder] Micor Squelch mod
Hello All, Does anyone happen to have a Micor IMTS Station manual? If so, I'm looking for how they locked an M6709 into long squelch mode only. I think that it just may be a resistor (not sure what value) to go between two pins of the chip or from one particular pin to ground. Any help would be greatly appreciated and thanks! Adam N2ACF
Re: [Repeater-Builder] S-COM Industries 5K REPEATER CONTROLLER FOR SALE
Hi Lee, Do you happen to know which version of firmware it has? Thanks! Adam N2ACF Lee Pennington wrote: > S-COM Industries 5K REPEATER CONTROLLER complete with optional 19" > Rack Mount, uses only 1 3/4 inch vertical space and only 7 inches deep. > > Comes with comprehensive programming and installation instructions, > schematics. etc. > > Pulled from retired repeater, guaranteed not DOA > > $135.00 shipped & insured. > > No Paypal, USPS money orders preferred, personal checks OK, or good > ol'cash always welcomed. > > Lee, K4LJP > > >
Re: [Repeater-Builder] HTX-202 RUBBER DUCK WANTED.
There are plenty of other antennae that would fit the bill. Just look for a quarterwave antenna. Adam Kb2jpd On Sat, Nov 1, 2008 at 2:27 PM, n8rtn <[EMAIL PROTECTED]> wrote: > Hi,iam looking for a Original htx-202 rubber duck ant any one have one? > thanksN8RTN..Mike > > >
Re: [Repeater-Builder] MastrII PA Rack Mount
Jeff and Chuck, Thanks for the replies. Not being familiar with the aluminum stock method, I'll give that some more thought. I'll see what Home Depot has to offer. I think I might have a blank rack panel to cut so I'll give that a shot too. Chuck, I'd be interested to see the your pics but I didn't get them. Did you send them to [EMAIL PROTECTED] Thanks again guys! Adam N2ACF Chuck Kelsey wrote: > I did it with aluminum flat stock and some hex threaded spacers. I sent > pictures direct to him. > > Chuck > WB2EDV > > > - Original Message - > From: "Jeff DePolo" <[EMAIL PROTECTED]> > To: > Sent: Monday, October 27, 2008 3:49 PM > Subject: RE: [Repeater-Builder] MastrII PA Rack Mount > > > >> I don't have an M2 PA in front of me to look at, but I would guess it's >> maybe 17" inches across instead of 19"? How about just getting two pieces >> of 2" flat aluminum stock, each cut to the height of the PA, drill holes >> for >> rack mounting, and holes to line up with the existing mounting holes on >> the >> PA heatsink and bolt it on? The Depot and other hardware stores sells >> aluminum stock (flat, angle, tubing, etc.), not sure how wide they have >> though. >> >> >> > > > > > > > Yahoo! Groups Links > > > > >
[Repeater-Builder] MastrII PA Rack Mount
Hello all, I have the need to mount a MastrII PA in a standard 19 inch two post rack as opposed to it being mounted on the back of the repeater. I believe I'll need a set of "ears" or "tabs" that will mount to the PA and extend it so it mounts into the rack. If anyone has done this and has information, including pictures, it would be greatly appreciated. Thanks! Adam N2ACF
Re: [Repeater-Builder] Midland UHF PA
Dennis, Much appreciated and thanks!! Adam N2ACF Dennis Bridgeman wrote: > Adam, > The Midland 71-5400 base/repeater amps needs 5w of drive. > > Dennis Bridgeman KCØFWN > Bridgeman Communications > 202 Seventh Street > Carmi, IL 62821 > http://bridgemancommunications.com > > > > - Original Message - > *From:* Adam C. Feuer <mailto:[EMAIL PROTECTED]> > *To:* repeater-builder@yahoogroups.com > <mailto:repeater-builder@yahoogroups.com> > *Sent:* Monday, October 13, 2008 4:37 PM > *Subject:* [Repeater-Builder] Midland UHF PA > > Hello All, > > I have come into a few Midland UHF power amplifiers. On the PA's, > it's > labeled as a model number 71-5400B, 120 watts out, and freq range of > 450-470. Does anyone know the drive requirements for this PA? I've > looked through the RB web site as well as Midlands web site and have > found nothing. > > When I Google the amp the only info that comes up is a few Ebay > auctions. > > Any help would be greatly appreciated. > > Thanks!! > > Adam N2ACF > >
[Repeater-Builder] Midland UHF PA
Hello All, I have come into a few Midland UHF power amplifiers. On the PA's, it's labeled as a model number 71-5400B, 120 watts out, and freq range of 450-470. Does anyone know the drive requirements for this PA? I've looked through the RB web site as well as Midlands web site and have found nothing. When I Google the amp the only info that comes up is a few Ebay auctions. Any help would be greatly appreciated. Thanks!! Adam N2ACF
RE: [Repeater-Builder] LMR Crimping Tools
Looks just like what I was looking for but I don't know of anyone else needing one. If I don't receive any other replies of something better / different, I'll probably order one. Thanks! Adam N2ACF At 14:55 8/31/2008, you wrote: >Looks like the price goes down for 10 or more. I wonder if they >would ship to more than one address at that price? I'd buy one if >Adam, perhaps you can find some others to join in. - Mike > >From: Repeater-Builder@yahoogroups.com >[mailto:[EMAIL PROTECTED] On Behalf Of Yahoo >Sent: Sunday, August 31, 2008 2:23 PM >To: Repeater-Builder@yahoogroups.com >Subject: RE: [Repeater-Builder] LMR Crimping Tools > > ><http://www.hyperlinktech.com/item.aspx?id=878>http://www.hyperlinktech.com/item.aspx?id=878 > >Jeff > >-Original Message- >From: ><mailto:Repeater-Builder%40yahoogroups.com>Repeater-Builder@yahoogroups.com >[mailto:[EMAIL PROTECTED] On Behalf Of Adam C. Feuer >Sent: Sunday, August 31, 2008 7:23 AM >To: ><mailto:repeater-builder%40yahoogroups.com>repeater-builder@yahoogroups.com >Subject: [Repeater-Builder] LMR Crimping Tools > >Hello All, > >I'm in the market for a ratchet crimp tool for LMR400, LMR240, RG213, and >RG58. I believe I'll either need two tools or one handle with replaceable >dies. > >Anyone have a specific brand or model that they're happy with? If so, where >did you get it? > >Thanks! > >Adam N2ACF > > > >Yahoo! Groups Links > > >__ NOD32 3401 (20080829) Information __ > >This message was checked by NOD32 antivirus system. ><http://www.eset.com>http://www.eset.com >
[Repeater-Builder] LMR Crimping Tools
Hello All, I'm in the market for a ratchet crimp tool for LMR400, LMR240, RG213, and RG58. I believe I'll either need two tools or one handle with replaceable dies. Anyone have a specific brand or model that they're happy with? If so, where did you get it? Thanks! Adam N2ACF
Re: [Repeater-Builder] Looking for manual for Moto B91RCB station
Bob, I'm at my office until 4pm but I do have that manual at my house. I'm running two of those stations, one on 10 meters and one on 6 meters. I'll either email you tonight what I find or contact you on your repeater if I find a high spot in town. Adam N2ACF At 10:14 AM 6/25/2008, you wrote: >330w low-band station in the tall cabinet: B91RCB6405A. > >Looking for the proper manual number(s) for this station, then I'll >probably be looking for the actual manuals themselves. > >I am presuming that one manual would cover the RF portions and >another would cover the control section. Both would be useful for >repair, tuning, and interfacing. I have a two-manual set for a 75w >UHF Micor station. > >This is for a friend in northern CT. Let me know what to ask for, >then whom, and I'll pass it along. > >Thanks. > >Bob M. > > > > > > > > >Yahoo! Groups Links > > >
Re: [Repeater-Builder] WX-200 with CAT-1000
Mike, I'm doing just what you want but not with a CAT1000 but rather an SCOM 7K. I have the audio from the WX200 being fed into one of the three ports on the 7K and have made that port the lowest priority. This way, we receive all of the weather reports from the WX200 but if someone has an important transmission, they can talk right over it and the controller "priority by port" does the rest. It works perfect. Last night in my area of New York, we must have received a dozen watches and warnings for severe lightening. Everything worked flawlessly just like you desire on your system. Does the CAT1000 let you prioritize ports? Adam N2ACF At 20:59 6/16/2008, you wrote: >My club is considering the purchase of a WX200 to go with our >repeater/CAT-1000. One of the questions posed was whether a >repeater user can talk over the WX transmission. I'm thinking that >the controller can be configured that way, but since I'm on-the-road >I don't have access to my books. Can anyone provide me an answer so >I can get back to the executive committee quickly? > >Thanks, > >Mike > >WM4B >
Re: [Repeater-Builder] Re: Best coax for short jumpers in repeater cabinet?
At 04:50 PM 5/11/08 -, you wrote: Are you sure you don't mean 'RG-223' there, Skipper-doo? I use a lot of this on my bench and home equipment, for the same reasons the Skipp points out - it's cheap and effective. It's the same size (approximately) as RG-58, and uses mostly the same connectors (occasionally I'll get a crimp connector collar that's a little snug...) >One doesn't have to go high dollar overkill spec all the time. >I'm also a fairly big fan of RG-233 Coax for many repeater >system/equipment applications. RG-233 seems to be the ignored >step child of the coax family, which means it's not instant shark >bait every time it pops up on Ebay and the surplus radio world >market. > >I found a fairly decent price on some pre-made RG-233 Coax runs >on Ebay: > >Cable Assembly RF Coax 7 ft RG-223/U N-Fe to SMA Male >Ebay Item number: 190175957842 > >My offer to the seller for 2/3 the asking amount was accepted and >I now have a fair number of those lines in my collection at a >much better than the $3.10 (Tessco) list price per foot. > >Not a bad deal if you want to take the plunge... > >cheers, >skipp >skipp025 at yahoo.com >www.radiowrench.com > > > >"See you at Dayton! I'm the short chubby guy with red hair." > > >> [EMAIL PROTECTED] wrote: >> Hi Brent, >> I agree with Skipp, the LMR is not the cable i would recommend >> in a duplex repeater install. If you want jumper coax, I only >> use RG400 and it is a plenum rated silver plated with double >> shield braid silver. Both Motorola and Kenwood systems use >> this coax for there internal cableing inside the cabinet. I >> yet have seen them use LMR coax. Spend the little extra for >> good coax and you will find yourself much happier and not >> searching for weird site problems. For the main feed line, you >> can't get any better then Andrew's LDF coax for repeater installs. > > > > > > > >Yahoo! Groups Links > > > > - Adam -
Re: [Repeater-Builder] SpectraTac Housing - SMA Connector?
Hi Bob, Thanks for the reply. I too didn't think that there was anything special about the cable or connector. I was just looking to see if anyone knew of a supplier and part number for the SMA crimp on for RG400. ( I guess I should have typed it that way to begin with!) Thanks again! Adam N2ACF At 15:06 4/24/2008, you wrote: >I don't think there's anything special about the >connector or cable. You can just buy a regular >straight SMA male (crimp or solder) for RG400, use a >short piece of RG400, and attach it to the existing >N-female chassis socket. Or make/buy a short SMA to >N-male cable and install a bulkhead thru-connector, >N-female to N-female, in the chassis. There should be >room for that much. > >There are plenty of places on the web that will make >any custom cable you want. You tell them what >connectors you want at each end, the type of coax, and >the length, pay about $30, and you get a very nicely >made cable. > >The cable in my 900 MHz chassis is maybe 8-10 inches >long and is arranged in the shape of a "2" with a tall >tail at the top that is soldered to the N-female >connector. > >There is an official part number for the entire cable >assembly in the manual, but I doubt Motorola would >have it any more, or if you'd want to pay them for it. > >I can send a photo of mine, if that would help. > >Bob M. >== >--- "Adam C. Feuer" <[EMAIL PROTECTED]> wrote: > > > Hello All, > > > > I'm going to be removing a low band receiver board > > from a Spectratac > > housing and replacing it with a 900mhz receiver. > > > > Does anyone know the manufacturer and part number of > > an SMA connector > > that can be purchased and crimped on to the coax > > jumper in the > > housing? If I cut off the RCA connector there > > appears to be enough > > cable to crimp on an SMA in it's place. > > > > Thanks! > > > > Adam N2ACF > > > > >Be a better friend, newshound, and >know-it-all with Yahoo! Mobile. Try it >now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ > > > > > >Yahoo! Groups Links > > >
[Repeater-Builder] SpectraTac Housing - SMA Connector?
Hello All, I'm going to be removing a low band receiver board from a Spectratac housing and replacing it with a 900mhz receiver. Does anyone know the manufacturer and part number of an SMA connector that can be purchased and crimped on to the coax jumper in the housing? If I cut off the RCA connector there appears to be enough cable to crimp on an SMA in it's place. Thanks! Adam N2ACF
Re: [Repeater-Builder] Motorola Channel Elements
If I'm not mistaken, I believe you can them in the MSR2000 as well. Adam N2ACF At 20:43 3/22/2008, you wrote: >Were Motorola KXN1086 and KXN1088 channel elements >used in any other product line besides the Mitrek? > >Eric, KH6CQ > > > > > >Never miss a thing. Make Yahoo your home page. >http://www.yahoo.com/r/hs > > > > > >Yahoo! Groups Links > > >
[Repeater-Builder] Replacement 10mhz oscillator
Hello All, Is anyone aware of a supplier that carries a "drop in replacement" 10mhz oven oscillator for the Glenayre / Quintron universal exciter? I Thanks in advance... Adam N2ACF
[Repeater-Builder] MSR2000 Channel Elements
Hello All, I just came off the RB web site and either missed what I was looking for or just didn't find it. It is written very clear with regard to the transmit elements that you can't swap crystals from the KXN1088 to the KXN1095. Does this hold true on the receive elements, KXN1086B and KXN1112A? I have a crystal that was ordered for a KXN1086B but just came across a KXN1112A element. Thanks in advance! Adam N2ACF
[Repeater-Builder] Hamtronics TB901 Exciter
Hello All, I'm looking for input on the Hamtronics TB901 900mhz exciter. I have two 900mhz repeaters that are responsible for the linking of 14 other UHF machines together. I would like to have an "on the shelf" backup exciter. The exciters that I presently use are Quintron / Glenayre Universal exciters (200mw) and I haven't been successful in finding anymore. I have access to a TB901 and would like to order some crystals from Bomar. (not interested in the crystal company debate, that's just who I use) Does anyone have the particulars for ordering replacement crystals for these exciters? Also, does anyone have experience with adding PL to the TB901? I believe I read on RB that some mods were needed on the 2 meter, 220, and UHF versions. Thanks in advanced... Adam N2ACF
RE: [Repeater-Builder] GE MastrII Auxiliary Receiver
Doug, I'm going to try to remove the 12v tonight. Sitting here at work reading this I'm not 100 percent in understanding what needs to be done. So, I'll look at this email again tonight when I'm on the bench. Thanks!! Adam N2ACF At 12:47 PM 12/12/2007, you wrote: >What you are describing is typical when the audio PA is loaded badly >or is self-oscillating, and drawing excessive current. You should be >able to bypass the 12v to the audio PA on the regulator board as it >only feeds the audio PA to the best of my recollection... It does >indicate a problem if 2 IFAS boards do it, but in the bigger picture >it is an unused circuit in a voter rx, so it may be easier to move >on... If the caps are weak on the 12v, it could just be allowing the >audio PA to be unstable as there is a feedback loop in the windings >of the audio PA transformer and if power is unstable it could become >an oscillation and be what you are seeing run off and blow the fuse > >The mod I described is on older IFAS boards and eventually became >incorporated into new boards, swapping the component in the feedback >winding of the transformer.. Off hand I think it was a cap to ground >which was changed to a resistor to ground... and it stopped >oscillation in the circuit... > >The LBI's are RB website, quick and dirty may be disable the 12v to >the audio finals and it should draw a lot less current. > >It also seems to me one of the audio pa transistors was tab ( >collector ) hot and maybe the hot tab mount insulators melted causing >the 12 to short to ground of the heatsink... if you have a direct >short, start there... but 2 IFAS boards doing same... is curious... > >ohming 12 v to ground on the IFAS side of the fuse would tell if you >have a direct short or a current run-away or similar... > >Doug >KD8B > > >At 09:45 PM 12/11/2007, you wrote: > > >Hi Eric, > > > >I went back to the site today and pulled the receiver chasis. I'm > >more of a "SpectraTac" person myself so bare with me. > > > >This receiver is a 19 inch rack mount voting MastrII receiver. The > >only number stamped on the rear of the chasis is 19D41754GG7. It has > >two optional boards installed, the CG decoder (dip switch version) > >and the status tone (1950hz) generator board. > > > >The 10v regulator board has a model number of 320918G1 REV B. There > >are two fuses on this board and I keep blowing fuse 801. (802 has > >never blown yet) > > > >Interesting enough, I looked inside of another identical (looking) > >receiver, and it's 10v regulator board only has one fuse on it. (but > >that receiver is fine so I ain't messin with it!) If I had to guess, > >I would say that the one fuse board is of older vintage than my 2 > >fuse board based on appearance only. (it just looks older, caps, etc.) > > > >With the receiver now on the bench I'm feeding it with 13.8 volts > >from my Astron VS12M. The ammeter goes up just over an amp and then > >fuse 801 blows. I removed the IFAS board from the chasis and the > >receiver now draws close to nothing, the 10v regulator measures > >10.01, and no fuses blow. Put the IFAS board back in, fuse 801 blows > >again. SoI put in another IFAS board, and again my fuse 801 > >blows. Needless to say, I'm not sure what the problem is yet. > > > >I have no documentation so I can't help with LBI's. Not sure if I > >should replace the two caps on the 10v board (200uf at 18v and 400uf > >at 18v) because the 10 volts looks great when there is no IFAS board > >installed. > > > >SoI ponder my next move > > > >Adam N2ACF > > > >At 20:37 12/11/2007, you wrote: > > >Adam, > > > > > >I am struggling to understand which receiver you have, so that I can > > >understand where the fuse is in the circuit. I am fairly new to the GE > > >radio scene, so I hope you will indulge me a little. > > > > > >It will help me, and perhaps a few others, if you identify exactly what > > >model or combination radio receiver you have, and which LBI you are > > >referring to. As one who submits scanned LBIs to the GE Master Index, I > > >really want to know about any LBIs that are lacking, so that I > can locate a > > >needed hard copy and fill that void. Thanks! > > > > > >73, Eric Lemmon WB6FLY > > > > > > > > >-Original Message- > > >From: > > <mailto:Repeater-Builder%40yahoogroups.com>Repeater-Builder@yahoogroups.com > > >[mailto:[EMAIL PROTECTED] On Behalf Of Adam C. Feuer
RE: [Repeater-Builder] GE MastrII Auxiliary Receiver
Hi Eric, I went back to the site today and pulled the receiver chasis. I'm more of a "SpectraTac" person myself so bare with me. This receiver is a 19 inch rack mount voting MastrII receiver. The only number stamped on the rear of the chasis is 19D41754GG7. It has two optional boards installed, the CG decoder (dip switch version) and the status tone (1950hz) generator board. The 10v regulator board has a model number of 320918G1 REV B. There are two fuses on this board and I keep blowing fuse 801. (802 has never blown yet) Interesting enough, I looked inside of another identical (looking) receiver, and it's 10v regulator board only has one fuse on it. (but that receiver is fine so I ain't messin with it!) If I had to guess, I would say that the one fuse board is of older vintage than my 2 fuse board based on appearance only. (it just looks older, caps, etc.) With the receiver now on the bench I'm feeding it with 13.8 volts from my Astron VS12M. The ammeter goes up just over an amp and then fuse 801 blows. I removed the IFAS board from the chasis and the receiver now draws close to nothing, the 10v regulator measures 10.01, and no fuses blow. Put the IFAS board back in, fuse 801 blows again. SoI put in another IFAS board, and again my fuse 801 blows. Needless to say, I'm not sure what the problem is yet. I have no documentation so I can't help with LBI's. Not sure if I should replace the two caps on the 10v board (200uf at 18v and 400uf at 18v) because the 10 volts looks great when there is no IFAS board installed. SoI ponder my next move Adam N2ACF At 20:37 12/11/2007, you wrote: >Adam, > >I am struggling to understand which receiver you have, so that I can >understand where the fuse is in the circuit. I am fairly new to the GE >radio scene, so I hope you will indulge me a little. > >It will help me, and perhaps a few others, if you identify exactly what >model or combination radio receiver you have, and which LBI you are >referring to. As one who submits scanned LBIs to the GE Master Index, I >really want to know about any LBIs that are lacking, so that I can locate a >needed hard copy and fill that void. Thanks! > >73, Eric Lemmon WB6FLY > > >-Original Message- >From: Repeater-Builder@yahoogroups.com >[mailto:[EMAIL PROTECTED] On Behalf Of Adam C. Feuer >Sent: Tuesday, December 11, 2007 3:49 AM >To: repeater-builder@yahoogroups.com >Subject: [Repeater-Builder] GE MastrII Auxiliary Receiver > >Hello All, > >Yesterday, I had to go up the mountain to the repeater site because I >noticed that my GE voting receiver was not working. When I got there, >I found that one of the fuses had blown. I believe it was fuse 801 >and it had a 1amp glass fuse in it. > >Not being fully equipped to trouble shoot ( I actually left work due >to curiosity to see what was wrong) I simply replaced the fuse and >the receiver came back to life working perfectly. I checked it >periodically on my way back to work and home for the night and it was >working fine. > >I come to wake up this morning and the receiver is dead >again. Before I attempt to sneak out of work today, has anyone seen >this fuse blow multiple times in this 19inch rack mount receiver? >This particular receiver is being fed with an external 12volt source >(not a supply attached to the receiver) that feeds other 12volt >devices which are all working fine. I'm going to stop at the local >two way shop and see if I can find a diagram but until then, I was >wondering if anyone has had this trouble before. > >Thanks in advanced. > >Adam N2ACF > > > > > > > > > > > >Yahoo! Groups Links > > >
Re: [Repeater-Builder] GE MastrII Auxiliary Receiver
Doug & Jim, Thanks for the replies. I will check all of the caps etc. when I can get back to the site. I didn't take a good look at yesterdays fuse but it looked as if it had blown and not melted. I will definitely look at the second fuse a little closer when I get up there. Jim, I'm familiar with having a speaker load on the mobiles when converted to repeater but didn't think of that on this auxiliary receiver. It's been up there for about 10 years now and I never even thought of using a speaker or considering a load for it. I'll have to take a closer look and see what, if anything is done for that particular receiver where typically you wouldn't have a speaker or anyone to listen to it. Thanks again guys! Adam N2ACF At 09:32 AM 12/11/2007, you wrote: >I would put an ammeter in series with the receiver and >check the current being drawn. You may have a filter >cap going bad and the current may be up near the 1 Amp >fuse rateing. Sometimes a fuse being operated near >its rateing will not blow immediately, but will blow >hours after it is replaced. Also make sure the >receiver speaker output has a load. GE receiver audio >amps tend to oscillate if the speaker load is lost. >You may or may not hear this in the audio output >depending on where the output is tapped. > >73 - Jim W5ZIT > >--- "Adam C. Feuer" <[EMAIL PROTECTED]> wrote: > > > Hello All, > > > > Yesterday, I had to go up the mountain to the > > repeater site because I > > noticed that my GE voting receiver was not working. > > When I got there, > > I found that one of the fuses had blown. I believe > > it was fuse 801 > > and it had a 1amp glass fuse in it. > > > > Not being fully equipped to trouble shoot ( I > > actually left work due > > to curiosity to see what was wrong) I simply > > replaced the fuse and > > the receiver came back to life working perfectly. I > > checked it > > periodically on my way back to work and home for the > > night and it was > > working fine. > > > > I come to wake up this morning and the receiver is > > dead > > again. Before I attempt to sneak out of work today, > > has anyone seen > > this fuse blow multiple times in this 19inch rack > > mount receiver? > > This particular receiver is being fed with an > > external 12volt source > > (not a supply attached to the receiver) that feeds > > other 12volt > > devices which are all working fine. I'm going to > > stop at the local > > two way shop and see if I can find a diagram but > > until then, I was > > wondering if anyone has had this trouble before. > > > > Thanks in advanced. > > > > Adam N2ACF > > > > > > > > > > > >Never miss a thing. Make Yahoo your home page. >http://www.yahoo.com/r/hs > > > > > >Yahoo! Groups Links > > >
[Repeater-Builder] GE MastrII Auxiliary Receiver
Hello All, Yesterday, I had to go up the mountain to the repeater site because I noticed that my GE voting receiver was not working. When I got there, I found that one of the fuses had blown. I believe it was fuse 801 and it had a 1amp glass fuse in it. Not being fully equipped to trouble shoot ( I actually left work due to curiosity to see what was wrong) I simply replaced the fuse and the receiver came back to life working perfectly. I checked it periodically on my way back to work and home for the night and it was working fine. I come to wake up this morning and the receiver is dead again. Before I attempt to sneak out of work today, has anyone seen this fuse blow multiple times in this 19inch rack mount receiver? This particular receiver is being fed with an external 12volt source (not a supply attached to the receiver) that feeds other 12volt devices which are all working fine. I'm going to stop at the local two way shop and see if I can find a diagram but until then, I was wondering if anyone has had this trouble before. Thanks in advanced..... Adam N2ACF
Re: [Repeater-Builder] Yaesu FLT-1011 on 6m band.
I have two of them, a 24-channel radio and one of the 99-channel units - both work just fine. You need the older software to program the 4-12-24 channel radios, and a newer version of the software for the 99-channel radios. No hacking needed. The radios will have to be re- aligned. You're welcome. At 10:23 PM 12/9/07 -0500, you wrote: >Hi group, > >Maybe one of you has Yaesu FTL-1011 programmed on 6m band? > >I'm planning to buy this radio (38-50MHz split) ant I want to use it on >53.39MHz. > >Is it a good radio or not? Can I program out of band without trouble? > >Thank you. > >Eric VE2VXT - Adam -
Re: [Repeater-Builder] Re: Part 97 question reference to Repeater control
it is a good idea to review the most current copy of Part 97. The ARRL book is excellent for that. As for using the WiFi router for Repeater control, you would have to lock it down very well, use special firmware, or some non-ham script kiddie will attempt a DoS attack (denial of service). You can try all you want but you will be locked out unless you have a smart way to ignore a data attack. Most operators hang two receivers on the input and a few minority even use the output frequency. You just have to know how to do it. Adam kb2jpd
Re: [Repeater-Builder] Part 97 question reference to Repeater control
Most 2M Repeater operators use their input free so I think you know what that means. On 11/7/07, MCH <[EMAIL PROTECTED]> wrote: > But where does it require a control link (AUX station) to control the > repeater? (or landline ot local) > > Joe M. > > Adam Vazquez Kb2Jpd wrote: > > > > and there is a update in Part 97 where the control link frequency > > limit of 220 MHz has been lowered to 144 MHz. See QST for details. > > > > Adam kb2jpd >
Re: [Repeater-Builder] Part 97 question reference to Repeater control
and there is a update in Part 97 where the control link frequency limit of 220 MHz has been lowered to 144 MHz. See QST for details. Adam kb2jpd
[Repeater-Builder] Quintron / Glenayre Universal Exciter
Hello All, I have on the bench a working universal exciter presently on 931.7125. I need to obtain a new channel prom for it with two new frequencies in it for the ham band. Does anyone out there have this ability in which I could purchase from? If so, please reply off list with how much for the prom and two frequencies burnt into it. Thanks in advance! Adam N2ACF
[Repeater-Builder] Re: Uniden sms 930ts
I think we use an Uniden sms model, it seems to be a very poorly built radio, and if I recall, it only operates simplex with LTR data, that is, it will only communicate properly with other sms radios. - Ask a question on any topic and get answers from real people. Go to Yahoo! Answers.
[Repeater-Builder] Re: Tuning Tools
great products, I like to use only the alignment wands with metal inserts or where the entire length is ceramic. fully-plastic tools seem to disintegrate quickly. I am still trying to find a decent tool to align the glass-piston type trimmer for the master oscillator in my Cushman CE-3 and CE-5 monitors, it is small and slotted, and I seem to break my plastic tool every time. Adam VE3ZXK - Be smarter than spam. See how smart SpamGuard is at giving junk email the boot with the All-new Yahoo! Mail
[Repeater-Builder] 220mhz Repeater Amp.
Hello All, Looking for any suggestions other than Henry Radio or TE Systems for a 220mhz repeater amp. Preferably 5 to 10 watts in with 100 or so out. Thanks in advanced! Adam N2ACF
RE: [Repeater-Builder] Re: Recommendation - Vane Switch
Thanks guys for the interesting thoughts. All 6 of the PA's are solid state. They are the Quintron / Glenayre 90 watters. At 12:46 PM 7/23/2007, you wrote: > > > If the blower is used to cool a tube pa the thermostat detection > > hardware is probably way to slow. > >I was assuming a SS PA, but maybe that was a mis-assumption. > > > Many vane indicators are of the long arm micro switch type. Easy > > enough to make your own but you can probably find them through > > companies like McMaster, C&H Sales Company, Grainger (all in > > Southern California) and many Heating & Air Conditioning Supply > > Stores. > >I hate vane switches, having seen way too many failures over the years. >Vanes breaking off, microswitches getting stuck due to all of the gunk that >accumulates, etc. Good transmitters use differential pressure sensors to >measure the difference between the two halves of the tube compartment. Too >much differential and you've got a blockage in the tube fins or socket. Not >enough differential and either the blower isn't running, the intake filter >is clogged, or the chimney is blocked. I always monitor stack temperature >too as a backup. > >For a SS PA, I still think a thermostat is the most reliable. > >I had a 5kW watt FM transmitter that somebody bypassed the air interlocks >on. The squirrel cage blower lost a blade and jammed up. Looked like a >miniature version of Cheryobyl in there after all was said and done...and >off to the scrap yard it went (it was 30 years old and due for retirement >anyway). > > --- Jeff > > > > > > > > >Yahoo! Groups Links > > > > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: >7/22/2007 7:02 PM
[Repeater-Builder] Recommendation - Vane Switch
Hello All, I'm looking for information from anyone who has experience and could recommend a good vane switch to be installed on several repeaters. Some of my machines are 2 1/2 hours from my house so visiting them often just doesn't happen. I would like to install a vane switch to monitor the PA Fan and connect the output of the switch into the sites SCADA system. Manufacturer, model #, price, and opinion would be greatly appreciated. Thanks! Adam N2ACF
RE: [Repeater-Builder] Looking for SpectraTAC items
For that much money, that new cord should be able to replace all the bad caps in the SpectraTac supplies too!! Adam N2ACF At 05:44 6/25/2007, you wrote: >Motorola wants $37 for a line cord. >Ridiculous, unless it's made from 24k gold. > >Bob M. >== >--- n9wys <[EMAIL PROTECTED]> wrote: > > > I believe I bought both the connectors and pins from > > Mouser - cannot > > remember the item numbers offhand, but I'll try to > > see if I can look up the > > order. I had to make up three cords for remote RX > > units on my 440 repeater > > system. > > > > And Bob -it'll take me a couple of days to recover > > from 24 hours of straight > > operation. > > > > Mark - N9WYS > > > > -Original Message- > > From: Repeater-Builder@yahoogroups.com On Behalf Of > > Adam C. Feuer > > > > Bob, > > > > If you find those power cords, let me know as I've > > been looking all > > over for them as well. > > > > I have some encoder cards for you. Maybe I'll drive > > up to the hill > > and change my Maxtrac's PL to yours and I'll give > > you a shout. > > > > Adam N2ACF > > > > At 19:47 6/24/2007, you wrote: > > >120VAC USA Power Cord, the one with the "almost > > Molex" > > >connector at the end that plugs into the SpectraTAC > > >receiver or comparator power supply. The plastic > > >shells are available from Motorola, the female pins > > >are NOT. > > > > > >2175 Hz Status Tone Encoder card used in SpectraTAC > > >receiver units. > > > > > >Let me know what you have and how much for each > > item. > > > > > >Thanks. > > > > > >Bob M. > > > > > >Hope everyone is now recovering from Field Day ! > > > > >Need a vacation? Get great deals >to amazing places on Yahoo! Travel. >http://travel.yahoo.com/ > > > > > >Yahoo! Groups Links > > >
Re: [Repeater-Builder] Re: PL-259 type 50 ohm terminations?
I just made my own using carbon resistors and a little practice doing some soldering inside confined spaces. The terminator/adaptor does not make any SWR bumps but it is your wish. Adam Kb2jpd On 6/20/07, skipp025 <[EMAIL PROTECTED]> wrote: Hi Joe, It's what I'm doing now... but I do have one PL-259 termination and I'd like to find/buy others. I'm trying to get away from the adapter method. Still looking to see who makes/sells them and where... cheers, s. > [EMAIL PROTECTED] wrote: > > Why not use an adapter on what you have? > > Joe > > -- Original message -- > From: "skipp025" <[EMAIL PROTECTED]> > > Re: PL-259 type 50 ohm terminations? > > > > Anyone know any place/source selling 50 ohm terminations with > > a PL-259 type connector. I've got a ton with N connectors > > but would be interested in picking up some of the 5 to 50 > > or 100 watt pl-259 connector loads. > > > > thanks up front for your reply posts... > > > > cheers, > > skipp > > > > >
Re: [Repeater-Builder] Re: MOTOROLA Rib Error
You should consider using one of the old HP handheld PCs. It uses the old tech and it comes with a comport. Friends of mine have been using it with the old RIB software and its work fine with it. FYI. http://www.google.com/search?q=HP+LX+200&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a Adam Kb2jpd On 5/15/07, Ron Wright, Skywarn Coodinator <[EMAIL PROTECTED]> wrote: Jim, Wonder if this is with one of your radios or is consistant with others. One note is the speed of the computer. RS232 at a particlar baud rate is the same for all computers except for the data speed determind by the time between bytes. Some have commented newer high speed computers work too fast. The radio might not be able to respond quickly enough if the data is fed too fast. I use an old 486. If your situation is intermitment it might be on the edge of where it will work and not work. 73, ron, n9ee/r --- In Repeater-Builder@yahoogroups.com, "Jim Cicirello" <[EMAIL PROTECTED]> wrote: > > Hi Guys, > I am having an intermittent programming problem with my Motorola Rib > Box. This is > one of the after market rib boxes that works great 95% of the time and > the other 5% I get an error message Serial BUS FAILURE POWER FAULT. My > radio is powered up, my battery is good in the rib box and the box is > on, I have used two different cables, and still the error.What would I > look for? I have looked for solder joints on the db25's and all look > good. I have pinned out the cables, all good. Any ideas would be > greatly appreciated. Thank JIM >
Re: [Repeater-Builder] Re: Some East and West Coast Repeaters - Mandate to 5 Watts Max
It is probably tempororay until the Chinese debris is accounted for. The military is interested in knowing what kind of mechanism is used for the anit-sat system. Adam Kb2Jpd On 5/15/07, Nate Duehr <[EMAIL PROTECTED]> wrote: On May 14, 2007, at 2:13 PM, Rick Parrish wrote: > Chuck Kelsey wrote: >> That's not the way it's going to work. Remember, amateur radio is a >> secondary user on this band and the federal government is the primary >> user. If we make too big of a fuss, we could loose it all. > I understand you. My point is ... this is military hardware where > people's lives are at stake. If 50 or so watts is all the enemy > needs to > render the equipment useless ... it shouldn't be used for this > application. Chuck, A conversation I had with some folks who really understand RADAR systems, led to an interesting theory... PAVE-PAWS is probably trying to see/track some VERY small targets, if local UHF repeaters are bothering them. The best scientifically-based theory we came up with off-line, was that the bits and pieces of the results of the Chinese testing their anti-satellite technology against their own bird recently, created so much on-orbit crap and debris, that every available resource that can "see" those bits and chunks -- which are all very dangerous to other satellites and launches, as all on-orbit debris is -- that systems like PAVE-PAWS are being pushed to their limits to see all of it. We may have the Chinese government to "thank" for the recent need to enforce (the rules aren't new) the ERP rules near the RADAR sites. Seems reasonable to me, after thinking about it. And just weird enough to have a ring of truth, considering the strange things that happen in the world. The only unreasonable part of those rules is the complete coverage by those ERP rules of ALL of Arizona... that is probably excessive. But there haven't been reports of it being enforced there, yet. -- Nate Duehr - WY0X
RE: [Repeater-Builder] Motorola Spectra
At 10:38 PM 5/11/07 -0500, you wrote: >Content-Type: text/plain; > charset="iso-8859-1" >X-MIME-Autoconverted: from 8bit to quoted-printable by spam5.bright.net id l4C3dpbP028681 > >I have a Motorola Spectra in a Case with built in power Supply on 800Mhz it >is called a Desktrac It's actually called a "Consolette." Desktracs are a different radio. You said You programmed a 100 Watt Spectra with No >Problem, I also have a VHF And UHF Both 110 Watt Spectra's . I have to >use a LOW MID Power cable for the Base one like You described and a >Different High Power Cable to Program the 110 watt Units I hope this helped > > > >Good Luck > > > >Don KA9QJG >http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd";> > > > > > > > >I have a Motorola Spectra in a >Case with built in power Supply on 800Mhz it is called a Desktrac You said You >programmed a 100 Watt Spectra with No Problem,style="mso-spacerun: yes"> style="mso-spacerun: yes"> I also havestyle="mso-spacerun: yes"> a VHF And UHFstyle="mso-spacerun: yes"> Both 110 Watt Spectra's .style="mso-spacerun: yes"> I have to use a LOW MID Power cable for >the Base one like You described and a Different High Power Cable to Program the >110 watt Units I hope this helped > ns = "urn:schemas-microsoft-com:office:office" /> >Good Luck > style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Don >KA9QJG > > > - Adam -
Re: [Repeater-Builder] Poping Noise
Check your deviation, maybe you are exceeding the bandwidth of your receiver. Adam Kb2jpd On 2/20/07, Shorty Stouffer <[EMAIL PROTECTED]> wrote: Ken Sanders - AE6LA wrote... We just replaced the 1980s era SC-1 controller with an Arcom RC210 and have a poping noise when repeating but not during the voice announcements. Any suggestions for a cure will be appreciated. You might also look at the audio level coming into the controller from the RX. It may be too hot. Should be about 2 volts p-p at fiull system deviation (5 kHz). Jeff (Shorty) Stouffer, K6JSI Home: 760/ 724-4020 Cell: 760/ 716-7033 The WIN System The American Red Cross winsystem.org flataudio.com -- Western Intertie Network www.winsystem.org
Re: [Repeater-Builder] Effects of doubling RF output on UHF repeater?
Spend the money on a more modern receiver designed for repeater ops, get a fresh antenna like a Station Master, and use the best run of heli-ax and premium connectors you can afford and you will see just as much improvement if not better. External power Amplifiers and more power output will do some things you might not like. Your receiver noise floor will increase. Any filters you have in line with the low power setting might now act up on the higher power output. Ditto with the coaxial connectors. You might see more intermod and have to install more gadgets that would go wrong or go wrong when you least want to. Ask yourself if you want a gadgety repeater or one that will operate when the lights go out or even when there is bad weather out there. I build a couple and learned the hard way. Adam Kb2jpd On 2/5/07, Nate Duehr <[EMAIL PROTECTED]> wrote: On 2/5/07, Barry C' <[EMAIL PROTECTED] > wrote: > Upping the power changes the balance , if you really need to fiddle with it > improve the antenna for a boost both ways and at no additional running cost Unless you're running separate antennas, how would changing the gain of the antenna make a difference in additional gain for RX that wouldn't be also seen in additional gain for TX? But unless I'm missing something here (deep nulls and fading due to terrain or something?) the added gain of a better antenna on receive would translate to the same on TX, doesn't it? The only reasonable way to get more RX without affecting TX would be (pre-)amplification of the receive chain and additional filtering if necessary to avoid desense, etc. If there's a suspicion that the system isn't performing as absolutely well as it can on RX, a usable receiver sensitivity test with a weak signal injected into the RX chain with the antenna connected also, would be the way to find out. Jeff's article about measuring the sensitivity of a receiver WITHOUT the site noise/antenna connected is here: http://www.repeater-builder.com/tech-info/receiversensitivity.html And doing it WITH the site noise/antenna is here: http://www.repeater-builder.com/tech-info/effectivesens.html If there's 2 or 3 more dB "available" between the site noise floor and the receiver's best sensitivity measurements -- then sure, maybe you can squeak all of that out with better filters, a good LNA and balance the added TX power. That will take additional money/time/effort beyond just swapping the PA for a bigger one and checking for desense. And... no one's posted this here in the discussion yet... http://www.repeater-builder.com/antenna/3db.html ... which of course, is a good discussion of the situation too, since it actually starts with the same theoretical question (should I add 3dB to my transmitter?) and tackles the analysis of adding 3dB to a system mathematically. Hopefully the above articles help. And if you haven't done the Effective Sensitivity test, do it BEFORE you make any changes. It will give you a baseline so you know if relatively you're making things better, or worse, overall on RX. Nate WY0X
[Repeater-Builder] KXN1029 Channel Elements
Hello All, I'm looking for three or four KXN1029 channel elements for a 900mhz project. If anyone has some that they would like to part with, please email me off list. Thanks! Adam N2ACF [EMAIL PROTECTED]
Re: [Repeater-Builder] Mini Audio Amplifier time...
I agree with Skipp - I use mine for testing all the time. I also agree with Scott - make certain you add some blocking caps to the input, lest you should make smoke. I wish I could mount mine into my line test meter... At 09:20 PM 1/2/07 -, you wrote: Skipp's comments: >Mini Audio Amplifier time... > >It would be some of the best money spent on handy test gear if >many of you picked up a Radio Shack Mini Audio Amplifier. > >Part Number: 277-1008 > >http://www.radioshack.com/product/index.jsp?productId=2062620&cp > >Runs $12.99 and based on the time it will save you... well >worth the buck'ola's you'll spend. Scott's comments: >Be sure to add a DC blocking capacitor to the input leads. The factory >input runs right into the top of the pot. If you try to monitor any audio >paths that have a DC bias on them, it will fry the volume pot. :( I would >suggest at least a 4.7uF preferred non-polar. - Adam -
Re: [Repeater-Builder] Successfully ordered SW for MSF5000..
At 03:26 PM 12/10/06 -0800, you wrote: >Do a Google search for a copy of Moslo or Mo Slo software. It is a do nothing loop that causes a fast computer to slow down and run all the old DOS programs. It also works on games to slow them down for younger players. Now this is a trip in the "Way Back Machine"! > >Jack >K6YC This doesn't help if the com port speed is way too fast - older machines have the right uarts in them that work at the speeds the DOS software expects to see. You can trick the software by slowing down the CPU, but it may not read or write with a new machine with new serial equipment... - Adam -
Re: [Repeater-Builder] Re: how to build a very simple repeater
Hi from Adam Kb2jpd You can do a real simple repeater controller using some 555/556 timing chips in monostable mode.Look at any Forest Mimms 555 cookbooks. He did quite a few decent circuits. As for the ID timer requirement, You can get any 1200 packet TNC that has morse code ID that you can program with a laptop. Some good TNCs even have a hardware/software Carrier operated Switch included. Maybe you can tell us what you want, unless you want a real challenge like a tube repeater controler ? Adam
Re: [Repeater-Builder] Problem of repeater after lighting striked RX antenna
The lightning did create some damage. Since you are stating it is in the receiver, you will have to check the antenna , the feedline, and any ancillary components connected to the former. If you did not have any lightning protection, then either the antenna or one of the connectors arced over and did the job for it. You can find out by either using an swr analyzer that will work in a high rf environment or simply get a low power ht and swr meter and get the swr on the antenna. If it is high, at least you will have a direction to go for your investigations. Adam Kb2jpd Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] RE: Need a Motorola Publication...
> >interference reduction, and EMP protection for C-E facilities. > >Whatever "C-E" facilities are maybe communications and electronics ?? > All over our shop, which used to be Motorola-owned, are asset stickers which say 'Motorola C & E' - it's been told to me that this stands for 'Motorola Communications and Electronics.' Your assumption is astute... - Adam - Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Winegard TV pre-amps
JOHN MACKEY wrote: > It seems to me that this group has had discussions before about Winegard TV > pre-amps causing wide-band RF noise. Does anyone know if there is a good > model of TV pre-amp that works for the job intended but does not cause the RF > noise? > > thanks > > > Try Motorola. They are built. Adam Kb2Jpd Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Ht repeater maker?
Gary wrote: > I am looking to build up a low powered portable repeater. > Using a couple of HT's. Is there any very basic (with ID) controller > out there to handle speaker out audio and generate its won COR and PTT > > Gary > > > Did you start with Google? : http://www.google.com/search?q=ht+repeater+controller&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official There are a lot of kits and pre-assembled stuff out there. I find them every once and awhile in the used gear section in AES. Don't forget to get a copy of Part 97 or whatever rules you are under in your region. In the US, remote repeater control can only be done from 222 up. Do 2m and you may get into a bit of trouble. Good luck. Adam Kb2jpd > > > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] IC-2200H Digtal Repeater?
atms169 wrote: > I want to attempt to setup a Digital Repeater on VHF using the Icom > IC-2200H with optional board. > > I would like the D-Star system but, Hams here seem to avoid paying for > that kind of money. So I would like to compensate and try something > different. > > Has anyone ever attempted this? > > Did it work or has it worked well for you? > > Any information would be helpful. > > Aaron > VA6AE > > For reference: http://www.icomamerica.com/products/amateur/2200h/ The D-Star is an open standard so it is hoped domestic hams would get the soldering irons out and design their own versions for the various manufacturers. The IC-2200H looks like it has the prior generation digital board with the same modem but not the D-Star software in it. You would have to upgrade the radio (read, sell the radio and get the newer model) to the new mobile D-Star dual-band radios just published in QST. It is not a "so sorry" situation. If you wanna play and burn out your new 2200, it is your money. I would think it would make more sense to buy some commercial grade gear that has the bandwidth for the digital signaling and the duty cycle for it. Use that for the digital repeater system. BTW, There has been little mention of the flexibility of the digital protocols on simplex repeaters and links as well as the full duplex repeaters. I hope your experimentation pans out. I miss the old days with the PC Clones where they would leave a copy of DEBUG in the BIOS or a back door in some of the software. We need more hooks in the new software so we can get back to the future. Pity there is little of that in the land of the rising sun. Adam Kb2jpd Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Fan timer
Chuck Kelsey wrote: > Maybe I'm missing something here, but I've never subscribed to the theory of > having fans run beyond PTT. What purpose does it serve? The transistors are > generating heat only when they are "on." As soon as they are "off" they > begin to cool down on their own. If the fans are doing their job, they are > keeping temperatures to a prescribed level the entire duration of transmit. > While running the fans beyond the end of transmit will cool the finals after > the end of the QSO quicker than without, why should it matter? > > Chuck > WB2EDV > Hello from Adam Kb2jpd Fan timers are necessary whenever people are in close proximity to air cooled electronic equipment. However, in the vein of Repeater-Builder, most repeaters are installed in hostile installation environments adjacent to other heat-producing electrical and electronic equipment. Most of my installations have been in carbon coated elevator rooms with temperature ranges from 80 degrees F to 130 degrees F. Fan timers without temperature input sensors are not a real help here. If you want to install an fan, it has a purpose, to move air. A lot of times, it amazes me to see how much equipment is designed with no temperature sensor to monitor and throttle the cooling system of these repeater systems. It also amazes me that some fundamental equipment necessary for repeater operation was not designed with physics of thermodynamics in mind. Last repeater I designed, I made sure a heat channel was in back , vents to allow heated air to rise were in place , vents on the bottom for whatever cool air entered, air filters on the bottom were installed. I bought an repeater ampilifer and my partner installed it and it lasted all of 24 hours. He took the puffin fan array I had in there blowing the hot air up and away and was blasting it with downward hot air. Nice. You can design one fan timer with two ro more inputs using transistor or usual list of suspects like the 555. 73 Adam Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] very close frequencies seperation
Usually, you use a backbone frequency on a different band (in the US 220 Mhz &
up) or a dedicated dc controlled phone line so you can have the desired linking.
It is difficult, but not impossible, to link on the same band. Is that you will
thinking of implementing.?
Adam Kb2Jpd
-Original Message-
From: "Ian Wells" <[EMAIL PROTECTED]>
Subj: [Repeater-Builder] very close frequencies seperation
Date: Mon Mar 27, 2006 4:21 pm
Size: 2K
To:
v\:* {behavior:url (#default#vml);} v\:* { BEHAVIOR: url
(#default#vml) } Hi guys .I am trying to receive 473.575mhz from a 25
watt repeater ,line of sight, 50kms away and and retransmitt it on 473.200 at
25 watt on another site.The transmitt antenna is a 6db vertical ,9 meters above
ground and the rx antenna is a 6 db uhf beam 1-2 meter above ground ,aimed at
the 473.575 site Is it possible to notch out frequencies going into a receiver
that are275 or 375 khz off a uhfreceive signal or is it going to be too close
to filter outthe TX .
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
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