Re: [Repeater-Builder] Need transistor for SCR200A
Hello Morris, My schematic for the SCR-200 dated 5-17-82 shows Q101 as an MRF901 transistor. My schematic dated 7-22-86 shows it as a 6033. 73, Joe, K1ike Morris Dillingham wrote: Hi Guys, I’m new to the list and have been just lurking and reading the mail but now I can use some help finding a replacement transistor. It’s for a Spectrum Communications Corp SCR200A receiver. The transistor in question is the input RF transistor. The schematic is difficult to read for the part number but it appears to be 6033. I can find no cross reference to this and could use either direction to a replacement or a scrapped SCR200A that I can salvage one from. I know it would be best to replace the receiver with a newer one but the club doesn’t want to spend any more money than they have to on this old, old repeater. I have refurbished the power supply and the transmitter and controller had been replaced earlier so I feel it’s worth some effort. Thanks for any help rendered. 73 de Morris KI4IUA Yahoo! 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/
[Repeater-Builder] VHF Duplexer Wanted
If anybody has a Sinclair Q202GR-1 model duplexer or a TX/RX 28-37-02A model duplexer. I am in the process of rebuilding the club repeater system and need to replace the old duplexer that is older than dirt. If you have such a unit that will work would you please contact me OFF THE LIST to cut down on the repeat email traffic. k7...@comcast.net Thanks, Mike K7PFJ 303-954-9693
Re: [Repeater-Builder] Re: off site extra RX
Haven't been following this thread that closely, but if Mobile to repeater coverage in your downtown core area is good but HT coverage is marginal, (and coverage everywhere else is acceptable) why not 1. try a preamp on your repeater receiver or 2. consider changing out the cabling from the repeater antenna all the way back to the receiver to reduce line loss to a minimum. A 6-10 db gain preamp should bring the HT's up out off the background equal to the mobiles. Maybe you could borrow on long enough to try it out and see it it helps before you invest in one. I run preamps on all my UHF repeaters without any problems. VhF is another thing because of the narrow spacing on the Ham band but if you have a wide spaced VHF system it should work as well. Reducing you cable line loss , plus a good tuning of the receive side of the duplexer and repeater reciver wouldn't hurt either, if you haven't already done so. My 2 cents worth. -- Doug N3DAB/WPRX486/WPJL709 Rick Szajkowski va3r...@gmail.com wrote: = its not a voted system .. the repeater is a Harris Radio Phone repeater and I was looking at a Ge Phoenix VHF to UHF to the repeater site UHF phoenix to the controller again just to help cover the HT's in town .. ( small town ) Was thinking just a simple J pole for the VHF side does not need a lot of gain and will be on the roof of a 2 story building like I said just an idea to extend coverage to handies in the down town core .. every where else the coverage is fine coverage for handies is spotty down town .. mobiles are fine On Sat, Feb 21, 2009 at 10:33 PM, Laryn Lohman lar...@hotmail.com wrote: --- In Repeater-Builder@yahoogroups.comRepeater-Builder%40yahoogroups.com, rtc_0001 rtc_0...@... wrote: Problem #1: Unless you incorporate an adaptive delay into each audio path, you'll have audio arriving out of sync from the various rcvrs. This is where your echos will come from. The microseconds of difference would not be the issue. It's when you mix a noisy receiver's audio with a full quieting receiver's audio, the result is noisy audio. You can't (usefully) mix the two. Problem #2: Your audio will probably comprise unequal freq responses due the different rcvr link characteristics. True, problem #2 will need (at least should) to be solved if you use a voter. And it's relatively easy, especially if you use the same brand/model of radios for each portion of the system. In other words, matching/same units for the remote receivers, again for the link transmitters, and once more for the link receivers. So you could use Mastr IIs for the link transmitters and Micors for the link receivers, no problem. With the four receivers on our voting system, I've not had to do any special EQing for reasonably good audio, with little difference between receivers. For more on voting systems: http://www.repeater-builder.com/tech-info/votingcomparators.html http://www.repeater-builder.com/tech-info/remotereceivers.html Laryn K8TVZ
Re: [Repeater-Builder] M/A-Comm M7100 Interface
Scott; It is the same as Orion It also depends on exactly what cables and/or connector you are pulling from... External PTT and COR need to be mapped in software to external I/O pins.. not all appear on each cable One downside, as of most recent info I have, there is no constant audio output eq to vol hi per-se... it is all subject to control of the volume control. Local volume affects remote volume... Doug KD8B At 06:18 PM 2/21/2009, you wrote: Can anyone out on the list provide pinouts for the accessory connector on a M7100 mobile? I could like to get TX and RX audio as well as PTT and COS. Thanks, Scott
RE: [Repeater-Builder] Need transistor for SCR200A
Hi Joe, That's a big help. I saw what appeared to be 106 printed on the transistor but the schematic said 6033. With the information you provided it must be a MRF901. All I had to do was stand on my head and read it correctly. It appears that you have the solution to my problem and I am grateful for your response. Thanks to you and the providers of this list for a great resource. 73 de Morris KI4IUA -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Joe Sent: Sunday, February 22, 2009 9:30 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Need transistor for SCR200A Hello Morris, My schematic for the SCR-200 dated 5-17-82 shows Q101 as an MRF901 transistor. My schematic dated 7-22-86 shows it as a 6033. 73, Joe, K1ike Morris Dillingham wrote: Hi Guys, I’m new to the list and have been just lurking and reading the mail but now I can use some help finding a replacement transistor. It’s for a Spectrum Communications Corp SCR200A receiver. The transistor in question is the input RF transistor. The schematic is difficult to read for the part number but it appears to be 6033. I can find no cross reference to this and could use either direction to a replacement or a scrapped SCR200A that I can salvage one from. I know it would be best to replace the receiver with a newer one but the club doesn’t want to spend any more money than they have to on this old, old repeater. I have refurbished the power supply and the transmitter and controller had been replaced earlier so I feel it’s worth some effort. Thanks for any help rendered. 73 de Morris KI4IUA Yahoo! Groups Links Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.2/1965 - Release Date: 02/21/09 15:36:00 No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.2/1965 - Release Date: 02/21/09 15:36:00 Yahoo! 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/
[Repeater-Builder] Re: off site extra RX
I'm going to suggest another Poor man's voter despite the probability that someone, somewhere, has already done so. I was thinking you might go ahead build your 2nd rcv site with a one way link to the main tx. However, you would rely on the link activation to vote the rx signal into the tx audio path. In operation, the link rx at the main site will force an audio gate to route the link rx audio to the main tx. A careful setting of the squelch at the remote rx will allow the main site rx to do most of the work but when the main site isn't hearing the portables well enough, the remote rx will. This is when the link audio gets switched in. There'll be a period of trial error tweaking of the remote's squelch but it can be done.You'll still want to make efforts to equalize the audio freq responses of all paths involved. I'm sure you can find a way to make the switching fast. Its not an ideal solution but it keeps operation mostly transparant to the users. ie. They don't need to remember to change PL's or channels. --- In Repeater-Builder@yahoogroups.com, Chuck Kelsey wb2...@... wrote: Someone else suggested the poor man's voter by simply requiring a different PL tone for the other receiver. Users simply need to know which tone to use for each area. The other solution is to simply link in a low profile repeater at the desired location. This could even be on a different band. Again, users would need to understand this as well. Chuck WB2EDV
Re: [Repeater-Builder] Need transistor for SCR200A
That's what this list is all about. I'm glad you found the answer to your question. Now it's my turn, I will be posting a question about MASTRII PA amps. 73, Joe, K1ike Morris Dillingham wrote: Hi Joe, That's a big help. I saw what appeared to be 106 printed on the transistor but the schematic said 6033. With the information you provided it must be a MRF901. All I had to do was stand on my head and read it correctly. It appears that you have the solution to my problem and I am grateful for your response. Thanks to you and the providers of this list for a great resource. 73 de Morris KI4IUA Yahoo! 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/
[Repeater-Builder] MASTRII 100 watt PA question
Hello list dwellers, I went to our repeater site today and found the MASTRII PA dead. I could hear the exciter on my HT and the exciter output checked out OK at 250mw. There was good DC to the PA deck, but no current draw. I checked the usual suspects, the 2 buss wires that carry the DC, the RCA phone jack input, loose connections. etc. Nothing appeared to be bad. I pulled it out and put it on the bench and now it works. The major symptom was no current draw. I can't find a thing wrong at this point. Any ideas? 73, Joe, K1ike Yahoo! 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/
RE: [Repeater-Builder] Audio Intelligence Devices BXR-2200A Briefcase Repeater
At 2/21/2009 13:29, you wrote: I believe that you now have a nice Haliburton aluminum briefcase. Perhaps a DC power supply. The duplexer might be usable as some sort of filter for reception in the high VHF range Unless you are licensed for something in the high section of VHF the rest is just a pile of parts. Of course you can spend a lot of time finding that out the hard way. Are you sure? Bear in mind that G.E. Mastr IIs, Exec IIs MVPs originally setup for 171 MHz will tune right down to 2 meters, both TX RX, no problem. Now if the above was made from Motorola boards, yeah I believe it wouldn't move that far. Bob NO6B
RE: [Repeater-Builder] MASTRII 100 watt PA question
Joe, Use a magnifying glass to closely check every solder joint for cracks. Some such cracks appear due to temperature cycling over time. I have already had the same problem, where a PA was dead at the site but worked fine on the bench. It was around 40 degrees at the site, but around 70 at the bench. Sure enough, a tiny crack had opened on a PA power lead. Reflowing solder at that connection cured the problem. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Joe Sent: Sunday, February 22, 2009 4:56 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] MASTRII 100 watt PA question Hello list dwellers, I went to our repeater site today and found the MASTRII PA dead. I could hear the exciter on my HT and the exciter output checked out OK at 250mw. There was good DC to the PA deck, but no current draw. I checked the usual suspects, the 2 buss wires that carry the DC, the RCA phone jack input, loose connections. etc. Nothing appeared to be bad. I pulled it out and put it on the bench and now it works. The major symptom was no current draw. I can't find a thing wrong at this point. Any ideas? 73, Joe, K1ike Yahoo! Groups Links
[Repeater-Builder] WTB: Mitrek Mounting Plates
I need two mounting plates for the trunk mounted transceiver. Also looking for a low power Mitrek to be used as a receiver on 147 MHz. Randy WB0VHB
[Repeater-Builder] Rack mount enclosures
Hey gang I am tired of scratching and clawing for 1 Rack Unit 19 enclosures for controllers. Does anyone have a source for these at a reasonable price? Thanks Tim
Re: [Repeater-Builder] Rack mount enclosures
Oddly enough, the last 3 I've used for repeater controller came from Power Strip/Surge Suppressor surplus auctions off of eBay... Once I removed all of the AC outlets and covered the unneeded holes with flat aluminum stock from the Home Depot, it gave me plenty of room to mount the controller boards. The power outlet strip, shipping and the flat aluminum stock altogether was probably less than $20. 73s, AJ, K6LOR On Sun, Feb 22, 2009 at 8:12 PM, Tim Osborne radio1...@gmail.com wrote: Hey gang I am tired of scratching and clawing for 1 Rack Unit 19 enclosures for controllers. Does anyone have a source for these at a reasonable price? Thanks Tim
RE: [Repeater-Builder] Rack mount enclosures
Tim, Scratch and claw no longer. Marlin P. Jones has just what you want, for 20 bucks each. I just bought two of them. Go here: www.mpja.com/prodinfo.asp?number=17086+BX 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tim Osborne Sent: Sunday, February 22, 2009 7:12 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Rack mount enclosures Hey gang I am tired of scratching and clawing for 1 Rack Unit 19 enclosures for controllers. Does anyone have a source for these at a reasonable price? Thanks Tim
Re: [Repeater-Builder] Somewhat OT - How to make HDTV *really* work
Jacob Suter wrote: Outlook needs a 'trigger lock' on the send button... Also, I have no idea why outlook decided to add a bunch of crap to my email. Guess I should be using a decent mail program! ;c} Yeah-Thunderbird is one of the best ways to go! edits below: C Most preamps I run into are at least 10 years old. Sure they might still work, but RF transistor technology has sure improved in the last few years. These amps are *not* going to pass DTV acceptably. That's the gripe. If I put up an antenna that works fine for analog, there is no excuse for it NOT to work with digital, except that digital must be crap. Rf is RF. Virtually everybody I have talked to has had nothing but problems with DTV. Invariably they get fewer channels, and stations that are good to excellent in analog can frequently be unwatchable in digital. To see a digital as reliably as an analog is the exception, not the rule.
RE: [Repeater-Builder] Somewhat OT - How to make HDTV *really* work
To: Repeater-Builder@yahoogroups.com From: wd8...@gmail.com Date: Mon, 23 Feb 2009 00:19:15 -0500 Subject: Re: [Repeater-Builder] Somewhat OT - How to make HDTV *really* work Jacob Suter wrote: Outlook needs a 'trigger lock' on the send button... Also, I have no idea why outlook decided to add a bunch of crap to my email. Guess I should be using a decent mail program! ;c} Yeah-Thunderbird is one of the best ways to go! edits below: C Most preamps I run into are at least 10 years old. Sure they might still work, but RF transistor technology has sure improved in the last few years. These amps are *not* going to pass DTV acceptably. That's the gripe. If I put up an antenna that works fine for analog, there is no excuse for it NOT to work with digital, except that digital must be crap. Rf is RF. or the point of resonance is not suitable for dt so it's deaf Virtually everybody I have talked to has had nothing but problems with DTV. Invariably they get fewer channels, and stations that are good to excellent in analog can frequently be unwatchable in digital. To see a digital as reliably as an analog is the exception, not the rule. So you suggest the physics in your part of the world differs from over here? as so far digital in my country has been successful with large distances also between set and tx . What is your explanation for such a thing _ Get rid of those unwanted christmas presents! Get what you want at ebay. http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Frover%2Eebay%2Ecom%2Frover%2F1%2F705%2D10129%2D5668%2D323%2F4%3Fid%3D10_t=763807330_r=hotmailTAGLINES_m=EXT
[Repeater-Builder] Re: Complex Skywarn Paging System
A 30 second DTMF blast? I think I'd use the first several milliseconds of that to switch the radio to a useful channel. 'JK --- In Repeater-Builder@yahoogroups.com, dallasreact112 dallasreact...@... wrote: I am just curious if any other amateur 2 meter repeater has a more complex RACES Skywarn paging system than the 146.88 W5FC Dallas TX repeater? The normal daytime amateur state of the repeater is 110.9 Hz full PL. To go into RACES Skywarn mode the following sequence occurs: 1. Repeater Mode changes: a. PL changes to 114.8 Hz b. RX squelch changes to OR mode squelch. Carrier squelch OR 114.8 Hz PL encode opens repeater. OR squelch allows the carrier squelch threshold to be set higher than PL squelch threshold. 2. RACES Tones out: a. 30 second DTMF A tone b. Motorola 2 tone sequential pager tones group 1 c. Motorola 2 tone sequential pager tones group 2 d. DTMF 0 sent three times in quick succession to activate the old Kenwood DTMF paging decoders available in their older units. I would love to hear from anyone that has a more complex paging routine. 73 Bernie Parker K5BP Dallas Amateur Radio Club Tech Officer
Re: [Repeater-Builder] Somewhat OT - How to make HDTV *really* work
If the digital is on a very different frequency, then the frequency change is a reason why digital reception may be problematic. For example, if you are using a VHF antenna to try to receive a UHF digital signal, that will be problematic. -- Original Message -- Received: Sun, 22 Feb 2009 09:14:14 PM PST From: wd8chl wd8...@gmail.com To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Somewhat OT - How to make HDTV *really* work That's the gripe. If I put up an antenna that works fine for analog, there is no excuse for it NOT to work with digital, except that digital must be crap. Rf is RF. Virtually everybody I have talked to has had nothing but problems with DTV. Invariably they get fewer channels, and stations that are good to excellent in analog can frequently be unwatchable in digital. To see a digital as reliably as an analog is the exception, not the rule.
