Re: [Repeater-Builder] 222 repeater conversion documentation for commercial radios?
I am suprized Kevin has not posted ... check hs website repeaterbuilders.com for the 220 stuff god site and lots of info .. best of luck Rick Happy Shopping Day, Dudes It's been suggested to me to convert a real radio to 222 repeater service. I remember docs for that were mentioned and I thought I had saved the URLs but am unable to locate them. I would appreciate being pointed at such docs as well as any/all advice recommendations on building a 222 repeater. TIA 73 Budd Turner : N7EOJ 223.94 224.18 USERS Tucson, AZ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Rick Szajkowski VA3 RZS Charlotte Darby VA3 CMR Node Owners of IRLP Node 2120 Lakefield Ont Canada Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Mitrek Repeater 500 kHz split
How many cans it takes depends on the isolation of each can at your operating frequency. Well, now what you said makes more sense, but a 500kc split is really close. Can't you run a 1meg or larger split in your area? Your filters probably don't have steep enough skirts to do any good at that close of spacing. You can set the loops for max loss and the notches will be the narrowest but then your losses through the filters will be greater. Be sure you use a good double shielded cable between the radio and the notches so the signal doesn't leak in at that point. I'm running 600kc spacing on two meters with a Mitrek but the filters take up most of the rack. They're 2 per side and they are about 10 inches across and 30 inches high. Art - KC7GF Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] 222 repeater conversion documentation for commercial radios?
At 04:48 PM 11/28/03 +, you wrote: Happy Shopping Day, Dudes It's been suggested to me to convert a real radio to 222 repeater service. I remember docs for that were mentioned and I thought I had saved the URLs but am unable to locate them. I would appreciate being pointed at such docs as well as any/all advice recommendations on building a 222 repeater. TIA 73 Budd Turner : N7EOJ 223.94 224.18 USERS Tucson, AZ the URL is easy to remember - it's the web site associated with this group, and web site is the same name as the group but with a www in front and a com at the back http://www.repeater-builder.com Look on the Moto and GE pages. Mike WA6ILQ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Tuning cavity filters
Ian, Since I don't have a network analyzer or a tracking generator, I have consistently used the S meter method to tune my cavities for both the transmit and receive side. It is not recommended to tune duplexers with power applied, because you wind up getting little arcs that leave black carbon spots on the metal contact areas. BUT with all things said, I find I can always get a few more watts out of the transmit side by tuning with power applied for max RF out. My gut feeling is that things change a little under the influence of the high RF levels. Art - KC7GF Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Digest Number 2228
Would like to trade a couple of Moto Syntor UHF for a couple of Moto syntor VHF. Charlie N5TYI Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Tuning cavity filters
I think Ralph hit the nail on the head on this one! All of the major duplexer manufacturers ship their factory-tuned units with a warning that reads something like this: This duplexer has been carefully tuned using precision laboratory instruments, and no further tuning is required before placing the unit in service. If tweaking the factory-tuned duplexer increases the repeater power output or improves the receiver performance, that tells me that either the repeater or the antenna is improperly matched. Here's one example: I have a Yaesu/Vertex VXR-5000 UHF repeater at a nice hilltop site. Although the VXR-5000 is rated at 30 watts continuous duty, the heat sink was getting very hot and my Bird 43 wattmeter said that only 15 watts was making it to the antenna. According to the expected losses in the duplexer and jumpers, I should have had 22 watts or so leaving the duplexer. Knowing that the VXR-5000 repeater uses the M57729H RF PA module, which is known for wildly unstable output impedance, I decided to install a simple device called an impedance matcher on the output connector of the PA. Telewave, EMR, and other sell these devices for about $100, and they are worth it. I installed a Z-matcher and first tuned the PA into a known good 50 ohm dummy load through the Bird wattmeter. I had to reprogram the PA drive level to bring the output down to 30 watts; it was almost 50 watts, and it's a wonder the PA module didn't burn up. I then reconnected the PA output to the duplexer, leaving the Z-matcher in place, and found that I now had exactly the right amount of power going to the antenna. Even after running continuously for 15 minutes, the heat sink was barely warm- indicating that the PA was well matched to the duplexer. The installation of a Z-matcher not only tunes the PA to exactly 50 ohms, providing a perfect match to the duplexer, but it also eliminates having to use a cable of a special magic length to connect the PA to the duplexer. With a Z-matcher in place, the cable length is irrelevant. An impedance matcher can also be installed at the receiver, but the result are far less profound. One other thing, solid-state PAs in general, and the RF PA modules in particular, have different output impedances at different power levels. If your repeater is programmed to reduce its power when on batteries, the PA will no longer be properly matched to the duplexer. Ironically, this impedance mismatch may cause the load on the batteries to drop just a little, while the RF output power drops a lot. Stay tuned... 73, Eric Lemmon WB6FLY Ralph Mowery wrote: I doubt that things will change with the ammout of power, but if you are tuning the duplexer up under operating conditions instead of with instruments I would think it was more of an impedance matching thing... Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [RE: [Repeater-Builder] Motorola Syntor, any good?]
Poor management by amateur repeater operators has gotten MANY repeaters kicked out of locations or barred repeaters from getting into good sites. About a year ago, in Portland Oregon, a local electronics engineer claimed that my repeater was causing interference to his repeater. He offered to help me fix my repeater and loan me test equipment. (He obviously didn't know that I have plenty of my own REAL test equipment) After my refusal to change, he complained to the repeater coordination board (by co-incidence we were BOTH board members!!) Another board member came by to inspect my repeater station his. Finally, they figured out that HIS repeater had a receiver problem. He backed off, but didn't take me up on offers I gave to help fix his repeater or loan test equipment!!! [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I'm afraid if my repeaters looked like the 10M 6M Repeaters in the pictures, I'd be kicked out of the site immediately. Surely this is a SNIP That's why so many hams have a hard time getting good sites - it only takes one person to make it so no other hams will ever have access to a good site - either having a visible mess or an RF mess (lack of good engineering - not using the necessary circulators, cavities, LP filters, double-shielded cables, etc. everywhere). Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]]
FS-GE MastrII 110 watt cont. duty VHF Base/Repeater in 4 foot cabinet with GE 30 amp power supply crystalled up on 146.04/.64, no duplexer or controller. e-mail for pricing [EMAIL PROTECTED] - Original Message - From: ac0y5 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, November 28, 2003 11:55 AM Subject: [Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]] : Thanks for the input Tony. : The primary reason that I'm going to try the Spectrum is It's what I : can afford now and It's something I havn't ran into before. If this : one gives as much trouble as indicated by thoes of you who have : owned them then I'll do something different. But for now it sounds : like a challange and it's real cheep -$0.00-. I unexpectedly came : into two 2 meter pairs at the same time. Here in Central Florida : getting a pair is like finding hens teeth so the first pair got the : MASTRII and the second pair will get the Spectrum until I get tired : of tweeking it or until I get a replacment, another MASTRII. I can : only afford a little at a time. : 73 Tony and Thanks : AC0Y Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] How to wire 2 SyntorX 9000 for repeater opt.
I was look at some of the posts and one of the post's showed a repeater that was 2 Syntor X9000's wired up to a controller. I would like to know how to do this. I have 2 X9000 in the UHF band 100watt and a CSI Shared Repeater tone panel. I looked at Mike's web site and didn't find anything on doing that. This is for a home site repeater and I would like to replace the GR400 with 2 M120's I'm using now. Thank for any help on this Steve M Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Spectrum Communication SCR1000
But it's human nature. Ask a kid if he would like some old stale popcorn right now, or whether he'd rather wait to go to the store later on and buy some new popcorn with his own money. What's his choice going to be? Yep, take the stale stuff and eat it now. Chuck WB2EDV - Original Message - From: JOHN MACKEY [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, November 28, 2003 9:46 PM Subject: Re: [[Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]]] That is one of the major problems that causes bad repeaters, decisions of equipment based on financial inability rather than technical appropriateness. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] How to wire 2 SyntorX 9000 for repeater opt.
Try here for connections http://www.pyramidcomm.com/pdf/svrpdf/AN172.PDF tom n8ies - Original Message - From: Steve [EMAIL PROTECTED] To: [EMAIL PROTECTED]://... Sent: Friday, November 28, 2003 11:37 PM Subject: [Repeater-Builder] How to wire 2 SyntorX 9000 for repeater opt. I was look at some of the posts and one of the post's showed a repeater that was 2 Syntor X9000's wired up to a controller. I would like to know how to do this. I have 2 X9000 in the UHF band 100watt and a CSI Shared Repeater tone panel. I looked at Mike's web site and didn't find anything on doing that. This is for a home site repeater and I would like to replace the GR400 with 2 M120's I'm using now. Thank for any help on this Steve M Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] ICOM IC900 BAND UNIT INTERCONNECT CABLE
i have 2 band units and the remote and control section with remote head fibe optic cable what im trying to fine is the interconnect cables to go between the 2 band units . thanks .bob The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today! Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: PL/CTCSS Filter
--- In Repeater-Builder@yahoogroups.com, Adi Linden [EMAIL PROTECTED] wrote: Just breadboard it Chuck. It only uses one chip (the TL084 is a quad opamp) along with the passive components. If you have a controller that does de-emphasis or you don't want it, a dual opamp like the TL062 should be sufficient. That's what I'll be using. Adi -- In my particular application, the controller is an RLC-2A. I found that it didn't de-emphasize the RX audio well without increasing the value of the de-emphasis input coupling capacitors. Rather than hack the controller, I incorporated a workaround in my HPF circult: I did the de-emphasis there with the first TL084 section, then I used a 27K resistor on the output stage to make the output high impedance. Doing this removes the 300 Hz high-pass rolloff that the 0.1 uF cap on the RLC-2A's port audio input would normally add to the response. If you don't need to do all this, you can as originally stated omit the first audio stage. However, don't remove the 27K resistor altogether. Use at least a 220 ohm resistor on the output, otherwise the opamp may oscillate if capacitively loaded (as little as 100 pF can cause this). Bob NO6B Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [[Repeater-Builder] Spectrum Communication SCR1000]
A recent swapmeet in the northwest Oregon area had UHF Mastr II's at $10 each ... and hi-band Mastr II's at $5 each. He had 50-60 radios at the swapmeet. Neil - WA6KLA JOHN MACKEY wrote: Of course you are correct. The sad part is how many times this has resulted in giving hams a bad name by operating spurious equipment, or not able to perform the way a piece of quality equipment should. It isn't hard to find a Mastr II for $30 at a ham swap meet! Chuck Kelsey [EMAIL PROTECTED] wrote: But it's human nature. Ask a kid if he would like some old stale popcorn right now, or whether he'd rather wait to go to the store later on and buy some new popcorn with his own money. What's his choice going to be? Yep, take the stale stuff and eat it now. Chuck WB2EDV - Original Message - From: JOHN MACKEY [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, November 28, 2003 9:46 PM Subject: Re: [[Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]]] That is one of the major problems that causes bad repeaters, decisions of equipment based on financial inability rather than technical appropriateness. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
