RE: [Repeater-Builder] DTV ch 2 vs 6m

2009-01-11 Thread Mark HARRISON
Here in Australia all the digital stations are somewhat lower power than the analogs, so as far as interference to your receivers goes, that may be a saving grace. I would imagine that if you live near a TV station that your front ends will need to have pretty good on intermod performance (I don't

Re: [Repeater-Builder] GLB Preamplifier QA (Part 3)

2009-01-11 Thread Kevin Custer
Know Chip well, see him every year at the Cactus Meetings. Great preamp but cost $110. Would be nice to find a 10-15 db easy to make preamp for 440mhz. http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=actionkey=PR-SERIES Great for sites that don't require pre-selection ahead

Re: [Repeater-Builder] Digest Number 6530

2009-01-11 Thread Jack Davis
Repeater Builder5a. Re: digital TV channels Posted by: MCH m...@nb.net ncc74656_uss_voyager Sat Jan 10, 2009 7:45 pm (PST) That was the original plan, but the TV industry whined about losing them, so they are back in the TV lineup. There is a CH 2 DTV station in Harrisburg, PA. I would

[Repeater-Builder] Repeaters for CERT Use?

2009-01-11 Thread w7trh
Hello Group, A week or so ago, I believe I read on this list, that someone said the CERT groups were allowed to apply for Commercial radio channel(s). Here, on Vashon Island, Wa., we have over 100 CERT members. They are using FRS radios in the field. It makes it very difficult for our EOC to

RE: [Repeater-Builder] Repeaters for CERT Use?

2009-01-11 Thread Peter Dakota Summerhawk
Any group can apply for a commercial band repeater and use it, licensing can be expensive for commercial frequencies though. What we use is MURS for the non hams and then the team leaders are hams and relay the information back to the CP. Might look into seeing if your public service has a

RE: [Repeater-Builder] Repeaters for CERT Use?

2009-01-11 Thread Gary
Tim, Your community public works, police, EOC, and/or fire department are a good place to start. An established public safety agency will have far less trouble getting such a license and, it's often at no cost because public agencies are exempt from fees for Part 90 licenses. Everything can be

[Repeater-Builder] Ramsey Preamplifier Kits...

2009-01-11 Thread skipp025
re: Ramsey Rx Preamplifier Kits. Kevin Custer kug...@... wrote: Great for sites that don't require pre-selection ahead of the preamp. Kevin http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=actionkey=PR-SERIES Excellente' lead... Couldn't ask for a more practical

Re: [Repeater-Builder] Tower Identification

2009-01-11 Thread Kris Kirby
On Wed, 7 Jan 2009, Chuck Kelsey wrote: How can I identify an otherwise unknown tower as Rohn 20, 25, 45, etc. or even another tower manufacturer altogether? I'm printing off the Rohn 25, 45, and 55 section details, but beyond those drawings, I've no other clues to ID the tower.

RE: [Repeater-Builder] Tower Identification

2009-01-11 Thread ka9qjg
Chuck that looks like a Ham Ant beam, Do You know who the Person was that owned it , They might know Good Luck Don KA9QJG

Re: [Repeater-Builder] GLB Preamplifier - Preamp Device (transistor) Information

2009-01-11 Thread no6b
At 1/11/2009 06:12, you wrote: Correct, here is the order info sheet from the wayback machine 73, Joe, K1ike OK, is it just me or is there NO noise figure spec. in any of these documents? My guess is that the GLB preselector consists of the filter followed by the preamp. Also because of

Re: [Repeater-Builder] DTV ch 2 vs 6m

2009-01-11 Thread Hap Griffin
The specifications for digital out of channel noise are tighter than for analog. Also, digital is generally running less power than analog, so the combination of the two should spell much LESS interference on 6m from a channel 2 digital transmitter. Hap Griffin VP - Engineering SCETV -

Re: [Repeater-Builder] DTV ch 2 vs 6m

2009-01-11 Thread Hap Griffin
The DTV mask specifications are tighter for digital than for analog for out of channel noise. In fact, it takes a special setup to even measure it since spectrum analyzers generally don't have the dynamic range to measure it directly. Hap Griffin WZ4O VP - Engineering SCETV - Original

[Repeater-Builder] Re: Tower Identification

2009-01-11 Thread wb8art
It certainly looks like Rohn 45. Randy --- In Repeater-Builder@yahoogroups.com, Kris Kirby k...@... wrote: On Wed, 7 Jan 2009, Chuck Kelsey wrote: How can I identify an otherwise unknown tower as Rohn 20, 25, 45, etc. or even another tower manufacturer altogether? I'm

Re: [Repeater-Builder] Tower Identification

2009-01-11 Thread Chuck Kelsey
It appears to be a 45G, some of which is in not so good condition. Depending on how bad the rust is on the upper part, it might not have much life left. Almost looks like the bottom may have already been painted at one time. Chuck WB2EDV - Original Message - From: Kris Kirby

RE: [Repeater-Builder] Re: OT- Digital TV converter box issues

2009-01-11 Thread Jeff DePolo
At the risk of dragging this OT thread out a little further, I have a tech question. I need to order a number of converter boxes to use as emergency alert system (EAS) receivers (just using the left/right audio outputs, don't care about video). I need to find boxes that will power up

Re: [Repeater-Builder] Re: OT- Digital TV converter box issues

2009-01-11 Thread Alexandre Souza
At the risk of dragging this OT thread out a little further, I have a tech question. I need to order a number of converter boxes to use as emergency alert system (EAS) receivers (just using the left/right audio outputs, don't care about video). I need to find boxes that will power up

RE: [Repeater-Builder] Re: OT- Digital TV converter box issues

2009-01-11 Thread Jeff DePolo
Jeff, you can do that with a $3 microcontroller easily. PVT me if you need some help. If you're hinting at sending IR to turn the box on, and change to the desired channel, after the power failure, I thought of that, but I'm looking for an off-the-shelf solution.

Re: [Repeater-Builder] Re: OT- Digital TV converter box issues

2009-01-11 Thread Alexandre Souza
If you're hinting at sending IR to turn the box on, and change to the desired channel, after the power failure, I thought of that, but I'm looking for an off-the-shelf solution. This is something that needs to be done only once (for all the boxes) and replicated. If you need any help

Re: [Repeater-Builder] DTV ch 2 vs 6m

2009-01-11 Thread Ray Brown
http://www.fda.gov/cdrh/medsun/AudioConf_files/MedicalTelemetryWireless/Lessons_learned.pdf Ray KB0STN - Original Message - From: Hap Griffin To: Repeater-Builder@yahoogroups.com Sent: Sunday, January 11, 2009 4:58 PM Subject: Re: [Repeater-Builder] DTV

Re: [Repeater-Builder] Tower Identification

2009-01-11 Thread Chuck Kelsey
Kris is who was looking to identify it. Chuck - Original Message - From: Don Kupferschmidt d...@httpd.org To: Repeater-Builder@yahoogroups.com Sent: Sunday, January 11, 2009 8:43 PM Subject: Re: [Repeater-Builder] Tower Identification Chuck, I have a rohn tower at my dad's house

[Repeater-Builder] Re: Repeaters for CERT Use?

2009-01-11 Thread Doug Dickinson
Re CERT licensing - If the organization is an association or a corporation, like a club or a public service group, you can license on a commercial frequency. You will have to go with Narrowband though. Wideband channels just are not available on Vashon Island since you are near the Canadian

Re: [Repeater-Builder] Ramsey Preamplifier Kits...

2009-01-11 Thread Jim Brown
I have three of these preamps in service on GE Mastr II 440 repeaters. The tuned circuit in front of the transistor will help a bit with out of band signals. I build a shield from galvanized flashing and put it around the two turn front end coil.  I use these preamps installed in the normal

[Repeater-Builder] Re: GLB Preamplifier - Preamp Device (transistor) Information

2009-01-11 Thread skipp025
Re: GLB Preamplifier n...@... wrote: OK, is it just me or is there NO noise figure spec. in any of these documents? The Philips data sheets give typical noise figures for the BF981 as 0.7 dB at 200 MHz and 0.6 dB at 600 MHz. Curves are provided for determining the source admittance