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Grounding with a tower glued to the top
I am seeking advice where the RF feedline grounding/lightning arrestor block should be mounted to. I'm working on a project where the ham station is in the mezzanine of a warehouse where the tower was installed on TOP of the roof, with a seriously over-engineered mount in the middle of the building metal structure. The entire building has a ground rod ring around it that are connected to a 6" copper strap that? does not NOT contact to the building. Near the coax entry point there is a building structural I-beam. The copper ground strap comes up along the outside side of the building, galvanically isolated, through a plastic tube and junction box, into the shack. So, for best lightning/EMP protection: 1. should the ground strap be sandwiched between the building i-beam and the ground block, or, 2. should the ground block be connected to the copper strap secured by some kind of isolating material from the metal building? If typing words is not your forte'; email direct for my cell number. Benjamin, KB9LFZ |
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Re: weird issue
开云体育You often have to tell it specificly to use that
card as it sees the usb device as another sound card.?
----- Original Message -----
Sent: Friday, April 11, 2025 7:02 AM
Subject: Re: [repeater-builder] weird issue It uses the internal one normally ? From: [email protected] <[email protected]>
On Behalf Of Butch-tiny puppy via groups.io ? You probably need to tell jaws what doundcard to use.? ? Butch Bussen
----- Original Message ----- Sent: Friday, April 11, 2025 6:45 AM Subject: [repeater-builder] weird issue ? Hi, ? I hope someone can help me figure out an issue. I am trying to use a West Mountain Radio Rigblaster plug and play sound card interface to run echolink. ? The issue I am running into is that I use JAWS a screenreader that reads text outloud from the computer since I am totally blind. When I have my nomic working JAWS talks fine and everything is happy but when I connect the plug and play, I get the usual computer sounds out of my speaker, but JAWS doesn’t talk, (so I can’t do anything if it doesn’t read to me what is on eht screen). ? Does anyone have any ideas or how to make an external sound card play nice together with the internal one. ? I would be happy to use the internal card for JAWS, and use the USB card to run the plug and play, but I run into the same issue with the USB sound card. ? Thanks, ? Chad |
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Re: weird issue
开云体育It uses the internal one normally ? From: [email protected] <[email protected]> On Behalf Of Butch-tiny puppy via groups.io
Sent: Friday, April 11, 2025 7:58 AM To: [email protected] Subject: Re: [repeater-builder] weird issue ? You probably need to tell jaws what doundcard to use.? ? Butch Bussen ----- Original Message ----- Sent: Friday, April 11, 2025 6:45 AM Subject: [repeater-builder] weird issue ? Hi, ? I hope someone can help me figure out an issue. I am trying to use a West Mountain Radio Rigblaster plug and play sound card interface to run echolink. ? The issue I am running into is that I use JAWS a screenreader that reads text outloud from the computer since I am totally blind. When I have my nomic working JAWS talks fine and everything is happy but when I connect the plug and play, I get the usual computer sounds out of my speaker, but JAWS doesn’t talk, (so I can’t do anything if it doesn’t read to me what is on eht screen). ? Does anyone have any ideas or how to make an external sound card play nice together with the internal one. ? I would be happy to use the internal card for JAWS, and use the USB card to run the plug and play, but I run into the same issue with the USB sound card. ? Thanks, ? Chad |
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Re: weird issue
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----- Original Message -----
Sent: Friday, April 11, 2025 6:45 AM
Subject: [repeater-builder] weird issue Hi, ? I hope someone can help me figure out an issue. I am trying to use a West Mountain Radio Rigblaster plug and play sound card interface to run echolink. ? The issue I am running into is that I use JAWS a screenreader that reads text outloud from the computer since I am totally blind. When I have my nomic working JAWS talks fine and everything is happy but when I connect the plug and play, I get the usual computer sounds out of my speaker, but JAWS doesn’t talk, (so I can’t do anything if it doesn’t read to me what is on eht screen). ? Does anyone have any ideas or how to make an external sound card play nice together with the internal one. ? I would be happy to use the internal card for JAWS, and use the USB card to run the plug and play, but I run into the same issue with the USB sound card. ? Thanks, ? Chad |
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weird issue
开云体育Hi, ? I hope someone can help me figure out an issue. I am trying to use a West Mountain Radio Rigblaster plug and play sound card interface to run echolink. ? The issue I am running into is that I use JAWS a screenreader that reads text outloud from the computer since I am totally blind. When I have my nomic working JAWS talks fine and everything is happy but when I connect the plug and play, I get the usual computer sounds out of my speaker, but JAWS doesn’t talk, (so I can’t do anything if it doesn’t read to me what is on eht screen). ? Does anyone have any ideas or how to make an external sound card play nice together with the internal one. ? I would be happy to use the internal card for JAWS, and use the USB card to run the plug and play, but I run into the same issue with the USB sound card. ? Thanks, ? Chad |
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Tait TB8100 CWID Configuration
I've got a TB8100 in GMRS service.? I want to of course provide proper ID, but as I share the channel with another system, I do not want the ID to beacon, just politely properly ID routinely after use of the system. In the CWID System tab, pretty sure I do not want Automatic CWID checked - but ID after some period of local system use would be done via a Task Manager configuration? Examples, screen shots welcome. |
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Re: In search of dB4060 -005 coupling loops or assemblies
开云体育Is this them?? Duplexer Repair is a service division of?. Duplexer Repair performs repairs, refurbishing, and tuning of a wide variety of duplexers and cavity filters. From small UHF duplexers to large HF cavities. We also offer on-site tuning of duplexers and filters within a reasonable travel distance on a per job basis — call us at?(334) 787-9005?to discuss on-site work, or drop us an email at?service@.... Kory On 2025-04-10 13:41, Gerald Lucha via groups.io wrote:
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In search of dB4060 -005 coupling loops or assemblies
开云体育Kevin has given me a lot of help tuning the overpainted and unknowndB4060 diplexer.? It is smelling a lot like they are not the ham band model.? If anyone has up to date contact info on the firm called duplexerrepair.com I would greatly appreciate it.? If anyone has extra -005 coupling assemblies, please let me know, off list. Jerry W6OJE? gvlucha@... |
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Re: Duplexer for amateur 70-cm band
I agree.? They are false economy.? The only protection that they give the receiver from transmitter power is a very sharp notch.? Burn up the teflon, loose the notch tuning, and you have the chance of the up to 50 watts getting back into your receiver.
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On 4/10/2025 10:38 AM, Harold Farrenkopf via groups.io wrote:
Mobile compact duplexers are for low power use at best. ?They burn up if used for continuous repeater transmission and high power. ?I’ve seen 50 watts burn up the teflon end dielectric tuning screw supports. |
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Re: VHF Duplexer Identification
Regarding the height:? The cans are 8 inches in diameter, and they are 21" tall.? The stated height does not include the tuning rods and other projections.
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Regarding the range: I do not know what frequency range (A, B or C) these were designed for.? They are currently tuned to TX=147.360 and RX=147.960 with the performance stated in my initial post.
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If I wanted to add a can to each channel, will I need to find one pass low / block high and one pass high / block low can?? That is the case with my TXRX duplexers unless I want to change a loop.? I found a few pass low block high cans that seem to be the same as these, but none that are advertised as pass high / block low.
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Thanks!
Jeff |
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Re: Cellwave 526-4-2 harness specs
Butchered and jackass….. ?NO.?
it looks like they had made a 6 cavity preselector using the 6 pass/reject cans in series with notches on both sides of the pass frequency. ?This is one way of making a narrow passband with low loss and large attenuations close in. ?
If these loops were rotatable Q loops like used in the Sinclair Q duplexers, you can do wonders in shape and customization of the pass and reject curves.? |
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Re: Cellwave 526-4-2 harness specs
?Looks like you just need a N type T connector and one length of jumper
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Neal? On Thursday, April 10, 2025, 9:37 AM, Part 15 Engineer via groups.io <kc8gpd@...> wrote:
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Re: Cellwave 526-4-2 harness specs
Thank you, You just saved me a major headache. Robert On Thu, Apr 10, 2025, 7:34?AM Jeff DePolo WN3A via <jd0=[email protected]> wrote:
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Re: Cellwave 526-4-2 harness specs
开云体育
? RG214.? Between cavities – 11.5”.? To antenna tee – 12.0”.? Those are tip-to-tip lengths for 440-470 MHz range. ? ??????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A ? |
KB9LFZ
Jared Smudde