I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
On Friday, December 2, 2022 at 5:14:59 PM UTC-6, [email protected] wrote:https://www.amazon.com/Amphenol-coaxial-Plug-Clamp-sldr/dp/B07PQXKDV6 for a picture.
I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
John,
If you are referring to those cheap-o BNC connectors that you just strip the coax and shove/screw them in place? Usually called "twist on". Yep, those are terrible.
However, I think the type of BNC connectors being referred to here are the ones that have multiple parts that "screw together" after soldering the center pin. Very robust, only needs hand tools to assemble, then can be disassembled and reused. See
The crimp-on type is good too. While you can buy some pricey crimp tools - the good Klein brand isn't too dear. But there are cheaper solutions. See https://www.amazon.com/dp/B09Z4Q2W6S.
- John (OHM)
On 03/12/2022 03:51, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:https://www.amazon.com/Amphenol-coaxial-Plug-Clamp-sldr/dp/B07PQXKDV6 for a picture.
On Friday, December 2, 2022 at 5:14:59 PM UTC-6, [email protected] wrote:
I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
John,
If you are referring to those cheap-o BNC connectors that you just strip the coax and shove/screw them in place? Usually called "twist on". Yep, those are terrible.
However, I think the type of BNC connectors being referred to here are the ones that have multiple parts that "screw together" after soldering the center pin. Very robust, only needs hand tools to assemble, then can be disassembled and reused. See
The crimp-on type is good too. While you can buy some pricey crimp tools - the good Klein brand isn't too dear. But there are cheaper solutions. See https://www.amazon.com/dp/B09Z4Q2W6S.
- John (OHM)
One point to consider is that if moisture is allowed to capillary up
between outer insulation and inner, it will significantly degrade the VSWR.
Clamp connectors will provide an air-tight seal, but this is not always
true of crimp connections.
On crimp BNC/TNC I apply silicone compound as appropriate, and
internally glued heat-shrink to further keep out moisture and add
mechanical strength.
On Saturday, December 3, 2022 at 3:37:43 AM UTC-8, Tim Newport-Peace wrote:https://www.amazon.com/Amphenol-coaxial-Plug-Clamp-sldr/dp/B07PQXKDV6 for a picture.
On 03/12/2022 03:51, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
On Friday, December 2, 2022 at 5:14:59 PM UTC-6, [email protected] wrote: >>>
I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
John,
If you are referring to those cheap-o BNC connectors that you just strip the coax and shove/screw them in place? Usually called "twist on". Yep, those are terrible.
However, I think the type of BNC connectors being referred to here are the ones that have multiple parts that "screw together" after soldering the center pin. Very robust, only needs hand tools to assemble, then can be disassembled and reused. See
No-one said this was the original problem, but it is significant inOne point to consider is that if moisture is allowed to capillary up
The crimp-on type is good too. While you can buy some pricey crimp tools - the good Klein brand isn't too dear. But there are cheaper solutions. See https://www.amazon.com/dp/B09Z4Q2W6S.
- John (OHM)
between outer insulation and inner, it will significantly degrade the VSWR. >>
Clamp connectors will provide an air-tight seal, but this is not always
true of crimp connections.
On crimp BNC/TNC I apply silicone compound as appropriate, and
internally glued heat-shrink to further keep out moisture and add
mechanical strength.
The original post claimed that there was a dead short between the conductor and the shield, not a degradation of the VSWR. If there had been some moisture intrusion I would expect a very minor change in VSWR, if any at all.
Tom
On 05/12/2022 07:27, 2G wrote:https://www.amazon.com/Amphenol-coaxial-Plug-Clamp-sldr/dp/B07PQXKDV6 for a picture.
On Saturday, December 3, 2022 at 3:37:43 AM UTC-8, Tim Newport-Peace wrote:
On 03/12/2022 03:51, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
On Friday, December 2, 2022 at 5:14:59 PM UTC-6, [email protected] wrote:
I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
John,
If you are referring to those cheap-o BNC connectors that you just strip the coax and shove/screw them in place? Usually called "twist on". Yep, those are terrible.
However, I think the type of BNC connectors being referred to here are the ones that have multiple parts that "screw together" after soldering the center pin. Very robust, only needs hand tools to assemble, then can be disassembled and reused. See
One point to consider is that if moisture is allowed to capillary up
The crimp-on type is good too. While you can buy some pricey crimp tools - the good Klein brand isn't too dear. But there are cheaper solutions. See https://www.amazon.com/dp/B09Z4Q2W6S.
- John (OHM)
between outer insulation and inner, it will significantly degrade the VSWR.
Clamp connectors will provide an air-tight seal, but this is not always >> true of crimp connections.
On crimp BNC/TNC I apply silicone compound as appropriate, and
internally glued heat-shrink to further keep out moisture and add
mechanical strength.
The original post claimed that there was a dead short between the conductor and the shield, not a degradation of the VSWR. If there had been some moisture intrusion I would expect a very minor change in VSWR, if any at all.
TomNo-one said this was the original problem, but it is significant in
choice between Clamp and Crimp connectors.
https://www.picwire.com/resources/technical-articles/moisture-coaxial-cable/
On Monday, December 5, 2022 at 2:09:07 AM UTC-8, Tim Newport-Peace wrote:https://www.amazon.com/Amphenol-coaxial-Plug-Clamp-sldr/dp/B07PQXKDV6 for a picture.
On 05/12/2022 07:27, 2G wrote:
On Saturday, December 3, 2022 at 3:37:43 AM UTC-8, Tim Newport-Peace wrote: >>>> On 03/12/2022 03:51, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
On Friday, December 2, 2022 at 5:14:59 PM UTC-6, [email protected] wrote:
I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
John,
If you are referring to those cheap-o BNC connectors that you just strip the coax and shove/screw them in place? Usually called "twist on". Yep, those are terrible.
However, I think the type of BNC connectors being referred to here are the ones that have multiple parts that "screw together" after soldering the center pin. Very robust, only needs hand tools to assemble, then can be disassembled and reused. See
And what was the VSWR?No-one said this was the original problem, but it is significant inOne point to consider is that if moisture is allowed to capillary up
The crimp-on type is good too. While you can buy some pricey crimp tools - the good Klein brand isn't too dear. But there are cheaper solutions. See https://www.amazon.com/dp/B09Z4Q2W6S.
- John (OHM)
between outer insulation and inner, it will significantly degrade the VSWR.
Clamp connectors will provide an air-tight seal, but this is not always >>>> true of crimp connections.
On crimp BNC/TNC I apply silicone compound as appropriate, and
internally glued heat-shrink to further keep out moisture and add
mechanical strength.
The original post claimed that there was a dead short between the conductor and the shield, not a degradation of the VSWR. If there had been some moisture intrusion I would expect a very minor change in VSWR, if any at all.
Tom
choice between Clamp and Crimp connectors.
https://www.picwire.com/resources/technical-articles/moisture-coaxial-cable/
Come on! Do I need to post the quote? I guess so!
"So I put my ohm meter on the connector and found it appeared shorted center pin to barrel with very low resistance (0.1ohm)."
Tom
On 06/12/2022 06:21, 2G wrote:See https://www.amazon.com/Amphenol-coaxial-Plug-Clamp-sldr/dp/B07PQXKDV6 for a picture.
On Monday, December 5, 2022 at 2:09:07 AM UTC-8, Tim Newport-Peace wrote:
On 05/12/2022 07:27, 2G wrote:
On Saturday, December 3, 2022 at 3:37:43 AM UTC-8, Tim Newport-Peace wrote:
On 03/12/2022 03:51, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
On Friday, December 2, 2022 at 5:14:59 PM UTC-6, [email protected] wrote:
I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
John,
If you are referring to those cheap-o BNC connectors that you just strip the coax and shove/screw them in place? Usually called "twist on". Yep, those are terrible.
However, I think the type of BNC connectors being referred to here are the ones that have multiple parts that "screw together" after soldering the center pin. Very robust, only needs hand tools to assemble, then can be disassembled and reused.
No-one said this was the original problem, but it is significant inOne point to consider is that if moisture is allowed to capillary up >>>> between outer insulation and inner, it will significantly degrade the VSWR.
The crimp-on type is good too. While you can buy some pricey crimp tools - the good Klein brand isn't too dear. But there are cheaper solutions. See https://www.amazon.com/dp/B09Z4Q2W6S.
- John (OHM)
Clamp connectors will provide an air-tight seal, but this is not always >>>> true of crimp connections.
On crimp BNC/TNC I apply silicone compound as appropriate, and
internally glued heat-shrink to further keep out moisture and add
mechanical strength.
The original post claimed that there was a dead short between the conductor and the shield, not a degradation of the VSWR. If there had been some moisture intrusion I would expect a very minor change in VSWR, if any at all.
Tom
choice between Clamp and Crimp connectors.
https://www.picwire.com/resources/technical-articles/moisture-coaxial-cable/
Come on! Do I need to post the quote? I guess so!
"So I put my ohm meter on the connector and found it appeared shorted center pin to barrel with very low resistance (0.1ohm)."
TomAnd what was the VSWR?
A DC short is meaningless in an antenna.
On Tuesday, December 6, 2022 at 2:11:15 AM UTC-8, Tim Newport-Peace wrote:See https://www.amazon.com/Amphenol-coaxial-Plug-Clamp-sldr/dp/B07PQXKDV6 for a picture.
On 06/12/2022 06:21, 2G wrote:
On Monday, December 5, 2022 at 2:09:07 AM UTC-8, Tim Newport-Peace wrote:
On 05/12/2022 07:27, 2G wrote:
On Saturday, December 3, 2022 at 3:37:43 AM UTC-8, Tim Newport-Peace wrote:
On 03/12/2022 03:51, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
On Friday, December 2, 2022 at 5:14:59 PM UTC-6, [email protected] wrote:
I hate screw on coax connectors. Nothing beats a proper crimp (especially the crimp in your wallet for the proper crimp tools and dies).
John,
If you are referring to those cheap-o BNC connectors that you just strip the coax and shove/screw them in place? Usually called "twist on". Yep, those are terrible.
However, I think the type of BNC connectors being referred to here are the ones that have multiple parts that "screw together" after soldering the center pin. Very robust, only needs hand tools to assemble, then can be disassembled and reused.
No-one said this was the original problem, but it is significant inOne point to consider is that if moisture is allowed to capillary up >>>> between outer insulation and inner, it will significantly degrade the VSWR.
The crimp-on type is good too. While you can buy some pricey crimp tools - the good Klein brand isn't too dear. But there are cheaper solutions. See https://www.amazon.com/dp/B09Z4Q2W6S.
- John (OHM)
Clamp connectors will provide an air-tight seal, but this is not always
true of crimp connections.
On crimp BNC/TNC I apply silicone compound as appropriate, and
internally glued heat-shrink to further keep out moisture and add >>>> mechanical strength.
The original post claimed that there was a dead short between the conductor and the shield, not a degradation of the VSWR. If there had been some moisture intrusion I would expect a very minor change in VSWR, if any at all.
Tom
choice between Clamp and Crimp connectors.
https://www.picwire.com/resources/technical-articles/moisture-coaxial-cable/
Come on! Do I need to post the quote? I guess so!
"So I put my ohm meter on the connector and found it appeared shorted center pin to barrel with very low resistance (0.1ohm)."
TomAnd what was the VSWR?
A DC short is meaningless in an antenna.Not so for a 1/4 wavelength antenna, which is what a transponder monopole is. The 1/4 wavelength is 6.8 cm (2.7 in) at 1100 MHz. You would short a 1/2 wavelength antenna where the standing wave would be at zero at the end of the antenna.
Tom
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