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#1
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Odd Piece of Coaxial Cable
I recently handled an estate sale. Among the SK's posessions was a one-foot
piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Some audio cables are made up with discontinuous shields for elimination of ground loops but I've not seen it done for RF. Ideas? |
#2
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Odd Piece of Coaxial Cable
Sal M. Onella wrote:
I recently handled an estate sale. Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Some audio cables are made up with discontinuous shields for elimination of ground loops but I've not seen it done for RF. Ideas? A shielded loop. -- Jim Pennino Remove .spam.sux to reply. |
#3
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Odd Piece of Coaxial Cable
wrote in message ... Sal M. Onella wrote: I recently handled an estate sale. Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. A shielded loop. Thanks. Good chance that was it. |
#4
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Odd Piece of Coaxial Cable
Take all of the sheath and the shield off and a piece like that could be
used in the making of a gamma match. Partially stripped it could have been for a piece of test equipment or ??? "Sal M. Onella" wrote in message ... I recently handled an estate sale. Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Some audio cables are made up with discontinuous shields for elimination of ground loops but I've not seen it done for RF. Ideas? |
#5
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Odd Piece of Coaxial Cable
Sal M. Onella wrote:
Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Ideas? It's probably a poor-man's slotted line. A needle is inserted through the center insulation to access the voltage on the center conductor. -- 73, Cecil http://www.w5dxp.com |
#6
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Odd Piece of Coaxial Cable
Then again, depending on how 'devious' he was, it could have been that
he wanted to leave something that would make people wonder. - 'Doc |
#7
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Odd Piece of Coaxial Cable
Cecil Moore wrote:
Sal M. Onella wrote: Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Ideas? It's probably a poor-man's slotted line. A needle is inserted through the center insulation to access the voltage on the center conductor. Sorry, I misunderstood the description. It is probably part of a loop antenna. -- 73, Cecil http://www.w5dxp.com |
#8
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Odd Piece of Coaxial Cable
Maybe he was starting to strip the outter sheath and shield to make a gamma
match. Or it could be a test gadget he was going to make.....Rollie "Sal M. Onella" wrote in message ... I recently handled an estate sale. Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Some audio cables are made up with discontinuous shields for elimination of ground loops but I've not seen it done for RF. Ideas? |
#9
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Odd Piece of Coaxial Cable
Cecil Moore wrote:
Cecil Moore wrote: Sal M. Onella wrote: Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Ideas? It's probably a poor-man's slotted line. A needle is inserted through the center insulation to access the voltage on the center conductor. Sorry, I misunderstood the description. It is probably part of a loop antenna. What is needed, here, is a Ouija board. 73, Tom Donaly, KA6RUH |
#10
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Odd Piece of Coaxial Cable
Sal M. Onella wrote:
I recently handled an estate sale. Among the SK's posessions was a one-foot piece of RG-8 or RG-213 which he had carefully modified by cutting away about 3/16 inch of the jacket and braid all around the circumference of the cable, near its middle. I am not sure what use this would be to a ham. Some audio cables are made up with discontinuous shields for elimination of ground loops but I've not seen it done for RF. Ideas? All the above have merit-- One other use- in SOME installations, there is a requirement to do D.C. isolation - Removal ot part of the sheath, jumpered by a Capacitor (but if that is what this for, the cap would be in place). And, as to the first comment, such a loop would have been used as a direction Finder (the space between the broken shields was the "sense area of the loop, and, if remember right, you "Null" in the direction that the "loop" is perpendicular to. - Jim NN7K |
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