Home |
Search |
Today's Posts |
#1
|
|||
|
|||
Telescopic to coax adaptor?
Is there a recognised way to connect a radio that just has a
telescopic aerial to a coax cable so that an external aerial can be used? If not, has anyone got any 'Heath Robinson' ideas? Thanks |
#2
|
|||
|
|||
Is there a recognised way to connect a radio that just has a telescopic aerial
to a coax cable so that an external aerial can be used? Sure, just connect a short jumper from the center conductor of the coax to the telescopic antenna. What is a 'Heath Robinson' idea? Is that something desirable? 73 Gary N4AST |
#3
|
|||
|
|||
|
#4
|
|||
|
|||
|
#5
|
|||
|
|||
Dave Piggin wrote:
What is a 'Heath Robinson' idea? Is that something desirable? Gary Typicaly a British bit of vocabalry, meaning "Any other answer or thing I could do to make it work" in it's simplist term. Dave d;-) William Heath Robinson (1872-1944) was the first to see the humour in drawing fantastically complicated machines. The closest translation into US English is "Rube Goldberg". -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
#6
|
|||
|
|||
Ian White, G3SEK wrote:
Dave Piggin wrote: What is a 'Heath Robinson' idea? Is that something desirable? Gary Typicaly a British bit of vocabalry, meaning "Any other answer or thing I could do to make it work" in it's simplist term. Dave d;-) William Heath Robinson (1872-1944) was the first to see the humour in drawing fantastically complicated machines. The closest translation into US English is "Rube Goldberg". Didn't he write "The Adventures of Uncle Lubin?" (My favorite children's book.) 73, Tom Donaly, KA6RUH |
#7
|
|||
|
|||
"Mike Spence" wrote Is there a recognised way to connect a radio that just has a telescopic aerial to a coax cable so that an external aerial can be used? Mike, a receiver that does not provide for external antenna connection, will probably not benefit from forcing the input of one. The front end design of many portables uses double-conversion only, this allows for reception of fairly weak signals from the provided whip antenna. But it does not always bode well when powerful inputs such as an external antenna can provide, overloading the little portables and making it more difficult to discern between stations close to each other. Recommend you use your portable for what it was intended for, and look into adding a tabletop receiver if you want to input external antenna feed. Best regards, Jack Painter Virginia Beach VA |
#8
|
|||
|
|||
"Jack Painter" wrote in message news:Zuuid.1$uT4.0@lakeread03...
Mike, a receiver that does not provide for external antenna connection, will probably not benefit from forcing the input of one. The front end design of many portables uses double-conversion only, this allows for reception of fairly weak signals from the provided whip antenna. But it does not always bode well when powerful inputs such as an external antenna can provide, overloading the little portables and making it more difficult to discern between stations close to each other. Recommend you use your portable for what it was intended for, and look into adding a tabletop receiver if you want to input external antenna feed. Best regards, Jack Painter Virginia Beach VA Thanks for that Jack, I see your point. The receiver in question is a Sony XDR-S1 DAB and I'm in a marginal reception area. Before I spent out on DAB I tried one (not the Sony) and the reception was reasonable, the Sony isn't as good though and I just thought that maybe I could help it a bit with an external aerial. Thanks for your thoughts, Mike |
#9
|
|||
|
|||
"Mike Spence" wrote in message om... "Jack Painter" wrote in message news:Zuuid.1$uT4.0@lakeread03... Mike, a receiver that does not provide for external antenna connection, will probably not benefit from forcing the input of one. The front end design of many portables uses double-conversion only, this allows for reception of fairly weak signals from the provided whip antenna. But it does not always bode well when powerful inputs such as an external antenna can provide, overloading the little portables and making it more difficult to discern between stations close to each other. Recommend you use your portable for what it was intended for, and look into adding a tabletop receiver if you want to input external antenna feed. Best regards, Jack Painter Virginia Beach VA Thanks for that Jack, I see your point. The receiver in question is a Sony XDR-S1 DAB and I'm in a marginal reception area. Before I spent out on DAB I tried one (not the Sony) and the reception was reasonable, the Sony isn't as good though and I just thought that maybe I could help it a bit with an external aerial. Thanks for your thoughts, Mike Rig up a random length insulated wire temporary antenna outside to a tree or something. Bring the end to your receiver and wind it around the outside of the radio case a few times and temporarily connect the free end to something grounded such as the ground pin of a duplex outlet; be careful! This may give you some capacitive and inductive coupling especially if your radio has a ferrite rod antenna. It may, on some bands, give an improvement. Experiment a bit. Have even wound the telephone cord around a portable. Also connected capacitively from the whip of a DX394 to a plastic covered metal clothes line and right now I've got a lead from the receiver whip clipped to a six foot metal bedroom curtain rod! It even improved very weak reception here from European Long Wave stations on 152 to 198 kilohertz. Yup that's around a wavelength of 1500 metres! Also if you've got a phone with any metal in it (most phones nowadays are plastic!) clip a lead from your whip to that. Try anything that might work and is safe. Have fun. Terry. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
The "TRICK" to TV 'type' Coax Cable [Shielded] SWL Loop Antennas {RHF} | Antenna | |||
Dead Serious T2FD: HV Insulation, EMP Arrestors, extra Coax Choke? | Antenna | |||
Coax choke, losses and ferrite | Antenna | |||
Poor quality low + High TV channels? How much dB in Preamp? | Antenna |