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#11
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SEA-235 SSB Tuner Problem
The antenna is a 23 foot Shakespeare whip. I´ve checked the
connections to it and they appear to be good. I´ve been told that my signal sounds good although I can only transmit at low power. I would have thought that at some frequency that the antenna would be tuned. -- Geoff Freebee wrote in message . .. you didn't say what the antenna is - assuming sailboat backstay - maybe check the condition of the HT wire from the tuner to the backstay? On 3 Jan 2004 11:25:06 -0800, (GeoffSchultz) wrote: I just got down to my boat on the Rio Dulce in Guatemala and found that my SEA-235 SSB tuner isn't tuning. The tuner should automatically tune |
#12
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SEA-235 SSB Tuner Problem
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#13
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SEA-235 SSB Tuner Problem
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#15
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SEA-235 SSB Tuner Problem
Lessee: 23 feet, say 7 meters is a quarter wave
so a wavelength is 28 meters. 300/28 = 10.7 MHz or a little lower.... The wire in a glass whip can break. Checking it for resonance would eliminate this possibility. Brian W On 4 Jan 2004 05:28:37 -0800, (GeoffSchultz) wrote: The antenna is a 23 foot Shakespeare whip. I´ve checked the connections to it and they appear to be good. I´ve been told that my signal sounds good although I can only transmit at low power. I would have thought that at some frequency that the antenna would be tuned. -- Geoff Freebee wrote in message . .. you didn't say what the antenna is - assuming sailboat backstay - maybe check the condition of the HT wire from the tuner to the backstay? On 3 Jan 2004 11:25:06 -0800, (GeoffSchultz) wrote: I just got down to my boat on the Rio Dulce in Guatemala and found that my SEA-235 SSB tuner isn't tuning. The tuner should automatically tune |
#16
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SEA-235 SSB Tuner Problem
I'm happy to report that I resolved the problem. Thanks for all of
the suggestions. This morning I wired a 50' extension cord as an antenna and pulled it via a halyard up the mast. The tuner wouldn't tune, but I noted that I wasn't receiving any WWV frequencies. I switched back to the whip antenna and I still wasn't getting anything. I decided to start checking all of the connections and while I was checking the PLU-59 connection at the transmitter, WWV started to come in. I played with the connector and decided to replace it. After replacing the connector I tried tuning and got great tunes (SWRs between 1.0 and 1.2) and great reception. I'm still very confused as how I could transmit voice and e-mail over this, but I guess that there was just enough of a connection, but insufficient for the tuner to tune. I learned a lot and really want to thank everyone who helped! -- Geoff Shortwave Sportfishing wrote in message . .. On 3 Jan 2004 11:25:06 -0800, (GeoffSchultz) wrote: ~~ snip ~~ What I'd like to know is what other tests can I run to diagnose the problem. Could it be the antennae? Any suggestions would be greatly appreciated. Just remember that I'm in the middle of nowhere. Thanks, Geoff I'm not familiar with that radio, but have you checked the connector at the radio and at the antenna? Loose ground perhaps? Later, Tom S. Woodstock, CT ---------- "I object to fishing tournaments less for what they do to fish than what they do to fishermen." Ted Williams - 1964 |
#17
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SEA-235 SSB Tuner Problem
I'm happy to report that I resolved the problem. Thanks for all of
the suggestions. This morning I wired a 50' extension cord as an antenna and pulled it via a halyard up the mast. The tuner wouldn't tune, but I noted that I wasn't receiving any WWV frequencies. I switched back to the whip antenna and I still wasn't getting anything. I decided to start checking all of the connections and while I was checking the PLU-59 connection at the transmitter, WWV started to come in. I played with the connector and decided to replace it. After replacing the connector I tried tuning and got great tunes (SWRs between 1.0 and 1.2) and great reception. I'm still very confused as how I could transmit voice and e-mail over this, but I guess that there was just enough of a connection, but insufficient for the tuner to tune. I learned a lot and really want to thank everyone who helped! -- Geoff Shortwave Sportfishing wrote in message . .. On 3 Jan 2004 11:25:06 -0800, (GeoffSchultz) wrote: ~~ snip ~~ What I'd like to know is what other tests can I run to diagnose the problem. Could it be the antennae? Any suggestions would be greatly appreciated. Just remember that I'm in the middle of nowhere. Thanks, Geoff I'm not familiar with that radio, but have you checked the connector at the radio and at the antenna? Loose ground perhaps? Later, Tom S. Woodstock, CT ---------- "I object to fishing tournaments less for what they do to fish than what they do to fishermen." Ted Williams - 1964 |
#18
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SEA-235 SSB Tuner Problem
On Sun, 04 Jan 2004 22:34:19 GMT, Brian Whatcott
wrote: Lessee: 23 feet, say 7 meters is a quarter wave so a wavelength is 28 meters. 300/28 = 10.7 MHz or a little lower.... The wire in a glass whip can break. Checking it for resonance would eliminate this possibility. Brian W The wire in the whip isn't a straight piece of wire. It's coiled around a form to form a continuously-loaded shortened whip. The electrical length of it is considerably longer than 23'. It'll resonate lower than 10 Mhz somewhere...... |
#19
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SEA-235 SSB Tuner Problem
On Sun, 04 Jan 2004 22:34:19 GMT, Brian Whatcott
wrote: Lessee: 23 feet, say 7 meters is a quarter wave so a wavelength is 28 meters. 300/28 = 10.7 MHz or a little lower.... The wire in a glass whip can break. Checking it for resonance would eliminate this possibility. Brian W The wire in the whip isn't a straight piece of wire. It's coiled around a form to form a continuously-loaded shortened whip. The electrical length of it is considerably longer than 23'. It'll resonate lower than 10 Mhz somewhere...... |
#20
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SEA-235 SSB Tuner Problem
Glad you solved it, Geoff! Yeah, it's always acceptable to move the
transmitter up a little closer to the coax connectors....(c; Any SWR under 2:1 is fine. 1.5:1 is only 4% reflected power. 2.0:1 is only 10% reflected power. That's just fine.....except on CB, of course. We also don't like these SWR readings at high powered broadcast stations. 10% of 150 kilowatts makes a LOT of heat and some amazing standing wave voltages. 10% of 150W is more manageable. On 5 Jan 2004 12:00:48 -0800, (GeoffSchultz) wrote: I'm happy to report that I resolved the problem. Thanks for all of the suggestions. This morning I wired a 50' extension cord as an antenna and pulled it via a halyard up the mast. The tuner wouldn't tune, but I noted that I wasn't receiving any WWV frequencies. I switched back to the whip antenna and I still wasn't getting anything. I decided to start checking all of the connections and while I was checking the PLU-59 connection at the transmitter, WWV started to come in. I played with the connector and decided to replace it. After replacing the connector I tried tuning and got great tunes (SWRs between 1.0 and 1.2) and great reception. I'm still very confused as how I could transmit voice and e-mail over this, but I guess that there was just enough of a connection, but insufficient for the tuner to tune. I learned a lot and really want to thank everyone who helped! -- Geoff Shortwave Sportfishing wrote in message . .. On 3 Jan 2004 11:25:06 -0800, (GeoffSchultz) wrote: ~~ snip ~~ What I'd like to know is what other tests can I run to diagnose the problem. Could it be the antennae? Any suggestions would be greatly appreciated. Just remember that I'm in the middle of nowhere. Thanks, Geoff I'm not familiar with that radio, but have you checked the connector at the radio and at the antenna? Loose ground perhaps? Later, Tom S. Woodstock, CT ---------- "I object to fishing tournaments less for what they do to fish than what they do to fishermen." Ted Williams - 1964 |
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