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eHam Forums => Station Building => Topic started by: KE4AIF on January 21, 2009, 11:59:14 PM



Title: Jumper Cables
Post by: KE4AIF on January 21, 2009, 11:59:14 PM
Kenwood TS-690 into a AL-1500. Have a 3 foot jumper and can not get SWR under 2:1 at 1880KHZ. Does not seem to matter on other bands. Some tell me a longer jumper might help but how long? I come out of amp with 3 foot to my tuner and coax switch. Any ideas on jumpers and how long between components. Antenna is a full size inverted V dipole with wireman 160 meter 1:1 balun and coax fed to shack.
Thanks KE4AIF


Title: Jumper Cables
Post by: W5GA on January 22, 2009, 08:38:27 AM
Have you tried using a different jumper just to see what it does?


Title: Jumper Cables
Post by: W3ML on January 22, 2009, 05:39:31 PM
Have you thought of taking the coax switch out of line. If you only have the one antenna then there is no need for it.

John


Title: Jumper Cables
Post by: WW5AA on January 23, 2009, 08:00:34 AM
The problem is most likely the Balun...Try it with out the balun, just using a coaxial choke.

73 de Lindy


Title: Jumper Cables
Post by: K8AC on January 27, 2009, 06:31:09 AM
The SWR as measured where?  Are you talking about the SWR as seen by the 690 looking into the 1500?  If so, the antenna on the output of the amp has nothing whatever to do with what you see there.  If not, then the cable between the 690 and the 1500 has nothing to do with the SWR seen by the amplifier.