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Message |
    
Knowledge
Junior Member
Username: Knowledge
Post Number: 14
Registered: 4-2006
| | Posted on Tuesday, May 23, 2006 - 3:26 pm: | 
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-Setup-
Midland 77-285
KL500
Yaesu YS-60
Wilson 1K
-Issue-
The Radio and Meter are grounded, the KL500 isn't grounded other than the 8" ground to the circuit. When the Meter is grounded, my SWRs go a slight bit higher but equal around the band. When I unground it and try to calibrate it, it reacts to me moving closer to it or holding the knob, also, it plummets on Ch. 1 and goes up on Ch. 40.
-Questions-
What do you guys make of this? Should I leave the Meter grounded? What's the more accurate reading in SWRs? |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1677
Registered: 9-2004
| | Posted on Tuesday, May 23, 2006 - 7:24 pm: |
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you should try this meter in another installation, (maybe at the home base) and see if it acts the same.
or try a different meter in the car, and see if it does the same thing.
thats the only way to KNOW whether its the meter's fault or not.
matt
also, never, ever, ever, assume that its not your jumpers because they "look" fine, or "used to work fine".
always have enough jumpers on hand to swap out a suspect.
didnt we already figure out that it was a bad connector on the antenna coax?
or was that someone else?
matt |
Knowledge
Junior Member
Username: Knowledge
Post Number: 15
Registered: 4-2006
| | Posted on Tuesday, May 23, 2006 - 9:58 pm: |
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That was me, but it was the ground issue. Once I grounded the Meter and Radio, the issue with it staying keyed up went away, but the SWRs went a bit higher. |
Tech808
Moderator
Username: Tech808
Post Number: 10084
Registered: 8-2002
| | Posted on Wednesday, May 24, 2006 - 6:49 pm: |
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Knowledge,
All Antenna's, Radio's, Meter's, Amp's and ALL Equipment that is inline between your radio and antenna should all be grounded to a SINGLE POINT to get accurate result's.
Hope this help's,
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Dale
Intermediate Member
Username: Dale
Post Number: 419
Registered: 12-2002
| | Posted on Thursday, May 25, 2006 - 10:44 am: |
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i agree with lon on grounding.also agree with having different jumpers should be different lenths 3,6,9,12,ect.now 1 thing id do maybe ya already done it is check swrs with just radio,antenna,swr meter see were your at if no adjusting is needed then add amp see where your at.ya dont want swrs any higher than 1.3 when checking it with just radio,antenna,meter.hope this helps |
Therealporkchop
Advanced Member
Username: Therealporkchop
Post Number: 752
Registered: 11-2002
| | Posted on Thursday, May 25, 2006 - 3:30 pm: |
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I thought that one time Mr. DoubleZero there told me not to ground everything together that it would cause 'loops'.
Was Pat tore-back again? |
Tech833
Moderator
Username: Tech833
Post Number: 1364
Registered: 8-2002
| | Posted on Thursday, May 25, 2006 - 9:43 pm: |
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I just read this original post.
When this happens it means there is a ground differential between some pieces of equipment. I would make DANG sure the coax ground is soldered on both ends of your jumpers. Crimp type connectors are simply not good enough. Your coax shields need to be soldered at each end. Cold solder joints are also a cause of this, so when you install your own PL-259's, be sure and scrape away the chrome plating around the little solder holes so you're soldering right to the brass the connector is made of. |
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