[Yaesu] HI SWR problem - Mark V

[James Hall]

Bob:

Thank you so much for your reply !  Almost routinely, I disconnect the 
antennae coax from all rigs when thunderstorm activity is anticipated.  
I say almost because sometimes I rush off to work and forget to do so.  
Today, we have had rain shower activity but no noticable electrical 
(lightning) activity.  All grounding is routed through a single point 
ground system with Polyphaser lightning arrestors.  The amplifier 
presently is a Kenwood TL922 - which is about to be replaced by a Alpha 
870 - should be here next week.

Here is more info:  I have the Mark V and the -847 connected via a A/B 
crossover switch to the two antenna systems.  Those are Force 12 beams 
on a 72' tower and a R-7000 vertical (designed for SO2R operation).  
The crossover switch is built with 2 Top Ten Devices A/B switches per 
their application notes - basically a DPDT switch.  The antennas on the 
tower are switched using a RatPack remote coax switch - soon to be 
controlled via Alpha's (Crosslink) DAS.

See any problems with this setup or potential problems ??

James C. Hall
WB4YDL


On Thursday, September 26, 2002, at 08:57 PM, KC3VO@aol.com wrote:

> If the problem is coming down the coax, it would most likely occur 
> when there
> is storm activity in your area, from wind or lightning induced static
> charges.  --Charges of this nature may also damage your Fluke meter, 
> if it is
> connected when they occur.---You did not give info as to what type 
> antenna,
> whether or not there was storm activity, or any number of other things 
> that
> might affect your radio.--Older, non-solid state radios, and solid 
> state
> radios with relay switching instead of diodes, are more forgiving of 
> static
> charges and/or SWR spikes. If you drive an amplifier that DOES NOT 
> have a
> tuned or matched input, it may cause problems, as can an antenna that
> contacts trees or other objects that may result in arcing during
> transmit.-------------Good luck&73--KC3VO---Bob
>