Topband: FW: Re: amp tripping on 160

[Jamie WW3S]

someone mentioned arc/flash over......and that may be a problem....I am 
using a different standoff on this tower than previously......using a 4' 
fiberglass mast section......is the military surplus green fiberglass 
mast conductive at RF? It secured to the tower with deltec cable straps 
and has a stainless pulley at the end with the rope to pull the antenna 
up and down.....

------ Original Message ------
From: "FZ Bruce" <k1fz at twc.com>
To: "'topband at contesting.com'" <topband at contesting.com>
Sent: 10/29/2021 11:32:27 AM
Subject: Re: Topband: FW: Re: amp tripping on 160

>
>
>	To: "WW3S" Cc:
>  Sent: Friday October 29 2021 11:16:58AM
>  Subject: Re: Topband: amp tripping on 160
>
>  The "L" needs grounds to be efficient when near the earth. Try some
>radials to the coax shield connection at the "L" antenna end. Signal
>should come up, as stray RF comes down.
>  73 Bruce-K1FZ
>
>	----------------------------------------- From: "WW3S"
>  To: "FZ Bruce"
>  Cc: topband at contesting.com
>  Sent: Friday October 29 2021 11:05:55AM
>  Subject: Re: Topband: amp tripping on 160
>
>  I have toroids on all the cables….and even started pulling cables
>out of the shack to see if it made a difference….im beginning to
>wonder if the amp has a fault….
>
>  Sent from my iPad
>
>  > On Oct 29, 2021, at 10:57 AM, FZ Bruce  wrote:
>  >
>  > It is likely RF traveling into the amp via multiple wires,
>cables. Recommend you put RFI cores on the coax between the radio and
>amp, and on the antenna coax near the amp.
>  >
>  > ( also possible getting on power supply connections)
>  >
>  > 73
>  > Bruce-K1FZ
>  >
>  > -----------------------------------------
>  >
>  > From: "WW3S"
>  > To: "topband at contesting.com"
>  > Cc:
>  > Sent: Friday October 29 2021 10:44:39AM
>  > Subject: Topband: amp tripping on 160
>  >
>  > After two great nights of being able to receive, I am beyond
>frustrated,
>  > as I cannot transmit....something happened recently, and I cannot
>figure
>  > it out... I suspect its RFI, but not sure why.....as soon as I
>transmit
>  > on my Inverted L, my SPE 1.3KFA amp trips, saying SWRT exceeds
>  > limits.....yet the SWR displayed is 1.46 to 1....new to me, but
>not
>  > new to this season is my tower which holds my Inverted L.....it was
>50'
>  > of Rohn 25, with a Hazer, its now a Alumnatower 48', with a
>  > wonderpole.......but.....that setup did work, as I worked S9OK and
>  > 3DA0RU with it....I added a second receiving loop in the front
>yard, so
>  > thought that was it, but I took those cables out from the shack and
>  > still have a problem....yesterday morning, I found the short piece
>of
>  > coax had a nick in it, from the mower I guess, so replaced it, and
>  > shortened my L a bit to bring the SWR a bit further up the
>band.....I
>  > tested yesterday morning and it was great, low , mid and high
>power,
>  > even 1300 watts of RTTY, no failure, I tried several times during
>the
>  > day and all was great until darkness, and as soon as I keyed the
>amp,
>  > failure....I pulled out what little I have left of my hair trying
>to
>  > figure this out......the wonderpole is grounded and I "assume" the
>tower
>  > is grounded thru that......should I separately ground the tower?
>Doing
>  > so will complicate tilting it over, plus I only have copper
>grounding
>  > attachments, I thought I read where I shouldn't use dissimilar
>  > metals.....but willing to try anything to get my 160 TX ability
>  > back...thoughts?
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