Hi
SPE using a smal coax RG58 as capacitor in the RF detection / SWR system
I seen this melted!!! This made SWR trip & go bananas….
Open the amp and check it
Just my two cent…..
Best Regards,
Stein-Roar Brobakken
s...@lb3re.com
LB3RE LC0X K3RAG
Skype: lb3re.rag
> 30. okt. 2021 kl. 02:42
It doesn't need much swr increase to trip, A rise to 1.7:1 will do it
despite that swr fine for use.
You did not comment on the SPE indicated swr. Can you see it rise just
before it trips with gradual drive increase ?
vk4tux
On 30/10/21 10:59, WW3S wrote:
yep,, did thatdoesnt trip until
yep,, did thatdoesnt trip until somewhere between 300 and 400
watts.and the alarm is instant.I suspect what is happening,
based on my sons observation, and his recording the soundis RF is
telling the relays on the switch to switch, and the 160 probably goes
openI inserted a
Sounds like you are still unsure, and that is a guess. You said the swr
is 1.4:1 , I guess this what the SPE shows with SPE in standby, and txcr
keyed ?
If so when switched to operate, you should be able to gradually increase
drive power form a very low level and raise until you see the
With the help of #1 son, during a lull in the monsoons, we isolated it to my
KK1L 2x6 box, mounted on the outside of the house. Sounds like maybe some
relays clicking and clacking, probably rfi coming thru the control cables,
despite clamp on toroids everywhere and the cables wrapped numerous
The amp is doing its job, and the swr trip threshold is 1.6:1. It is
best to set the SPE atu toi bypass if used, and use an external
eg; Palstar manual tuner to tune the SPE display 1.10:1 or better on
standby TX and in operate, adj the Tuner input/output capacitors for
best under power,
Try doing a refresh of the page. Looks okay here.
Tree
On Fri, Oct 29, 2021 at 10:22 AM David Olean wrote:
> It looks like the Summer Stew scores duplicated. (?) OOPS!
>
> Dave K1WHS
>
> On 10/29/2021 11:37 AM, Tree wrote:
> > Sorry for the delay with this - but the preliminary scores for the
Just had a sudden isssue of my ACOM 1000 tripping due to high swr. It
had been fine, then began an intermittent, come and go problem.
I checked the feed point for my 160 and 80m wires at the base of a 45'
tall walnut tree. Cut out some wire and replaced it. Disconnected the
current balun.
I'm afraid that I as soon as I saw the email header I guessed there would be
mention of an Expert amp. If you have the opportunity to borrow a more
reliable amp and try that, I would be interested in your results, please.
73, Ian G4iiY
-Original Message-
From: Topband
It looks like the Summer Stew scores duplicated. (?) OOPS!
Dave K1WHS
On 10/29/2021 11:37 AM, Tree wrote:
Sorry for the delay with this - but the preliminary scores for the recent
Stew Perry are now posted.
www.kkn.net/stew
73 Tree N6TR
_
Searchable Archives:
someone mentioned arc/flash over..and that may be a problemI 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
Sorry for the delay with this - but the preliminary scores for the recent
Stew Perry are now posted.
www.kkn.net/stew
73 Tree N6TR
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
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
My old friend N8PR(SK) had a similar problem. Peter QTH was few miles for a AM
station. The SPE amp is very sensitive, the signal from the AM station was
strong enough to trip the amp. The solution was a 2 KW high pass filter to
attenuate 30 db the signal from the AM station. Keep attenuation
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,
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)
73Bruce-K1FZ
-From:
If everything is fine at lower power but trips at higher power, it could be
RFI. But I would suspect an arcover somewhere.
It sounds like your feedpoint is low impedance but there can be arcovers on
the insulator at the end of your L, too. Or if your L is spaced off from
the tower with
After two great nights of being able to receive, I am beyond frustrated,
as I cannot transmitsomething 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
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