Rob Atkinson wrote:
> I'm happy for you that you can afford at least $500 for a pair of computer
> PC speakers but I think I'll handle the RF noise by turning my $10 hamfest
> speakers off when I'm on the air and save around a thousand bucks.
I don't go quite that cheap, but with a pair of active speakers on three
of the computers in the house, Two computers are with in 4' of my
station including the not gold plated, old, used Alpha 76 and manual MFJ
989C tuner. There are two more computers in the shop with one being on
the gigabit network tied to the ones in the house. The second one is
stand alone. That computer in the shop also has a TV tuner, FM radio,
and ties to a Satellite receiver sitting "on top" of my old HT33B
Hallicrafters amp and right beside an Icom 7000, 100 watt 1.8 through
440 rig driving a Tokyo Hy-Power HL-1.5Kfx. The audio out, runs about
20' to my stereo receiver with about 30' leads to each of the speakers.
The CAT5e and the 2 RG-6 runs, run within a few feet of the coax from
the house to the tower and the shop to the tower. Actually there are 3
runs of RG-6 to the house that run IN the conduit with the LMR-600 and
600. One only goes up the tower 20 feet to the satellite receiver while
the other two make it all the way to the top along with the feeds to the
Tri-bander, 7L C3i on 50 MHz, and the 144 and 440 arrays. I run the
legal limit on 1.8 through 28 MHz from the house , 1 KW PEP and CW 1.8
- 144 from the shop. (Henry 2002A on 144). BTW the TV antennas are at
roughly 90 feet (both with remote pre-amps) with 2-meter antennas at 40'
(top of which is 60') and a stacked pair of vertically polarized 12L
144's at 130 ' (soon to be 120') I also have another TV antenna on the
West end of the shop.
I do not have any noticeable interference to any TV, house or shop (off
the air, satellite, or cable), I do not get into any of the
"inexpensive" active speaker systems including the stereo in the shop,
nor do I hear a peep out of the computers or network. BTW , the modem,
router, and 5 port switch are within 2-3 feet of the station in the house.
I would add I have one whale of a ground system with single point ground
near as I can. The point of contention being the house and shop are on
different electrical feeds but are tied into the overall ground system.
That and the two computers in the ham shack which tie to the station
via serial and audio cables are on a different circuit than the station.
The only problem I've had would be a pin 1 problem on the 756 Pro.
There is so much AC floating around in here I used to be able to key the
rig to full output by picking up the mike. It was not RF feedback, but
60 cycle pick up. Merely reaching up and placing a hand on the metal
mike connector on the rig or the metal on the Alpha would stop the 60
cycle pickup. The confusing part was the problem was intermittent. I
fixed it permanently by tying the mike cord shield to actual ground.
Unfortunately I lost a number of functions in the mike, but fortunately
I never used those functions from the mike anyway. <:-))
So, cheap speakers aside, a lot depends on the layout, cable routing,
and grounding system.
> I guess with gold plated Alphas, $13,000 transceivers, $1200 watt meters,
> $500 keyer paddles nothing should surprise me anymore.
Hey, I like CW and one of those gold keyers is about my only real
indulgence to vanity<:-)) Besides, it was only between $20 and $30 more
than the chrome based one. (and it's easy to clean)
> rob / k5uj
>>> I use Studio Quality Active Monitors from Genelec... RF proof, Aluminum
>>> Enclosure, self contained with amplifiers. NOTHING gets into them!
>>> Vy 73, Cliff - W4NJ - From near The House of The Mouse - Disneyworld,
> Amps mailing list
Amps mailing list