Last year my neighbor bought a new Lennox "Green" A/C. That simply means
the fan on the outside unit is variable speed. The local Lennox shop
replaced the DC unit with one that was supposed to fix the problem.
Didn't. He claims the whole unit is run on DC now. Ongoing issue.
Horrible noise on several bands. Check out the video of what it's like
every 20KHx on 20m. Paste this into your browser...
https://flic.kr/p/XV2QhX
John/AC4CA
On 1/16/2018 6:23 AM, N2TK, Tony wrote:
Just learned of something new to me - soft start for air conditioners. As I
will be replacing both air handlers and compressors this year and I have a
whole house backup NG generator, you have tweaked my interest. Where do I find
more info on them?
On a side note I heard mention that variable speed air handler blowers can
cause hash compared to quiet fixed speed blowers. Any truth to that.
Tnx for any feedback
N2TK, Tony
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Kim
Elmore
Sent: Monday, January 15, 2018 9:29 PM
To: k3lr@k3lr.com
Cc: towertalk@contesting.com; john@kk9a.com
Subject: Re: [TowerTalk] Kohler home generator hash?
Hi Tim,
I’m a bit surprised they aren’t offered as a standard add-on. I was pretty
skeptical until I installed them and when I saw the difference they made. I was pretty much
blown away!
I’d never considered the issue for cell sites but now that you mention it, of
course!
73,
Kim N5OP
"People that make music together cannot be enemies, at least as long as the music
lasts." -- Paul Hindemith
On Jan 15, 2018, at 20:19, Tim Duffy <k3lr@k3lr.com> wrote:
Hello Kim:
Excellent post about soft start on your air conditioners. That is
important on generators and also for the AC mains as well. All six
(we use two 3 ton units for shack cooling) air conditioner units here
at K3LR have soft starts and there is no drag on the AC power when they come on
line.
I learned about soft start air conditioners early on when constructing
cellular networks. Without soft start the generator voltage drop would
cause significant issue for the sensitive network equipment.
73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
Kim Elmore
Sent: Monday, January 15, 2018 9:11 PM
To: john@kk9a.com
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Kohler home generator hash?
FWIW, we have a small General 14 kW NG air-cooled generator with a
manual transfer switch. It's RF quiet at any frequency I can hear,
from the BC band through 450 MHz.
As an aside, we had trouble starting our air conditioner units with it
(4 ton and a 2 1/2 ton units). The start current requirements were
well beyond what it could reliably handle. But, last summer I
installed some true soft-start modules (made in Australia). The
difference was staggering: I can now start both units simultaneously
without problem on generator power and lights no longer dim when the units
start on commercial power.
Kim N5OP
"People that make music together cannot be enemies, at least as long
as the music lasts." -- Paul Hindemith
On Jan 15, 2018, at 19:55, <john@kk9a.com> <john@kk9a.com> wrote:
That is a monster! It is great to hear that they are quiet and you
can
keep
all of your operating positions manned during a power outage. My
power blipped off a half dozen times in the RTTY Roundup last week
but luckily
it
came right back on.
John KK9A
To: "'Donna Hinshaw'" <ag6v@whidbey.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Kohler home generator hash?
From: "Tim Duffy" <k3lr@k3lr.com>
Reply-to: k3lr@k3lr.com
Date: Mon, 15 Jan 2018 13:59:15 -0500
List-post: <mailto:towertalk@contesting.com>
Hello Dana
I installed a 48RCL with transfer switch 3 years ago. It is totally
RFI quiet. That was one of the qualifiers.
It has been an awesome machine. 48 KW load tested.
73
Tim K3LR
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