NOAA updated its predictions for smoothed sunspot numbers and solar flux
through the end of 2022. As of last month, their predictions ended in 2019.
Their prediction shows a smoothed sunspot number of 10 for December 2018,
declining to 2 in July 2020 through January 2021, then 1 during
Harris uses BNCs at this power level (3CX-1500A7) in RF-353 (AM-7224)
amplifier. They were used under harsh conditions for decades.
73,
Martin, OK1RR
Dne 08. 12. 18 v 3:07 Tim Duffy napsal(a):
When you look at an N connector, specifically the center pin - remember that
the N connector center
What helps is filling a connector with silicone dielectric grease. Cheaper
than dry nitrogen and the rest of the stuff needed with it. :-)
73, Mike
www.w0btu.com
On Fri, Dec 7, 2018 at 8:40 PM vk2wf wrote:
> Hi allIn my past life I used to service Hagenuk ATUs for the navy.
> Internally a BNC
Here's two photos behind my modified antenna switch.
www.w0btu.com/files/misc/F-connector_1500+W/
Towards the red antenna switch is a short, brown-jacketed section of RG-59;
then a double-female F barrel; and then black F-6 which goes outdoors to my
transmit antennas.
The brown RG-59 gets
Hi allIn my past life I used to service Hagenuk ATUs for the navy. Internally a
BNC connector was used for main feed. It was a nominal 1kw device but it was
pressurized to 14psi with nitrogen. 73Adrian vk2wf
Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network
Original
Hi Tim!
That's an excellent thought, but some people do it.
As a side point, I run 1500 watts (>2000 into a dummy load!) *through F
connectors* and F-6 coax. They don't get the *least* bit warm, even after I
smell the transformer oil fumes! You just have to be careful (but you know
that ;-).
On 12/7/2018 6:07 PM, Tim Duffy wrote:
W6NL asked me this question - would you run 1500 watts with BNC connectors?
Tim K3LR
Actually, I have gotten away with BNC connectors on 160 meters
at 1500W for decades. YMMV!
73
Rick N6RK
_
Searchable Archives:
When you look at an N connector, specifically the center pin - remember that
the N connector center pin is the same as the center pin of a BNC connector.
W6NL asked me this question - would you run 1500 watts with BNC connectors?
73
Tim K3LR
(Only 7-16 DIN and TONS of "quality" UHF connectors
Thank you, Frank and Steve! I just learned something useful. :-)
I bought these N plugs in the early 1980s from Nemal Electronics. Perhaps
what you are describing was not available then? (That's a rhetorical
question. ;-)
If I ever get back on VHF/UHF, I'll get those.
73, Mike
www.w0btu.com
Hi Mike,
Captivated pin N connectors for hardline coax fits tightly over
the center conductor.
Captivated pin N connectors for flexible coax typically has a
pin that requires solder.
Floating pin N connectors belong in the trash bin.
73
Frank
W3LPL
- Original Message -
I'm assuming the center pin is the 6 pin and the 1-5 either go
counter or clockwise.
The center pin is pin 6 however, the other five are not numbered
sequentially due to backward compatibility with numbering for the
*three pin* DIN. From Wikipedia:
The 3/180° and 5/180° connectors were
Hmm, how do solder that center pin if you can't pull it out of the
connector? If it comes out of the connector easily, it's not a true
captured pin connector (which is made for solid center conductor coax
like LMR-400, LDF4, etc.), not RG-213, etc.
-Steve K8LX
On 12/07/18 19:10 PM, Mike
Well here's the advantage of captivated center pins: the pin is NOT
bonded to the center conductor. IOW, if the coax center conductor
shrinks a bit, it can slide in the center pin and the pin stays put.
And that's exactly what you want it to do - especially with an N connector.
-Steve K8LX
I have acquired the AYtechnologies K9AY system boxes. This is a used unit but
in excellent shape.
The 6 pin din plug on the back of the control box is not numbered. Is the
pin-out standard?
5 pins with a center pin above the connector "key" notch.
Don't want to hook this up backwards, hi.
Very well said indeed, Bruce!! :-)
73, Mike
www.w0btu.com
On Fri, Dec 7, 2018, 1:47 PM F Z_Bruce wrote:
>
> Both types become quite reliable when assembled with a high degree of care.
>
> Large temperature variations/freezing can be a problem.
>
> 73
> Bruce -k1fz
>
>
_
Hello Arunas,
While the relatively new 4.3-10 family of "mini DIN" connectors is
far superior to any connectors we've discussed in this thread, their
cost is nearly ten times higher.
On the other hand, the much bulkier 7/16 DIN connectors offer
similar high performance and they're widely
Both types become quite reliable when assembled with a high degree of care.
Large temperature variations/freezing can be a problem.
73
Bruce -k1fz
On Fri, 7 Dec 2018 09:37:42 -0500, MU 4CX250B <4cx2...@miamioh.edu> wrote:
Interesting discussion, and I appreciate the many viewpoints.
Exactly my experience, even with captivated pins!! And my coax runs were
only about 100' long.
The captivating washers were made of Teflon®, *and Teflon cold flows*. This
was when I lived in Toledo, Ohio when the temperature dropped well below
zero.
Four photos of those N connectors are at
Interesting Arunas,
73, Jim - KR9U
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
ly...@qrz.lt
Sent: Friday, December 7, 2018 6:39 AM
To: topband@contesting.com
Cc: topband@contesting.com
Subject: Re: Topband: Rather use N-type (was Re: The answer
On 12/7/2018 9:44 AM, herr42 wrote:
Never seen uhf connectors in military. Lots of N tho
My two 500 foot RG-216 military surplus cables both
eventually exhibited retracted pins on the type N
connectors at both ends. I replaced them with PL-259's.
My 150 foot RG-218 military
Never seen uhf connectors in military. Lots of N tho
Sent from my Verizon 4G LTE smartphone
Original message
From: j...@kk9a.com
Date: 12/7/18 9:13 AM (GMT-08:00)
To: topband@contesting.com
Subject: Re: Topband: Rather use N-type (was Re: The answer to PL-259
On 12/7/2018 12:53 AM, k...@radioprism.com wrote:
(1500W) "...has excellent RF properties..." "In more than
20,000 hours of 24 x 7 operation with the four StationPro's
in the author's station, there has not been a single relay
failure."
A somewhat more robust relay is the Omron MJN
Perhaps you are looking at the N connector lead, the actual pin where RF
flows is Ø.120 which is not much smaller than a UHF connector (Ø.156). I
use a number of N connectors at my station and have no issues.
John KK9A - W4AAA
Bruce w8hw wrote:
I worked in the commercial/industrial radio and
My 160m T tuner uses 3x Schrack PCB SPST relays. 900w FT8 and full QRO
SSB. No problems in 4 years. 12vdc PCB relay by Schrack (RZ01-1A4-D012)
with a plastic arm from the coil armature to the contacts that is rated
5000v coil to contact isolation, 12a at 250vac switching, and has
redundant
Interesting discussion, and I appreciate the many viewpoints. One
consideration, when weighing N-connectors vs PL259s, is what happens
to the cable after the connector is attached. Nobody disputes that an
N-Connector properly installed on, e.g. a length of Heliax running up
the side of a
I worked in the commercial/industrial radio and broadcasting for 40 plus
years. While it it true that type-n is mostly used, we must remember
that hams deal with high power and high SWR sometimes, both are not
type-N strong points because of the small pin used in type-N can not
handle the high
The only coaxial cable (braided shield) I use are the Times LMR products or
equivalent with the LMR connectors. They have the captivated center pins...no
issues whether jumpers or cable runs up antenna supporting structures. On
hardline (non-air) the center conductor is bonded to the foam so
That crazyI’m in the utility industry and Andrew LDF cable terminated with
Type N connectors by the thousands, outside for years and no issues. Many with
the old solder on type N connectors for 1/2” and more recently the newer
simplified ring stop connectors and no problems for either.
There is new connector already widely used in cellular market - 4.3-10.
Designed to get rid of Intermodulation problems - outer contact is
torque independent.
Size is +- same as N/ UHF connector, inner pin is about 3mm in diameter,
graph shows 6 kW at 100 MHz at perfect mach.
Hi, All-
Looking back at some of the better construction articles I've
saved in recent years, this one stands out:
"The StationPro Master Station Controller" by W8ZR in QST,
August 2010, page 30-34. He likes to do things up nice, and
it sure shows in the finished product. It looks professional.
Interesting and inconvenient, but I wonder if the problem is partly our
expectation for the cable to encounter various temperature gradients.
There could be various expansion coefficients at play across the cable, Sheath,
Braid, Dielectric (nylon/foam) and Core. When you think of the
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