Sam,
P.S. I only run 100 watts, but these relays might be adequate for you
I'm sure there will be better options that others will mention.
Don (wd8dsb)
On Thu, Dec 6, 2018 at 3:10 PM Don Kirk wrote:
> Hi Sam,
>
> In my remote base loading box I used relays AD5X specified in one of his
>
The shield has to be soldered to be installed properly. If I use 259's I only
use silver plated ones where soldering the shield to the connector is easy.
CecilK5DL
Sent from my Verizon, Samsung Galaxy smartphone
Original message
From: Paul Christensen
Date: 12/6/18
The old school solder on type N connectors are to difficult for most to do
properly...
I don't fool with them anymore. The Times Microwave EZ series crimp connectors
for their LMR-400 & 600 cable is the only way to go. I use them on all my
stuff. Legal limit is no problem...3kw and up
Hi Sam,
In my remote base loading box I used relays AD5X specified in one of his
articles on a matching network. They might be over kill for your project
as they are 3PDT relays. The relays are Deltrol Controls part number
21014-81.
They come in various mounting configurations:
- 375F:
Sam, several years ago I started doing relay switching for automation of
band changes etc. At the time I had a 4x811A amp so (optimistically) was
aiming for the kilowatt power handling ability (really that amp was lucky
to put out 650W).
I had looked at what commercial or published article
Some experience here:
http://www.bavarian-contest-club.de/projects/misc_projects/hfrelais.txt
73,
Martin, OK1RR
Dne 06. 12. 18 v 17:40 Sam Josuweit napsal(a):
Can anyone recommend a good general use relay for antenna switching in the
800-1000w power range? I know using power relays can be a
I have been using PL-259 connectors forever. I have switched to crimp
connectors when I need to make up a new cable. No sense replacing the
soldered connectors if they are working fine. ThePL-259 is a low loss, easy
to assemble connector for up to at least 6M (nothing higher in frequency
here)
Thanks everyone for some great suggestions on the relays. I've been having a
great time with the challenge of Topband over the last few months. Picked up
a bunch of countries, but the lack of sleep is killing me.
Sam Josuweit (N3XZ)
_
Searchable Archives:
Greg,
I completely agree. For all my outdoors applications I use N connectors.
Unfortunately, amateur radio gear (even seriously expensive gear) is still
built with SO-239 connectors which perpetuate the use PL-259 male
connectors. As a result, my station and my DXpedition gear contain both,
I agree with Rick,
If an N connector is not designed to fix the relationship of the center pin
(soldered to the center conductor) to the body it should not be used
outdoors or on long runs of unburied coax exposed to full seasonal
temperatures.
I learned that the hard way on unfixed pin N
Friends,
I've got to disagree with the many comments slamming the old but venerable
PL259 and advocating for N.
While the N connector is great from an RF standpoint, one should note that the
impedance aspects of the N at HF are irrelevant. Not small...irrelevant by
orders of magnitude.
Can anyone recommend a good general use relay for antenna switching in the
800-1000w power range? I know using power relays can be a roll of the dice.
According to modeling peak voltages should be less than 450V.
Thanks
Sam(N3XZ)
_
Searchable Archives:
For anyone that doubts the loss of a good 259. Google K2RIW on the subject
who knows a thing or two about UHF and did some numbers on the subject.
I have used for a good long time the Silver plated Teflon with a gold pin
from the RF connection. I usually end up buying 50 at a time.
73 Clive
I think the primary flaw of the PL-259/UHF connector is that shield
connectivity is strictly a function of thread tightness. There's no inner
sleeve to maintain good electrical contact of the shield with any loosening
of the connector plug. Otherwise, I have no issues with either connector up
Seeing I mentioned K2RIW this is a link to his comments about 259s at 70cms
much less 160m.
https://www.eham.net/ehamforum/smf/index.php?topic=34680.0;wap2
73 Clive GM3POI
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of N2TK,
Tony
Sent: 06
I agree Clive, there is no reason to switch from high quality UHF
connectors such as Amphenol 83-1SP silver plated connectors
on 6 meters or below. They have much better center pin contact
pressure than N connectors and are much less susceptible to
installation errors by either amateur or
The issue with PL-259 is the leaking of common mode current into the
internal RF current. On higher bands the leaking is very bad but difficult
to see or understand.
I went to over 50 WF installation on contest station, DX station, city lot
QTH and very quiet rural areas. I noticed several
About twenty-five years ago I started replacing many of my PL259
connectors with N-connectors. I did this mostly because my VHF/UHF buddies
convinced me that the impedance bump of an N-connector was less than that of
a PL259. Also, about the same time I started using mil-surplus Transco
>"Older generation N connectors with floating center pins are highly
problematic because its difficult to install the center pin with proper
depth and axial alignment."
Lived it. To support myself during college, I was chief engineer at an
AM/FM station in Dekalb, Illinois. One winter morning,
I agree with Frank, Not that I necessarily think PL-259's are the greatest,
they are not. But I have never really learned to put N-connectors together and
don't trust my skills at trying it again. For HF I don't think the added
expense with any lower loss is worth the difficulty with
Hi all,
I can confirm Martin's and Greg's experiences. It is strongly recommended to
avoid
using the PLs at all. I did the same changes and since that no problems at all.
Of course any adapters are avoided too. All cables must be properly assembled
with proper
and high quality N-connectors.
You're not planning on hot-switching it, are you? That's hard on
amplifiers. :-)
73, Mike
www.w0btu.com
On Thu, Dec 6, 2018, 10:48 AM Sam Josuweit wrote:
> Can anyone recommend a good general use relay for antenna switching in the
> 800-1000w power range? I know using power relays can be a
On Thu, Dec 6, 2018, 9:59 AM W3LPL wrote:
N connectors on HF? No thank you.
I'm with you, Frank. I just don't have these problems with them.
After soldering more UHF plugs in 42 years than I could possibly ever
count, I know how to properly assemble and solder them. And I keep the
contact
re the pl259/so239: The impedance bumps are generally irrelevant where
the cable connects to the antenna or equipment due to the way most
wiring is done at those points. notice I said generally.
The only time it may be an impedance bump issue is in switching where 50
ohm is not maintained or
Some of the cheap imports may be metric thread.
Regarding N or UHF, I've switched to good quality crimp fittings eons ago,
and if one buys the proper prep and a quality crimp tool they are very
reliable.
Pete k1zjh
_
Searchable Archives: http://www.contesting.com/_topband -
Interesting.
I’ve used PL-259’s for over 45 years for HF & most all 6m & 2m plugs. The rare
random problems with them were the result of cheaping out with poor quality
connector, inadequate weather-proofing, or poor connector assembly/soldering.
Using N’s and then having to use N to PL-259
No
From: Mike Waters [mailto:mikew...@gmail.com]
Sent: Thursday, December 06, 2018 12:02 PM
To: Sam Josuweit
Cc: topband
Subject: Re: Topband: Recomended Relays
You're not planning on hot-switching it, are you? That's hard on amplifiers. :-)
73, Mike
www.w0btu.com
On Thu, Dec 6,
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