Elecraft

KXPA100 AMP and KXAT100 ATU pics and info

Classic

List

Threaded

55 messages Options

123

Jim Brown-10

Re: why mix rf connector types within the product line?

On 4/26/2013 5:05 PM, Joe Subich, W4TV wrote:
> Not only is it too easy to damage the center pin/socket, BNC is a
> "clamp" type connector and is prone to improper assembly.

YES. This is one big reason why I try to avoid BNC connectors. I don't
buy "cable assemblies," both because I don't want to pay someone else to
do what I can do better myself, and because I don't trust unknown
vendors to use high quality connectors and high quality cable. Most
pre-made "cable assemblies" are a "pig in a poke" at best, and cheap
junk at worst.

I buy good cable and good connectors and install them myself. While
it's certainly possible to install crimp-type connectors well, it
requires very good connectors that physically fit the cable, and a very
good crimp tool that physically fits the connector. Good crimp tools
are expensive, and to do it WELL, you need a different tool for every
different connector that you want to use.

Appliance operators may be happy with buying pre-wired BNC cable
assemblies from vendors who believe that "hams are cheap" (and that's
exactly what one of the most popular East Coast vendors of ham cable
assemblies told me when I complained about the JUNK DIN connectors they
had sold me, and that same vendor didn't have a real technical data
sheet tor the coax he wanted to use for a DXpedition that wanted to buy
coax from them. The BNC cable shipped with one of my P3s was defective. :)

UHF connectors are very good connectors for use at HFat ham power
levels. Because they're not precisely 50 ohms, they are less desirable
at VHF and above.

One of the major reasons BNCs are popular with QRP folks is that they
are smaller, so they take up less space on a panel, and lighter in weight.

73, Jim K9YC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

alsopb

Re: why mix rf connector types within the product line?

In reply to this post by Jeff Herr

Nope! My Wavetek sig gen uses type N. Bird watt meters use type N.
Some dummy loads use type C. The list goes on.

Some Collins transmitters used RCA connectors.
73 de Brian/K3KO

On 4/27/2013 01:39, Jeff Herr wrote:

> Come on.
>
> All test equipment uses it! ALL!
>
>
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Joe Subich, W4TV
> Sent: Friday, April 26, 2013 17:05
> To: [hidden email]
> Subject: Re: [Elecraft] why mix rf connector types within the product line?
>
>
> > I wish it was standard practice to put BNC connectors on all QRP gear.
>
> Not only is it too easy to damage the center pin/socket, BNC is a "clamp"
> type connector and is prone to improper assembly. Having "grown up" with
> Heathkit, I would rather have RCA connectors - the old kind where the shield
> can be soldered all the way around - than BNC connectors on RF devices below
> 50 MHz and less than 50 Watts.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 4/26/2013 7:46 PM, Tim wrote:
>> Hi,
>>
>> I wish it was standard practice to put BNC connectors on all QRP gear.
>>
>> Tim
>> KE4KE
>>
>>
>> On 4/26/13 6:36 PM, Jeff Herr wrote:
>>> I will end up taking the units (kx3 and that nice amp) with me as I
>>> travel.
>>>
>>> In effect now we are forced to need adapters.
>>>
>>> Do you think BNC connection is not suitable from an engineering
>>> perspective?
>>>
>>> WW6L
>>>
>>>
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this
>>> email list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2241 / Virus Database: 3162/5775 - Release Date: 04/26/13
>
>

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2241 / Virus Database: 3162/5775 - Release Date: 04/26/13

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

George Danner

Re: why mix rf connector types within the product line?

In reply to this post by David Christ

David - Those are very good reasons to keep UHF connectors.
The impendence mismatch of UHF is probably far less than the other
mismatches in the line/antenna.
Not to mention that BNC come in 2 flavors - 50 ohm & 75 ohm. A 75 ohm BNC in
a 50 ohm system will have a far worse mismatch than the worst UHF (not
shorted of course); not to mention that 50 ohm & 75 ohm connectors can be
intermittent if mixed and a "booger" to find because the pins are a slightly
different diameter. Don't ask how long it took us to discover this and
finally correct it in a plant with thousands of BNC connectors installed
over a 30 year span (TV broadcasting & OB production/live units).

The UHF connector is easy to make up properly, rugged mechanically, able to
be waterproofed and it fits large cables well and has adaptors for smaller
diameter cables.

BNCs are good for small cables, need a higher level of skill to make-up
properly (crimp is recommended) & they should have waterproofing as well
unless not in direct contact with liquids. BNCs make the ground first. If in
a high static area they would be preferred. BNCs take-up far less panel
space than either a UHF or type-N connector.

Type N connectors are wonderful - good match to 50 ohms, strong
mechanically, available for most RF lines (I've used them from RG 58 to 3"
hard copper), inherently waterproof (still waterproof them if outside in the
weather & they also make the ground first. They are the most expensive of
the 3 major types and like BNC must be ordered for the cable type used.

Won't even discuss RCA connectors for RF but they too have a place in some
equipment.

There is no universal RF connector - yet. Don't believe me just browse a
Pasternack or Bracke catalog for all the different RF connectors in use
today.

73
George
AI4VZ

-----Original Message-----
From: David Christ
I can think of one other reason why UHF has hung around so long. It is
cheap, easy to find, and mates nicely with the oh so common RG-8 sized cable
that is generally used in HF shacks.

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

w5tvw

Re: why mix rf connector types within the product line?

In reply to this post by Jeff Herr

Obviously you are not listening. In the Elecraft line, the QRP rigs ALL use
the BNC connector. They work well. Adapters are available for BNC/binding
Posts...very practical in a filed installation. Who wants to be bothered
with perhaps the poorest connector ever devised for no big impedance "bump",
very poor connector in the VHF UHF range. (Any sharp repeater technician
will curse the PL259 and favor the MUCH better "N" connector in the VHF/UHF
range!) Three cheers for throwing the damned RCA phono plug out that was
so pushed by Collins radio. They actually are BETTER at VHF than the
PL-259/SO-239 which should have been made obsolete years ago.

All I can say is "Get used to making up" the BNC" plugs. They made the best
choice for QRP stuff over the PL-259/SO-239 and the RCA plugs for RF use.

73,
Sandy W5TVW

-----Original Message-----
From: Jeff Herr
Sent: Friday, April 26, 2013 6:55 PM
To: 'iain macdonnell - N6ML'
Cc: [hidden email]
Subject: Re: [Elecraft] why mix rf connector types within the product line?

I don't want to buy or make or use any adapters.

Why not keep the connector consistent across the product line?

That is the question!

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
macdonnell - N6ML
Sent: Friday, April 26, 2013 16:53
To: Jeff Herr
Cc: [hidden email]
Subject: Re: [Elecraft] why mix rf connector types within the product line?

On Fri, Apr 26, 2013 at 4:36 PM, Jeff Herr <[hidden email]> wrote:
> I will end up taking the units (kx3 and that nice amp) with me as I
travel.
>
> In effect now we are forced to need adapters.

Or you could get some thing like:

http://abrind.com/product/rg58au-rg8x-240uf-95tc-braid-100-foil-coax-cable-a
ssemblies-bnc-n-pl259-sma-so23/pl259-to-bnc-male-jumpers/

I can't vouch for ABR's products (never tried them). Personally, I would
make my own....

73,

~iain / N6ML

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3272 / Virus Database: 3162/6276 - Release Date: 04/26/13

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

M0AFJ

Re: why mix rf connector types within the product line?

In reply to this post by Don Wilhelm-4

As soon as everyone standardises on N types the better, easy to make, splash proof, constant impedance, easily available, industry standard, rugged, it's a no brainer...

Best regards, Tim Hague
Skype m0afj.Tim
Sent on my iPad

On 27 Apr 2013, at 00:50, Don Wilhelm <[hidden email]> wrote:

> Jeff,
>
> There are a number of amateurs who just do not like BNC connectors and will not use them. In fact I have heard some comment when looking at a K2/10 say "That antenna connector MUST be changed to a UHF type". While I do not agree, it is a perception that must be dealt with at Elecraft. Couple that with the fact that BNC is largely the 'standard' for QRP transceivers, but not for 100 watt and over rigs where the UHF connector reigns supreme.
>
> Adapters are not a problem IMHO, they can just stay on the SO-239 jack and usually do not get in the way.
>
> 73,
> Don W3FPR
>
> On 4/26/2013 7:36 PM, Jeff Herr wrote:
>> I will end up taking the units (kx3 and that nice amp) with me as I travel.
>>
>> In effect now we are forced to need adapters.
>>
>> Do you think BNC connection is not suitable from an engineering perspective?
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Edward R Cole

Re: why mix rf connector types within the product line?

In reply to this post by Jeff Herr

Concur on some of what Jim Brown said, but have ordered high quality
cables from vendors that cater to commercial customers vs ham
vendors. For repeaters I used RG-223 cable with N-male connectors
from reputable vendors. Of course my employer paid.

I make almost all my cables as, I too, trust my own ability to chose
good quality components and do quality installation. I did make up
RG-58 and RG-8/x cables with crimp connectors where they were in
long-term installation. For test cables or any that are subject to
repeated movement my experience is the crimps eventually fail. I
still like them for the convenience (in certain circumstances).

At work I mainly used BNC or N connectors. Also had TNC and mini-UHF
on certain radios. Very few industrial radios use
SO-239/PL-259. Mainly seen on marine radios (and CB/ham, of
course). Aircraft radios use BNC a lot. TNC and sma are used quite
a bit will cellular equipment.

At work I had the $500 Times Microwave crimper with multiple dies for
different connectors. At home I have a $99 copy that does a fine job
on RG-58 and RG-8/x (or RG-6). But I trust compression nut style
connectors where I want absolute reliability.

I least like PL-259 as they are susceptible to shorting if overheated
in assembly. I use a ton of adapters, though one needs to be careful
with brand as not all are good. Amphenol PL-259 are what I use.

BNC is appropriate on the KX3 and other portable
equipment. Understandable that SO-239 are used for amplifiers,
etc. This topic is kind of no issue to me? If you were dealing with
50 contact connectors I might agree.

73, Ed - KL7UW

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

David Cutter

European source of coax assemblies

I've used Gigatronix for professional and personal use: not expensive and
very easy to order direct from their online configurator. Particularly good
for European customers.

http://www.gigatronix.co.uk/default.php?_minc=home

David
G3UNA

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

M0AFJ

Re: European source of coax assemblies

Rhophase are also good, bought a lot from them over the years and they have never let me down.

Best regards, Tim Hague
Skype m0afj.Tim
Sent on my iPad

On 28 Apr 2013, at 11:36, "David Cutter" <[hidden email]> wrote:

> I've used Gigatronix for professional and personal use: not expensive and very easy to order direct from their online configurator. Particularly good for European customers.
>
> http://www.gigatronix.co.uk/default.php?_minc=home
>
> David
> G3UNA
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

picmaster

Re: why mix rf connector types within the product line?

In reply to this post by N8MSA

Generally it depends on what you're doing in your radio hobby. Practically all types of connectors can be (and have been) used for our amateur radio purposes with more than acceptable results. When it comes to RF measurements that need to be done repeatedly with high precision (especially impedance measurements), all the mentioned companies are using N/SMA connectors, having in mind the limited mating cycles and necessity of calibration procedures.

Lower cost connectors doesn't have a controlled impedance throughout the connector body, and also doesn't have clear impedance plane. From the other side most of them are easy to be understood/assembled/repaired by the average Joe even without special skills/tools, which definitely helps people to experiment :D.

And finally - I personally don't mind about the Elecraft connectors choice. I usually check the vendor docs before buying some equipment, and if the connectors are different than the ones in my setup, then I'll just buy the adapter and live with it :D.

Kind regards,
Nikolay / LZ1NRD

----- Цитат от [hidden email], на 27.04.2013 в 03:00 -----

> Engineering perspective? I'm an MSEE, have been working with BNC connectors for thirty years and I don't have issue with their use on HF radio gear. If they're good enough for Agilent, Rohde and Schwarz, Anritsu, et al, they're good enough for a 10W HF transceiver.
>
>
> Mike Alexander - N8MSA
>
> [hidden email]

-------------------------------------

Страхотни Великденски намаления на
Adidas,Puma,Nike,Lotto,Reebok,Champion в магазини SportDepot! Виж тук >>
http://www.sportdepot.bg/bg?utm_source=mailbg&utm_medium=footer_easterpromo&utm_campaign=easterpromo

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Bill Frantz

Re: why mix rf connector types within the product line?

In my emergency go kit I have adapters to convert the SMA-F on
my FT-60 to:

UHF-F
BNC-F
N-F
and N-M

In addition the Little Tarheel antenna mount in the 4Runner
which is a Diamond K400 has mini-UHF connectors.

Sometimes I think that some manufacturers invent a new connector
type to lock their users in, or at least corner the market in
adapters. I'm sure Apple does that and since Phil Parrish -
W4AIN <www.myhamcables.com> could not find the 7 pin microphone
connector used by my Yaesu FTM-10R or even order one from Yaesu,
I think Yaesu does it as well.

I'm happy when I already have the adapters I need for a new
piece of equipment.

Cheers - Bill, AE6JV

On 4/28/13 at 6:12 AM, [hidden email] wrote:

>Practically all types of connectors can be (and have been) used
>for our amateur radio purposes with more than acceptable results.
-----------------------------------------------------------------------
Bill Frantz |Security, like correctness, is| Periwinkle
(408)356-8506 |not an add-on feature. - Attr-| 16345
Englewood Ave
www.pwpconsult.com |ibuted to Andrew Tanenbaum | Los Gatos,
CA 95032

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Edward R Cole

Re: why mix rf connector types within the product line?

In reply to this post by Jeff Herr

Just one more comment on this topic:

Ron addressed marine use. My former job of 15-years was working as
lead electronic tech for an oil spill recovery organization whose
primary region of operation is Cook Inlet in southcentral Alaska (200
by 30 mile body of salt water). Electronics installed on boats
ranging from 25-foot to 210-foot provided an excellent outdoor
"laboratory" for testing cables and connections. Anything exposed
would corrode within three years. I sealed coax connectors of all
types by using a gray annealing tape from 3M (Scotch 30, I believe)
which was covered with a double wrap of Scotch-33+. Not all
electrical tape is the same and the 33 has more stretch in cold
wx. Cheap electric tape would get brittle and either break or
crack. I also used heat-shrink on some coax connections. Both
provided excellent service in a 100% humidity salt-water
atmosphere. I unwrapped some after 5-years service and were still
bright and clean.

DC wiring is more problematic when it typically ties to terminal
strips. Some experimentation with paint-on coatings worked but not
universally used as DC wiring needs to remain removable for
servicing. Some marine radios and radars provide rubber boots over
connectors. They were of marginal success. Keeps direct spray off
but not sealing from salt vapor. Most marine electronics has greatly
improved connections so that they are molded multi-pin design and
water-tight these days. Lots of gaskets used in marine electronic
cabinetry/enclosures.

I prefer to use N connections on VHF and higher frequencies as they
self-seal to an extent using an internal gasket. But always seal
over, as described above, as well. I have over 20 N-connectors in my
2m-eme system, alone. I primarily use LMR cable from Times Microwave
(and some RG-213 and Heliax). RG-58, RG-8/x, and LMR-240 is used
with BNC or N connectors mostly for short jumpers. UHF connectors
are used on equipment having those style connectors, since adapters
typically add some loss and unreliability. It pays to buy quality
for adapters; cheap ones have SWR and high insertion losses. You get
what you pay for (generally).

Hardline connectors, properly sealed, last for over a decade.

73, Ed - KL7UW

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Jim Wiley

Re: why mix rf connector types within the product line?

Did you perhaps mean Scotch #70 self-fusing silicon rubber tape? I have
used it for years to seal connections, never opened one (after up to 25
years of service) that looked anything other than brand new. Expensive,
but it works like nothing else. When properly installed and
over-wrapped with either Scotch 88 or Scotch 33+, connections become
next to invulnerable. Hint: Put a black ty-wrap over the end(s) of the
over-wrap tape to keep it from working loose in wind and weather.

- Jim, KL7CC

On 4/28/2013 11:02 AM, Edward R Cole wrote:

> Just one more comment on this topic:
>
> Ron addressed marine use. My former job of 15-years was working as
> lead electronic tech for an oil spill recovery organization whose
> primary region of operation is Cook Inlet in southcentral Alaska (200
> by 30 mile body of salt water). Electronics installed on boats
> ranging from 25-foot to 210-foot provided an excellent outdoor
> "laboratory" for testing cables and connections. Anything exposed
> would corrode within three years. I sealed coax connectors of all
> types by using a gray annealing tape from 3M (Scotch 30, I believe)
> which was covered with a double wrap of Scotch-33+.

Eric Swartz - WA6HHQ

Re: why mix rf connector types within the product line?

Administrator

In reply to this post by Bill Frantz

We're hitting the posting limit on this thread. lets close it at this time.

73,

Eric
List Moderator
elecraft.com
_..._

On Apr 28, 2013, at 8:08 AM, Bill Frantz <[hidden email]> wrote:

> In my emergency go kit I have adapters to convert the SMA-F on my FT-60 to:
>
> UHF-F
> BNC-F
> N-F
> and N-M
>
> In addition the Little Tarheel antenna mount in the 4Runner which is a Diamond K400 has mini-UHF connectors.
>
> Sometimes I think that some manufacturers invent a new connector type to lock their users in, or at least corner the market in adapters. I'm sure Apple does that and since Phil Parrish - W4AIN <www.myhamcables.com> could not find the 7 pin microphone connector used by my Yaesu FTM-10R or even order one from Yaesu, I think Yaesu does it as well.
>
> I'm happy when I already have the adapters I need for a new piece of equipment.
>
> Cheers - Bill, AE6JV
>
> On 4/28/13 at 6:12 AM, [hidden email] wrote:
>
>> Practically all types of connectors can be (and have been) used for our amateur radio purposes with more than acceptable results.
> -----------------------------------------------------------------------
> Bill Frantz |Security, like correctness, is| Periwinkle
> (408)356-8506 |not an add-on feature. - Attr-| 16345 Englewood Ave
> www.pwpconsult.com |ibuted to Andrew Tanenbaum | Los Gatos, CA 95032
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Edward R Cole

Re: why mix rf connector types within the product line?

In reply to this post by Jim Wiley

Jim,

Yes, I think that is the correct description. I never could remember
the Scotch number. It is superior to using coax seal and comes off
with a simple slice of a razor knife. Scotch-70 is very
expensive. Scotch-88 is OK but Scotch-33+ seems more flexible in
cold temps. Tywrap idea good. I used them in general for securing cables.

Thomas&Betts brand "Tywrap" copyrighted name are the only plastic
ties found to survive -50F temps without breaking. The cheap brands
just snap in temps of about zero F. If running heavy cable runs then
using tywraps with a metal band is better. But must be cushioned to
keep metal from digging into cable insulation.

Those of us that have worked professionally in AK know these details
and learned there are no shortcuts.

73, Ed - KL7UW

At 12:06 PM 4/28/2013, you wrote:

>Did you perhaps mean Scotch #70 self-fusing silicon rubber tape? I
>have used it for years to seal connections, never opened one (after
>up to 25 years of service) that looked anything other than brand
>new. Expensive, but it works like nothing else. When
>properly installed and over-wrapped with either Scotch 88 or
>Scotch 33+, connections become next to invulnerable. Hint: Put a
>black ty-wrap over the end(s) of the over-wrap tape to keep it from
>working loose in wind and weather.
>
>
>- Jim, KL7CC
>
>
>On 4/28/2013 11:02 AM, Edward R Cole wrote:
>>Just one more comment on this topic:
>>
>>Ron addressed marine use. My former job of 15-years was working as
>>lead electronic tech for an oil spill recovery organization whose
>>primary region of operation is Cook Inlet in southcentral Alaska
>>(200 by 30 mile body of salt water). Electronics installed on
>>boats ranging from 25-foot to 210-foot provided an excellent
>>outdoor "laboratory" for testing cables and connections. Anything
>>exposed would corrode within three years. I sealed coax connectors
>>of all types by using a gray annealing tape from 3M (Scotch 30, I
>>believe) which was covered with a double wrap of Scotch-33+.

selmic

Re: KXPA100 AMP and KXAT100 ATU pics and info

In reply to this post by DaveL G3TJP

Hi Dave,
Here are the links, below, to 100 W Elecraft amplifier
http://t.co/uP2G3nOaxb
http://t.co/LycW6pQ0BO
http://t.co/VQEwu8EZSh

Have a good day.
Zoran, VE3ESP

123