Date   

Re: PL259 - how tight?

Richard Smith
 

I enjoy reading all the anecdotal accounts.  I wonder if someone actually measured the connection?  RAS

On May 2, 2019, at 12:57 PM, John McCann <gr8dxr@...> wrote:

Oh yeah, that should do it!

Tight as a tick in a summer campground...

John N7MZ


On 5/2/2019 6:31 AM, Ben Loper wrote:
I like to use a 6 foot length of pipe on the handle to give me some leverage. I have my wife sit on the radio while I put my full body weight on the pipe. That will lower your SWR about 3 points


Re: PL259 - how tight?

ab2tc
 

Hi,

True, that's what they are showing in the video. But if you look carefully at the picture of the connector you see two "flats" used to tighten the clamp against the coax and one full hex nut just behind the knurled part of the sleeve. Unfortunately the video does not show how they intend to use that.

AB2TC - Knut


On Thu, May 2, 2019 at 01:22 PM, Ken K6MR wrote:

Yes, but those are clamp connectors.  The flats are for tightening the connector onto the coax.  Same as a typical Heliax connector.  What I’m talking about is the shell on the UHF male connector.  I’ve never seen one with flats.

 

The other puzzling connector is type N.  Some have flats, some don’t.  When I worked at HP, all of our production line test cables had the flats and were torqued.  Without the flats it’s pretty difficult to tighten it to the correct torque.

 

Ken K6MR

 


From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of Steve Sacco via Groups.Io <nn4x@...>
Sent: Thursday, May 2, 2019 9:31:35 AM
To: elecraft-k3@groups.io
Subject: Re: [Elecraft-K3] PL259 - how tight?
 
Actually, I've been installing some beautiful Messi and Paoloni connectors this week, and they have "nut" surfaces for tightening.  First time I've seen that.
 
 
73,
Steve
NN4X


Re: PL259 - how tight?

John McCann
 

Oh yeah, that should do it!

Tight as a tick in a summer campground...

John N7MZ


On 5/2/2019 6:31 AM, Ben Loper wrote:
I like to use a 6 foot length of pipe on the handle to give me some leverage. I have my wife sit on the radio while I put my full body weight on the pipe. That will lower your SWR about 3 points


Re: PL259 - how tight?

Ben Loper <brloper@...>
 

I like to use a 6 foot length of pipe on the handle to give me some leverage. I have my wife sit on the radio while I put my full body weight on the pipe. That will lower your SWR about 3 points


Re: PL259 - how tight?

ab2tc
 

Hi,

Very interesting video. That's a beauty of a connector! I notice that his cable has a double braid and he only folding back the outer layer. The actual connection between the shell and the outer conductor is a compression type connection. The tip is soldered as in a conventional PL259..

AB2TC - Knut


On Thu, May 2, 2019 at 12:31 PM, Steve Sacco wrote:
Actually, I've been installing some beautiful Messi and Paoloni connectors this week, and they have "nut" surfaces for tightening.  First time I've seen that.
 
 
73,
Steve
NN4X


Re: PL259 - how tight?

Ken K6MR
 

Yes, but those are clamp connectors.  The flats are for tightening the connector onto the coax.  Same as a typical Heliax connector.  What I’m talking about is the shell on the UHF male connector.  I’ve never seen one with flats.

 

The other puzzling connector is type N.  Some have flats, some don’t.  When I worked at HP, all of our production line test cables had the flats and were torqued.  Without the flats it’s pretty difficult to tighten it to the correct torque.

 

Ken K6MR

 


From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of Steve Sacco via Groups.Io <nn4x@...>
Sent: Thursday, May 2, 2019 9:31:35 AM
To: elecraft-k3@groups.io
Subject: Re: [Elecraft-K3] PL259 - how tight?
 
Actually, I've been installing some beautiful Messi and Paoloni connectors this week, and they have "nut" surfaces for tightening.  First time I've seen that.


73,
Steve
NN4X


R: [Elecraft-K3] PL259 - how tight?

IK4EWX
 

In 35 years of amateur radio activity, 99% HF, I havent had any problem from PL259, tightening them to the SO239 only with hand and not too hardly.

But I am not easy: I use only AMPHENOL and KINGS PL259, of the soldered kind (not crimped), and when possible the silver plated kind.

I think it is not a problem  of tightening but only of connectors quality.

Those used externally, at the antennas side, are all amalgamated tape covered, so they resist more than 10 years without any probloem.

Ian IK4EWX

 

 

 

Inviato da Posta per Windows 10

 

Da: Ken K6MR
Inviato: giovedì 2 maggio 2019 04:44
A: Elecraft-K3@groups.io
Oggetto: Re: [Elecraft-K3] PL259 - how tight?

 

Here’s a silly question. 

 

All connectors that have torque specs have flats for a torque wrench.  PL259s have no such flats.

 

Doesn’t that mean that the designer(s) intended for the connector to be tightened by hand only?  The knurling on the shell is a clue to me that ‘hand tight’ is correct.  I once looked for a torque spec but didn’t find one.  Perhaps there is one out there.

 

And regarding the single hole mounting jack (which is actually an Amphenol 83-878 and similar):  The jack is supposed to be mounted in a ‘D’ shaped hole, not a round one.  If you punch the proper hole there is no problem with the jack spinning.

 

Ken K6MR

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of ab2tc <ab2tc@...>
Sent: Wednesday, May 1, 2019 3:40:22 PM
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] PL259 - how tight?

 

Hi all,

This is a continuation of a thread on he reflector that started with a totally different subject name that was terminated by Eric. I don't blame him.

But I would like to comment that in my opinion hand tightening of a PL259 onto a SO239 chassis connector is simply not enough, even if you wiggle it to make those teeth align. I always tighten them, not with a pair of regular pliers but with a wrench that I am used to calling a "pump-wrench" (maybe Canada jargon?). It allows the jaws to stay parallel while you adjust the gap by moving the pivot point back and forth. They are readily available at any hardware store. Using this tool the outer ring of the connector moves an appreciable amount without applying much torque and then stops hard. With this I never have any problem with bad coax connections.

BTW, I totally agree with Jim, K9YC, that SO239 connectors mounted with a single big nut makes the equipment junk! Fortunately none of my current equipment have them.

AB2TC - Knut

 


Mail priva di virus. www.avast.com


Re: PL259 - how tight?

Steve Sacco <nn4x@...>
 

Actually, I've been installing some beautiful Messi and Paoloni connectors this week, and they have "nut" surfaces for tightening.  First time I've seen that.


73,
Steve
NN4X


Used k3 value

Barry Bettman
 

Just curious what a used K3 is worth (range low-high $) 
with the 2nd sub rx, general coverage board
10 filters - two each : 2.7k,  8 pole: 1.8k 1000hz 400hz , 250 hz plus one 6k,
Transverter in/out jacks, external 10m preamp,  no auto tuner.

Thanks,

73,

Barry K6ST
Nevada Section Youth Coordinator -  ARRL (American Radio Relay League)


Re: PL259 - how tight?

Ken K6MR
 

Here’s a silly question. 

 

All connectors that have torque specs have flats for a torque wrench.  PL259s have no such flats.

 

Doesn’t that mean that the designer(s) intended for the connector to be tightened by hand only?  The knurling on the shell is a clue to me that ‘hand tight’ is correct.  I once looked for a torque spec but didn’t find one.  Perhaps there is one out there.

 

And regarding the single hole mounting jack (which is actually an Amphenol 83-878 and similar):  The jack is supposed to be mounted in a ‘D’ shaped hole, not a round one.  If you punch the proper hole there is no problem with the jack spinning.

 

Ken K6MR

 


From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of ab2tc <ab2tc@...>
Sent: Wednesday, May 1, 2019 3:40:22 PM
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] PL259 - how tight?
 
Hi all,

This is a continuation of a thread on he reflector that started with a totally different subject name that was terminated by Eric. I don't blame him.

But I would like to comment that in my opinion hand tightening of a PL259 onto a SO239 chassis connector is simply not enough, even if you wiggle it to make those teeth align. I always tighten them, not with a pair of regular pliers but with a wrench that I am used to calling a "pump-wrench" (maybe Canada jargon?). It allows the jaws to stay parallel while you adjust the gap by moving the pivot point back and forth. They are readily available at any hardware store. Using this tool the outer ring of the connector moves an appreciable amount without applying much torque and then stops hard. With this I never have any problem with bad coax connections.

BTW, I totally agree with Jim, K9YC, that SO239 connectors mounted with a single big nut makes the equipment junk! Fortunately none of my current equipment have them.

AB2TC - Knut


PL259 - how tight?

ab2tc
 

Hi all,

This is a continuation of a thread on he reflector that started with a totally different subject name that was terminated by Eric. I don't blame him.

But I would like to comment that in my opinion hand tightening of a PL259 onto a SO239 chassis connector is simply not enough, even if you wiggle it to make those teeth align. I always tighten them, not with a pair of regular pliers but with a wrench that I am used to calling a "pump-wrench" (maybe Canada jargon?). It allows the jaws to stay parallel while you adjust the gap by moving the pivot point back and forth. They are readily available at any hardware store. Using this tool the outer ring of the connector moves an appreciable amount without applying much torque and then stops hard. With this I never have any problem with bad coax connections.

BTW, I totally agree with Jim, K9YC, that SO239 connectors mounted with a single big nut makes the equipment junk! Fortunately none of my current equipment have them.

AB2TC - Knut


Re: KPOD Send M1-M4

Bob Wilson, N6TV
 

Play M1 (tap M1):  SWT21;
Play M2 (tap M2):  SWT31;
Play M3 (tap M3): SWT35;
Play M4 (tap M4):  SWT39;
Swap banks (hold REC):  SWH37;  (Toggles playback between KDVR3 message Bank 1 and KDVR3 message Bank 2)
Halt message playback :  RX;  (Assign this to the Escape key)

For these and other examples, view the source code of my custom K3 scripts for Win-Test logging software, at https://bit.ly/wtscripts (download K3scripts.zip, open .wts source code files with Notepad or text editor).  See also P3scripts.zip, KX2scripts.zip, KX3scripts.zip to get other ideas of useful macros.

73,
Bob, N6TV


On Sat, Apr 27, 2019 at 9:35 AM Bob Elliot <K1RI@...> wrote:
Is there macro that will send the KDVR3 M1-M4?  All I can find a macro that will toggle M1.
73  Bob  K1RI


Re: K3 & FT8 Macro help

Bob Elliot K1RI
 

My FT8, works great. please note the power set to 5w.  You may wish to change that.

ML000;GT002;MN053;DN;DN;UP;UP;MN255;SWT13;SWT13;MD6;DT0;MD$6;DT$0;BW0600;FT1;LK1;VX0;PC005;


KPOD Send M1-M4

Bob Elliot K1RI
 

Is there macro that will send the KDVR3 M1-M4?  All I can find a macro that will toggle M1.
73  Bob  K1RI


Re: "Static" on receive

Gary K9GS
 

As a first step I would try re seating all of the tmp cables and make sure they are fully engaged. 






73,

Gary K9GS

-------- Original message --------
From: Mark Erbaugh <mark.election@...>
Date: 4/23/19 10:55 AM (GMT-06:00)
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] "Static" on receive

I’ve done some testing with my “static” issue.

The noise is there regardless of which IF filter is in use (2.7 kHz or 400 Hz) is used.

I am using a linear PS. The noise is also present when powered by a battery.

My K3 has the sub-receiver. If I turn on the sub-receiver and if both receivers are using the same antenna, the noise goes away (on the main receiver). If the sub-receiver is off or configured to use a different antenna than the main receiver, the noise is there. The noise does not appear on the sub-receiver, regardless of whether it is sharing the main receiver antenna or using the other antenna.

The noise is present with different coax and a different dummy load. The noise is present if nothing is connected to the antenna input.

FWIW, the chassis ground is not connected. The K3 is grounded through the coax connection to the KPA500 and KAT500.

73,
Mark




Re: "Static" on receive

Ware Master
 

I wonder if the tpm connectors on the main receiver need to be cleaned/re seated. You could also re seat the synth board.

On Apr 23, 2019, at 11:56 AM, Mark Erbaugh <mark.election@gmail.com> wrote:

I’ve done some testing with my “static” issue.

The noise is there regardless of which IF filter is in use (2.7 kHz or 400 Hz) is used.

I am using a linear PS. The noise is also present when powered by a battery.

My K3 has the sub-receiver. If I turn on the sub-receiver and if both receivers are using the same antenna, the noise goes away (on the main receiver). If the sub-receiver is off or configured to use a different antenna than the main receiver, the noise is there. The noise does not appear on the sub-receiver, regardless of whether it is sharing the main receiver antenna or using the other antenna.

The noise is present with different coax and a different dummy load. The noise is present if nothing is connected to the antenna input.

FWIW, the chassis ground is not connected. The K3 is grounded through the coax connection to the KPA500 and KAT500.

73,
Mark



Re: "Static" on receive

Mark Erbaugh
 

I’ve done some testing with my “static” issue.

The noise is there regardless of which IF filter is in use (2.7 kHz or 400 Hz) is used.

I am using a linear PS. The noise is also present when powered by a battery.

My K3 has the sub-receiver. If I turn on the sub-receiver and if both receivers are using the same antenna, the noise goes away (on the main receiver). If the sub-receiver is off or configured to use a different antenna than the main receiver, the noise is there. The noise does not appear on the sub-receiver, regardless of whether it is sharing the main receiver antenna or using the other antenna.

The noise is present with different coax and a different dummy load. The noise is present if nothing is connected to the antenna input.

FWIW, the chassis ground is not connected. The K3 is grounded through the coax connection to the KPA500 and KAT500.

73,
Mark


Re: "Static" on receive

HB
 

I had similar issues on 2 radios - one being a K3s and the other a IC-7700 that ended up being a switching power supply on the station desk.  Changed everything to a linear supply and the issue went away.

Grab a battery and test it.   Disconnect everything from the radio that is connected to another device with a power supply (PC, soundcards, amplified speakers, etc) and run your rig on a battery with a mic and antenna connected.

I would also test different pieces of coax and another dummy load if you can - and then make sure the SO-239 on the radio is good and tight.  Is your case ground good and tight?

Hank
K4HYJ




-----Original Message-----
From: "Pete Oesterle" <ve3hoh@...>
To: Elecraft-K3@groups.io
Date: 04/23/19 07:22
Subject: Re: [Elecraft-K3] "Static" on receive

Does it change when you use a different power supply?
I had  a  SAMSUNG  1235  switcher supply   induce  noise into the  LPF   through the close proximity of  the power leads.
Never saw that noise on any other  radio  except my K3. 
Need to shield  the power wires  from the LPFs or run a cleaner PS.

the other thing it sounds like is  similar to the failure of the yaesu Ft857  1st IF filters  developing corrosion.  
Does it happen with all filters   selected?

73  pete  ve3hoh/w3

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of Mark Erbaugh <mark.election@...>
Sent: Monday, April 22, 2019 8:53 PM
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] "Static" on receive
 

When I connect my K3 to a dummy load, I hear a fair amount of "static." It sort of sounds like lightning crashes. In the past, I have heard this with a loose connection on the antenna feed line, but I've checked all the connections. I even connected the K3 directly to a dummy load with a short coax jumper, same static. Is there anything I can look for? A loose connection inside the radio (I built it about 4 years ago)? What else should I check?

73,

Mark


Re: "Static" on receive

Pete Oesterle <ve3hoh@...>
 

Does it change when you use a different power supply?
I had  a  SAMSUNG  1235  switcher supply   induce  noise into the  LPF   through the close proximity of  the power leads.
Never saw that noise on any other  radio  except my K3. 
Need to shield  the power wires  from the LPFs or run a cleaner PS.

the other thing it sounds like is  similar to the failure of the yaesu Ft857  1st IF filters  developing corrosion.  
Does it happen with all filters   selected?

73  pete  ve3hoh/w3


From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of Mark Erbaugh <mark.election@...>
Sent: Monday, April 22, 2019 8:53 PM
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] "Static" on receive
 

When I connect my K3 to a dummy load, I hear a fair amount of "static." It sort of sounds like lightning crashes. In the past, I have heard this with a loose connection on the antenna feed line, but I've checked all the connections. I even connected the K3 directly to a dummy load with a short coax jumper, same static. Is there anything I can look for? A loose connection inside the radio (I built it about 4 years ago)? What else should I check?

73,

Mark


"Static" on receive

Mark Erbaugh
 

When I connect my K3 to a dummy load, I hear a fair amount of "static." It sort of sounds like lightning crashes. In the past, I have heard this with a loose connection on the antenna feed line, but I've checked all the connections. I even connected the K3 directly to a dummy load with a short coax jumper, same static. Is there anything I can look for? A loose connection inside the radio (I built it about 4 years ago)? What else should I check?

73,

Mark

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