There are nearly always some open frame relays, like we used to use for
antenna changeover, at hamfests.
The ceramic ones would do fine at 100W, or much more. Even 600 ohm line
doesn't have extreme voltages, under 1KV at a KW.
I can't find any on Google, but they are around, just a few $ each.
WL
-----Original Message-----
From: towertalk-request@contesting.com
Sent: Monday, September 14, 2015 9:51 PM
To: towertalk@contesting.com
Subject: TowerTalk Digest, Vol 153, Issue 40
Send TowerTalk mailing list submissions to
towertalk@contesting.com
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.contesting.com/mailman/listinfo/towertalk
or, via email, send a message with subject or body 'help' to
towertalk-request@contesting.com
You can reach the person managing the list at
towertalk-owner@contesting.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of TowerTalk digest..."
Today's Topics:
1. Re: G-2800DXA Resistance readings (john@kk9a.com)
2. Re: G-2800DXA Resistance readings (Mark Pride)
3. Looking for good source of 20 ft mast (Stephen Davis)
4. Re: Looking for good source of 20 ft mast (Matthew King - KK4CPS)
5. Re: Looking for good source of 20 ft mast (john@kk9a.com)
6. Re: Looking for good source of 20 ft mast (Gene Smar)
7. relays for remote ladder line switch (Rik van Riel)
----------------------------------------------------------------------
Message: 1
Date: Mon, 14 Sep 2015 06:41:24 -0500
From: "john@kk9a.com" <john@kk9a.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] G-2800DXA Resistance readings
Message-ID: <928b0d53747179eee9cb35e5e42618ab.squirrel@www11.qth.com>
Content-Type: text/plain;charset=iso-8859-1
I think D. Drake is correct.
http://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=104&encProdID=E0526A9F285ECCF36F75CC3FEC992990&DivisionID=65&isArchived=0
Also as he mentioned the outdoor connector is sensitive moisture and it
would be the first thing to check. The rubber boot does little to stop
ingress. When I had G-2800DXA rotators I sealed the boot with silicone
sealant.
John KK9A
To: towertalk@contesting.com
Subject: Re: [TowerTalk] G-2800DXA Resistance readings
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sun, 13 Sep 2015 16:36:38 -0700
On Sun,9/13/2015 3:30 PM, D. Drake wrote:
Pins 1, 2 and 3 go to the 500 ohm position pot
with pin 2 being the wiper. Also pin 3 is
grounded at the rotor. So my measured resistance
from pin 1 to 3 was 506 ohms. Pin 1 to 2 was 288
ohms and pin 2 to 3 was 221 ohms with the rotor at
45 degrees at the full CCW position pin 1-2 was
502 ohms and at the CW stop pin 1-2 was 70 ohms.
Pins 4 and 5 go to the motor and with the rotor
not at a mechanical stop the resistance was 12
ohms
Hmmmm. That's exactly the opposite of the schematic I remember seeing
online, as well as opposite of their smaller rotator (GXE1000?). Pins 1
and 2 are the motor, 3, 4, and 5 is the position pot.
73, Jim K9YC
------------------------------
Message: 2
Date: Mon, 14 Sep 2015 11:55:19 +0000 (UTC)
From: Mark Pride <mpridesti@yahoo.com>
To: "jim@audiosystemsgroup.com" <jim@audiosystemsgroup.com>,
"towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] G-2800DXA Resistance readings
Message-ID:
<1128435114.2080313.1442231719672.JavaMail.yahoo@mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
I concur with Dale's description.
G2800DXA model (with Cinch connector on control box)? - Also the same for
the G1000DXA model.
1,2,3 are for the potentiometer
4,5 are the motor and 6 relates to the stops.
I?am happy to scan and supply the schematic.
Also note:? I have found their version control is very poor.? Moving from
Cinch connectors to?Molex; FT1000D - always send the original manual when
having it repaired as these radios had changes?that were not well?documented
(but I digress).?Regards, Mark, K1RX ? ????
From: Jim Brown <jim@audiosystemsgroup.com>
To: towertalk@contesting.com
Sent: Sunday, September 13, 2015 7:36 PM
Subject: Re: [TowerTalk] G-2800DXA Resistance readings
On Sun,9/13/2015 3:30 PM, D. Drake wrote:
Pins 1, 2 and 3 go to the 500 ohm position pot
with pin 2 being the wiper.? Also pin 3 is
grounded at the rotor.? So my measured resistance
from pin 1 to 3 was 506 ohms.? Pin 1 to 2 was 288
ohms and pin 2 to 3 was 221 ohms with the rotor at
45 degrees at the full CCW position pin 1-2 was
502 ohms and at the CW stop pin 1-2 was 70 ohms.
?
Pins 4 and 5 go to the motor and with the rotor
not at a mechanical stop the resistance was 12
ohms
Hmmmm. That's exactly the opposite of the schematic I remember seeing
online, as well as opposite of their smaller rotator (GXE1000?). Pins 1
and 2 are the motor, 3, 4, and 5 is the position pot.
73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 3
Date: Mon, 14 Sep 2015 13:33:37 -0400
From: Stephen Davis <sdavis@davisrf.com>
To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: [TowerTalk] Looking for good source of 20 ft mast
Message-ID: <8E7EC06E-97C5-4C3E-8732-41477E13353F@davisrf.com>
Content-Type: text/plain; charset=us-ascii
Hello all
Specs : 20 ft. 2" O.D. .50" wall chrome moly
Yep, .5 " !
Tnx a lot. 73. Steve. K1PEK
Steve Davis
Senior RF Cable Design Engr.
& Founder
DAVIS RF Co. a division of
Orion Wire Co., Inc.
Tel: 978-369-1738
ALSO: Davis Rope & Cable Assembly Co., LLC:
Design Engrs, Distribution
------------------------------
Message: 4
Date: Mon, 14 Sep 2015 16:48:51 -0400
From: Matthew King - KK4CPS <KK4CPS@gmail.com>
To: Stephen Davis <sdavis@davisrf.com>
Cc: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Looking for good source of 20 ft mast
Message-ID:
<CAKs+UskMdpdpEjry4xeHL-hAQJZnJRvm=43wBWv0T+3qj9=E4w@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
I would think your local(ish) steel yard is probably your best bet for that.
That's gonna be a beast! What's it going in/on? What's going on it to
require such a specification, just for curiosity's sake?
73 es GL
Matt
KK4CPS
On Mon, Sep 14, 2015 at 1:33 PM, Stephen Davis <sdavis@davisrf.com> wrote:
Hello all
Specs : 20 ft. 2" O.D. .50" wall chrome moly
Yep, .5 " !
Tnx a lot. 73. Steve. K1PEK
Steve Davis
Senior RF Cable Design Engr.
& Founder
DAVIS RF Co. a division of
Orion Wire Co., Inc.
Tel: 978-369-1738
ALSO: Davis Rope & Cable Assembly Co., LLC:
Design Engrs, Distribution
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 5
Date: Mon, 14 Sep 2015 18:10:41 -0400
From: <john@kk9a.com>
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] Looking for good source of 20 ft mast
Message-ID: <004301d0ef3a$3225e3f0$9671abd0$@com>
Content-Type: text/plain; charset="us-ascii"
That is probably a difficult wall thickness to find and you may have to go
to solid 4130 if you insist on using that diameter and need that much
strength. 3" mast is stronger per pound and so much nicer to climb and clamp
to. I have not used a 2" mast in decades.
John KK9A
To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: [TowerTalk] Looking for good source of 20 ft mast
From: Stephen Davis <sdavis@davisrf.com>
Date: Mon, 14 Sep 2015 13:33:37 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Hello all
Specs : 20 ft. 2" O.D. .50" wall chrome moly
Yep, .5 " !
Tnx a lot. 73. Steve. K1PEK
Steve Davis
Senior RF Cable Design Engr.
& Founder
DAVIS RF Co. a division of
Orion Wire Co., Inc.
Tel: 978-369-1738
ALSO: Davis Rope & Cable Assembly Co., LLC:
Design Engrs, Distribution
------------------------------
Message: 6
Date: Mon, 14 Sep 2015 20:29:35 -0400
From: "Gene Smar" <ersmar@verizon.net>
To: "'Stephen Davis'" <sdavis@davisrf.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Looking for good source of 20 ft mast
Message-ID: <001101d0ef4d$9ca56670$d5f03350$@verizon.net>
Content-Type: text/plain; charset=US-ASCII
Steve:
I bought my 2"X1/4" CM mast from Special Metals, Inc. 6406 South
Eastern Oklahoma City, OK 73149; Sales: Joe Varva 800-727-7177. That was
in 2001 so neither the company nor Joe nor the number might be around
anymore. Good luck.
73 de
Gene Smar AD3F
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
Stephen Davis
Sent: Monday, September 14, 2015 1:34 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Looking for good source of 20 ft mast
Hello all
Specs : 20 ft. 2" O.D. .50" wall chrome moly
Yep, .5 " !
Tnx a lot. 73. Steve. K1PEK
Steve Davis
Senior RF Cable Design Engr.
& Founder
DAVIS RF Co. a division of
Orion Wire Co., Inc.
Tel: 978-369-1738
ALSO: Davis Rope & Cable Assembly Co., LLC:
Design Engrs, Distribution
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 7
Date: Mon, 14 Sep 2015 21:51:27 -0400
From: Rik van Riel <riel@surriel.com>
To: towertalk@contesting.com
Subject: [TowerTalk] relays for remote ladder line switch
Message-ID: <55F7799F.1000603@surriel.com>
Content-Type: text/plain; charset=utf-8
Hello,
I am considering building a remote ladder line switch using W199X-12
relays, which are open frame DPDT with 1600V breakdown voltage between
open contacts, 2200V between poles and coil/contact.
I run with 100W power.
Does anybody have opinions on relays like those, experience with them,
or good experiences with other relays that you think I should
consider instead?
I am looking at switching between two lazy H antennas (one east/west,
the other north/south) and maybe some doublets for lower bands.
The plan is to have each antenna switched either to a 4:1 balun, or
to ground. Would it make more sense to leave the unused antennas
ungrounded, or discharge static through 1M resistors?
thank you,
Rik AB1KW
--
All rights reversed.
------------------------------
Subject: Digest Footer
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
End of TowerTalk Digest, Vol 153, Issue 40
******************************************
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|