We used to use VSB-12STB from Fujitsu (but not available anymore)
These relays are also used in devices from some (large) vendors.
As they are not available anymore we changed to the Fujitsu FTR-K1CK012W
(same ratings).
€ 1,70 Euro (just over 2 dollar each) at Conrad.
This relay looks exactly what I was looking for to remote-switch my 160m
inverted-L to other bands, because it will withstand a lot of voltage. From
the PDF:
High insulation
Insulation distance (between coil and contacts): 10mm min.
Dielectric strength: 5KV
Surge strength: 10KV
73, Mike
Hi Tim
This are the same relay used in the DXE TFS4 4SQ systems?
73,
Jorge
CX6VM/CW5W
-Mensaje original-
De: Topband [mailto:topband-boun...@contesting.com] En nombre de Tim Duffy
Enviado el: jueves, 09 de octubre de 2014 12:27 a.m.
Para: 'Milt -- N5IA'; topband@contesting.com
Asunto:
Hello Jorge,
No. Here is the relay in the DXE TFS4. This relay another good choice for TX
array building.
http://www.dxengineering.com/parts/dxe-rly-hp
73,
Tim K3LR
-Original Message-
From: Jorge Diez - CX6VM [mailto:cx6vm.jo...@gmail.com]
Sent: Thursday, October 09, 2014 7:37 AM
To:
Mike, I would be concerned about using these small relays for non-resonant
antenna switching where the impedance at the switch point may be wildly
away from 50 ohms.
This is the relay I use to switch tuning networks at non-50-ohm points:
Because there are many things that go into relay selection that do not show
on a data sheet, I always dissect and test relays.
I have found 30 amp power relays that overheat at 5 amps at 28 MHz, and
relays that have high contact voltage ratings that make the pole inside the
coil hot with full
So WHAT IS the manufacturers part number of an adequate relay?
Carl
KM1H
- Original Message -
From: Tom W8JI w...@w8ji.com
To: Tim Shoppa tsho...@gmail.com; Mike Waters mikew...@gmail.com
Cc: topband topband@contesting.com
Sent: Thursday, October 09, 2014 9:46 AM
Subject: Re:
So what is the actual manufacturers catalog numberor is that just
another DXE secret?
Since not everyone has DXE products an easy to source item would be
beneficial to the ham community.
Carl
KM1H
- Original Message -
From: Tim Duffy k...@k3lr.com
To: 'Jorge Diez - CX6VM'
Thanks for the advice. I've already calculated the voltage at the feedpoint
of my 160m inverted-L on 80m at 1500w (using EZNEC), and it's only a little
over 3 kV.
I just popped the cover off a little Omron PCB-mounting relay that I forgot
I had, rated at 10 kV. The spacing between the SPDT
Mike Waters mikew...@gmail.com wrote:
I just popped the cover off a little Omron PCB-mounting relay that I forgot
I had, rated at 10 kV.
10 kV between contacts, or 10 kV between a contact and the coil?
73,
Sinisa YT1NT, VE3EA
_
Topband Reflector Archives -
I just popped the cover off a little Omron PCB-mounting relay that I
forgot
I had, rated at 10 kV. The spacing between the SPDT contacts and the coil
actually looks greater than that open-frame relay. I was thinking of
seriesing the contacts on two of these relays, if necessary.
If you series
On Thu,10/9/2014 6:46 AM, Tom W8JI wrote:
Because there are many things that go into relay selection that do not
show on a data sheet, I always dissect and test relays.
Thanks for an excellent exposition of the issues. Now how about the
other half of the question -- part numbers for relays
There is some data on this page:
http://www.w0qe.com/Technical_Topics/small_signal_relays_at_rf.html
I have used the RTD140xx series Schrack/Tyco for years in primarily RTTY
contesting duty at the KW power level - all without fail. But I have not
conducted BDV testing on those relays.
Between contact and coil. I just took 2 photos:
http://www.w0btu.com/files/misc/Omron_relay_G2R-1-E-T130/
On Thu, Oct 9, 2014 at 12:20 PM, shristov shris...@ptt.rs wrote:
Mike Waters mikew...@gmail.com wrote:
I just popped the cover off a little Omron PCB-mounting relay that I
forgot
I
OK Carl and Jim,
I know you want one-part-number-fits-all answers, but I do not think that is
possible. There are tens of thousands of relays and dozens of applications.
I am afraid telling people what to do in no uncertain terms by specifying a
part number often winds up being wrong over
Ahhh yes. Thanks. I didn't think of that. :-)
73, Mike
www.w0btu.com
On Thu, Oct 9, 2014 at 12:33 PM, Tom W8JI w...@w8ji.com wrote:
... I was thinking of seriesing the contacts on two of these relays, if
necessary.
If you series the contacts the voltages across open contacts divides by
A potential problem with that relay is that it is not sealed. Moisture
could get in, condense, and freeze. And if ice forms in the wrong place,
the relay might not operate. I've had that happen before, and during a 160
contest.
73, Mike
www.w0btu.com
On Thu, Oct 9, 2014 at 1:17 PM, Mike Waters
On Thu,10/9/2014 11:18 AM, Tom W8JI wrote:
I know you want one-part-number-fits-all answers, but I do not think
that is possible.
That's your assumption, but certainly not mine. What I think most of us
would appreciate are known good products for specific (or define ranges
of) applications.
On Thu,10/9/2014 11:18 AM, Tom W8JI wrote:
I know you want one-part-number-fits-all answers, but I do not think that
is possible.
That's your assumption, but certainly not mine. What I think most of us
would appreciate are known good products for specific (or define ranges
of)
- Original Message -
From: Jim Brown j...@audiosystemsgroup.com
To: topband@contesting.com
Sent: Thursday, October 09, 2014 3:37 PM
Subject: Re: Topband: TX relays
On Thu,10/9/2014 11:18 AM, Tom W8JI wrote:
I know you want one-part-number-fits-all answers, but I do not think that
Carl, et al,
You have valid points. I have resorted, for example to making my own high
power handling T/R relays using Kilovac, Jennings, and other brands of
vacuum relays I can find, with my mill and lathe. This is a part of ham
radio that I thoroughly enjoy !! (I do use the N-Style female
Between contact and coil. I just took 2 photos:
http://www.w0btu.com/files/misc/Omron_relay_G2R-1-E-T130/
This is where dissection helps. We can see, from the pictures, that relay is
likely a good relay.
1.) It has wide smooth current paths. It does not have wire leads
2.) It has good
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