Connecting a TS-940S to an SB-200
tom
Harbach mods (soft key, soft start, etc.) When the mods are finished I will
be hooking the amp up to my Kenwood TS-940S. This will be my first
experience with an amp, and I'm a little confused about the proper
connections to be made. (The 940S manual has instructions specifically for
their own linear, and the diagram of the REMOTE pinout is unclear to me.)
The SB-200 has an ALC out jack. I assume, from what I can see, that the
center conductor of this jack goes to PIN 6 of the 940, and the outer
conductor (ground) goes to PIN 2. Correct?
The SB-200 has an ANT RELAY jack. I'm not quite sure which pins I should
connect this to. (The guy I bought the amp from said to just use a foot
switch and press it simultaneously as I key the mic!!!!)
Any help from 940S owners who have connected their rigs to the SB-200 (or
other non-Kenwood amps) would be appreciated.
Tom
N2LDE
Keith A White
The back of the amp has four jacks that you should be looking at.
1) Input - RCA Phono plug
2) Output - SO259? female of the PL259.
3) ALC input - from radio, phono plug
4) amp relay - from radio, phono plug.
I hooked my ACC from the radio using a DIN-5 plug into two phono plugs.
These plugs then plugged into the back panel of the amp.
My setup works great!
The hard part was trying to see how my ACC plug interfaced with the amp. Trying
to find out the correct pinouts.
Keith, N5RVZ
John
Ron Rossi
Don't be shaken about being confused how to hook up the amplifier. The
ham that mentioned the footswtich is not way out to lunch though. That
is an option. We have done that at field day whne the T/R relay quit in
a TS-830 (actually just used a piece of hooup wire to gnd). What you
need to do is connect the the transmit relay from the rig to the relay
input on the amp. The footswitch the other ham suggested takes the place
of the relay in the rig. The relay in the rig is keyed from PTT. I am
not 100% sure, but most amplifiers expect to see the relay input
grounded to activate it (some, notably the Collins 30L-1 have
significant voltages at that pin however) Connect the normally open
relay contact from the 940 to the amplifier relay input. Connect the
common from that same relay output to the shield of the amp relay input.
You do not NEED to hook up the ALC line. The ALC (auto level control) is
a voltage fed back from the amplifier to the radio to limit the drive to
the amp when a predetermined limit is reached. The problem is the
voltage that is returned and which is expected varies between amplifier
and rig designs. Bottom line is that if you feed a linear and unclipped
signal into the amp and follow the tuning instructions you will be all
set.
--
73 de KK1L...ron (kk...@arrl.net) <><
Ron Rossi H/P SRAM Engineering -- IBM Microelectronics
QTH: Jericho, Vermont
My page: http://www.qsl.net/kk1l
--
73 de KK1L...ron (kk...@arrl.net) <><
Ron Rossi H/P SRAM Engineering -- IBM Microelectronics
QTH: Jericho, Vermont
My page: http://www.qsl.net/kk1l
tom
Keith A White wrote in message <37A8F137...@swbell.net>...
>The hard part was trying to see how my ACC plug interfaced with the amp.
Trying
>to find out the correct pinouts.
Keith,
That is what I'm trying to solve, and despite some others sarcastic
comments, the manual is not clear on the pinout connections. I was just
hoping someone here had a similar setup.
Thanks for your sincere suggestions....
Tom
Gary McAdams
John <w3...@arrl.net> wrote in message
news:37a8e954....@netnews.att.net...
> and you passed your ham ticket?
>
> On Wed, 4 Aug 1999 20:24:46 -0400, "tom" <tso...@injersey.com> wrote:
>
> >I bought an SB-200 a few months ago and am in the process of installing
some
> >
> >Tom
> >N2LDE
> >
John,
Could you please take time to explain to the group just how your one-liner
reply was
supposed to help?
Tom was asking for help with equipment interconnections, on
rec.radio.amateur.EQUIPMENT.
What better place to ask?
Personally, I have a TS-940s/AT, and the manual is not too forthcoming on
the subject of
non-Kenwood connections. I know that the 940 keying relay can probably pull
the SB-200
into transmit and keep it there, but since I'm not sure, I remain silent,
keeping my ignorance
to myself.
Possibly you took courses of study that made you an expert on all kinds and
types of amateur radio gear?
If so, congratulations.. please share with us, and if not, please spare us
the snotty one-line reply, OK?
Geezus!
Gary
(and yes, I am licensed...)
Edward L. Dowdy
relay in the 940 to a crisp. There is -120V on the keying circuit of an
unmodified SB-200.
tom <tso...@injersey.com> wrote in message
news:7oak88$4p$1...@nw001t.infi.net...
> I bought an SB-200 a few months ago and am in the process of installing
some
John Cramond
<eld...@net66.com> writes
>Get the SK-200 mod from Harbach. If you don't I suspect you'll burn the
>relay in the 940 to a crisp. There is -120V on the keying circuit of an
>unmodified SB-200.
>
any problem. I have used the SB-200 with the TS830 for a few years, and
lately with the TS870 for a couple of years. I believe that the Yaesu
relay is not quite so tolerant. Not certain about Icom.
--
John Cramond - GM4NHI
<jo...@gm4nhi.demon.co.uk>
Home Page - X7 Review: www.gm4nhi.demon.co.uk
Gary Coffman
>In article <GGVq3.4288$l53.1...@typ12.nn.bcandid.com>, Edward L. Dowdy
><eld...@net66.com> writes
>>Get the SK-200 mod from Harbach. If you don't I suspect you'll burn the
>>relay in the 940 to a crisp. There is -120V on the keying circuit of an
>>unmodified SB-200.
>>
>The relay in Kenwood equipment would appear to handle the 120V without
>any problem. I have used the SB-200 with the TS830 for a few years, and
>lately with the TS870 for a couple of years. I believe that the Yaesu
>relay is not quite so tolerant. Not certain about Icom.
The Icom will throw up big time. You need an external relay with the
Icom rigs.
Gary
Gary Coffman KE4ZV | You make it |mail to ke...@bellsouth.net
534 Shannon Way | We break it |
Lawrenceville, GA | Guaranteed |
Laurence D. 'Mike' Hammer
>That is what I'm trying to solve, and despite some others sarcastic
>comments, the manual is not clear on the pinout connections. I was just
>hoping someone here had a similar setup.
>Thanks for your sincere suggestions....
Just ignore the critics and sarcastics. They're the ones driving down our
great hobby. It's up to the rest of us to be the good guys that keep amateur
radio afloat in modern times. With some of the attitudes on the bands I'm sort
of surprised there's still so much interest in hamming!
I'm updating an Ameritron AL-84 amp with more modern tubes, and which also uses
an external relay switch, for mating to my TS-930. We're in the same boat.
Thanks for asking the question for me, I'm really into the replies!
73, Mike KC2EAL
P.S. Maybe we should make people pass exams on computer architecture, use and
programming before they could post to the Internet. That would even the
playing field and stop a lot of the criticisms. For example, "What offset
amount in assembler causes a jump in the program bug of exactly 14 bytes for an
IBM PC-architectured motherboard?" (roughly equivalent question to effective
bandwidth of CW) Or, "What's the minimum practical free memory size for the
program launch subroutine used by the Microsoft C++ version 6 compiler?" Oh,
the havoc we could wreak... I would settle for required netiquette lessons!
--
L. Mike Hammer
ld...@cornell.edu
Programmer/Analyst III
Arts College Dean's Office
Cornell University
Ithaca, NY