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You also need to be aware of the high keying voltage from the sb200, =
It's about -120 volts dc. Can your exciter handle that?? if not, you'll =
need a "soft key" ckt. like the one from harbach electronics. I have no =
connection with them except that's where I buy some parts!!!!! that =
unit is about $ 18-20 and allows your exciter to see only about 1 volt =
or so at very low current and is completely safe for any modern =
exciter!!
carl / kz5cap.s. if pin 2 on your exciter is supposed to be ground it =
must be defective, since you can key with one wire on the shell of your =
connector!!!!
----- Original Message -----=20
From: Mike=20
To: Barry Schieferstein ; amps@contesting.com=20
Sent: Tuesday, November 27, 2001 10:14 PM
Subject: Re: [AMPS] TS-940 and SB-200
Hi Barry,=20
Try connecting a shorting plug to the relay control input on the =
SB-200. If the amp
is working properly, you should hear the T/R relay close, and see an =
indication
of idling current on the plate current meter when you connect the =
shorting plug. If=20
nothing happens when you do this, then there is a problem in the amp. =
If the=20
T/R relay closes, and you see idling current, then you can apply drive =
from the=20
exciter to see if the amp works (make sure you remove the RF drive =
from the=20
exciter before you unkey the amp).=20
73 de Mike, W4EF................
----- Original Message -----=20
From: Barry Schieferstein=20
To: amps@contesting.com=20
Sent: Tuesday, November 27, 2001 6:24 PM
Subject: [AMPS] TS-940 and SB-200
Having read everything I can find here and elsewhere about hooking =
up a TS-940 to a SB-200 I have decided to ask fo help. The remote =
output of the 940 uses pin 6 for ALC, pin 4 for the amp relay, and pin 2 =
as the ground. With this hookup I get no closure or voltage between =
pins 2 and 4. I do get closure between 4 and the outside of the din =
connector. When hooked up to the SB-200 there does not seem to be any =
keying (ie. no plate current). There is HV on the amp and everything =
else works on the 940. The amp was supposedly in working order when =
taken off-line years ago. Any suggestions as to where to start looking?
Thanks,
Barry KW8W
barrys@core.com
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<META http-equiv=3DContent-Type content=3D"text/html; =
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>You also need to be aware of the high =
keying=20
voltage from the sb200, It's about -120 volts dc. Can your exciter =
handle that??=20
if not, you'll need a "soft key" ckt. like the one from harbach =
electronics. I=20
have no connection with them except that's where I buy some =
parts!!!!! =20
that unit is about $ 18-20 and allows your exciter to see only about 1 =
volt or=20
so at very low current and is completely safe for any modern=20
exciter!!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> carl / kz5cap.s. if pin 2 =
on your=20
exciter is supposed to be ground it must be defective, since you can key =
with=20
one wire on the shell of your connector!!!!</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3DW4EF@dellroy.com href=3D"mailto:W4EF@dellroy.com";>Mike</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3DBarryS@Core.Com=20
href=3D"mailto:BarryS@Core.Com";>Barry Schieferstein</A> ; <A=20
title=3Damps@contesting.com=20
href=3D"mailto:amps@contesting.com";>amps@contesting.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, November 27, =
2001 10:14=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [AMPS] TS-940 and=20
SB-200</DIV>
<DIV><BR></DIV>
<DIV>
<DIV><FONT face=3DArial size=3D2>Hi Barry, </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Try connecting a shorting plug to the =
relay=20
control input on the SB-200. If the amp</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>is working properly, you should hear =
the T/R=20
relay close, and see an indication</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>of idling current on the plate =
current meter when=20
you connect the shorting plug. If </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>nothing happens when you do this, =
</FONT><FONT=20
face=3DArial size=3D2>then there is a problem in the amp. If the=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>T/R relay closes, and you see idling =
current,=20
then you can apply drive from the </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>exciter to see if the amp works (make =
sure you=20
remove the RF drive from the </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>exciter before you unkey the amp). =
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>73 de Mike,=20
W4EF................</FONT></DIV></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3DBarryS@Core.Com href=3D"mailto:BarryS@Core.Com";>Barry=20
Schieferstein</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Damps@contesting.com=20
href=3D"mailto:amps@contesting.com";>amps@contesting.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, November 27, =
2001 6:24=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [AMPS] TS-940 and =
SB-200</DIV>
<DIV><BR></DIV>
<DIV><FONT size=3D2>
<DIV><FONT size=3D2>Having read everything I can find here and =
elsewhere about=20
hooking up a TS-940 to a SB-200 I have decided to ask fo help. =
The=20
remote output of the 940 uses pin 6 for ALC, pin 4 for the amp =
relay, and=20
pin 2 as the ground. With this hookup I get no closure or =
voltage=20
between pins 2 and 4. I do get closure between 4 and the =
outside of=20
the din connector. When hooked up to the SB-200 there does not =
seem to=20
be any keying (ie. no plate current). There is HV on the amp =
and=20
everything else works on the 940. The amp was supposedly in =
working=20
order when taken off-line years ago. Any suggestions as to =
where to=20
start looking?</FONT></DIV>
<DIV><FONT size=3D2>Thanks,</FONT></DIV>
<DIV><FONT size=3D2>Barry KW8W</FONT></DIV>
<DIV> </DIV>
<DIV><A=20
=
href=3D"mailto:barrys@core.com";>barrys@core.com</A></DIV></FONT></DIV></B=
LOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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