[AMPS] VHF AMP
Martin Gary
n3hrt@us.hsanet.net
Fri, 20 Nov 1998 08:20:18 -0500
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Hello,
I have a couple of 8877 VHF amplifiers. They will put out 1500 watts and =
are tunable from 135-174 MHz.
I would be willing to trade one for a NICE HF amp (160-10 MTRS).=20
Here's the scoop on the VHF amps:
I acquired two of them. They came out of some high power transmitters. =
The transmitters had a
low power exciter, a medium power amp and a high power amp. A friend =
wanted the medium
power amps (4CX250) and I got the high power ones. I have one on the air =
now. It works very
nicely. Both of these amps were on the air and working when taken out of =
service. They were
not used very often so there is not a lot of time on the tubes.
Here's the catch:
The amp requires some rewiring. Since it came out of a transmitter, it =
has interlocks that went
to other units that aren't there anymore (the med power amp and the =
exciter), a time delay relay
needs to be installed (there was one integrated into the exciter) and it =
needs T/R relays installed.
Also a small 12-14 volt power supply needs to be installed in the power =
supply cabinet to run the
power relays witch are integrated into the interlock wiring. I set one =
of them up in a couple of
days without much difficulty. I have all of the parts needed to get it =
on the air. The time delay
relay is a very nice one with a dial on the top to select the delay. The =
coaxial relays are
Dowkey.
This is a very heavy duty amp. The power supply cabinet weighs about 150 =
lbs. Its says 200 on
the front of the unit, but I don't think it weighs quite that much. It =
requires a 19 inch rack mount
cabinet (which I don't have).=20
As you can see, it needs a good home.... Its obvious that it can't be =
shipped. I live in Southern
Maryland (Lexington Park) and would be willing to meet someone half way =
as long as its a one
day trip.=20
If posting stuff for trade on this reflector is not acceptable, please =
email me privately.
Thanks for reading this.
Martin Gary - N3HRT
n3hrt@us.hsanet.net
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<DIV><FONT color=3D#000000 size=3D2>Hello,</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I have a couple of 8877 VHF =
amplifiers. They=20
will put out 1500 watts and are tunable from 135-174 MHz.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2>I would be willing to trade one for =
a NICE HF=20
amp (160-10 MTRS). </FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Here's the scoop on the VHF =
amps:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I acquired two of them. They came =
out of some=20
high power transmitters. The transmitters had a<BR>low power =
exciter, a=20
medium power amp and a high power amp. A friend wanted the =
medium<BR>power amps=20
(4CX250) and I got the high power ones. I have one on the air now. It =
works=20
very<BR>nicely. Both of these amps were on the air and working when =
taken out of=20
service. They were<BR>not used very often so there is not a lot of time =
on the=20
tubes.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2><BR>Here's the catch:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>The amp requires some rewiring. =
Since it came=20
out of a transmitter, it has interlocks that went<BR>to other =
units that=20
aren't there anymore (the med power amp and the exciter), a time delay=20
relay<BR>needs to be installed (there was one integrated into the =
exciter) and=20
it needs T/R relays installed.<BR>Also a small 12-14 volt power =
supply=20
needs to be installed in the power supply cabinet to run the<BR>power =
relays=20
witch are integrated into the interlock wiring. I set one of them =
up in a=20
couple of<BR>days without much difficulty. I have all of the parts =
needed=20
to get it on the air. The time delay<BR>relay is a very nice one with a =
dial on=20
the top to select the delay. The coaxial relays=20
are<BR>Dowkey.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>This is a very heavy duty amp. The =
power supply=20
cabinet weighs about 150 lbs. Its says 200 on<BR>the front of the unit, =
but I=20
don't think it weighs quite that much. It requires a 19 inch rack=20
mount<BR>cabinet (which I don't have). </FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>As you can see, it needs a good =
home.... Its=20
obvious that it can't be shipped. I live in Southern<BR>Maryland =
(Lexington=20
Park) and would be willing to meet someone half way as long as its a =
one<BR>day=20
trip. </FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>If posting stuff for trade on this reflector is not=20
acceptable, please email me privately.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Thanks for reading =
this.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Martin Gary - N3HRT<BR><U><FONT =
color=3D#0000ff><A=20
href=3D"mailto:n3hrt@us.hsanet.net">n3hrt@us.hsanet.net</A></FONT></U></F=
ONT></DIV>
<DIV> </DIV></BODY></HTML>
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