On Tue, 24 Oct 2006 17:15:29 -0700, Jay in the Mojave wrote:

Hello All:

Yeah really! My neighbor set his K40 on fire with about 250 watts, and
wanted another new one as they had a guarantee on them to be replaced. I
went with him to the CB shop down town. The lady threw the K40 antenna
into a large box with even more K40's in it! TILT! And said it will be a
while before I get more in!

I said give the K40 back and we will fix it. The 130 pF capacitor had
fried inside the base of the antenna. It was a common mass produced
cheapie capacitor. I replaced the burnt one with 2 each 260 pF caps
wired in parallel to make the 130 pF value.


I thought caps in parallel acted like resisitor in series? That would make it
520 instead of 130. But dman, now you got me thinking. I am going to have to go
look it up. I don't recall for sure.

http://www.play-hookey.com/dc_theory...apacitors.html



These where Mica 500 VDC
Capacitors. It was a real Bear it get all put back together. We also
replaced the RG-58C CB cheapie coax with RG142 Teflon coax as this will
handle more power safely than the unknown mass produced cheapie coax.

Besides who wants to pay 25 dollars a pop for a transistor for unknown
coax catching on fire?? I sure don't especially with a 8 pill amp!

The K40 worked great after the mod. A few turns of black tape around the
burnt plastic base assebly and some High Gloss Black Paint make it look
real spif a row, Ten-4! We painted on it K40-1 Can do easy G.I.

Jay in the Mojave


Where is that cap located? I tossed my K40. One problem was the whipw as too
rigid.

Vinnie S.

On Tue, 24 Oct 2006 00:38:31 -0400, "if you say so" wrote:


"Vinnie S." wrote in message

You might want to go directly to the battery. As far as the K40. It's
excellent,so long as you don't run power. I cooked mine. If you want to
run power, get the Wilson 1000. If you get 100W SSB, I would get the
Wilson 1000. You are close to max with the K40. I owned both, and thought
they were equally effective, except for the power handling. Vinnie S.

The K40 is rated to 500watts.


Not according to them. They said 150 watts. And I blew mine out with far less.

Vinnie S.

Vinnie S. wrote:
On Tue, 24 Oct 2006 00:38:31 -0400, "if you say so"
wrote:


"Vinnie S." wrote in message

You might want to go directly to the battery. As far as the K40. It's
excellent,so long as you don't run power. I cooked mine. If you want
to run power, get the Wilson 1000. If you get 100W SSB, I would get
the Wilson 1000. You are close to max with the K40. I owned both, and
thought they were equally effective, except for the power handling.
Vinnie S.

The K40 is rated to 500watts.

Not according to them. They said 150 watts. And I blew mine out with far
less.

Vinnie S.

It was prolly that damn roger beep!

--
http://NewsReader.Com/

"john" wrote...
the radio I'm looking at uses 8 amps on am and 15 amps on
ssb, on transmit.
I will wire the thing into the circuit when I get it to the motor home
but I would like to use it with a cigarette lighter plug, in the auto en
route.

I would not take the power from the lighter plug.
I don't know how good they make the plugs in America, but I doubt that they are perfect
connections.
Any poor connections where the contacts meet will give a resistance, which will drop voltage
and create heat. The voltage drop will vary with power output, so your supply to the radio
could be bouncing up and down to your voice on SSB... which may cause warbling or other
distortion.
Apart from any radio problems, you have to consider the heat being created in the socket and,
possibly, in the wires to that socket.


Regards,
Peter.
http://www.citizensband.radiouk.com/