"The Magnum" wrote in message
...
Remember, connect a busy system as follows,
CB - Pre-amp - SWR meter - Linear - Antenna

Why would you put any SWR meter before the Amp?

Im suprised you question that. What would you think will happen if you
shove
150w upwards through a cheap basic SWR meter?

If your SWR can't handle the power output of your amp, Do you think
putting it there would give you an accurate reading of the SWR on your
antenna?


Simple, If you are running power, don't buy a cheap SWR meter. It's good to
have the meter after the amp. You will need to see the reflected power in
case the antenna is rejecting harmonics. At which point you should cease
operation.

No but its going to be more realistic then it pinging off the scale with
extra power going through it. If its left in line it will also cause much
greater interference than being before the linear. Think about it.

I could care less what SWR the amp is showing my radio in most cases. I'll
check that very occasionally. I DO CARE about overall reflected power from
the antenna. This is quite important!

Chad

"The Magnum" wrote in message
...
"Chad Wahls" wrote in message
...

"The Magnum" wrote in message
...
Vinnie S." wrote in message
...
On Tue, 29 Nov 2005 18:14:31 -0000, "The Magnum"
wrote:


"Vinnie S." wrote in message
.. .
On 28 Nov 2005 20:36:15 -0800, "Programbo"
wrote:

What does everyone think is the going rate for replacing a blown
final
(Output transistor) in a typical CB radio at a repair shop?


If it is the 1969, the part is relatively cheap. The labor is the
killer.
I
would think it would be in the area of $50.

Vinnie S.

%*&$ing hell. "how much". 1969's are getting harder to source now
since
they
have ceased production of them. The 2SC2078 10w transistor is a
commonly
used one in the straight 40 type rigs. Even so, id not charge any
more
than
$25 unless there was a lot more involved than a simple tranny
change...but
then again, im not a shop.

Regards,
Graham


Correct, but I think he was getting ripped off, hence $50. I think
there
is a
better replacement than the 1969, but don't recall what it was. In any
case, I
would do it myself.

Vinnie S.

Me too. Its a pretty simple job as long as you can use a soldering iron
and
you have just an inkling of common sense. The New replacement for the
1969
is an ERF-2030 which is rated at 25w. It might need companion parts
depending on the set up. There's more info on this on the front page of
my
website.

Regards,
Graham
--


It will need support components unless it is going into a FET based radio
with biasing tactics in place. Also note that the ERF2030 is a IRF520
available for quite cheap, the schematic for the support components is
out
there. I am going to start expierimenting next week! I'll let you know
how
it turns out!

Chad

Hi Chad. I for one will be interested in your findings. Let us know.

Regards,
Graham

--
_._. _... ._. ._ _.. .. _ _ _

Radio is only a Hobby. Don't let it rule your life...

73's - Graham (www.open-channel.co.uk)



YGM

Chad

//snip//
Why would we trust your WEB page?

You dont have to trust it. Its a pointer. If your interested do a
websearch
and clarify anything you feel unsure of.

You have this statement on your WEB page:

Remember, connect a busy system as follows,
CB - Pre-amp - SWR meter - Linear - Antenna

Why would you put any SWR meter before the Amp?

Im suprised you question that. What would you think will happen if you
shove
150w upwards through a cheap basic SWR meter?

Not the point of my question, what SWR are you measuring inserting it
there?

Inserting it there you can measure the SWR of the antenna/feed and not worry
about leaving it inline and firing up the linear which might cause damage to
it. You can check the SWR before powering up the linear to make sure its
somewhere satisfactory. Its not going to be exact by any means but it will
give a reasonable guide. Also im not referring to high quality equipment,
its aimed at the beginner with basic gear to give them a broad idea.
Obviously as you get more technical you will have your own ideas. Dont
forget the other option directly under that referred to statement which was
for the more higher rated SWR/PWR meter.. ie CB pre-amp - Linear - Swr/Pwr
meter - Antenna.

If your SWR can't handle the power output of your amp, Do you think
putting it there would give you an accurate reading of the SWR on your
antenna?

No but its going to be more realistic then it pinging off the scale with
extra power going through it. If its left in line it will also cause much
greater interference than being before the linear. Think about it.


I have thought about it, Not only will it not be more realistic, the
reading will be useless for determining the SWR on your antenna. What
do you mean if you leave it in line it will cause much greater
interence? You can't leave an SWR meter connected between your amp
and antenna?

It is recommended by many that you only have the SWR meter in-line while
checking out your antenna/feed. The extra connections on your feed and the
gap where it goes un-shielded through the SWR meter means theres a greater
chance of causing interference. Put that with the fact you are shoving a
much greater power through this gap and the chances of interference go up
greatly. Are you disagreeing with this?

In fact I just had to stop typing as I was laughing some more
just thinking about it.. lolol
Regards
Lancer

Im glad you took the time to look at my site. How's the 23 channel radio
going ;o)

Doing great, as good sounding as its ever been. BTW, I do have
several other 40 channel rigs.

Then I best not chuckle on the 2-4 in case you are on one of them ;o)

Nice WEB page, lots of good info on it.. Really like all the pics of
the rigs..

Thanks for that. I was going to include a vintage section to show the 23
channel radio's and the old cooker dials. Its still in the ideas pending
pile but if I do I know who to ask for some pics of them. I was also toying
with the idea of an American rig doctor list but im not sure if it would be
a success. What do you or anyone wishing to comment think? Any other
"useful" comments off people would be gratefully received as ive got oodles
of space left but don't want to fill it with un-interesting things. Even
though the website is UK based threes a lot of FCC equipment info on there
and I have no trouble increasing this.

Regards,
Graham

--
_._. _... ._. ._ _.. .. _ _ _

Radio is only a Hobby. Don't let it rule your life...

73's - Graham (www.open-channel.co.uk)

"Chad Wahls" wrote in message
...

"The Magnum" wrote in message
...
Remember, connect a busy system as follows,
CB - Pre-amp - SWR meter - Linear - Antenna

Why would you put any SWR meter before the Amp?

Im suprised you question that. What would you think will happen if you
shove
150w upwards through a cheap basic SWR meter?

If your SWR can't handle the power output of your amp, Do you think
putting it there would give you an accurate reading of the SWR on your
antenna?


Simple, If you are running power, don't buy a cheap SWR meter. It's good
to
have the meter after the amp. You will need to see the reflected power in
case the antenna is rejecting harmonics. At which point you should cease
operation.

No but its going to be more realistic then it pinging off the scale with
extra power going through it. If its left in line it will also cause
much
greater interference than being before the linear. Think about it.

I could care less what SWR the amp is showing my radio in most cases.
I'll
check that very occasionally. I DO CARE about overall reflected power
from
the antenna. This is quite important!

Chad

Hi Chad,
I think unless you saw the original item on my website you wouldn't have
seen the "other" option directly under it which says for the better quality
SWR/PWR meters to go directly before the antenna. Im not sure if Lancer is
picking up on this one point and missed the next line because he was
chuckling at me chuckling at him, and yes, I also agree reflected power from
the Antenna is important especially when kicking power.
That said its amazing to me the amount of people who go on air and seem to
work reasonably well who have never even heard of a SWR meter never mind
tuned in their antenna... scary stuff.......that's one of the reasons I had
an accessory page on my website and a brief description in layman's terms of
what they are for.

Regards,
Graham

--
_._. _... ._. ._ _.. .. _ _ _

Radio is only a Hobby. Don't let it rule your life...

73's - Graham (www.open-channel.co.uk)

"The Magnum" wrote in message
...

"Chad Wahls" wrote in message
...

"The Magnum" wrote in message
...


Hi Chad,
I think unless you saw the original item on my website you wouldn't have
seen the "other" option directly under it which says for the better
quality
SWR/PWR meters to go directly before the antenna. Im not sure if Lancer
is
picking up on this one point and missed the next line because he was
chuckling at me chuckling at him, and yes, I also agree reflected power
from
the Antenna is important especially when kicking power.

Ahh I can see clearly now Did not note that.

That said its amazing to me the amount of people who go on air and seem to
work reasonably well who have never even heard of a SWR meter never mind
tuned in their antenna... scary stuff.......that's one of the reasons I
had
an accessory page on my website and a brief description in layman's terms
of
what they are for.


Well, if they never check reflected power or don't even know what it is and
their rig blows up then I guess we could call that "natural selection."

At least we won't have to hear them

Chad

the last fallopian tube mopathetic was near was his mommy's. After that
it has been ALL Vas Deferens.

the last fallopian tube mopathetic was near was his mommy's. After that
it has been ALL Vas Deferens.

the last fallopian tube mopathetic was near was his mommy's. After that
it has been ALL Vas Deferens.

moparholic is totally ignorant about fixing CB's, but he LOVES the
other part of the deal. Find him weeknights at the Girard, Ohio Petro
toilet and shower area.

You would know, afterall you clean the toilets and god knows what else
there.