Toll Free
Pros: Good reputation and history. They're stable under
most any reasonable circumstance. They're biased into
linearity. That means, when driven reasonably, the amount
of distortion they add is minimal. They're rugged and
reliable.
Cons: They're plain looking and overpriced. Consistency.
In other words, some are better than others. They also
suffer from the same problem almost all other CB amps do:
no thermal (overtemperature) protection. Thermally conecting
the bias diode to the heatsink helps a little (which Messenger
does do), but a thermal switch (my personal favorite) or an
efficient forced air cooling system (ala Pirate et al.) are
the real solutions.
Hope this helps.
--
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A
/ | \
-=[Bill Eitner]=- III
III
III
_________III_________
Outlaw,
Toll-Free is not going to like this, but I personally never did like
the messenger amps. with the single exception being the M4-V.
I don't normally buy and stock amps, but I liked the M4-V so much I
bought one and just put it in a cabinet so that I would have one if
Messenger ever went under.
#12
I agree 100%. The 4V (IMO) is the only really decent amp from messenger... a
good 550+ rms. Just add a fan to both top and bottom!!!
Wm.
Toll Free
Good Point Warlok!
I did get it with the fan kit!
#12
Toll Free,
A good friend of mine was the Messenger distributor here in Chicago.
As a matter of fact H&Y Supply had stuff drop-shipped thru him a few
times to 'hide the paper trail'. Ask you friend who used to work there
about Mark III Communications on the South Side of Chicago....
So I have had plenty of experience with Messengers!
#12
Toll Free
Toll Free
nq9220700-Ostrowski wrote:
I too preferred the M4V. I also like the DX667,but I went with the Messenger
1200. I really like it's size to power ratio (meaning it's small size for good
power)
also like the remote setup too. I looked at the DX1200 and DX1600 and thought
they were way to long to fit in the cab of my truck. So I went with the Messenger
1200 and been happy ever since.
The 666 Landshark
i do 1400 on a bird
no wonder when they roll the watergate ..im like dam
did that guy key up? hehehe
"owell--give me my dam money"
"sombodys got to lose" hehehe
and blue gill there running ..armadillo they too ..dave there ok
texas star dont even put that shit in my war wagon..there a joke
ant nothing like blackstone..eachone is hand made by only him
and he ant taking orders..hahaha owell .those blackstone made girls
are mean.and the got big teeth hehehe
::waving::
from all the good time gang from the boyou country
şżş) PäěŃK죣ęR
Ray,
Remove the SD1446's and put the MRF455's back in and keep your drive
watts down with a lot of swing going in. It won't ever outperform the
Sweet 16 but you like it a lot more!
#12
I feel that just pulling the carrier (dead-key) output down
while keeping the peak (swing) high is all that's necessary.
I've found the 1446 to be a suitable "plug-in" replacement
for the 455. In other words, no other circuit modifications
are necessary, and you net a 20% increase in output.
> I feel that just pulling the carrier (dead-key) output down
> while keeping the peak (swing) high is all that's necessary.
> I've found the 1446 to be a suitable "plug-in" replacement
> for the 455. In other words, no other circuit modifications
> are necessary, and you net a 20% increase in output.
>--------------------------------
Bill,
All of that is true, but from the symptoms described it sounded like he
had too much overall gain. That is a 2-stage amp and the input and
output are separated by 1/8 inch of circuit board at the relay. If the
gain gets too high it wants to 'regenerate' or 'oscillate'. The added
gain of the 1446's may have been to high for the physical configuration
of the amp.
#12
What makes you think the amp was oscillating? Oscillation
creates actual damage, whereas overdrive creates a specific
symptom. There is nothing in the original post to indicate
that the amp was oscillating. I feel you're jumping to an
unjustified conclusion here.
Again, simply reducing the radio's dead-key output would
solve the problem in my opinion.
>
> What makes you think the amp was oscillating?
------------------------------------------------
Just prior experience with Messengers. An I said regenerating as a
possible choice. That is at the verge of oscillation but not quite
there. When the audio starts to sound kind of tinny and hollow.
------------------------------------------------
> Oscillation
> creates actual damage
------------------------------------------------
Not all the time.
------------------------------------------------
> , whereas overdrive creates a specific
> symptom.
------------------------------------------------
Yep. Burned up input resistors and squarewave outputs....
------------------------------------------------
> There is nothing in the original post to indicate
> that the amp was oscillating.
------------------------------------------------
I thought he said he put a lot less carrier in and the dead key was
still way to high..... I would say that's too much input or too high of
gain in the amp. I said one of the symptoms of too much gain could be
regeneration or oscillation.
-------------------------------------------------
> I feel you're jumping to an
> unjustified conclusion here.
-------------------------------------------------
That's quite possible. It sure wouldn't be the first time!
-------------------------------------------------
>
> Again, simply reducing the radio's dead-key output would
> solve the problem in my opinion.
-------------------------------------------------
This could be where I went wrong. I thought he said he tried that.
Thanks Bill,
#12
I know what ya'll mean, though, because I have a fan that starts oscillating
when it gets hot( in the house that is)
You're wrong. Your fan begins *rotating* when it gets hot.
A fan that oscillates wouldn't do you any good.
Sorry, my mistake. You mean a fan that sweeps from one side
to the other and back again.
73
şżş) PäěŃK죣ęR
::waving::
from all the good time gang from the bayou country
şżş) §§ PäěŃK죣ęR §§
dont bump it down list :
#1 toofine79
#2 RDavis
In article <19980228110...@ladder03.news.aol.com>,
paink...@aol.com says...
>
>messenger 4 pill does only 500 bummer
>hahaha
>thats sucks
>
>i do 1400 on a bird
>no wonder when they roll the watergate ..im like dam
>did that guy key up? hehehe
>"owell--give me my dam money"
>"sombodys got to lose" hehehe
>and blue gill there running ..armadillo they too ..dave there ok
>texas star dont even put that shit in my war wagon..there a joke
>ant nothing like blackstone..eachone is hand made by only him
>and he ant taking orders..hahaha owell .those blackstone made girls
>are mean.and the got big teeth hehehe
>
>::waving::
>from all the good time gang from the boyou country
>şżş) PäěŃK죣ęR