Cobra 450XL Palomar Magnum 4500

[Happy_Hamer]

I have one of these amps with the MRF-454 transistors I believe?

Can I use this on 3-30 Mhz? Of course at lower power input on the lower frequency?

I cannot tell what transistors I have because the stainless shield is covering them but I can see the Motorola logo on all 4 of them.

Mine looks just like this inside

 

[BOOTY MONSTER]

heres some info about the 450xl .
http://cbworldinformer.com/200112/cobra_xl450.htm
looks like 4xMRF 454 transistors .

free cell knows all about that amp and can give you a definitive answer on all your questions about it .

 

[minitrucker]

i have a cobra 450xl with 4x1446's in it looks just like that inside also

 

[freecell]

Cobra XL450 Palomar, Magnum 4500

both of them are for 26 - 30 mhz. operation only.

 

[Switch Kit]

So in otherwords , CB Only ? Well , I take that back , 10 meters would count for that , right ? Still a well made filterd amp huh Freecell even if it's just cb radio only. 10 meters around these parts I here tell is a dead issue , those poor guys are always coming down to the lowly cb bands cause they can't find anybody to talk to there. Go figure ? This amp was made in a dudes garage but still falls under the amateur service ? Hmmmmm

 

[C2]

I wonder if you took out some of the filtering if it would work on the lower bands.

 

[BOOTY MONSTER]

i THINK...........the cobra 500xl is usable from 7-30 MHz . maybe you could find someone willing to trade even or bump a few bucks one way or the other . you could always just buy one and have 2 very clean and well made amps .

btw......i believe the filtering in the amps are lowpass filters @ 50 MHz or so . theyre designed to help prevent problems with more commonly used household devices . taking them out would not help you .

 

[Beetle]

For any wide-range multi-band amplifier, the output filtering has to be "bandpass" rather than just "low-pass", and would typically involve input filtering as well.

 

[freecell]

"........usable from 7-30 MHz..."

the Cobra XL500 operates from 3.5 - 29.7 Mhz..

 

[TonyV225]

you should see this Palomar TX5200 I have its pretty big so cooling isnt a problem its a 4 pill sporting 4 - 2SC2290 it has a band selector on the front 80 ,40 , 20 , 10-15 and built the way an amp should be clean great sounding amp but pretty big in size.

 

[AudioShockwav]

Tony, can you post some pictures of the Band pass filter and the inside of your amp?
Or E-mail them to me?
i had one of these amps several years ago, and let it go, wish i never had.
When my hard drive crashed last I lost all the photo`s of it.
Thank you


73
Jeff

 

[lonestarbandit]

hey id like to get my hands on a cobra 450 xl/ palomar magnum 450/ palomar skipper 450 in good shape for a fair price (again) foolishly parted with the last one i had....would like another if yall hammies get bored with em! lol leme know! lonestarbandit@hotmail.com

73s!

 

[lonestarbandit]

nevermind! 450 magnum on the way. older model. 4x2290s

 

[Happy_Hamer]

I would wonder if this can be converted for 6 meter use?

 

[hightower]

looking for cobra 450 xl

If anyone has one of these cobra 450 xl or cobra 500 xl amps for sale I would like to buy one.
allengarner@comcast.net