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Author Topic: Palomar 450 HD amplifier?  (Read 16047 times)
KE7KXS
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Posts: 5




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« on: July 23, 2008, 08:27:59 PM »

Hi there, I am researching HF amps and saw this on ebay: http://cgi.ebay.com/Palomar-450-HD-Linear-Amplifier-Brand-new_W0QQitemZ290247785863QQihZ019QQcategoryZ48700QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262

Any idea if this is any good? I realize this is a budget amp.

Thanks, Caesar. KE7KXS.
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N2VWW
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Posts: 242




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« Reply #1 on: July 23, 2008, 08:38:19 PM »

I do not understand why you new to amateur radio guys are fascinated with illegal CB amplifier junk. This amp and all like it are spectrum polluters that will splatter allover the band. My suggestion is, save your pennies and buy a real hf amplifier.

Gary
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KE7KXS
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Posts: 5




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« Reply #2 on: July 23, 2008, 08:53:03 PM »

By definition "new" means unfamiliar with "old" :-)

Why are you "oldies" ham guys (or more aptly you) so put off by helping "newbies" it seems?

Thanks for the uh ... snide answer on the type of amp that it is.
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N4BFD
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Posts: 41




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« Reply #3 on: July 23, 2008, 08:57:26 PM »

It is a broadband amp that would probably work, but it has no filtering, and is probably biased wrong.  It just isn't worth it when you can get a AL-811 so cheap... or a used Heathkit SB-200 for 2-300 bucks.

N4BFD
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N2VWW
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Posts: 242




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« Reply #4 on: July 23, 2008, 09:15:02 PM »

Who said I am put off by the new guys? I am not, I have answered quite a few questions when I have time and I think I can add to the subject weather by a "new" or "old" ham . However I and more likely many of us are put off by the same questions over and over.

I am also "put off" by someone who does not help himself and jumps right in with a question without doing a little research on his own first. I did a search using "Palomar" in this forum and here are the results.

http://www.eham.net/forums/search

We see basically the same questions over and over and over again and we give the same basic answer.

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KE7KXS
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Posts: 5




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« Reply #5 on: July 23, 2008, 09:42:03 PM »

N4BFD, thank you for the helpful reply. I was curious to see if these are the same/similar units/manufacturer I found discussed in old posts here ("Palomar" circa 2006 but not the exact model).

I'll look into the higher price range of Ameritron, SGC, and the like.

Caesar, KE7KXS.

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KB1LKR
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Posts: 1899




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« Reply #6 on: July 24, 2008, 01:01:39 PM »

"...and I think I can add to the subject weather by a "new" or "old" ham..."

Um, you mean "whether"?

<GD&R>

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AE5I
Member

Posts: 124




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« Reply #7 on: July 24, 2008, 08:56:53 PM »

Hi Caesar-

Unfortunately, there's really no "free lunch" when it comes to good HF power amps.  

You can spend less up front on an older sweep tube amp, but you are betting that the tubes will be good and stay good for at least long enough to get something better.  Unfortunately, the replacement tubes for that kind of amp can cost more than the purchase price.

I would recommend that you look at a used Ameritron AL-811.  That's a good, solid amp that uses 3 811A triodes which only cost about $25 each.  It covers all the HF bands plus 160 meters and is a good design that will last a long time.  I think that they're around $700 new so you can expect to pay somewhat less than that for a used one.

There are older amps that can be had for less, like a Heathkit SB-200, SB-220 and others, but the older amps usually don't cover all of the HF/MF bands and they frequently have a fairly high voltage TR relay and require that you buy a buffer box to go between a modern transceiver and the amp.  The Ameritrons don't require that with lots of rigs.

I really would steer clear of anything that looks like it even might be made for the CB market, because I can say, without any fear of overstating it, that those amps are usually pure junk.  They don't normally put out a clean signal either.

Browse ebay for amps made by Ameritron, Drake, Heathkit, Yaesu, Henry and Collins and you'll get a feel for what a good ham amp looks like and costs.

If you're hearing a lot of stations that you can not work, then a good amp might be just the ticket.

Good luck shopping!

73

Tom AE5I
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KB9CRY
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« Reply #8 on: July 25, 2008, 08:19:15 AM »

I realize this is a budget amp.


There are NO budget amps approved for amateur radio operation.

That's the reason for the snide comments.  There are a select few manufacturers and a few others that are no longer in business but their amps may be useable but no budget amps exist.  And these all cost some minimum amount and up.

So stop looking around for any; or just assume that any that look like a budget amp are actually illegal CB amps from the beginning.
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N4TTS
Member

Posts: 152




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« Reply #9 on: July 25, 2008, 12:24:33 PM »

Over and over ad nauseam...

People who passed a test by memorization who obviously
haven't learned enough about IMD products and spectral
purity, are convinced the old "swang" producing crap
that impressed their CB buddies should be just peachy
to use to pollute the space occupied by operators
already quite sensitive to the influx of individuals
who don't want to be bothered with researching anything
themselves.

They immediately are offended by seasoned veterans
telling them to grow up and become amateur operators
rather than spoon fed, radio-urban legend believers.

They are the same ones so offended by radio friends of
many years who rebuke their attempts to join the fun
when they interrupt on-going conversations among said
friends on the air with feeble, G5RV jr, off
frequency, D104 overdriven audio, poor excuses of a
signal only to get a signal report while peppering
their speech with Q signal and hi hi laden hobby speak.

You want to join the brotherhood?

Throw away your CB "knowledge", read a friggen' book
or two, go over to a real amateur radio operators shack
and spend some time LISTENING. Listen to the voices of
experience not only about station construction and accepted
equipment usage but on the air practices as well.

Don't come in pushing yourself on the so called "old
timers" because you have the perception that you have
just as much "right" to jump in the middle of
everything right off the bat because you passed a
dumbed down test that allows eight year olds to get
an Extra class license.

Y'all newbies need to stop acting like a bunch of
little grade school girls who cry their eyes out
every time someone suggests they might just try to
learn something.

Jeeze...

Don N4TTS
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KE7KXS
Member

Posts: 5




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« Reply #10 on: July 25, 2008, 02:03:25 PM »

AE5I many thanks for the helpful reply as well!

I will research the brands you suggested.

My preference is for transportable/portable emcomm operation.  So, at this moment I'm closely looking at SGC and Ameritron solid state amps roughly $1K-1.5K including power supply.

The next class up appears to be the Yaesu and Icom 1KW solid state amps, but the price / watt doubles ($4K for 1KW, vs $1K for 0.5KW), and the size/weight is challenging to easily move (trying to fit within 2 pelican boxes).

Thanks again, 73, Caesar KE7KXS.
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KB1GTX
Member

Posts: 461




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« Reply #11 on: July 25, 2008, 05:56:27 PM »

KE7KXS, Hunt down the schematics of some of "those cb amps" then find the schematics of ham radio sets and compare the ham radio output stages to the cb amps, you'll be surprised at the similarity with the only difference being an out put harmonic filter for each band on the ham sets.
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W4KVW
Member

Posts: 482




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« Reply #12 on: July 25, 2008, 06:46:33 PM »

PALOMAR "ANY" model amplifier equals "ILLEGAL" for use on ANY band in the United States of America which is just what is aays,NO BAND including ham bands,CB band,or free bands!Pretty SIMPLE & your welcome for the FREE information. }:>)

Clayton
W4KVW
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AE5I
Member

Posts: 124




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« Reply #13 on: July 26, 2008, 06:47:23 PM »

Hi Caesar-

For portable operation, SGC and Ameritron are good ones to look at.  

Also, for portable/temporary operation, give careful consideration to your antenna system.  Every improvement you can make there will be well worth it.

Good luck shopping!

Tom AE5I
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K3JVB
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Posts: 837


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« Reply #14 on: July 27, 2008, 11:43:47 AM »

Yes..the 811 is hard to beat.

I have used a FL-7000 for the last three years, and never looked back. I use it with the Ft-767gx.

Auto band switching, also has an auto ant tuner. Makes me lazy..LOL

But it does put out a nice clean 600 watt signal 10-160.

This New-Old ham still like tubes ....
73
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