Sure ain't no CB amp!! Holy cow!

[k7mh]

Check out this amp on ebay! Yikes!! http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif If N7TH wins it I want to drive to Portland just to check the thing out!

<a href="http://cgi.ebay.com/EIMAC-4CX10000D-HF-LINEAR-AMP-AMPLIFIER-HI-POWER-RF_W0QQitemZ290063042883QQihZ019QQcategor
yZ48700QQssPageNameZWDVWQQrdZ1QQcmdZViewItem" target="_blank">Killer ham amp!</a>

[ko0m]

That amplifier has been listed on eBay before, it keeps getting booted off by the cyber-sales cops; looks like it might make it's full 7 day run this time.

That thing's gonna sell, through a legal eBay auction (where eBay and PayPal gets their cut) or behind the scenes by one of the many of interested parties.

.

[WB2WIK]

It's W2ONV's old amp located in northern NJ.

It's actually not much of a powerhouse, considering the tube used could be. Uses an old B&W 850 tank coil assembly, which in itself would be a big fuse if operated at more than about 4 kW PEP (it was actually rated 1 kW AM service, which could be 4 kW PEP).

Also: It's very old. A lot of components appear original, from the 1950s...I hear "ticking."

WB2WIK/6

[KF0RT]

Top bidder has an apartment address....?

73, Rob

[w8znx]

Steve ur right
check out schematic notes

only running 3,200 volts on the plate

heck Eimac specs
class C 5,000 volts
class AB1 7,500 volts

add to using 572B drivers

home brew jobs like this
are fb if it's your home brew job

to somebody that does not know
what corner was cut here or their

it could be a death trap

kinda like the time a floating choke
with few thousand volts on the case
put a friend in the hospital for a week

new to him rig
plate supply choke shorted to ground
so ex owner floated the choke
if you looked real close you could
see the plastic under the choke

but ex owner did not bother
to make note of it in the paperwork/schematic
or tell anybody when he sold the rig

would strip it for parts
and then build a amp using a zero bias tube

Mac

[KD6NIG]

I could just imagine if, for a second, we assume the thing works as advertised....

You'd probably smoke the electric meter with the amount of spinning it would do!

[w8znx]

Quote[/b] (KD6NIG @ Dec. 22 2006,11:15)]I could just imagine if, for a second, we assume the thing works as advertised....

You'd probably smoke the electric meter with the amount of spinning it would do!
not realy
as Steve noted the B&W tank would melt down

also there just is not enought plate voltage
to make the tube sit up and sing

Mac

[KA4DPO]

Channel 19 will never be the same again.

I'm sure some dummy will buy it and try to use it. Even if it only runs 3Kw the buyer will hook it up with RG-8 coax and promptly fry it. Mac's right, this thing could be a nightmare waiting to happen.

[WB2WIK]

Quote[/b] (k7mh @ Dec. 22 2006,10:14)]Check out this amp on ebay! Yikes!! http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif If N7TH wins it I want to drive to Portland just to check the thing out!

<a href="http://cgi.ebay.com/EIMAC-4CX10000D-HF-LINEAR-AMP-AMPLIFIER-HI-POWER-RF_W0QQitemZ290063042883QQihZ019QQcategor

yZ48700QQssPageNameZWDVWQQrdZ1QQcmdZViewItem" target="_blank">Killer ham amp!</a>
I see somebody's already bid over $5K for it.

That's kind of funny, when you consider an AL-1500 (for example) will actually run more output power and costs less than $3K brand new, with a warranty. And occupy a lot less space.

I "hope" whoever's bidding highly on it is doing so for nostalgia's sake because they want an old time collector's item and not actually an amplifier...

[k7mh]

Quote[/b] ]That's kind of funny, when you consider an AL-1500 (for example) will actually run more output power and costs less than $3K brand new, with a warranty. #And occupy a lot less space.

That would be my preference, or an Alpha 99. Too many monies for me though! http://www.qrz.com/iB_html/non-cgi/emoticons/mad.gif

[KD6NIG]

Quote[/b] (WB2WIK @ Dec. 22 2006,12:34)]Quote[/b] (k7mh @ Dec. 22 2006,10:14)]Check out this amp on ebay! Yikes!! http://www.qrz.com/iB_html/non-cgi/emoticons/wow.gif If N7TH wins it I want to drive to Portland just to check the thing out!

<a href="http://cgi.ebay.com/EIMAC-4CX10000D-HF-LINEAR-AMP-AMPLIFIER-HI-POWER-RF_W0QQitemZ290063042883QQihZ019QQcategor


yZ48700QQssPageNameZWDVWQQrdZ1QQcmdZViewItem" target="_blank">Killer ham amp!</a>
I see somebody's already bid over $5K for it.

That's kind of funny, when you consider an AL-1500 (for example) will actually run more output power and costs less than $3K brand new, with a warranty. #And occupy a lot less space.

I "hope" whoever's bidding highly on it is doing so for nostalgia's sake because they want an old time collector's item and not actually an amplifier...
Over 5k with the reserve not met, so you wonder what THAT is http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif

[KM5FL]

Taken from the description:
"This amplifier is equivalent to $25,000 or more commercial broadcast station amplifier. Reserve is set at a modest amount, less than a third of the commercial built unit."

My guess is the reserve is in the $8,000.00 catagory....


KM5FL

[KC0W]

Quote[/b] (k7mh @ Dec. 22 2006,20:08)]Quote[/b] ]That's kind of funny, when you consider an AL-1500 (for example) will actually run more output power and costs less than $3K brand new, with a warranty. #And occupy a lot less space.

That would be my preference, or an Alpha 99. Too many monies for me though! http://www.qrz.com/iB_html/non-cgi/emoticons/mad.gif
Oh ya? Speak of the devil.KCØW Alpha 99 for sale (http://www.qrz.com/ib-bin/ikonboard.cgi?act=ST&f=1&t=141205)


Tom kcØw

[ka0gkt]

I wonder if that amp is remote controlable...that rotron blower winds up and whines like a gas turbine, I wouldn't want it in the shack; although, properly designed, a 4CX10000 amplifier operating at legal limit levels would be really linear, and the tube wouldn't need quite as large of a cooling blower.

73 DE KAØGKT/7

--Steve

[KM5FL]

Bidding ended at $5,149.. Reserve not met, so I guess the world is still safe..

I've got a couple questions for those who are familiar with this amp.. One of the photos show 2 rows of small tubes, about 7 - 8, sitting next to the 572s.. Anybody know what those tubes are for?? Rectifiers?? Also one of the photos shows a couple of what appears to be 2 incandescent light bulbs.. What's that all about??


KM5FL

[w8znx]

Quote[/b] (KM5FL @ Dec. 23 2006,12:37)]Bidding ended at $5,149.. Reserve not met, so I guess the world is still safe..

I've got a couple questions for those who are familiar with this amp.. One of the photos show 2 rows of small tubes, about 7 - 8, sitting next to the 572s.. Anybody know what those tubes are for?? Rectifiers?? Also one of the photos shows a couple of what appears to be 2 incandescent light bulbs.. What's that all about??


KM5FL
i bet they are VR tubes for screen supply

Mac

[w8znx]

Quote[/b] (KM5FL @ Dec. 22 2006,21:45)]Taken from the description:
"This amplifier is equivalent to $25,000 or more commercial broadcast station amplifier. Reserve is set at a modest amount, less than a third of the commercial built unit."

My guess is the reserve is in the $8,000.00 catagory....


KM5FL
but its not a darn commercial broadcast station
it a ugly home brew death trap

in no way, shape or form could
anybody compare this thing to
commercial gear

5,000 dollars
hell for that much you can buy
an mighty fine Hank or Alpha PA

Mac

[ka5piu]

Hello.

When the last Henry Tempo amps rolled out the door the things went for big bucks, and that is a class act.
If I wanted that much power I would look real hard at an old shortwave transmitter.

[KM5FL]

Quote[/b] (w8znx @ Dec. 23 2006,15:34)]Quote[/b] (KM5FL @ Dec. 22 2006,21:45)]Taken from the description:
"This amplifier is equivalent to $25,000 or more commercial broadcast station amplifier. Reserve is set at a modest amount, less than a third of the commercial built unit."

My guess is the reserve is in the $8,000.00 catagory....


KM5FL
but its not a darn commercial broadcast station
it a ugly home brew death trap

in no way, shape or form could
anybody compare this thing to
commercial gear

5,000 dollars
hell for that much you can buy
an mighty fine Hank or Alpha PA

Mac
Mac:

My point exactly...


KM5FL

[k6az]

Quote[/b] (ka0gkt @ Dec. 23 2006,00:43)]I wonder if that amp is remote controlable...that rotron blower winds up and whines like a gas turbine, #I wouldn't want it in the shack; although, properly designed, a 4CX10000 amplifier operating at legal limit levels would be really linear, and the tube wouldn't need quite as large of a cooling blower.

73 DE KAØGKT/7

--Steve
Don't kid yourself. The type of "big gun" ego who would purchase an amp like this would have no intention of running it at legal limit.

[N1XHF]

Quote[/b] (k6az @ Dec. 23 2006,14:43)]Quote[/b] (ka0gkt @ Dec. 23 2006,00:43)]I wonder if that amp is remote controlable...that rotron blower winds up and whines like a gas turbine, I wouldn't want it in the shack; although, properly designed, a 4CX10000 amplifier operating at legal limit levels would be really linear, and the tube wouldn't need quite as large of a cooling blower.

73 DE KAØGKT/7

--Steve
Don't kid yourself. The type of "big gun" ego who would purchase an amp like this would have no intention of running it at legal limit.
That is true. However a Hb deathtrap like this is most certainly the kind of amp you would want some stupid freebander to have (if they were going to have one).
If the electrical shock from screwing with it with the "golden screwdriver" doesn't kill them. Over exposing themselves to RF floating around their shack from lack of ground, cheap coax and crappy antenna will. LOL (well help make them go blind anyway!)

[AA0CX]

Eeeeeek! What the hell is THAT?! http://www.qrz.com/iB_html/non-cgi/emoticons/tounge.gif

[WB2WIK]

The row of tubes are gas regulator tubes, Mac wins the prize for being an old enough coot to remember that stuff (like me).

The light bulbs are ballasts.

That amp is so old it should have great grandkids by now, and they'd be smaller, lighter, safter and run more power. Based on looking at its guts and the partial schematic diagram, I'd say it's a full time job keeping it running, which is probably why it's for sale.

WB2WIK/6

[N9FE]

total junk, people will buy anything.. N9FE

[ka5piu]

Hello.

If I was to build an HF amp with commercial parts it would be with a broadcast transmitter final module.
Full legal limit would be 1/5 the rating of the thing.
However, low power broadcast transmitters are now available surplus as the newer solid state transmitters are put online.
I would much prefer starting out with a legit commercial unit and convert it than that thing.
But, hay, what do I know, I am just an amateur.

[kb2vxa]

I haven't seen equipment like that since WBAI's "4CX Bird" fund drive in 1969 and the bird ended up as a paperweight on Frank Milspah's desk. http://www.qrz.com/iB_html/non-cgi/emoticons/tounge.gif

Now if you want an amp check out the WA1HLR Blockbuster, if you're an AMer you'll know where to find it.

Hey, that floating choke isn't funny, at least not unless you've seen my water cooled modulation transformer. http://www.qrz.com/iB_html/non-cgi/emoticons/laugh.gif

[n0jaa]

I'd rather just purchase an old 1000-watt commercial tube transmitter somewhere, fix it up, and convert it for amateur radio operation. 160 meters perhaps.

Maybe an old Western Electric 443A...

[ka5s]

Quote[/b] (N9FE @ Dec. 24 2006,19:46)]total junk, people will buy anything.. N9FE
I have a feeling we are looking at HB equipment contemporary to the T368 (http://r-390a.us/T368.htm) (or even the BC-610. (http://eshop1.chem.buffalo.edu/2nd-BC-610.html)). I got to operate a BC-610 once, at the Fort Carson MARS station. That was enough.

Here's to the Good Old days; thank GOD they're gone.

Cortland
KA5S