I need to come up with a dummy load for a 250+ watt xmitter.

IF I take two 100 watt wire wound resistors in parallel (for 50 ohms)
and put them in a can full of silicone oil and feed it though an L-Match
should it work?

Warmest regards,
John
--
Watching the cutting edge of yesterday replay--in virtual reality, right
before my eyes--in real time!
Thirty year old technology--wasn't it amazing?

And what about ELI the ICE man ?
If you have a "L" then "E" leads "I", so I understand.
But suppose then you have another "L", and another, and another.
If "E" keeps leading "I" , then is "I" just slowing down for a cycle at the
"L" ?
-- in udder words - I'd druther keep the dummy load resistive *****
I wonder if that resistance wire in the toaster would work as a dummy load -
go ahead and try it - you can toast bread on the new dummy load.


"John Smith" wrote in message
...
Never mind, just dropped a so-239 on an old gallon can and wired it
up--seems to work great, but haven't checked the swr on the outside of
the can yet... grin

John

"John Smith" wrote in message
...
I need to come up with a dummy load for a 250+ watt xmitter.

IF I take two 100 watt wire wound resistors in parallel (for 50 ohms)
and put them in a can full of silicone oil and feed it though an
L-Match should it work?

Warmest regards,
John
--
Watching the cutting edge of yesterday replay--in virtual reality,
right before my eyes--in real time!
Thirty year old technology--wasn't it amazing?

On Tue, 14 Jun 2005 23:44:06 -0400, "Hal Rosser"
wrote:

And what about ELI the ICE man ?

Hi Hal,

This is the mnemonic that we taught in the Navy.

I wonder if that resistance wire in the toaster would work as a dummy load -
go ahead and try it - you can toast bread on the new dummy load.

I've checked this out, and one element IS 50 Ohms! (Or so it was for
the one I bought for $5 at the thrift store to investigate just this
application.) It worked better for AC/DC than RF.

73's
Richard Clark, KB7QHC

Hal:

It may radiate, it may have a high swr on the cable feeding it... I
just needed to dump 250 watts quickly and didn't have enough time to
construct a "dummy load antenna" everyone is so anxious to speak of
here...

besides, unless you have a damn 50 ohm resistor across your coax--you
only think that 50 ohm antenna load is all resistive!

Warmest regards,
John

"Hal Rosser" wrote in message
. ..
And what about ELI the ICE man ?
If you have a "L" then "E" leads "I", so I understand.
But suppose then you have another "L", and another, and another.
If "E" keeps leading "I" , then is "I" just slowing down for a cycle
at the
"L" ?
-- in udder words - I'd druther keep the dummy load resistive *****
I wonder if that resistance wire in the toaster would work as a dummy
load -
go ahead and try it - you can toast bread on the new dummy load.


"John Smith" wrote in message
...
Never mind, just dropped a so-239 on an old gallon can and wired it
up--seems to work great, but haven't checked the swr on the outside
of
the can yet... grin

John

"John Smith" wrote in message
...
I need to come up with a dummy load for a 250+ watt xmitter.

IF I take two 100 watt wire wound resistors in parallel (for 50
ohms)
and put them in a can full of silicone oil and feed it though an
L-Match should it work?

Warmest regards,
John
--
Watching the cutting edge of yesterday replay--in virtual reality,
right before my eyes--in real time!
Thirty year old technology--wasn't it amazing?

On Tue, 14 Jun 2005 21:32:17 -0700, "John Smith"
wrote:

Hal:

It may radiate, it may have a high swr on the cable feeding it... I
just needed to dump 250 watts quickly and didn't have enough time to
construct a "dummy load antenna" everyone is so anxious to speak of
here...

besides, unless you have a damn 50 ohm resistor across your coax--you
only think that 50 ohm antenna load is all resistive!

Warmest regards,
John

John, be extremely careful in playing around with exoctic dummy loads. If you
don't allow sufficient heat radiation your 'warm regards' may become overheated.

Walt, W2DU

One wonders, with the new co-ed service, how they now teach the resistor
color code :)

"Richard Clark" wrote in message
...
On Tue, 14 Jun 2005 23:44:06 -0400, "Hal Rosser"
wrote:

And what about ELI the ICE man ?

Hi Hal,

This is the mnemonic that we taught in the Navy.

I wonder if that resistance wire in the toaster would work as a dummy
load -
go ahead and try it - you can toast bread on the new dummy load.

I've checked this out, and one element IS 50 Ohms! (Or so it was for
the one I bought for $5 at the thrift store to investigate just this
application.) It worked better for AC/DC than RF.

73's
Richard Clark, KB7QHC

On Wed, 15 Jun 2005 03:46:13 -0400, "Fred W4JLE"
wrote:

One wonders, with the new co-ed service, how they now teach the resistor
color code :)

We had wave ETs back then too. So as to balance the sexual
connotation:

Batman
B***s
Robin
On
Yonder
Gotham
Bridge
Very
Good
Work
Get
Superman
Next

There was also the left hand rule, MFC, which I won't go into here,
and a Mnemonic phrase for the characteristics of all Transistor
amplifier configurations: Azaza VoPiNi lives in the house of BEC (or
something similar to that effect). This was not part of the common
lore, but rather a legacy of some inventive mind. Inventive, I say,
because it was more trouble than simply remembering the
characteristics (the Mnemonic involves building a 3 X 3 table). And
of course we had Eli the Iceman, as has been already offered here for
reactive phase relationships.

73's
Richard Clark, KB7QHC

On Wed, 15 Jun 2005 09:33:19 -0700, Richard Clark
wrote:

One wonders, with the new co-ed service, how they now teach the resistor
color code :)

We had wave ETs back then too. So as to balance the sexual
connotation:

Well back into a non-PC mnemonic for trigonometric identities:

Sally Could Tell Oscar Had A Hard On Always

O
S = ---
H

A
C = ---
H

O
T = ---
A

S, Sine (of angle of interest)
C, Cosine (of angle of interest)
T, Tangent (of angle of interest)
O, Opposite (side opposite from angle of interest)
H, Hypotenuses (longest side, next to angle of interest)
A, Adjacent (side next to angle of interest)

Ah yes the famous Mary. And another that has served me well, Oscar Had A
Hunk Of Ass

I refuse to replace bad boys with Batman for the sake of political
correctness. :) Brings back memories. I was an FTC before attending NESEP.

My Navy electronics training taught me a heck of a lot more than my EE
degree.

"Richard Clark" wrote in message
...
On Wed, 15 Jun 2005 03:46:13 -0400, "Fred W4JLE"
wrote:

One wonders, with the new co-ed service, how they now teach the resistor
color code :)

We had wave ETs back then too. So as to balance the sexual
connotation:

Batman
B***s
Robin
On
Yonder
Gotham
Bridge
Very
Good
Work
Get
Superman
Next

There was also the left hand rule, MFC, which I won't go into here,
and a Mnemonic phrase for the characteristics of all Transistor
amplifier configurations: Azaza VoPiNi lives in the house of BEC (or
something similar to that effect). This was not part of the common
lore, but rather a legacy of some inventive mind. Inventive, I say,
because it was more trouble than simply remembering the
characteristics (the Mnemonic involves building a 3 X 3 table). And
of course we had Eli the Iceman, as has been already offered here for
reactive phase relationships.

73's
Richard Clark, KB7QHC

OR - Here is where some very lossy coax could come in handy - Put a
half-watt 50-ohm resistor at the end of a loooong run of lossy coax.


"John Smith" wrote in message
...
Hal:

It may radiate, it may have a high swr on the cable feeding it... I
just needed to dump 250 watts quickly and didn't have enough time to
construct a "dummy load antenna" everyone is so anxious to speak of
here...

besides, unless you have a damn 50 ohm resistor across your coax--you
only think that 50 ohm antenna load is all resistive!

Warmest regards,
John

"Hal Rosser" wrote in message
. ..
And what about ELI the ICE man ?
If you have a "L" then "E" leads "I", so I understand.
But suppose then you have another "L", and another, and another.
If "E" keeps leading "I" , then is "I" just slowing down for a cycle
at the
"L" ?
-- in udder words - I'd druther keep the dummy load resistive *****
I wonder if that resistance wire in the toaster would work as a dummy
load -
go ahead and try it - you can toast bread on the new dummy load.


"John Smith" wrote in message
...
Never mind, just dropped a so-239 on an old gallon can and wired it
up--seems to work great, but haven't checked the swr on the outside
of
the can yet... grin

John

"John Smith" wrote in message
...
I need to come up with a dummy load for a 250+ watt xmitter.

IF I take two 100 watt wire wound resistors in parallel (for 50
ohms)
and put them in a can full of silicone oil and feed it though an
L-Match should it work?

Warmest regards,
John
--
Watching the cutting edge of yesterday replay--in virtual reality,
right before my eyes--in real time!
Thirty year old technology--wasn't it amazing?