I claim Alzheirmers!!!

OK, here is the link:
http://blake.prohosting.com/mailguy2/JS-Rev2.jpg

Regards,
John

"John Smith" wrote in message
...
| OK. Here is a revision... directional coupler changed, "automatic
operation"
| added...
| (and, the .005 caps would be on the ground side of the 1k resistors, at
the
| leds' cathodes!!!)
|
| Thoughts?
|
| Warmest regards,
| John
|
| "John Smith" wrote in message
| ...
|| This is a SWR bridge I built using leds and a homemade "directional
|| coupler."
||
|| ALL critiques on it, and ideas for improvements are welcomed!!!
||
|| Please excuse my rough drawing, I am NOT a draftsperson!
||
|| Hopefully, the attachment of the .jpg was successful....
||
|| Warmest regards,
|| John
||
||
|
|

Well, obivious errors there, such at the 1k gate resistor should be in the
source path, with the gate returned directly to gnd... etc...
But, you get the idea... sketched that TOO quickly...

Regards,
John

"John Smith" wrote in message
...
|I claim Alzheirmers!!!
|
| OK, here is the link:
| http://blake.prohosting.com/mailguy2/JS-Rev2.jpg
|
| Regards,
| John
|
| "John Smith" wrote in message
| ...
|| OK. Here is a revision... directional coupler changed, "automatic
| operation"
|| added...
|| (and, the .005 caps would be on the ground side of the 1k resistors, at
| the
|| leds' cathodes!!!)
||
|| Thoughts?
||
|| Warmest regards,
|| John
||
|| "John Smith" wrote in message
|| ...
||| This is a SWR bridge I built using leds and a homemade "directional
||| coupler."
|||
||| ALL critiques on it, and ideas for improvements are welcomed!!!
|||
||| Please excuse my rough drawing, I am NOT a draftsperson!
|||
||| Hopefully, the attachment of the .jpg was successful....
|||
||| Warmest regards,
||| John
|||
|||
||
||
|
|

On Wed, 4 May 2005 13:40:47 -0700, "John Smith"
wrote:

I claim Alzheirmers!!!

OK, here is the link:
http://blake.prohosting.com/mailguy2/JS-Rev2.jpg


Hi Brett,

Another Watt soaker (you better use 5W 50 Ohm resistors if you don't
want blisters or burnt LEDs) - that is, if the caps (basically
useless) don't turn off the LEDs. You will need to pour the power to
a matched load to light them up (very poor low end sensitivity from
pretty feeble LEDs).

You could as easily throw away all the resistors and caps (and the
so-called constant current source), or at least replace the resistors
to 1/10 value straight to ground.

I thought you wanted cheap?

73's
Richard Clark, KB7QHC

Richard:

Your comments are appreciated, can't get to the bench today...
When I do, will keep your suggestions in mind...

Thanks Richard...

Warmest regards,
John

"Richard Clark" wrote in message
...
| On Wed, 4 May 2005 13:40:47 -0700, "John Smith"
| wrote:
|
| I claim Alzheirmers!!!
|
| OK, here is the link:
| http://blake.prohosting.com/mailguy2/JS-Rev2.jpg
|
|
| Hi Brett,
|
| Another Watt soaker (you better use 5W 50 Ohm resistors if you don't
| want blisters or burnt LEDs) - that is, if the caps (basically
| useless) don't turn off the LEDs. You will need to pour the power to
| a matched load to light them up (very poor low end sensitivity from
| pretty feeble LEDs).
|
| You could as easily throw away all the resistors and caps (and the
| so-called constant current source), or at least replace the resistors
| to 1/10 value straight to ground.
|
| I thought you wanted cheap?
|
| 73's
| Richard Clark, KB7QHC

Well, I won't even mention my supply of mpf-102's--it is limitless... and
those 1/2 inch toroids too...

Regards,
John

"Richard Clark" wrote in message
...
| On Wed, 4 May 2005 13:40:47 -0700, "John Smith"
| wrote:
|
| I claim Alzheirmers!!!
|
| OK, here is the link:
| http://blake.prohosting.com/mailguy2/JS-Rev2.jpg
|
|
| Hi Brett,
|
| Another Watt soaker (you better use 5W 50 Ohm resistors if you don't
| want blisters or burnt LEDs) - that is, if the caps (basically
| useless) don't turn off the LEDs. You will need to pour the power to
| a matched load to light them up (very poor low end sensitivity from
| pretty feeble LEDs).
|
| You could as easily throw away all the resistors and caps (and the
| so-called constant current source), or at least replace the resistors
| to 1/10 value straight to ground.
|
| I thought you wanted cheap?
|
| 73's
| Richard Clark, KB7QHC

On Wed, 4 May 2005 15:04:41 -0700, "John Smith"
wrote:
Well, I won't even mention my supply of mpf-102's--it is limitless... and
those 1/2 inch toroids too...
A backyard full of coal won't make a diamond.

Richard:

No. That is correct coal is better, might help a guy keep "getting warm."
grin


And, that current source works, I have used it many times (makes an
excellent test lamp for 5-30V)... will with stand at least 30V+ across drain
and source and maintain ~10ma... when the REV current to its' led drops to
zero, max flows though the FWD--all other cases they must share that 10ma...

Regards,
John

"Richard Clark" wrote in message
...
| On Wed, 4 May 2005 15:04:41 -0700, "John Smith"
| wrote:
| Well, I won't even mention my supply of mpf-102's--it is limitless...
and
| those 1/2 inch toroids too...
| A backyard full of coal won't make a diamond.

On Wed, 4 May 2005 16:13:10 -0700, "John Smith"
wrote:

And, that current source works, I have used it many times (makes an
excellent test lamp for 5-30V)... will with stand at least 30V+ across drain
and source and maintain ~10ma... when the REV current to its' led drops to
zero, max flows though the FWD--all other cases they must share that 10ma...

Hi Brett,

I've no doubt, but in your circuits - never. Doesn't make sense
unless you need parts ballast. It's like when the watchmakers
advertised watches with 60 jewels, and there were only half a dozen
points that actually used them.

73's
Richard Clark, KB7QHC

Richard:

If I use that at QRP levels, then go to QRO, that constant current source
will be used! I have a couple of burnt leds which offer proof... at a KW
the fet would wave bye-bye (even before I suspect)...

Regards,
John

"Richard Clark" wrote in message
...
| On Wed, 4 May 2005 16:13:10 -0700, "John Smith"
| wrote:
|
| And, that current source works, I have used it many times (makes an
| excellent test lamp for 5-30V)... will with stand at least 30V+ across
drain
| and source and maintain ~10ma... when the REV current to its' led drops
to
| zero, max flows though the FWD--all other cases they must share that
10ma...
|
| Hi Brett,
|
| I've no doubt, but in your circuits - never. Doesn't make sense
| unless you need parts ballast. It's like when the watchmakers
| advertised watches with 60 jewels, and there were only half a dozen
| points that actually used them.
|
| 73's
| Richard Clark, KB7QHC

Richard:

I just climbed up and pulled the SWR meter off the pole--DUH!!! Those 50
ohm resistors are actually 1500 ohm 2 watt metal oxide.... sorry, as usual,
your post was relevant.... I just couldn't see it till I opened up the
box....
I could have sworn I stuck 50 ohm ones in there--getting old here... but now
I can see it, if they had been 50 ohm, power to the ant would have been
really limited.... and I would have "smoked" that winding and resistors...

Anyway, will try to get sometime to toy with it tomorrow, and paste the
"real" schematic of it on the webpage....

Warmest regards,
John

"Richard Clark" wrote in message
...
| On Wed, 4 May 2005 16:13:10 -0700, "John Smith"
| wrote:
|
| And, that current source works, I have used it many times (makes an
| excellent test lamp for 5-30V)... will with stand at least 30V+ across
drain
| and source and maintain ~10ma... when the REV current to its' led drops
to
| zero, max flows though the FWD--all other cases they must share that
10ma...
|
| Hi Brett,
|
| I've no doubt, but in your circuits - never. Doesn't make sense
| unless you need parts ballast. It's like when the watchmakers
| advertised watches with 60 jewels, and there were only half a dozen
| points that actually used them.
|
| 73's
| Richard Clark, KB7QHC