nice photo of a K1 with LCD backlight

[wayne burdick]

Eric, KE6US, took a great night-time photo of his K1 with the new
backlight installed. He was kind enough to let us post the photo on our
site. See:

    http://www.elecraft.com/K1/K1_backlight_detail.jpg

I believe Eric used the 10 mA option, given the brightness. 6 mA is
just a bit dimmer, but still quite adequate.

The instruction sheet explains how to use the AGC on/off menu entry for
backlight control (you can assign this menu entry to the PFn switch on
the front panel, too). I'd be curious to know whether anyone besides me
has set their K1 up this way.

73,
Wayne
N6KR


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[roncasa]

wayne burdick wrote:
> Eric, KE6US, took a great night-time photo of his K1 with the new
> backlight installed. He was kind enough to let us post the photo on our
> site.

wow!

That looks really cool!

I wonder what the increase in current draw is?

Ron wb1hga
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[EricJ-2]

I measured 58 ma before and 68 ma after with the 200 ohm resistor. This
agrees with what Elecraft is saying.  I didn't try the 330 ohm resistor, but
Wayne says about 6 ma. I was satisfied with the output at 10ma and saving
4ma isn't significant to me since the K1 is usually connected to a 7aH
battery!

It's VERY easy to change the resistor if you don't like what you get. Four
screws pop the whole front panel assy off. Removing one screw, one nut and 3
knobs gives you complete access to the component side of the front panel
board. Change the resistor, reassemble and you're done. Ten minutes from
beginning to end.

More pictures on the K1 page on my web site.

Eric
KE6US
www.ke6us.com

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of ron
Sent: Wednesday, September 14, 2005 11:00 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] nice photo of a K1 with LCD backlight

wayne burdick wrote:
> Eric, KE6US, took a great night-time photo of his K1 with the new
> backlight installed. He was kind enough to let us post the photo on
> our site.

wow!

That looks really cool!

I wonder what the increase in current draw is?

Ron wb1hga
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[Sandy W5TVW]

Got mine installed today.  It works great.  Nice green light
behind the LCD.
Much better than my jury rigged white LEDs!
73,
Sandy W5TVW K1 #1178
----- Original Message -----
From: "ron" <[hidden email]>
To: "Elecraft Reflector" <[hidden email]>
Sent: Wednesday, September 14, 2005 1:00 PM
Subject: Re: [Elecraft] nice photo of a K1 with LCD backlight


| wayne burdick wrote:
| > Eric, KE6US, took a great night-time photo of his K1 with the new
| > backlight installed. He was kind enough to let us post the photo on our
| > site.
|
| wow!
|
| That looks really cool!
|
| I wonder what the increase in current draw is?
|
| Ron wb1hga
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| Help: http://mailman.qth.net/subscribers.htm
| Elecraft web page: http://www.elecraft.com
|
|
|
| --
| No virus found in this incoming message.
| Checked by AVG Anti-Virus.
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|
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[Sandy W5TVW]

Wayne,
    Where is the info on using AGC on/off for turning light on and off?
Nothing on my modification sheet about it.  Also nothing on sheet
currently at Elecraft website.

73,
Sandy W5TVW

Light works great by the way!

----- Original Message -----
From: "wayne burdick" <[hidden email]>
To: "Elecraft Reflector" <[hidden email]>
Cc: "QRP-L" <[hidden email]>
Sent: Wednesday, September 14, 2005 12:43 PM
Subject: [Elecraft] nice photo of a K1 with LCD backlight


| Eric, KE6US, took a great night-time photo of his K1 with the new
| backlight installed. He was kind enough to let us post the photo on our
| site. See:
|
|     http://www.elecraft.com/K1/K1_backlight_detail.jpg
|
| I believe Eric used the 10 mA option, given the brightness. 6 mA is
| just a bit dimmer, but still quite adequate.
|
| The instruction sheet explains how to use the AGC on/off menu entry for
| backlight control (you can assign this menu entry to the PFn switch on
| the front panel, too). I'd be curious to know whether anyone besides me
| has set their K1 up this way.
|
| 73,
| Wayne
| N6KR
|
|
| ---
|
| http://www.elecraft.com
|
| _______________________________________________
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|
|
|
| --
| No virus found in this incoming message.
| Checked by AVG Anti-Virus.
| Version: 7.0.344 / Virus Database: 267.10.22/98 - Release Date: 9/12/2005
|
|
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[wayne burdick]

Sandy, W5TVW wrote:

> Wayne,
>     Where is the info on using AGC on/off for turning light on and off?
> Nothing on my modification sheet about it.  Also nothing on sheet
> currently at Elecraft website.

Sorry about that, Sandy. This information was actually in the e-mail I
sent announcing the backlight, not in the instruction sheet. Here it
is:

ON/OFF Control

The backlight draws only 6 to 10 mA, but you can add on/off control if
desired. One possibility is to use a switch mounted on the left side
panel. However, since most K1 owners never turn off AGC, it may be
preferable to use the AGC menu entry to control the backlight. To do
this: (1) cut the RF board trace running from pin 8 of J6 to C31; (2)
add a jumper on the bottom of the RF board from J6 pin 8 to P1 pin 18;
(3) use another jumper to connect the cathode (K) lead of the backlight
LED to pin 18 of J1 on the front panel board.

The AGC menu entry can be assigned to PFn if you don't use this switch
for XIT or some other function.

73,
Wayne
N6KR

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[Sandy W5TVW]

Many thanks to you, Wayne, and all who responded!  Although I installed
a "two white LED" light mod myself, the backlight is infinitely better!
K1 a great little rig.  Eventually, I will order the T1 to go with my
"HF Packer" amplifier on CW.  Think it will do OK with 25-30 watts on CW
and replace an MFJ coupler I'm using now that is as big or bigger than
the K1!
73,
Sandy W5TVW
----- Original Message -----
From: "wayne burdick" <[hidden email]>
To: "Sandy, W5TVW" <[hidden email]>
Cc: "QRP-L" <[hidden email]>; "Elecraft Reflector" <[hidden email]>
Sent: Thursday, September 15, 2005 6:27 PM
Subject: Re: K1 backlight on/off using AGC menu entry


| Sandy, W5TVW wrote:
|
| > Wayne,
| >     Where is the info on using AGC on/off for turning light on and off?
| > Nothing on my modification sheet about it.  Also nothing on sheet
| > currently at Elecraft website.
|
| Sorry about that, Sandy. This information was actually in the e-mail I
| sent announcing the backlight, not in the instruction sheet. Here it
| is:
|
| ON/OFF Control
|
| The backlight draws only 6 to 10 mA, but you can add on/off control if
| desired. One possibility is to use a switch mounted on the left side
| panel. However, since most K1 owners never turn off AGC, it may be
| preferable to use the AGC menu entry to control the backlight. To do
| this: (1) cut the RF board trace running from pin 8 of J6 to C31; (2)
| add a jumper on the bottom of the RF board from J6 pin 8 to P1 pin 18;
| (3) use another jumper to connect the cathode (K) lead of the backlight
| LED to pin 18 of J1 on the front panel board.
|
| The AGC menu entry can be assigned to PFn if you don't use this switch
| for XIT or some other function.
|
| 73,
| Wayne
| N6KR
|
| ----
|
| http://www.elecraft.com
|
|
|
| --
| No virus found in this incoming message.
| Checked by AVG Anti-Virus.
| Version: 7.0.344 / Virus Database: 267.10.22/98 - Release Date: 9/12/2005
|
|
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