K1 power output on 15 meters

[dennis rosenbalm]

What should the power output be from a K1 set to maximum power on 15 meters? I can only get 2 watts. This seems too low. With the same K1 and a 40/20 module I get 6 watts on both bands.  I've checked the 30/15 module for any errors but it looks good. 30 meters produces 6 watts.  Any suggestions where to look? Thanks all!

Sent from my iPad
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[daleputnam]

the K1 has the ability to produce only slightly less power on 15m.
AND it has the ability to handle up to 15v input.. which helps make more power
on 15m.
  Most K1s that I've had here can make 4+ watts on 15m. However, at that same time
the reception difference between 2 to 4 watts out.. is not a whole lot.
The drop off of power on 15 has always been there on the K1s, however, usually not so much
as you are seeing, when the voltage input is kept close to 15v in without current limitation by the power supply.


Have a great day,
 
 
--...   ...--
Dale - WC7S in Wy
 
 

> From: [hidden email]
> Date: Mon, 23 Nov 2015 11:28:04 -0500
> To: [hidden email]
> Subject: [Elecraft] K1 power output on 15 meters
>
> What should the power output be from a K1 set to maximum power on 15 meters? I can only get 2 watts. This seems too low. With the same K1 and a 40/20 module I get 6 watts on both bands.  I've checked the 30/15 module for any errors but it looks good. 30 meters produces 6 watts.  Any suggestions where to look? Thanks all!
>
> Sent from my iPad
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

     
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Mike Morrow-3]

> What should the power output be from a K1 set to maximum power on 15 meters?
> I can only get 2 watts. This seems too low.

> ...Any suggestions where to look?

My 15-year-old K1 serial 175 (R.I.P...lightening strike!) with 13.8vdc supply could easily produce 6 watts on 15m, using either a 40/30/20/15m or a 30/15m filter board.

Have you attempted re-alignment of the 15m coils (L3, L4, L7, L8)?  Have you verified the exact number of of specified turns on the 15m toroids (L11, L12)?  It is easy to put an extra turn on toroids (just putting the wire through the center counts as the first turn).  That alone will adversely affect the maximum power output.

Mike / KK5F
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Brian Hunt]

Two watts is about what I get on 15-m and I use a 12v laptop PS. It barely gets 5 watts on 40-m. When using the station 13.8v PS it gets 7 watts on 40-m.

I'm looking for a 14v laptop brick. I've seen them but need to capture one  

72,
Brian, K0DTJ
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Don Wilhelm-4]

The K1 should develop greater than 5 watts on any band as long as the
power supply during transmit is greater than 12 volts.

I suggest turning to the Troubleshooting section of the Owner's manual
and doing the Transmit Signal Tracing procedures to determine which
stage is failing.   Once that stage is located, we may be able to help
with further troubleshooting of that particular.

73,
Don W3FPR

On 11/23/2015 11:28 AM, Gee wrote:
> What should the power output be from a K1 set to maximum power on 15 meters? I can only get 2 watts. This seems too low. With the same K1 and a 40/20 module I get 6 watts on both bands.  I've checked the 30/15 module for any errors but it looks good. 30 meters produces 6 watts.  Any suggestions where to look? Thanks all!
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]