[ICOM] Icom 756 PRO III output power

[Carl Braun]

ALL

On page 4-6 of the PRO III technical manual the specification calls for a 105w power output at 14.100 MHz.  It appears the ONLY thing required is an RF wattmeter connected to ANT 1 (along with other parameters that show what functions should be OFF) allowing a person to monitor the output while adjusting R507.  

Here's where I found the tech manual  http://www.qsl.net/icom/manuals.html

FYI 

Carl AG6X

-----Original Message-----
From: icom-bounces at mailman.qth.net
[mailto:icom-bounces at mailman.qth.net]On Behalf Of Robert Chudek
Sent: Thursday, November 01, 2007 1:48 PM
To: ICOM Reflector
Subject: [ICOM] Icom 756 PRO III output power


Carl,

I highly recommend NOT tweaking the power output. Without the proper test 
equipment you will certainly screw up the linearity (quality) of your TX 
signal! Get the second tube. :-)

73 de Bob - KØRC in MN

http://k0rc.spaces.live.com
http://czudek.spaces.live.com
http://chudek.aberon.net
http://www.pclink.com/~k0rc

  ----- Original Message ----- 
  From: Carl Braun
  To: ICOM Reflector
  Sent: Thursday, November 01, 2007 1:18 PM
  Subject: RE: [ICOM] ] Icom 756 PRO III output power


  Thanks to everyone who replied to my email and my request for MORE POWER 
out of the PRO III.

  I played around with the rig last night and found that I was guilty of 
checking the RTTY signal into the Bird 43P which was set to read PEP.  When 
I removed the PEP I was able to see a full 100w...well maybe 98 or so.  I 
also had the opportunity to replace the 9V batteries in the Bird.

  The advice I received on bumping the power via the technical manual will 
definitely be researched...thanks to Blair K3YD for that one!

  Maybe I should just leave the PRO III alone and put a second 3CX1200 in 
the Henry...that would solve my QRO issue.

  Again, thanks for all of your help.

  Carl

  -----Original Message-----
  From: icom-bounces at mailman.qth.net
  [mailto:icom-bounces at mailman.qth.net]On Behalf Of K0BX
  Sent: Wednesday, October 31, 2007 4:47 PM
  To: ICOM Reflector
  Subject: [ICOM] ] Icom 756 PRO III output power


  Carl this subject has been beating to death here.  You will get all
  kinds of comments, but the fact is that my Pro3 does not drive my Drake
  L-7 like the TS-850S or even the IC-706MK2G.

  I think you need to stand on one foot and wait until a blue moon or
  something like that to get full output.

  Joe K0BX


  Carl Braun wrote:

  >Hello
  >
  >I am new to the reflector and a new PRO III owner as well.  I've 
researched the archives and found quite a few subjects relating to low 
output power from 746 and 756 owners.  I am running a PRO III into a 5 
element Telrex monobander with FLAT vswr.  I cant get any where near 100w 
out of this rig into the yagi or even into a bird dummy load.  I have a 
Diamond SWR meter and a Bird 43 with both measuring to within a few watts of 
each other....about 85-88w on 14.200.
  >
  >I use a Henry 3K Premier amp that likes to see 110 or so watts from the 
Ft1000 on the bench...with the Icom, the power is way down out of the amp.
  >
  >I have heard that these rigs can produce more power...is this true?  I am 
NOT running the Icom PS but rather I am using a 35amp Astron PS so 
additional current draw would not be a concern.
  >
  >Comments from the Icom gurus?
  >
  >Thanks in advance
  >
  >
  >Carl AG6X
  >
  >----
  >Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
  >Icom Users Net: Sundays, 1700Z, 14.316 MHz
  >Icom FAQ: http://www.qsl.net/icom/
  >
  >
  >

  ----
  Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
  Icom Users Net: Sundays, 1700Z, 14.316 MHz
  Icom FAQ: http://www.qsl.net/icom/
  ----
  Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
  Icom Users Net: Sundays, 1700Z, 14.316 MHz
  Icom FAQ: http://www.qsl.net/icom/

----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/