[Icom] 706 power output

[icom@mailman.qth.net]

Ed,
   Be sure your Power Supply is not sagging, and that you don't have any
connections that are becoming resistive.   You pull more current on the
higher bands for the same power out, I've seen this affect several 706's,
mobile or fixed.  Check your voltage where it enters the radio with a
DVM.   If it drops below 12.000 volts, you will see this problem.

73's de Stephen, K0SD in NC

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On Sun, 13 Jul 2003 03:18:27 +0000 w5htw@att.net writes:
> Have noticed recently (and I admit I never paid much attention 
> before) that the
> output on my original 706 has fallen off on 10, 12 and 15 meters, as 
> well as on
> 6 meters.  Into a dummy load, I'm getting 95 watts output on CW or 
> FM (or RTTY)
> on 160, 80, 40, 30, 20, and 17 meters, but am seeing only 65 watts 
> on 10, 12, 15
> and 6.  And about 28-30 watts on AM, which is down markedly from the 
> 45 I used
> to get on these bands. 
> 
> Perhaps it has been this way all along, but I don't think so.  I 
> wish I had
> taken the time to measure it 'back then' but never gave it a 
> thought, as most of
> my operation has been on 20 or 75 where it works great. The rig is 
> used largely
> mobile, but only on 75, 40 and 20, but I just brought it into the 
> house and was
> trying it on 6 meters when I noticed it was low in output.  Switched 
> to dummy
> loa d and checked other bands.    
> 
> I'm wondering if there are adjustments that could have changed.  I 
> have the
> schematic but no service manual.  Or perhaps others get a similar 
> reduction in
> power at the higher frequencies?  (I doubt that, too.)   My guess is 
> one of the
> BP filters is used for all of those bands (15/12/10/6) and I'm 
> wondering if
> anyone else has first of all, seen the problem, and secondly 
> corrected it.  
> 
> Thanks
> 
> 
> --
> Ed Brooks, W5HTW
> http://w5htw.home.att.net/index.html
> Active since June 1956
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