[ICOM] Icom 7000 power question

[Roger (K8RI)]

On 8/22/2013 11:02 PM, John Geiger wrote:
> I have a question about the Icom 7000 that hopefully someone can answer.  On the 706 series, if you turned the power back using the RF power control, the rigs would show a brief spike at full power when you first transmitted.  QST even verified this in their reviews.  Does the 7000 have the same problem?
>
I've had a number of 7000s for mobile and portable, but never ran the 
QRO so I never noticed a spike.  I do have a Tetrode amp where the 
spikes are particularly noticeable/obnoxious.

I can tell you it's not present in the 756 Pro series or the 7600.  It's 
more of a technology implementation than one of device speed and as far 
as I know virtually all rigs, Icom or others, that use the ALC to set 
the power level out have the problem. If they just adjust the gain of 
the driver, or driving stages the spike is not there. OTOH unless you 
run QRO with a tetrode amp where you have to reduce the drive 
substantially, or operate a rig at QRP levels you or anyone else  are 
unlikely to notice it. Even with rigs that have the problem, I don't 
think it's obnoxious with only small power reductions.

Whether deserved or not, Icom has the reputation for leading edge 
spikes. But as has been noted, Icoms are not the only brand rigs to have 
the problem.

I'd like to see a list of all rigs that have the leading edge spike at 
reduced power.

Possibly asking the question on the Ham Amps and Amps reflectors might 
get you an answer.  I think I'll ask on Ham Amps.

73 and sorry I can't give you a direct answer.

Roger (K8RI)
>
>
> 73 John AF5CC
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