[ICOM] Icom PW-1 Failures - How To

[Adam Farson]

Hi Harry,

Here is some further clarification courtesy Matt, KK5DR:

...The ATU can be operated without the PA section enabled. It can also be
operated without the PW1 even being powered up. DC power to operate the ATU
and antenna selector is provided by the exciter through the ACC cable. 

These features [Antenna selector & ATU operation with PW1 powered down] are
only provided on later versions of the PW1, S/N 1165 or higher.

The ATU requires at least 60 watts of drive to complete a tune cycle.  

Cheers for now, 73,
Adam VA7OJ/AB4OJ


-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of we1x at comcast.net
Sent: 08 June 2005 15:17
To: ICOM Reflector
Subject: RE: [ICOM] Icom PW-1 Failures - How To

Went back and tried it..I stand corrected.

thanks Adam.

Harry WE1X

-------------- Original message -------------- 

> Hi Harry,
> 
> To quote the PW1 user manual, p. 2: 
> 
> When the linear amplifier is OFF, the [AMP/PROTECT] does not light and 
> the exciter's signal is applied to one of the output connectors or the 
> IC-PW1's antenna tuner.
> 
> Ibid., p. 14, top: 
> 
> This antenna tuner is also used when the linear amplifier is turned 
> OFF.
> 
> The Yaesu Quadra can also be configured with ATU on-line and PA stage
> off-line: [OPERATE] key off, [TUNER] key on. 
> 
> The ATU insertion loss is approx. 0.5 dB. 
> 
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
> 
>


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