[ICOM] PW-1 and Omni 6

[Steve N4LQ]

Well I can definitely tell you that the lack of ALC is no problem. I just 
adjust the Omni VI's power output for the proper drive and it keys 
beautifully. This Omni VI is modified however. The amp keying is usually 
done by a relay but this has been bypassed and instead, the TXD signal 
drives a transistor which in turn keys the PW-1. I've been running it at 
speeds slightly over 50wpm QSK and have had no trouble. I did have the 
"protect" kick off a few times while using the IC-781 which tends to have a 
slight spike on keydown however.
No, my only problem at hand now is getting the band switch on the amp to 
follow the rig. If the Icom gear is using TTL then I should be able to drive 
it directly although I did give that a try and nothing happened. I can't 
seem to interpret what address I should be using. The Omni's addresses are 
like 04 through 20 and Icom speaks in hex I suppose. I wonder if it matters?

Steve N4LQ
----- Original Message ----- 
From: "Adam Farson" <farson at shaw.ca>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Wednesday, October 27, 2004 9:49 PM
Subject: RE: [ICOM] PW-1 and Omni 6


> Hi Steve,
>
> You may not even get that far. I am informed that without the ALC line
> connected, the PW1 will trip on ALC fault every time the exciter is keyed.
>
> If you can get into the Omni VI and bring out the internal ALC line via a
> buffer, such that the ALC range on the external line is 0 to -4V
> negative-going, we can go on to the next step. If the Omni's "Serial Port"
> presents an electrical interface similar to that of an Icom transceiver, 
> you
> should be able to plug it into the PW1 CI-V jack. You will need to set the
> data rate in the radio to 4.8 or 9.6 kB/s.
>
> 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 Steve N4LQ
> Sent: 27 October 2004 16:18
> To: ICOM Reflector
> Subject: Re: [ICOM] PW-1 and Omni 6
>
> Thanks for the reply Adam. The Omni VI has two serial ports. One is called
> the "Interface Port". This is a 25 pin D connector that "allows direct
> RS-232 interface with a personal computer." The other is a 1/8" jack that
> "allows 2 wire computer control using TTL Logic levels." This is called 
> the
> "Serial Port".
> So you see why this is confusing! I can't feed that RS-232 port into the
> PW-1's 3 mm port since they don't exactly match up. The "Serial Port" is
> TTL. Is that supposed to match up with a CT-17? If so, then why not just 
> run
> the 1/8" connector directly to the PW-1 as we do with the Icom rigs and 
> skip
> the CT-17 interface?
>
> Steve N4LQ
> ----- Original Message -----
> From: "Adam Farson" <farson at shaw.ca>
> To: "'ICOM Reflector'" <icom at mailman.qth.net>
> Sent: Wednesday, October 27, 2004 1:52 AM
> Subject: RE: [ICOM] PW-1 and Omni 6
>
>
>> Hi Steve,
>>
>> My understanding is that the Omni VI's CI-V protocol emulates that of the
>> IC-735, with the added ability to set PTT. In theory, it should
>> inter-operate with the PW1; you will need a CT-17 or equivalent to 
>> connect
>> the Omni VI RS-232 interface to the PW1's CI-V port (3mm mono jack).
>>
>> There is another issue, though; as I recall, the Omni VI is not fitted
>> with
>> an external ALC input. Any attempt to operate the PW1 without a
>> correctly-adjusted ALC loop to the exciter can place the expensive
>> MRF150's
>> in the amplifier at risk of destruction. The ALC line is the PW1's first
>> line of defence.
>>
>> http://www.qsl.net/ab4oj/quadra/sshfamp.html#11
>>
>> 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 Steve N4LQ
>> Sent: 26 October 2004 18:23
>> To: ICOM Reflector
>> Subject: [ICOM] PW-1 and Omni 6
>>
>> Will the Omni VI's serial port interface with the PW-1? I haven't been
>> able
>> to get them to communicate with each other.
>> Steve N4LQ
>>
>
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