[ICOM] PW-1 and Omni VI

[htankin at comcast.net]

Physically I am only sending dc voltage to pin 7.

Harry WE1X

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

> The ACC jack on the PW1 has a pin for "Band Voltage Input", pin 4. Now I 
> assume this is not being used but instead the bands are controlled by 
> the C1v cable. I assume the power is supplied by pins 7 and 2(gnd) and 
> the ALC feeds from pin 5. This is all true if you are using an ICOM rig 
> but what is the purpose of that pin 4 if band data comes through the 
> C1V? I doesn't say if Pin 4 is an output or an input. 
> On your Mk-V, do you use these pins or just send dc voltage through pin 
> 7? 
> As for ALC. My guess is that TenTec did not consider ALC's purpose to be 
> for protecting the Amp. so they just dropped it. I know their Hercules 
> amp has an ALC jack but the manual doesn't mention it. The whole ALC 
> thing is rather mysterious. 
> Steve N4LQ 
> 
> -----Original Message----- 
> From: htankin at comcast.net 
> To: ICOM Reflector 
> Date: Fri, 08 Oct 2004 15:48:29 +0000 
> Subject: Re: [ICOM] PW-1 and Omni VI 
> 
> > Steve, 
> > 
> > My current station consists of an Icom 756 PRO, Yaesu Mark V Field and 
> > the Icom PW-1. Both transceivers are fully interfaced to the PW-1 ... 
> > the Mark V Field takes full advantage of the PW-1's auto band and 
> > antenna selection features. 
> > 
> > Although I'm using the Mark V and you have the Omni VI interfacing 
> > should be possible. Couple of things: 
> > 
> > (1) I came across some info (when and where I don't recall) that the 
> > Omni V and VI employed the same band data as Icom. Hence, if true it 
> > would appear that a converter would not be necessary, only requiring 
> > you to build the necessary cables. I was only able to do the same with 
> > my Mark V by using the microHAM Band Decoder..which by the way is an 
> > outstanding piece of kit. You may want to explore this option if the 
> > Omni VI band data is not the same as Icom. 
> > 
> > (2) While the Omni VI band data may be same as Icom, the question 
> > remains regarding the CI-V control necessary for the PW-1. Again, it 
> > may be easier to use the microHAM Band Decoder to handle this. 
> > 
> > (2) My understanding is ALC is essential as the first line of 
> > protection. Why TT does not provide this I fail to understand. You may 
> > want to check with Tech Support. I was able to use an RCA patch cable 
> > between the Mark V Field ALC jack and the PW-1 ALC jack. 
> > 
> > (3) There are two ways to power the PW1. (a) use the PW-1 auxillary 
> > power supply per page 9 of the PW-1 manual. This works, but will 
> > require the control head LEDs to remain on all the time. (b) take power 
> > (13.8V, 0.5A) from the Omni VI (if available) or separate source to pin 
> > 7 of the PW-1's ACC1 or ACC2 sockets. I did this with the Mark V 
> > Field..so when I turn on the Field the PW-1 lights up as if I were 
> > using the 756 Pro. However, be sure the OmniVI or other source 
> > provides 0.5 amps at 13.8V. 
> > 
> > (4) I then use an RCA patch cable between my Mark V Field's TX GND jack 
> > and the PW-1 SEND jack. 
> > 
> > (5) Configured the Mark V Field and PW-1 per the PW-1 manual as if the 
> > Mark V was an Icom rig. 
> > 
> > (6) Adjusted the ALC setting on the PW-1 
> > 
> > All works great. Both the 756 Pro and Mark V Field drive the PW-1 and 
> > the Mark V appears to be an Icom rig to the PW-1. 
> > 
> > Again, if the band data and CI-V issues are difficult to resolve, the 
> > microHAM Band Decoder could be a solution. I have found Jozef and the 
> > microHAM folks to be outstanding regarding tech questions, support, 
> > etc. Again, an excellent product. 
> > 
> > Hope this helps. 
> > 
> > Harry WE1X 
> > 
> > 
> > 
> > -------------- Original message -------------- 
> > 
> > > I am trying to figure out how to interface the PW1 and Omni VI. 
> > First, 
> > > the Omni VI has no ALC input so I suppose I will be taking a risk of 
> > > overloading the amp. The amp seems to have it's own protection system 
> > > anyway. 
> > > Next, what about automatic band changing? It looks like the ACC jack 
> > on 
> > > the amp uses voltage changes to make it change bands but then it also 
> > > looks like the CV1 input does the same thing. I'm confused about this 
> > > part. It also looks like I need to rob 12v from the Omni and wire it 
> > to 
> > > the ACC cable for a power source to the PW1's control head but will 
> > that 
> > > interfere with having another (Icom) rig connected at the same time? 
> > > Finally, there's the issue of cw keying. I want to maintain QSK 
> > keying 
> > > but it looks like I'll need to rig up an interface for this. Perhaps 
> > I 
> > > can use the Omni's key-in/out voltage to drive a transistor to 
> > > conduction and sink the PW1's send line to ground? 
> > > Your thoughts? 
> > > N4LQ Steve 
> > > 
> > > ---- 
> > > 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/