[ICOM] IC-735 Interface

[Taylor Jim-CJT001]

Gary,

Thanks for the suggestions. I looked at your suggestions, and I like the
first one best, as it has low parts count, and I have most of the items.
The second one the parts count is pretty high, but Far Circuit who lives
within 3 mi of my QTH has the board. In the 3rd link, I started an email
dialog with Doug VK4ADC and he has something that I would prefer, but
his is not a commercial product. He might be willing to provide me a
partial board though. 

Decisions, decisions. 

Thanks again,

And Best Regards,

Jim T.
WB8HMD
-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
On Behalf Of Gary P. Fiber
Sent: Wednesday, February 09, 2011 6:00 PM
To: ICOM Reflector
Subject: Re: [ICOM] IC-735 Interface

Seems to me I once saw an article where an enterprising ham used the
band switching voltages to switch an antenna relay. For the life of me I
can't remember where.
The voltages are published, even the parts on the schematic of like the
AT-100, AT-150, AT-500, 2KL all depended on the transceiver sent band
switching voltage to change bands.
I don't remember about the IC-4KL though. I don't think it would be to
hard to duplicate the circuit providing the chips are still available
Icom used.
I don't remember them being special either.

You might do a Google search on Band Voltage switched antenna switching
or a variation of that.
Wow here is one already
http://techdoc.kvindesland.no/radio/feed_lines/20060919163830596.pdf
Another using the band voltage
http://www.om5gt.szm.com/switch/switch.pdf
PICAXE one that uses the CI-V I think
http://www.vk4adc.com/content/index.php?option=com_content&task=view&id=
45&Itemid=1

Google search phrase below there seem to be many that pop up Icom
automatic antenna switching

Gary K8IZ

On 2/9/2011 3:32 PM, Taylor Jim-CJT001 wrote:
> Greetings to the Icom List. I have a Q that I'm sure has been 
> addressed here previously, but I am a newcomer to the list. I'm 
> looking for an interface for my IC-735 that will drive external relays

> etc that will follow the band switch. I have looked at the CT-17 but 
> it doesn't do what I want ? Array Solutions has the BandMaster II 
> interface but Big $$, as does another one at 2x the cost of the Array 
> Solutions box. I'm sure someone has confronted this problem before and

> found a low cost solution. Any suggestions ?
>
> Regards,
>
> Jim Taylor
> WB8HMD
> ----
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--
Gary P. Fiber K8IZ

General Radio Telephone Operators License PG-19-6691, with Shipboard
Radar Endorsement.
Washington State Resident.

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