Re: T1 Remote tuning

Posted by GeorgeP1111 on Mar 12, 2011; 2:03pm
URL: http://elecraft.85.s1.nabble.com/Re-T1-Remote-tuning-tp6162460p6164386.html

dw-4 wrote

Hi George,
If your interested in sharing, I would be interested in your config for
your tuner.
I'm in the process of acquiring parts for an updated unit that handle a
kw.
So I'm curious on how anyone is building remote tuners these days :)

Hi Duane...

I think you may have misunderstood my post.  I'm not building a remote tuner, I'm building a interface to use the T1 tuner's remote control tuning option so I can mount the T1 outside at the antenna sight.

That being said, basically what I'm doing is sending my 13.8vdc bench supply out the coax to the remote interface where is dropped to 9v to power ON the T1 and 5v to start a PIC counting 2 seconds (to allow the T1 to boot up and stabilize) then pulling the tune line low for 1 second to initiate the T1's TUNE function.  After the T1 tunes up, the 13.8v is turned OFF until next tune-up is needed.  Actually, the way I'm probably going to configure it is to use a NC push button from the my 13.8v bench supply to keep power applied to the T1 when the station is running because I think I'm going to put a DPDT relay out there also (in the interface) to ground the antenna when the station is not in use.  Momentary pushing the button would restart the T1 & PIC activating the TUNE.

73's

de George
WD0AKZ