Re: [FT897] Linear Amp Keying Problem
The 'ring' on the 3.5mm jack is an input to the 897 that causes the radio to
o/p a carrier. You want theTtx Ground line on the 8 pin mini din socket.
----- Original Message -----
From: "Tom Becker" <TBecker@...>
Sent: Saturday, June 10, 2006 3:05 PM
Subject: [FT897] Linear Amp Keying Problem
> I just got an Ameritron ARB-704 to interface my ft-897 to a Yaesu fl-
> 2100b. I hooked up the keying line out of the ACC jack on the rear
> of the ft-897 (the "ring" line) to the radio input on the ARB-704
> and the ALC (the "tip" line) to the linear amp. And, of course, the
> ARB-704 linear amp line to the linear amp. And.... no joy - no
> I double checked all of my connections, checked that the ARB-704 was
> setup properly with jumpers. Still no joy. Got out the voltmeter
> and starting checking. The ALC line seems to be operating
> properly. However, the keying line shows +5v and does not go to 0
> on keying the ft-897. If anything the voltage increases ever so
> slightly on keying, i.e., about +0.1v.
> Anyone have an ideas? I'm stumped. My guess is that this rig might
> have to go to the shop for repair....
> Yahoo! Groups Links
Thanks so much for the assist. I appreciate it. I have to say that
the documentation with this radio is terrible.
Looks like I'm going to have to manufacture a suitable cable for what
I'd like to do.