More info:
1. By "tampered with" it looks like someone rewound the choke to skip a
couple of turns right in the middle. There is some silk thread holding the
choke together at top and bottom--never seen that on a commercially-made choke.
2. The 15m switch contacts *appear* OK. They may have been replaced, but
there's no charring or other evidence of nasties on the wafer itself. You
can see where the tap used to be soldered to the coil.
3. Not related, but as an aside...I did (gently) try and run the amp up on
17m using the 20m position, but no workee. The input circuit doesn't tune
anywhere near to 17m, which surprised me. I haven't opened it back up
again to see if maybe someone else changed the L-C ratio in the input
circuit or what.
I'm tempted to just replace the 15m tap and go for it, I just didn't know
if there was some known issue with the nominal choke on 15m. Or maybe I
should just replace it with a B&W 802 or a National R-175A.
>On 2/12/06 at 2:17 PM Scott Townley wrote:
>
> >Can someone on the list send me a photo of the "original" plate choke on
> >the BTI LK-2000HD? I don't know if the non-HD is the same but if so that
> >will of course do.
> >My choke looks like it's been tampered with, and the 15m bandswitch
> >position is missing its strap to tap the inductor. Not sure if someone
> >went chasing down some choke suckout or what, but it would be nice to know
> >the starting position.
> >Thanks,
> >
> >
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|