[Dx-qsl] DX-QSL Digest, Vol 117, Issue 9

[Joe Subich, W4TV]

The FT-897D is *not* suitable for direct connection to the FL-2100.

The TX GND signal on the CAT/Linear jack is only capable of switching a
low current, *positive* voltage as used in the Quadra.  The FL-2100 has
a *NEGATIVE* PTT voltage (about -18V unloaded) as can be confirmed by
examining the schematic.

The PTT voltage is derived from the bias supply.

In order to interface the FT-897D to the FL-2100 you will need a buffer
circuit - either a low current relay or solid state buffer like the
WB9KZY "keyall": http://wb9kzy.com/keyall.htm, Ameritron ARB-704:
http://www.ameritron.com/support.php?productid=ARB-704, or Harbach
Electronics SK-201: http://www.harbachelectronics.com to isolate the
FT-897D from the negative PTT voltage in the FL-2100.

73,

   ... Joe, W4TV


On 10/10/2013 12:00 PM, dx-qsl-request at mailman.qth.net wrote:
> Date: Thu, 10 Oct 2013 07:57:02 -0400
> From: "co8ly"<co8ly at frcuba.co.cu>
> To:<160m at mailman.qth.net>,<yaesu at mailman.qth.net>,
> 	<dx-qsl at mailman.qth.net>,	<dxpeditions at mailman.qth.net>,
> 	<cw at mailman.qth.net>,	<contest at mailman.qth.net>,
> 	<adxa at mailman.qth.net>,<10m at mailman.qth.net>
> Subject: [Dx-qsl] From CO8LY
> Message-ID: <2F1B9E2AFD884E7BB6838C0CFC298186 at co8ly>
> Content-Type: text/plain;	charset="x-user-defined"
>
> Dear friends
>
> I need that somebody explains to me as connecting the Yaesu FT-897D with a
> lineal
> FL2100z, I need to know where to connect the PTT of the lineal one in the
> FT-897D.
>
> Also if somebody has badges or components of the old Yaesu FT-747, mine a
> ray
> burn the PLL that this in the front part of the equipament and I need to
> repair it
> because it is very strong to make contest.
>
> Forgive so many nuisances.
>
> A million thank you in advance
>
> Strong hug
>
> Eduardo CO8LY
>
>