[Dx-qsl] From CO8LY

Thu Oct 10 16:16:48 EDT 2013

 > You have the whole reason and for that reason I asked if somebody had
 > fact some design for the FL2100z
One correction, the FL-2100z uses positive voltage keying (unlike the
FL-2100 ad FL2100B). Unfortunately, instead of a single relay the
FL2100Z has three relays and a "speed up" circuit which is likely to
result in more current that the FT897D TX Gnd can handle.
 > Favor to look at the manual of the 897 and tell me that I can make.
I do not have access to the FT-897D Service Manual/schematics but the
Operating Manual says (page 10):
 > The “TX GND” T/R control line is a transistor “open collector”
 > circuit, capable of handling positive amplifier relay coil voltages
 > of up to +50V DC and current of up to 400 mA.
I would recommend connecting a meter capable of measuring current from
the center pin of the RY jack and chassis of the FL-2100Z and measuring
the specific current. You may be able to switch it directly but only if 
it is significantly less than 400 mA.
If you are using an intermediate relay, simply make sure that it has
a low current (high resistance) coil so the FT-897 sees a low current
on the TX GND pin.
 > The Jack 3,5mm ACC has three coneciones:
 >
 > - EXT ALC
 > - TX REQ
 > - GND
Unfortunately, TX REQ is PTT input (e.g. for a foot switch) not an
output for keying an amplifier.
73,
 ... Joe, W4TV
On 10/10/2013 3:40 PM, co8ly wrote:
> You have the whole reason and for that reason I asked if somebody had
> fact some design for the FL2100z
>> I to the FL2100z connect him a small relay of 12 volt CD for key
> the 18 negative volts, now I activate the PTT of the lineal one with 12volt
> but I want to know if in the ACC jack it can accept those
> 12 volt of the relay that I have put and to that leaves of the jack I
> connect
> the 12 volt so that when me TX those 12 volt goes to earth and activate
> the FL2100z.
>> The Jack 3,5mm ACC has three coneciones:
>> - EXT ALC
> - TX REQ
> - GND
>> Favor to look at the manual of the 897 and tell me that I can make.
>> I wait anxious your comment.
> 73.' Eduardo CO8LY
>> ----- Original Message -----
> From: "Joe Subich, W4TV" <w4tv at subich.com>
> To: "co8ly" <co8ly at frcuba.co.cu>
> Cc: <dx-qsl at mailman.qth.net>
> Sent: Thursday, October 10, 2013 2:14 PM
> Subject: Re: DX-QSL Digest, Vol 117, Issue 9
>>>> 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: 2013年10月10日 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
>>>>>>