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oscarvais@speedy.com.ar

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lu1xs

oscarvais@speedy.com.ar

I need to connect my amplifier fl2100z with K3, direct connect to key out to RY the amp FL2100Z or I have to put a relay, please i need help and thank you very much.-

LU1XS, Oscar
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Joe Subich, W4TV-4

Re: oscarvais@speedy.com.ar

Oscar,

Looking at the FL-2100z schematic (*** NOT *** the original
FL-2100B) shows that the relay line is about +18V DC. You
should be able to use "Key Out" directly but since there
are multiple relays involved, I would recommend a buffer
like the Ameritron ARB-804 or an intermediate relay for
safety.

Note: the original FL-2100 and FL-2100B had negative voltage
on their key line and require a relay/buffer when used with
the K3.

73,

... Joe, W4TV

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of
> [hidden email]
> Sent: Saturday, March 27, 2010 4:41 PM
> To: [hidden email]
> Subject: [Elecraft] [hidden email]
>
>
> I need to connect my amplifier fl2100z with K3, direct
> connect to key out to RY the amp FL2100Z or I have to put a
> relay, please i need help and thank you very much.-
>
> LU1XS, Oscar
> ______________________________________________________________

______________________________________________________________
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Don Wilhelm-4

Re: oscarvais@speedy.com.ar

In reply to this post by lu1xs

Oscar,

I don't know the specifics of your particular amplifier - BUT -
The K3 KEYOUT can handle up to 200 volts DC (positive only) at 5 Amperes.

You can easily measure the requirements of any amplifier with a DMM.
First set it to read voltage and measure the open circuit voltage (to
the amplifier ground) from your amplifier KeyIn (or PTT IN or whatever
it is labeled). If that voltage is positive and less than 200 volts,
check one passes.
Then configure your DMM to read current. Connect the positive probe to
the center conductor of the amplifier KeyIn jack and touch the negative
probe to ground (that should operate the relay in the amplifier). If
the current is less than 5 Amps and the voltage test succeeded, then the
K3 can key that amplifier.

73,
Don W3FPR

[hidden email] wrote:
> I need to connect my amplifier fl2100z with K3, direct connect to key out to RY the amp FL2100Z or I have to put a relay, please i need help and thank you very much.-
>
> LU1XS, Oscar
>
>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
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W8JI

Re: oscarvais@speedy.com.ar

Watch out using a steady-state meter to measure amplifier
currents! The 2100Z is a good example of a very odd circuit.

The FL2100Z has positive relay voltage. It has a peak relay
closure current surge of about 500-600 mA (that settles
lower) and about 16-18 volts open circuit without much
backpulse. It should be good for direct keying with the
Elecraft K3 if the K3 will take 5 amps.

The regular FL2100 has negative relay voltage. No good on
the FL2100.

> [hidden email] wrote:
>> I need to connect my amplifier fl2100z with K3, direct
>> connect to key out to RY the amp FL2100Z or I have to
>> put a relay, please i need help and thank you very much.-
>>
>> LU1XS, Oscar
>>
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list:
> http://www.qsl.net/donate.html

Don Wilhelm-4

Re: oscarvais@speedy.com.ar

Tom,

You are correct, peak currents are difficult for the average amateur to
measure. So perhaps a "rule of thumb" might be that the steady-state
current should be no higher than 500 ma. would be good for the K3 - I
doubt that peak currents would exceed 5 A if there is only 500 ma
steady-state. I realize that is a dangerous statement, because
exceptions could occur, and I have no proof that a 10x safety factor is
a good one.

For the understanding of all (I know Tom understands this) - the peaks
(both voltage and current) are important for solid state devices - many
will be damaged if the peak values are exceeded even for an instant. In
the days of vacuum tubes we did not worry as much about it because they
could come through such peaks unscathed - solid state devices are not as
forgiving. As we used to say "the transistor will protect the fuse" -
think about that - it is often fact.

73,
Don W3FPR

Tom W8JI wrote:

> Watch out using a steady-state meter to measure amplifier
> currents! The 2100Z is a good example of a very odd circuit.
>
> The FL2100Z has positive relay voltage. It has a peak relay
> closure current surge of about 500-600 mA (that settles
> lower) and about 16-18 volts open circuit without much
> backpulse. It should be good for direct keying with the
> Elecraft K3 if the K3 will take 5 amps.
>
> The regular FL2100 has negative relay voltage. No good on
> the FL2100.
>
>
>

lu1xs

Re: oscarvais@speedy.com.ar

In reply to this post by W8JI

Hi! Friend,

Thank you very much for information I'm trying my k3 a week ago, I'm happy
with this toy .-

good life friend

LU1XS, Oscar
----- Original Message -----
From: "Tom W8JI" <[hidden email]>
To: <[hidden email]>; <[hidden email]>
Cc: <[hidden email]>
Sent: Saturday, March 27, 2010 11:35 PM
Subject: Re: [Elecraft] [hidden email]

> Watch out using a steady-state meter to measure amplifier currents! The
> 2100Z is a good example of a very odd circuit.
>
> The FL2100Z has positive relay voltage. It has a peak relay closure
> current surge of about 500-600 mA (that settles lower) and about 16-18
> volts open circuit without much backpulse. It should be good for direct
> keying with the Elecraft K3 if the K3 will take 5 amps.
>
> The regular FL2100 has negative relay voltage. No good on the FL2100.
>
>
>
>> [hidden email] wrote:
>>> I need to connect my amplifier fl2100z with K3, direct connect to key
>>> out to RY the amp FL2100Z or I have to put a relay, please i need help
>>> and thank you very much.-
>>>
>>> LU1XS, Oscar
>>>
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
>
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lu1xs

Re: oscarvais@speedy.com.ar

In reply to this post by Don Wilhelm-4

Hola Don,

Thank you very much my friend, is a great help, I connect it directly and
operate vy good, Fl2100Z RY 17 DC 300 mA.

73, CUL

LU1XS, Oscar

LU1XS, Oscar
----- Original Message -----
From: "Don Wilhelm" <[hidden email]>
To: <[hidden email]>
Cc: <[hidden email]>
Sent: Saturday, March 27, 2010 9:40 PM
Subject: Re: [Elecraft] [hidden email]

> Oscar,
>
> I don't know the specifics of your particular amplifier - BUT -
> The K3 KEYOUT can handle up to 200 volts DC (positive only) at 5 Amperes.
>
> You can easily measure the requirements of any amplifier with a DMM.
> First set it to read voltage and measure the open circuit voltage (to the
> amplifier ground) from your amplifier KeyIn (or PTT IN or whatever it is
> labeled). If that voltage is positive and less than 200 volts, check one
> passes.
> Then configure your DMM to read current. Connect the positive probe to
> the center conductor of the amplifier KeyIn jack and touch the negative
> probe to ground (that should operate the relay in the amplifier). If the
> current is less than 5 Amps and the voltage test succeeded, then the K3
> can key that amplifier.
>
> 73,
> Don W3FPR
>
> [hidden email] wrote:
>> I need to connect my amplifier fl2100z with K3, direct connect to key out
>> to RY the amp FL2100Z or I have to put a relay, please i need help and
>> thank you very much.-
>>
>> LU1XS, Oscar
>>
>
> E-mail clasificado por el Idenfificador de Spam Inteligente.
> Para modificar la categoría clasificada acceda a su webmail
>
> Este mensaje ha sido verificado por el E-mail Protegido.
> Antivirus actualizado en 27/03/2010 / Versión: 0.95.3/10639
>