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K3S driving an Alpha 86

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weaverwf@usermail.com

K3S driving an Alpha 86

Will a K3S key an Alpha 86 direct without an intermediate relay? I'm trying to set up my system quickly for the ARRL 160 and hoping to get a quick answer.

Thanks and 73,

Bill WE5P

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Bob McGraw - K4TAX

Re: K3S driving an Alpha 86

What are the keying requirements of the Alpha? The values of voltage
and current should be in the Alpha manual. Then are those requirements
in the range as defined on page 28 of the Tentec Omni VII manual,
paragraph IMPORTANT NOTICE. From this information you should be able
to determine YES or NO.

73

Bob, K4TAX

On 12/6/2019 8:19 PM, Bill Weaver wrote:

>
>
> Will a K3S key an Alpha 86 direct without an intermediate relay? I'm trying to set up my system quickly for the ARRL 160 and hoping to get a quick answer.
>
>
>
> Thanks and 73,
>
> Bill WE5P
>
>
>
>
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
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Vic Rosenthal

Re: K3S driving an Alpha 86

In reply to this post by weaverwf@usermail.com

Bob McGraw - K4TAX

Re: K3S driving an Alpha 86

Sorry Vic, I had a different manufacturer manual in front of me trying to assist another ham with his radio and amp connection.

Bob, K4TAX

Sent from my iPhone

> On Dec 6, 2019, at 9:45 PM, Victor Rosenthal 4X6GP <[hidden email]> wrote:
>
>
> ______________________________________________________________
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DC-3

Re: K3S driving an Alpha 86

I have used a K3 with an Alpha 76, 78 and 77DX.

On 12/6/2019 8:08 PM, Bob McGraw K4TAX wrote:

> Sorry Vic, I had a different manufacturer manual in front of me trying to assist another ham with his radio and amp connection.
>
> Bob, K4TAX
>
>
> Sent from my iPhone
>
>> On Dec 6, 2019, at 9:45 PM, Victor Rosenthal 4X6GP <[hidden email]> wrote:
>>
>>
>> ______________________________________________________________
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Jim Brown-10

Re: K3S driving an Alpha 86

In reply to this post by weaverwf@usermail.com

On 12/6/2019 6:19 PM, Bill Weaver wrote:
> Will a K3S key an Alpha 86 direct without an intermediate relay?

Yes. A look at the Alpha schematic shows that the key input is buffered.

73, Jim K9YC
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Roger-3

Re: K3S driving an Alpha 86

In reply to this post by DC-3

No problem with the ALPHA amplifiers - the switching voltage is approx. 24 V
@ 350 mA. The K3S MOSFET switch will switch up to 200 V (absolute MAX.!) and
several amperes.................

But to make sure connect a voltmeter to the PTT socket on the amp and
measure the voltage then switch to current measurement and switch the
amplifier to TX with the multimeter. If both readings (voltage and current)
are within limits then you are absolutely safe!

73 Roger, DL5RBW

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of DC
Sent: Saturday, December 07, 2019 6:28 AM
To: [hidden email]
Subject: Re: [Elecraft] K3S driving an Alpha 86

I have used a K3 with an Alpha 76, 78 and 77DX.

On 12/6/2019 8:08 PM, Bob McGraw K4TAX wrote:
> Sorry Vic, I had a different manufacturer manual in front of me trying to
assist another ham with his radio and amp connection.
>
> Bob, K4TAX
>
>
> Sent from my iPhone
>
>> On Dec 6, 2019, at 9:45 PM, Victor Rosenthal 4X6GP <[hidden email]>
wrote:

>>
>>
>> ______________________________________________________________
>> 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 Message delivered to
>> [hidden email]
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
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> [hidden email]

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Mike VE3YF

Re: K3S driving an Alpha 86

In reply to this post by weaverwf@usermail.com

Yes Bill I used to drive a Alpha 86 with my K3S. Same as my 91B, just a
cable between the rig and the amp and no buffer etc required.

--

*73 De Mike*
*VE3YF

_/http://www.ve3yf.com/_*

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ke9uw

Re: K3S driving an Alpha 86

In reply to this post by Roger-3

The Alpha 86 has a 10K resistor on the input of a cmos nand gate. So pulling that to ground is simple...and well within the K3s 200 V/5 A specs.

Chuck Jack Hawley
KE9UW

Sent from my iPhone, cjack

> On Dec 7, 2019, at 2:32 AM, Roger <[hidden email]> wrote:
>
>
> No problem with the ALPHA amplifiers - the switching voltage is approx. 24 V
> @ 350 mA. The K3S MOSFET switch will switch up to 200 V (absolute MAX.!) and
> several amperes.................
>
> But to make sure connect a voltmeter to the PTT socket on the amp and
> measure the voltage then switch to current measurement and switch the
> amplifier to TX with the multimeter. If both readings (voltage and current)
> are within limits then you are absolutely safe!
>
> 73 Roger, DL5RBW
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of DC
> Sent: Saturday, December 07, 2019 6:28 AM
> To: [hidden email]
> Subject: Re: [Elecraft] K3S driving an Alpha 86
>
> I have used a K3 with an Alpha 76, 78 and 77DX.
>
>> On 12/6/2019 8:08 PM, Bob McGraw K4TAX wrote:
>> Sorry Vic, I had a different manufacturer manual in front of me trying to
> assist another ham with his radio and amp connection.
>>
>> Bob, K4TAX
>>
>>
>> Sent from my iPhone
>>
>>> On Dec 6, 2019, at 9:45 PM, Victor Rosenthal 4X6GP <[hidden email]>
> wrote:
>>>
>>>
>>> ______________________________________________________________
>>> 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 Message delivered to
>>> [hidden email]
>>>
>>
>> ______________________________________________________________
>> 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 Message delivered to
>> [hidden email]
> ______________________________________________________________
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Chuck, KE9UW