[Elecraft] K3S driving an Alpha 86

[hawley, charles j jr]

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 <roger at mulzer.de> 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: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of DC
> Sent: Saturday, December 07, 2019 6:28 AM
> To: elecraft at mailman.qth.net
> 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 <k2vco.vic at gmail.com>
> wrote:
>>> 
>>> 
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>> 
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