[Elecraft] K1 DC voltage check

Mark Petrovic mspetrovic at gmail.com
Sat Feb 27 15:12:55 EST 2016


Thank you, Don.

What does drastically mean in this context?

> On Feb 27, 2016, at 11:59 AM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
> 
> Mark,
> 
> You are effectively reading the voltage drop across D16.
> That 600mV drop across D16 will not drastically affect the operation of the K1.
> If you would like a bit higher voltage on the PA transistor, you can increase the voltage of your power supply a bit (the K1 upper voltage spec is 15 volts).  If you are running on batteries, it will make a little difference.
> If you would like a lower voltage drop across D16, replace it with a 95SQ015 which is available from Elecraft as p/n E560009 (it is used in the K2 as the series reverse voltage protection diode.
> 
> 73,
> Don W3FPR
> 
>> On 2/27/2016 2:32 PM, Mark Petrovic wrote:
>> I'm performing the DC voltage checks (page 30 of the instructions), which occur immediately after installing the power switch on the RF board.
>> 
>> P1 pin 16 is supposed to be supply minus 300mV, but I get 600mV.  Is this a cause for concern?
> 


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