[Elecraft] K3 Variable amp keying delay >>not long enough!!??

[Greg - AB7R]

No lack of communication.  :)  Many people were asking for some amount of 
adjustability.  Up to 20mS is what Wayne could do and get it out quickly.  I 
believe he still plans to increase this but the code is going to be more involved.  
The item is still on the list.


-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065


On Fri May  9  0:18 , AD6XY - Mike  sent:

>
>Some lack of communication between Greg and Wayne I expect regarding the
>published figures. Luckily, this is a simple thing to fix one would hope. I
>sent in a list of relay transit times on 2nd April.
>
>It was quite clear that 20mS was needed for the smaller coaxial relays like
>the very commonly used CX540 and up to 50mS for the very high power relays
>that you might use on a 1.5kW 6m amplifier. I was surprised to discover the
>maximum delay was set to only 20mS as this is not enough; a margin is
>needed. 
>
>The CX540 is common and http://www.nts-electronic.com/cx540d.htm tells me it
>takes 20mS to engage and 15mS to release. Tohotsu relays are very common.
>The CX230, CZX3500, CX600, CX800, CX140
> and CX120 are often used in amateur applications (because they are cheap).
>They also all specify 20mS.
>
>For really high power SSB electronics (Germany) do a specialist range of
>relays. These specify 30mS for the HF400 series, 40mS for the HF500/1500
>series and 50mS for the HF4000 series.
>
>
>
>
>wayne burdick wrote:
>> 
>> George,
>> 
>> Before settling on a max of 20 ms we looked at a number of amplifiers 
>> and got input from several "experts. If yours (or others) really need 
>> more than 20 ms, I can increase the delay with some additional work.
>> 
>> Please contact me directly if you find out any more about your 
>> particular delay time requirements.
>> 
>> tnx
>> Wayne
>> N6KR
>> 
>> On May 8, 2008, at 5:53 PM, George wrote:
>> 
>>> The FAQ for the K3 promised a 0-50 ms amp keying delay.  We got only 
>>> 0-20 ms in the latest release.    I don't think 20 ms is enough in my 
>>> case, based on my primitive research.  Several "experts" have said 
>>> mine might need as much as 30-35 ms.  My amp's relay is a 30 yr old 
>>> Potter & Brumfield open frame model with a 120vac  coil.
>> 
>> 
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>> 
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>
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