[Elecraft] re: K3 [Elecraft Proset Question

[Joe Subich, W4TV]

> The question is what is really on pin 5 internally right now.  The 
> pinout diagram in the manual says pin 5 is a "Function" pin, and it 
> is marked with an asterisk.  The footnote says "if applicable".  So, 
> I'm guessing there is really nothing going to pin 5 internally right
> now.

Why guess?  Simply look at the schematics posted in the Elecraft web 
site.  

Pins 3 (Down), 4 (Up), and 5 (Function) are connected to a resistor 
network (voltage divider) that provides a specific (different) voltage 
for each of the buttons to a sense input on the controller.  

None of the functions have been implemented in the firmware but the 
hardware is in place. 

73, 

   ... Joe, W4TV 
 




> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David Yarnes
> Sent: Thursday, May 01, 2008 10:44 AM
> To: David Ferrington, M0XDF
> Cc: Elecraft Reflector; k6dgw at foothill.net
> Subject: Re: [Elecraft] re: K3 [Elecraft Proset Question
> 
> 
> David and All,
> 
> I would guess that that would work.  The question is what is 
> really on pin 5 
> internally right now.  The pinout diagram in the manual says 
> pin 5 is a 
> "Function" pin, and it is marked with an asterisk.  The 
> footnote says "if 
> applicable".  So, I'm guessing there is really nothing going to pin 5 
> internally right now.  But you aren't getting bias there 
> either.  That's on 
> pin 6.  That's presumably why you have to tell the K3 via 
> menu to turn on 
> the bias, and it puts bias on the microphone pin.  If the 
> supplied adapter 
> used pin 6 instead of pin 5 I assume you would not have to go 
> to the menu to 
> get bias.  So, I'm guessing now that the real problem would 
> come when they 
> start using pin 5 for some "function" not yet implemented.  
> Maybe I'm all 
> wet, but that's what I interpret from the diagram in the manual.
> 
> Dave W7AQK
> 
> 
> ---- Original Message ----- 
> From: "David Ferrington, M0XDF" <M0XDF at Alphadene.co.uk>
> To: "David Yarnes" <w7aqk at cox.net>
> Cc: <k6dgw at foothill.net>; "Elecraft Reflector" 
> <elecraft at mailman.qth.net>
> Sent: Thursday, May 01, 2008 1:48 AM
> Subject: Re: [Elecraft] re: K3 [Elecraft Proset Question
> 
> 
> > My Proset K2 works fine in the front connector of my K2 using the 
> > supplied adapter cable.
> > This was purchased along with the K3.
> > The Mic is a 'mono' style 3.5mm (pretty sure it's not 1/8", 
> but the  ever 
> > so slightly larger 3.5mm) connector, so the bias must be 
> supplied  to the 
> > tip at a guess.
> > I normally use it in the rear mic socket and so I just set 
> MENU MIC  SEL = 
> > RP.L BIAS
> > (rear panel, low mic gain with bias).
> > 73 de M0XDF, K3 #174
> >
> > -- 
> > God gives every bird his worm, but he does not throw it 
> into the nest.
> > -Swedish proverb
> >
> > On 1 May 2008, at 06:39, David Yarnes wrote:
> >
> >> Fred and All,
> >>
> >> I believe the adapter supplied with the Elecraft Pro Set is a true 
> >> Kenwood adapter.  On the K2 you wired the radio for 
> whatever  microphone 
> >> you wanted. If you wanted to use a Kenwood microphone  
> setup you wired 
> >> the K2 accordingly.  That would put bias on pin 5.   The 
> Elecraft Pro 
> >> Set, which is an electret with the "IC" cartridge,  was 
> deemed to be 
> >> fully "Kenwood compatible, and so they just  supplied a 
> Kenwood adapter 
> >> with the Pro Set, and that worked fine on  a K2 wired for 
> Kenwood.  Along 
> >> comes the K3, with bias preset on pin  6, and they are 
> still sending out 
> >> the Kenwood adapter.  I think  that's why it doesn't work 
> for you.  I 
> >> have the Elecraft Pro Set  also, and I just use the jacks 
> on the back of 
> >> the K3--no adapter used.
> >
> > 
> 
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