[Elecraft] Using K2 with broken D1 on the K60XV

[Don Wilhelm]

Michael,

Given the conditions you now report, I would say that you have some kind of
noise source that is causing the S-meter to respond.  You will have to track
down the source of that noise.  Have you tried it with a 50 ohm load on the
input jack to the K60XV?  There are no active components in the receive path
(other than the PIN diode) on the K60XV board - the input jack is routed
directly to the K2 bandpass filter, so you may want to check the K60XV
carefully for wiring errors.

73,
Don W3FPR

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Michael Jensen
> Sent: Friday, January 06, 2006 1:55 PM
> To: w3fpr at arrl.net; 'Elecraft Reflector'
> Subject: Re: [Elecraft] Using K2 with broken D1 on the K60XV
>
>
> Hi Don
>
> Thanks for confirming me on the use with the broken pin Diode.
>
> For the issue with S meter i did not explain the case very good.
> The issue I
> see is in RX not in TX . I have not testede the K60XV in TX yet.
> But in RX
> the S meter show full signal (all bar light). This do only happen in the
> transverter band on 10M or even on the 60M everything looks ok.
> Nothing are
> connected to the low power in/out on the K2.
>
> Br.
>
> Michael
>
>
> ---- Original Message -----
> From: "Don Wilhelm" <w3fpr at earthlink.net>
> To: <mj at the-jensen-dk.net>; "'Elecraft Reflector'"
> <elecraft at mailman.qth.net>
> Sent: Thursday, January 05, 2006 8:58 PM
> Subject: RE: [Elecraft] Using K2 with broken D1 on the K60XV
>
>
> > Michael,
> >
> > You are correct - the PIN doides D1 and D2 form the T/R switch
> for the low
> > power output.
> >
> > If you do not use the low power output, you can operate the K2 from the
> > normal BNC antenna jack as usual without that diode installed.
> >
> > The number of bars on the K2 LED during transmit indicate the
> approximate
> > power output of the K2 - if you had the LED Display set for RF, the Low
> > power output set for 1 mW maximum, and the requested power set
> for 1 mW,
> > the
> > expected result would be all bars lighted.
> >
> > If you dialed only .5 mW on the K2 power request knob, one would expect
> > only
> > 5 of the bars lighted.  If you have all bars lighted no matter what the
> > power request setting, you should look into the circuits at the lower
> > right
> > quadrant of the K60XV schematic (labeled XVTR ALC) - you will find the
> > problem with that portion of the circuit.  I would need more detail to
> > provide additional information.
> >
> > 73,
> > Don W3FPR
> >
> >> -----Original Message-----
> >>
> >>      During  last night trying to finish op the asssembly of
> the K60XV i
> >>      faced=a  issue,  that during the test on the transverter band (50
> >>      MHz)   the  S=meter was showing full signal at all times. Only on
> >>      the transverter band n=t on 60M or any other band. In desperation
> >>      i   was  looking  for  bad  soldering=pushing  a  little  to  the
> >>      components.  I  did  hit D1, the pind diode that ofca=se broke. I
> >>      have  ofcause  placed an order to replace this diode, but it wil=
> >>      not  arrive here for the weekend. Beeing a lazzy basterd,
> i like to
> >>      use th= K2 for the weekend, but i do not like to remove the K60XV
> >>      and put back th= components. Now the question, for what i can see
> >>      it  will  not  be  a issue t= use the K2 with the K60XV installed
> >>      with a broken or removed diode if&nbs=;a transverter is not used.
> >>      Did i get that wrong ??
> >>
> >>      If  any  comments  on  the  S  meter  showing full
> signal, they are
> >>      welcome as =ell
> >>
> >>      Thanks in advance
> >
> >>      OZ1BZJ
> >>
> >>      Michael
> >>
> >
> >
> >
>
>
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