It seems you were right, Eric. I had my K3 open for surgery recently
to install the KRX3. Of course, that involved lots of repositioning
of the coax cables. I also took the opportunity to make sure all the
internal screws were tight. When I got everything back together, the
encoder nois
Hi Joe,
The mod in my case removed an S2-S3 tuning hash from 60m completely. I
can't hear anything while spinning the VFO now, even with no antenna
connected.
73 de James K2QI
On Wed, Aug 26, 2009 at 12:57 PM, Joe Planisky wrote:
> I have the VFO encoder noise on the low end of 10M. Yesterda
The h/w mod does not really impact the noise at all. It is required
though and is there to maintain reliable signaling between the main
processor and the synthesizers when the CPU to Synct serial bus speed is
increased with SPI=2. Its the change to SPI=2 that reduces the noise.
this can also b
I have the VFO encoder noise on the low end of 10M. Yesterday, I
applied the VFO tuning noise reduction mod and switched to SPI 2 in
CONFIG:VCO MD. That seems to have reduced the tuning noise a little,
but not as much as I'd expected (or hoped). The noise was a solid S3
before the mod, b
From: Eric Swartz - WA6HHQ, Elecraft [mailto:e...@elecraft.com]
Sent: Friday, August 14, 2009 2:36 PM
To: James Sarte
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 VFO Tuning noise reduction
Yes, you absolutely must make the h/w mod for the diode/resistor change
if you enable the tunin
Yes, you absolutely must make the h/w mod for the diode/resistor change
if you enable the tuning mod in the K3 menu. If you do not make the h/e
change, and then enable this feature in the menu, there may be
intermittent synthesizer communication failures in your radio (which
could be temperatur
I did the latest illustration for Wayne and I found it very easy to solder
to the vias shown.
I will admit that my actual procedure was slightly different from what Wayne
wrote. Since Wayne had worked out exactly how the parts fit on the board, it
was not necessary to assemble the diode/resistor
Yup, makes sense now. Thanks for the clarification.
73 de James K2QI
On Fri, Aug 14, 2009 at 10:27 AM, Stewart wrote:
> No, you still have the diode and resistor in series.
>
> However as the each of the vias go to pads 15 & 20 of the
> connectors respectively, soldering to the pads is an alter
No, you still have the diode and resistor in series.
However as the each of the vias go to pads 15 & 20 of the
connectors respectively, soldering to the pads is an alternative
to soldering to the vias.
You can check the continuity with a VOM just to make sure.
Hope that's OK ?
73
Stewart G3RX
Solder the components directly to the pads; you mean in parallel instead of
series??? I'm probably wrong, but I'm having a hard time visualizing this
for some reason. Please explain.
Thanks!
James K2QI
On Fri, Aug 14, 2009 at 6:29 AM, Stewart wrote:
> I found it easier to solder the components
I had a tuning noise issue on 60m, but nothing noticeable anywhere else. Is
the hardware mod really necessary if the firmware successfully suppresses
the encoder noise? When I have SPI2 on in firmware, it totally eliminates
all ticking noise previously heard around 5MHz. It would seem to me that
I found it easier to solder the components directly to the connector pads.
End result is the same, no more VFO tuning noise on 6m.
73
Stewart G3RXQ
On Fri, 14 Aug 2009 05:20:12 -0500 (CDT), Bill W4ZV wrote:
>
>
> John Lemay wrote:
>>
>> Hello all
>>
>> Has anyone carried out the VFO tuning noise
John Lemay wrote:
>
> Hello all
>
> Has anyone carried out the VFO tuning noise reduction modification yet ?
>
> The photo is a little unclear (or maybe it's my eyes) - it looks as though
> one resistor-diode combination has the anode connected to the resistor and
> the other pair has the cat
7;
Subject: [Elecraft] K3 VFO Tuning noise reduction
Hello all
Has anyone carried out the VFO tuning noise reduction modification yet ?
The photo is a little unclear (or maybe it's my eyes) - it looks as though
one resistor-diode combination has the anode connected to the resistor and
the other pair
Hello all
Has anyone carried out the VFO tuning noise reduction modification yet ?
The photo is a little unclear (or maybe it's my eyes) - it looks as though
one resistor-diode combination has the anode connected to the resistor and
the other pair has the cathode connected to the resistor. Have I
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