[Elecraft] PLL/BFO Stability Mod

Thu Feb 27 10:02:00 2003

Bob, the "d" during CAL PLL is normal.  I think it shows up when the "data"
is being written.  I had the same question a couple of months ago...

73,
Randy, KS4L
----- Original Message -----
From: "Bob Patten" <[email protected]>
To: "Elecraft" <[email protected]>
Sent: Thursday, February 27, 2003 8:46 AM
Subject: [Elecraft] PLL/BFO Stability Mod

> Several reported glitches every 5kHz after doing this mod.  I did also,
> and on further checking found that the range of the PLL Reference
> Oscillator was reduced from its original 15kHz to 11.3kHz.  This was
> below what Elecraft expected for a minimum range.  My solution was to
> re-install the original two xtals and remove the 1.8K resistor from RP2.
> Now, I have a range of over 20kHz (NOTE: 5 more than the original
> range!) and still have frequency jumps on odd freqs.
> I did the CAL PLL with VFO set to 7100.10.  During the VFO
> linearization, the display flashed a "d" on the right every few seconds.
>  What is the significance of the "d" - I see no mention of it in the
> manual and suspect it may indicate an error of some sort, especially
> since I'm still experiencing glitches.
> Anybody else played with this after having installed the "stability" mod?
>
> Further notes: Yes, I DID remove the resistor that was added for the mod
> and checked RP2.  Pins 7-8 are 10K.
> I left the BFO mod with the new toroid since it should not affect the PLL.
>
> --
> 73,     Bob Patten, N4BP                Plantation, FL
>
> E-Mail: [email protected]                   Website: http://www.qsl.net/n4bp
> QRP ARCI #3412    SOC #1    ARS #799    Whiners #6   FISTS #7871
>
>
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