[Elecraft] ERR PL1

[Evert Bakker (PA2KW)]

Hello,

 

As temperature rises (in the shack), FP (34 degC) does,  and a problem
popped up; ERR PL1.

 

I did check the PLL voltage. PLL1 = 7.5 (which seems to be the limit I
guess), PLL2 = 3.5 (Sub-RX) at 28 Mc and FP 34 degC

 

When FP was 22 degC: PLL1 = 3.8 and PLL2 = 3.4.

 

After recalibration of the VCO, is gives E00272 / ERR VCO. 28Mc not useable
anymore and an unstable PLL1 Voltage. Even 24 Mc needs about a second to
give a go-ahead. 

 

I did open the K3 as to check connections of all the coaxial
interconnection. No effect (after warming up again).

 

It looks like PLL1 is very unstable in relation to the FP temperature and
PLL2 much less.

 

I do have a second K3 and see PLL1 at 7.3 on 28Mc (coming anxiously close to
7.5).

 

Anyone a clue where to look or what to do?

 

73's, Evert PA2KW