K3 rig control with RS-232 does not work with 'cold' radio

[LB3SA]

I have a K3 with all modules except transverter interface. The radio does not communicate with the PC (or Mac) before it has been on for about 45 minutes - consistently. I turn on one of my rig control/logging programs or K3 utility right after the radio is turned on. Without touching anything the communication does not start to work before the radio has been on for between 30 and 45 minutes.

If this had been my K2 I would have checked for dry/cold solder joints but since this is a factory built module I chose so far to leave it alone.

Any ideas?

[Julian, G4ILO]

LB3SA wrote

I have a K3 with all modules except transverter interface. The radio does not communicate with the PC (or Mac) before it has been on for about 45 minutes - consistently. I turn on one of my rig control/logging programs or K3 utility right after the radio is turned on. Without touching anything the communication does not start to work before the radio has been on for between 30 and 45 minutes.

If this had been my K2 I would have checked for dry/cold solder joints but since this is a factory built module I chose so far to leave it alone.

I'd contact Elecraft support and see if they would exchange the KIO3 module. I suppose you have tried with a different serial port? It might be that which has the warm-up problem.

[wayne burdick]

Sounds like a problem with the negative-voltage generator for the RS232
driver. Please contact customer support for a replacement KIO3 module,
and return the old one if you don't mind.

73,
Wayne
N6KR

LB3SA wrote:

>
> I have a K3 with all modules except transverter interface. The radio
> does
> not communicate with the PC (or Mac) before it has been on for about 45
> minutes - consistently. I turn on one of my rig control/logging
> programs
> or K3 utility right after the radio is turned on. Without touching
> anything the communication does not start to work before the radio has
> been on for between 30 and 45 minutes.

---

http://www.elecraft.com

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