[Elecraft] K2 with HRD freq wanders

[eric norris]

Dear Don and Elecrafters:

With KUSB I get the jumping freq display described earlier.  When I switch to my older Keyspan Serial Adapter, the freq readout on HRD stays rock solid--BUT the K2 then displays the freq, then the power, then the freq...at odd intervals.  The power number is going up and down by itself.  When I transmit with PWR set to 7 watts, I get a HI CURR message, the proper number of bars light up BUT the three bars to the right of those are half lit!  I've never seen that before.  When I disconnect the serial cable and kill HRD the K2 behaves like its usual marvelous self.  

What is going on?

When I first built the K2 about 6 months ago I tested it with the Keyspan adapter and all seemed well--but I didn't use it with a computer after that.

73, Eric WD6DBM



----- Original Message ----
From: Don Wilhelm <w3fpr at embarqmail.com>
To: Eric <gliderboy1955 at yahoo.com>
Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Sent: Mon, October 19, 2009 6:04:53 PM
Subject: Re: [Elecraft] K2 with HRD freq wanders

Eric,

While that test may indicate the failure is in the K2, as "Sportin' Life" from Porgy & Bess says "It ain't necessarily so".
If you have another USB to Serial converter available, try that first.

73,
Don WFPR

Eric wrote:
> Dear Don: 
> I should have mentioned that the same computer, cable, USB converter works fine with the TS-480 connected to HRD.  I think it must be in the K2.
> 
> 73
> 
> Eric WD6DBM
>