Re: [Elecraft] K3/100 TX problem on 20m

Hi Paul, I'd say that our respective KPA3A TX Gain calibration values are similar enough. Having not had the bipolar PA model KPA3, I don't have a point of reference for whether your TX gain parameter values are reasonable or not. I would contact Elecraft Support and copy Keith, WE6R with a

Re: [Elecraft] K3/100 TX problem on 20m

Hi Mike, Thanks for the gain information. I am going to look at the the gain numbers and see if there is any correlation with the wildly different input impedances to the output lowpass filters. For reference, I found the input Z to the filters to be as follows: 160: 63.8 +J1.6 80: 35.7 +J5.1

[Elecraft] K3/100 TX problem on 20m

Hi. I had this problem in the recent past. It turned out to be an issue with my multiband yagi. It only occurred on 20m. Hope this helps. Jim EI4HH.

[Elecraft] K3/100 TX problem on 20m

Thanks again, Mike. My K3 has the bipolar 100w PA. I also have a properly-functioning K3S/100 with the CMOS PA. Just for comparison I ran the HP TX gain calibration on the K3S and it produced these numbers: 160m/19 80m/08 60m/10 40m/12 30m/13 20m/08 17m/08 15m/05 12m/10 10m/10 6m/06 The

Re: [Elecraft] K3/100 TX problem on 20m

Hi Paul, For comparison, here are the 50 watt TX gain values from the calibration I did last November when I installed the KPA3A 100 watt PA in my K3 (s/n 67xx): 1900 kHz TXGain HP 10 3750 kHz TXGain HP 06 5336 kHz TXGain HP 08 7150 kHz TXGain HP 08 10125 kHz TXGain HP 08 14200 kHz TXGain

[Elecraft] K3/100 TX problem on 20m

Sent from Mail for Windows Thanks, Mike. The 50w TX gain numbers are: 160m/32, 80m/36, 60m/48, 40m/40, 30m/32, 20m/18, 17m/11, 15m/08, 12m/05, 10m/05, 6m/02 Paul, K0PK __ Elecraft

Re: [Elecraft] K3/100 TX problem on 20m

I don't want to be here Yahoo Mail: Search, Organize, Conquer On Tue, Mar 5, 2024 at 9:15 AM, Paul Kent wrote: My K3/100 gives a high DC current warning when transmitting on 20m with power settings above 75 watts. Maximum output is about 80 watts and is unstable. All other bands perform

Re: [Elecraft] K3/100 TX problem on 20m

5, 2024 11:19 AM To: Michael Carter ; Michael Carter via Elecraft Subject: Re: [Elecraft] K3/100 TX problem on 20m [You don't often get email from dyno...@comcast.net. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] CAUTION: This email originated from outside

Re: [Elecraft] K3/100 TX problem on 20m

of the filters (either BPF or LPF) and the associated relays that select the filters. 73, Mike, K8CN From: dyno lab Sent: Tuesday, March 5, 2024 11:19 AM To: Michael Carter ; Michael Carter via Elecraft Subject: Re: [Elecraft] K3/100 TX problem on 20m [You don't often

Re: [Elecraft] K3/100 TX problem on 20m

Do the TX gain parameter numbers have meaning such as dB or are they just relative numbers ? 73, Hal W7YNC > On 03/05/2024 6:35 AM PST Michael Carter via Elecraft > wrote: > > > Hi Paul, > > Could you please post the TX gain parameters > recorded by the K3 Utility at the 50 watt level >

Re: [Elecraft] K3/100 TX problem on 20m

Hi Paul, Could you please post the TX gain parameters recorded by the K3 Utility at the 50 watt level for all bands? If there is a significant difference in those gain parameter values between adjacent bands (say 30 and 17 meters) and the value on the 20 meter band, that may be an additional

[Elecraft] K3/100 TX problem on 20m

My K3/100 gives a high DC current warning when transmitting on 20m with power settings above 75 watts. Maximum output is about 80 watts and is unstable. All other bands perform normally with full 100w output and normal current draw. (50 ohm dummy load) I have done the TX gain and wattmeter