I figured out why it takes so much gain. Somewhere along the line, I switched
sounds cards and I was outputting to the wrong channel. Amazing that I was able
to get any transmit at all.
> On Jan 3, 2023, at 9:55 PM, Bill Coleman via Elecraft
> wrote:
>
> Well, I’ve half-way figured it out.
My knowledge is from being a windows user. In windows when running audio
type digital modes there are 3 points of adjustment. The sound card gain,
the software gain and the line in gaim. On some external sound cards there
is also a pot to adjust one the sound card, that makes 4points. And
Well, I’ve half-way figured it out.
I increased the LINE gain to the point where I can get 4-5 ALC bars, and now I
get plenty of power right away.
Still trying to figure out why it takes so much gain, but I’ll puzzle that out
given time.
Thanks everyone.
> On Dec 30, 2022, at 1:24 PM, David
It could be a momentary high SWR when starting a transmission because of
some slow switching somewhere in line. In K3 Config, try increasing the
value of Tx Dly. I have to set mine at 14 because of a slow amp.
Dave Hachadorian, K6LL
Yuma, AZ
On 12/30/2022 8:34 AM, Bill Coleman via Elecraft
And old familiar problem.
Re-do the TX gain calibration. Some of the trimmers in the BPFs are known to
change value over time. Some of the ones in my K3S had to be replaced.
Then make sure you have enough audio drive to achieve the "4-5 bars"
requirement.
See:
nt: Friday, December 30, 2022 16:46
To: Joe Subich, W4TV
Cc: Elecraft
Subject: Re: [Elecraft] [K3] Odd transmit power output behavior on TX DATA
All bands.
Power calibration was done about 9 months ago.
> On Dec 30, 2022, at 11:19 AM, Joe Subich, W4TV wrote:
>
>
> One band or al
All bands.
Power calibration was done about 9 months ago.
> On Dec 30, 2022, at 11:19 AM, Joe Subich, W4TV wrote:
>
>
> One band or all bands?
>
> Have you done the power calibration routine recently?
>
> 73,
>
> ... Joe, W4TV
>
> On 2022-12-30 10:34 AM, Bill Coleman via Elecraft
All bands.
I have done the power calibration routine at least once in the last nine
months, on both radios.
> On Dec 30, 2022, at 11:19 AM, Joe Subich, W4TV wrote:
>
>
> One band or all bands?
>
> Have you done the power calibration routine recently?
>
> 73,
>
> ... Joe, W4TV
>
> On
One band or all bands?
Have you done the power calibration routine recently?
73,
... Joe, W4TV
On 2022-12-30 10:34 AM, Bill Coleman via Elecraft wrote:
I own two K3/100 radios. One is SN70xx, another SN87xx. On one of them, I
observe an odd behavior with transmit power output.
Even
I own two K3/100 radios. One is SN70xx, another SN87xx. On one of them, I
observe an odd behavior with transmit power output.
Even though I have an antenna matched to nearly 1:1 VSWR using the internal
tuner, any time I change bands, or adjust the power level, SN70XX does not put
out full
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