[Elecraft] [K2] Low sensitivity with variable-bandwidth filter

[Bill Coleman]

Yeah, this is looking more like a calibration problem.

I’m listening to W1AW code practice on 14.0475. As I cycle through the filters the S-units are roughly the same through OP1, 0.4 and 0.16. But on the 1.0 bandwidth, it is often 1-2 S-units lower. If I tune about 200 Hz lower, I get the same number of bars.

I’ll update you when I have a chance to do the calibration.

> On Jun 12, 2019, at 8:07 PM, Bill Coleman <aa4lr at arrl.net> wrote:
> 
> Fortunately, I found the Rework Eliminators easily.
> 
> Swapping out the KSB2 for the eliminators didn’t evidence a change in the CW variable bandwidth filter.
> 
> It’s weird, it appears to be working OK at the moment, but the CW 1.0 filter sounds weird. LSB and USB sound a little weird, too.
> 
> I wonder if the BFO calibration may be off. Perhaps I should do a CAL FIL and see where it leads me. Indeed, I probably should re-align the whole rig, it’s been several years since I’ve last done it. Ah, yes, September 2015 was the last time.
> 
> I’ve also had an issue with INFO 080 occasionally. When the rig is first turned on, I’ll get this. Earlier when this happened, I tore into the rig and removed every module. Still got INFO 080 on power-up. After the rig is on a while, however, it generally starts behaving. 
> 
> 
>> On Jun 11, 2019, at 5:37 PM, Don Wilhelm <donwilh at embarqmail.com> wrote:
>> 
>> Bill for receive, you only need the jumpers at J9 and J10 - it is quick and easy to do with bent wires if you do not find the rework eliminators is short order.
>> Those jumper wires will not complete the transmit path - only receive.
>> 
>> 73,
>> Don W3FPR
>> 
>> On 6/11/2019 5:03 PM, Bill Coleman wrote:
>>> I own a set of Rework Eliminator modules, so that should be easy.
>>> 
>>> I just have to find them….
>>> 
>>> 
>> 
> 
> Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
> Web: http://boringhamradiopart.blogspot.com
> Quote: "Not within a thousand years will man ever fly!"
>            -- Wilbur Wright, 1901
> 

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901