Sorry, but I did not look at your link until after I sent my response.
While that DIP version may work in a K2, I doubt that it can be squeezed
into a KX1.
73,
Don W3FPR
----------------------------------------------------------------------------------------------
Scott,
From what source? The latest was that WA3AAL is also SK.
73,
Don W3FPR
On 6/9/2020 9:38 PM, SCOTT MCDONALD wrote:
http://www.wb9kzy.com/gzb.htm
This Zerobeat kit looks like it’s still available, might be worth a
look. If anyone does please report back, I’m still banging away on my
KX1 as well
Scott ka9p
Make something good happen!
On Jun 9, 2020, at 4:30 PM, Don Wilhelm <[email protected]> wrote:
Tom Hammond N0SS's (SK) website is mostly intact thanks to the Mid
Missouri Amateur Radio Club. It is a valuable resource.
You can find the files for the K1 and KX1 CW Tuning Indicator (SMD
version) at http://www.mmccs.com/mmarc/n0ss/index_k1.html.
If you have capability to etch your own boards, Tom recorded full
size images. You might also try emailing Fred at FAR Circuits to see
if he can create the boards. I believe Tom may have used him as his
board supplier.
73,
Don W3FPR
On 6/8/2020 7:33 PM, Frederick Dwight wrote:
If you do a google search on KX1 zero beat indicator or cw zero beat
indicator you will see several circuits demonstrated. Some like the
one which uses the LM567 (non SMT) part and had
a white LED seemed to be good, much less than 100 Hz BW and had the
schematic, but some others seemed to be much too broad, perhaps
hundreds of Hz wide. My circuit
needed quite a bit of audio drive, so rigged up a small 500-500 CT
audio transformer and used the primary as a autotransformer to
double the audio voltage
to the circuit which did not change the earphone volume but enabled
the detector to operate without opening up the audio gain too much
on any of my rigs.
Good Luck Rick KL7CW
Sent from Mail for Windows 10
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