K2 SSB wider filter mod

[VicWinton]

Hi Folks,

 

I am not happy with the original 2.2khz ssb filter in my K2 (serial 1926).
It sounds very restricted and fine tuning the BFO setting is quite critical
and tx audio ends up either too bassy or too toppy.

 

I'm thinking of fitting the wider ssb filter mod kit . That's the
replacement xtals and changed caps.

 

Has anyone done this ?

 

If so - are you glad that you did or do you wish you had never tried ?

 

Has anyone compared the 2.4khz with the 2.6khz settings and if so any
comments ? Which do you prefer ?

 

I should mention that I tend to like a wider filter - I was spoiled by the
lovely audio from my old Atlas 215 (vintage 1970)

 

TIA

 

 

73,  Vic GW4JUN

 

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Bill K9YEQ]

See below.

73,
Bill
K9YEQ

-----Original Message-----

Has anyone done this ? [WRJ]  YES!!

 If so - are you glad that you did or do you wish you had never tried ?[WRJ]
I am glad!!

 
73,  Vic GW4JUN


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Dave Johnson]

When I ordered a KPA500, I also ordered the capacitor and crystal kit
to do the wide band SSB mod on my K2. I plan to do the mod tomorrow
(13th Dec) and will let you know how I feel it worked out, both from
the point of view of the mod itself and audibly.

My K2 has already had the 2nd filter "flattening response" mod done,
which makes some difference.

Having listened to a number of K2s transmitting on SSB (mostly on the
UK Elecraft Net), those with the original bandwidth sound poor and the
wider ones sound good... So hopefully mine will improve. I will record
a chunk of the band around my K2's transmission on my Perseus SDR
which will show both the transmitted envelope and allow me to listen
to it afterwards. I will then compare the transmission with the
modified version.

If you like, I can arrange a sked with the K2 and you will probably
hear the difference yourself.

73 Dave, G4AON
K1 no. 1154, K2 no. 1892, K3 no. 80, KPA500 no. 573
-------------------------------------
I am not happy with the original 2.2khz ssb filter in my K2 (serial 1926).
It sounds very restricted and fine tuning the BFO setting is quite critical
and tx audio ends up either too bassy or too toppy.

I'm thinking of fitting the wider ssb filter mod kit . That's the
replacement xtals and changed caps.

Has anyone done this ?
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html