thanks Graham -
I was thinking more of the deep search side - the inner workings of the QRPLABS DDS and PIC and how calibration is maintained whilst on constant carrier is the concern. Cal is normally done in a key up period and Im not allowing this to happen - so I reckon I may wander...may have to go back to the HP3336b and key that - and only use the Ultimate 2 on WSPR etc - Im tracking it with the Fieldfox and I appear high. \
Hours pass...
Yep it wanders without the cal period - so Ive cranked up the HP3336b and wandered onto freq but now GPS locked (from 0120Z) so I really should be phase steady. Id would use the word coherent except I cant spell it.
I really hadnt considered the keying sidebands till Markus mentioned it, but produces very pretty sidebands looking at dot 60 slow.
Running close to 600W output at this time but conditions still look poorish. I keep wandering back into the shack - its like baby watching...just making sure there are no flames. Actually this Deccas is nearly fool proof and I ran it for long time (weeks) at near full whack and didnt loose sleep. The station is nearly the same as it was in 2005..only the spiders have changed and Im now paying the house insurance and electricity bill :-) ERP should be around 2Wish at this time in the main lobe.
http://kl7l.com/KL7LSHACK.jpg
Laurence KL7L
From:
[email protected]To:
[email protected]Date: Mon, 25 Nov 2013 00:11:37 +0000
Subject: Re: LF: WE2XPQ OP32 136
Laurence
Phase / stability makes no difference to the Op
decoder performance , guard band
for OP64 is 100 mHz
, OP32 200 mHz , very unlikely to
drop within 200 mHz ! , 1 Hz
separation at OP64 could hold ~ 8
stations , afc will track the cross over's ,
plot would look like Clapham junction .
Good luck , 73-G,
Sent: Sunday, November 24, 2013 10:14 PM
Subject: LF: WE2XPQ OP32 136
WE2XPQ testing Op 32 136kHz - think Ive got the PTT and
controls keying now using the Ultimate 2 drive source - will hopefully be up to
600W in a few mins. Still driving the spiders out., so will let things warm up
slowly - around 35A loop current. Will see if Im phase continuous - the Tx is
"on" all the time and Im just switching the RF drive, Im justnot sure if
the gps driven freq stab/corrections occur when in Ulitmates "transmit"
mode. If so it may muck up the phase - We will see but Ive not seen
any transitions so far.
Laurence Kl7L Wasilla
Alaska
