ADF4351 locked by GPSDO
When monitoring the ADF 1296.1 MHz on the 23cm DB6NT it showes an ugly broad humming signal switching the ADF to the internal ref the signal is a clear tone.
This ADF REF input needs a 10MHz TTL 3V3 blok fomat to drive ?
Deja vue with the 23cm XTVR of 30 years ago:
The 96MHz X-tal does not want to work at its designed frequency and is drifting in kHz range at 1152MHz. Since that project I avoid using single xtals since never ever they will work at the correct
frequency. Only use integrated Xtal ocillator modules since then
And the NE325 Gaasfet preamp likes oscillating way more then amplifying
nothing is changed...
I remember long time ago in the 80-ties when we still had exceptional tropo propagation to east EU
A pile of UA UR UC SP at 70cm CW on 23cm there was UA3LBO but
the 23cm Gaasfet preamp just could not handle the strong radar sweeps, every 10 seconds a radar was triggering the fet in self oscillation .
Meanwhile a struggle to get connected to internet
Sometimes every thing works fine like it should
I take my sleeping Laptop to QRL open it , it connects to the w-lan okay, I bring it home open it from sleep mode it will connect to my home w-lan and ready to go.
But for unknown reason some days these normal routines just do'nt want to work.
Every laptop/device will find a different way to malfunction in respect to W-LAN.
One laptop has i-net connected while the other at the same WLAN does say good signal! but no- internet must have to do with not finding DNS.
On lucky day's just short switching to an other w-lan and back is enough to get the system online again.
But on the harder days the only thing that helps is the re-boot procedure again the reset button is still very essential special in the WLAN world.
A third Laptop with Win10 regularly has this annoying issue
just does not connect after wake-up from sleep and needs complete reboot ..
it does connect to the Wlan that has i-net but say connected / no internet
btw Win10 on my older Lenovo X60 laptop (with dockingbay lpt com1 extra usb) workes very good
all hardware except wakeup Wlan
Software worked after the upgrade W7->W7 even better than before
f.i. the RTL SDR stick works reliable on W10 but in W7 it only worked sometimes and the sudden W7 rejected the RTL SDR software
the audio feedback problem seems gone after upgrade to W10
in W7 I had the problem that the line in signal or microfone was always monitored to the speakers resulting in backfeed. I could not fix that and this Laptop wasalmost useless for WSPR and other audiocard based software and that was the purpose I had bought this X60 + docking for.
If wired I-net would not bring so much extra EMC trouble into the shack I would have dumped the W-LAN malfunctioning devices
Radio without I-net is poor but it is a hate love relation.
The digital systems bring a lot of noise to the radio room.
An new issue with this Blogger: page won't publish instead I get a confusing row of drafts
made an active 10MHz filter to use the 10MHz output from the Trimble GPSDO but that failed
this ADF needs a 10MHz in ttl block shape
Filter using 2 MF tunable trafos +/- 4uH
amplifier part by PE1FOD
400mV tt out now sinus shape nice stable It lockes on the 80mV tt
The internal 10MHz is 1Vtt (open load)
this cirquit workes fine if you need an Ssinus shaped signal.
Now I know i need at least a 1Vtt TTL block form
a sinus shape will not work