I exchanged e-mails this week with one of the new owners of INRAD with a suggestion about marketing an low-drift OCXO mod to fix the warm-up drift problem on the Orions and Orion II's, and he wants t
Maybe they're just low because the operators actually believe the 16 digits of precision they get from their calculators when they divide 1.2 by the sgrt of 47, and likewise believe the digital dial
I imagine there is a way to use an external GPS referenced10 MHz oscillator to stabilize a 44.45 MHz Master Oscillator, but I'll bet it would be expensive! The 10 MHz GPS stabilized part is a no-brai
Not too interested in (and never really noticed) 20hz drift. Would be more interested in Inrad mods to beef up the subreceiver, which is almost useless on a crowded band with strong signals. 73, Barr
What's wrong with Ten Tec addressing this drift problem in the Orion's??? George W2YJ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting
What's "wrong" is that they haven't done it. If TT offered a good OCXO option at a reasonable price, that would be fine. The TCXO they use is disappointing compared some other rigs - like the IC-7000
I already have the GPS stabilized frequency standard. But you're right that the hard part is "the rest" :-) Grant/NQ5T _______________________________________________ TenTec mailing list TenTec@cont
I'm sorry, fellas. I just see 20 Hz of long term drift as a problem at HF. Dave K8MN _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.
Tentec has this feature in their rx340 for a 10 mhz standard. I wonder how similar it would be for them to make this for the Orion and Orion II. Carl Moreschi N4PY 121 Little Bell Drive Bell Mountain
It probably wouldn't even need an OCXO, just a really stable TCXO like the 20 MHz unit Kenwood uses. I have one in my TS-870 and even though it does not run when the rig is turned off, it is still ro
I am using an HP 58540A GPS-disciplined OCXO with another brand of transceiver. Of course, stability is excellent but even the best GPS-based OCXOs are phase-noise-limited to about -145 dBc @ 1kHz.
Maybe I'm missing something, but could someone explain to me why I need to fight a 20 Hz drift? Seems like you guys are brainstorming a lot of ways to spend excess money when my solution would be to
Very good 10 MHz OCXOs are available on the hamfest circuit for ~$40, fix tuned. It's frustrating to have one of these but not be able to use it as the Orion reference. 73 Martin AA6E _______________
FWIW _ I have had two Orion II in my shack - one stays within 1 to 2 cycles at 15 mhz from cold to hours of contest or normal operation. The other one was abysmal (in relative terms) it moved about 6
Looks interesting and one that might be worthy of consideration. Here's a question: is the phase noise specification of the Orion dependant *only* on the phase noise characteristic of the TCXO, or ar
I do remember those days! SB-101, FT-301, Swan "three-drifty". I also remember coast-to-coast phone calls that cost more in a minute than I made in an hour and you couldn't hear the other person. Why
Very interesting! Did you ever take a look inside to see if there was a visible difference in the TCXO units? Ron N6IE www.N6IE.com (Formerly N6AHA) _______________________________________________ Te
PSK31, Olivia, and other digi modes DEPEND on stable signals on both ends. Old time boat anchors are not generally used on digi modes due to their drift and instability. Ken N9VV ____________________
OK Ken, but please define "stable". 50 Hz in 15 minutes is surely not too bad, is it? And if I understood the original post correctly, after 15 minutes warmup things are OK. Is there a spec on stabil
Sorry Rick, I don't have the spec for PSK31, but common practice requires that your signal vary only a few Hz (if at all). In fairness, there are instabilities in sound cards that can cause drift too