-40 dB isolation between antenna ports (including the RX antenna ports) has been typical with every ham transceiver that I've had a chance to measure to date. This needs to be taken into account when
Ron -- I would prefer to be able to lock the Orion's master oscillator (with a long averaging interval) to an external GPS-based 10 MHz standard -- without degrading the very clean phase noise charac
I wonder what THD looks like for a carrier in CW/SSB detection and a bandwidth customary for those two modes. I've been running with no hang time and very fast dB/s... but maybe I'm tolerating more d
The TCXO manufacturer has a sister part that can be slaved to an external standard. I have no idea what this would do to the phase noise performance of the oscillator. -- Eric K3NA on 05 Jul 27 16:53
Hi Eric -- We have an AM station about 2 miles from the W1KM site. It's small but runs 5 kW during the day on 1420... enough to mess up antenna analyzers hooked to the low band verticals... and enoug
Hi Eric -- Well, I'm going to stick my neck out on the reflector and describe what I have been using for SSB contests. Probably some other people can point out how my settings can be improved. a) In
Hi Bill and Barry -- Sounds like we have similar mental models. I haven't gone as narrow on bandwidth but see no reason not to in crowded conditions. I agree with Bill's comments about different thre
Actually, this is NOT such a good approach. From an ergonomics viewpoint, the press of the A>B button is an example of an unrecoverable, destructive action. The frequency of the B-VFO is wiped out: t
Hi Grant -- Yes, you're missing a point which I didn't make clear. Of course overwriting the B VFO frequency is the desired result when one purposely pushes the A>B button. The human factors issues c
Hi Grant -- Yes, pushing the wrong button is an error on the part of the user -- 'cockpit error', as you put it. One of the characteristics of man-machine interfaces that folks find "easy to use" vs
Hi Pete -- If you experienced this kind of racket, why not file an interference report? A systematic effort to identify skywave interference from BPL systems could be helpful. We know where some of t
Obviously one can't ID a BPL signal nor DF it accurately if it is skywave, so those parts of the report will be blank or rough data. The point is to document and record reception of interference that
Paul -- This is one of those areas where strong, and different, personal preferences exist. All these various systems of sending code exist because each has an audience. You will find that one or two
WinKey can be used with single-lever paddles. I think it costs about $35 and is available from K1EL??? (I'm working off memory -- do a google to verify this.) -- Eric K3NA Hi Paul...Dave here. Well h
Yes, I would be interested in something along the lines of a Pelican case. It should be very rugged -- able to handle airline luggage abuse. It should be watertight, as the Pelican case is. This is i
If you have an antenna analyzer like the AEA or MFJ units, the best way to tune your matchbox is to connect the antenna analyzer. These analyzers put out about 1 mW and you can see exactly the impeda
Hi Rick -- I wasn't suggesting using an antenna switch to connect the antenna analyzer or the radio to the tuner. As you pointed out, many switches have inadequate isolation. What I had done in the p
Hi Sinisa -- I have read through your guide. It's very good. One observation that you might want to check. According to KF6DX's description of the Orion AGC systems, once a signal has crossed the AGC
Hi Carl -- Can you run two instances of the program to get control of two Orions? I have a SO2R contesting station so that's why I'm curious about this. I'll also check the website. Thanks. -- Eric -