What are the advantages of using an external frequency reference, such as from a GPS receiver with a single RX-340? How important is that kind of accuracy for HF reception? Also, how far off in frequ
Jim, When I was first hooking up my RX340, I accidentally plugged my HF antenna into the external reference input. The front panel LED actually lit indicating that the RX340 had detected a 10 MHz ref
The late Rear Admiral Grace Hopper used to give out 'nanoseconds' at her lectures. They were foot long pieces of wire, indicating the distance an electron can travel in a nanosecond. So I would guess
It looks like this site is being hosted by a service that limits the amount of data downloaded by visitors. It looks like it might be a free hosting service with very limited data transfer. I visited
Bummer, I thought from the picture that it would directly mount in the 19" rack I use for my RX340. Mark high, with a thumbscrew on the left and right edges at + panel into which the unit is inserted
It looks like your Orion may be out of spec. TT published specs on Orion's temperature stability is +/- 10 ppm, At 10 MHz, that is 30 Hz. Your Orion had an excursion of 989.0 - 953.7 or 35.3 Hz. One
I had a typo in my original post. I meant to say +/- 3 ppm and I thought that was being generous. 1 ppm sound more likely for a TOL rig such as the Orion. With +/- 1 ppm, the excursion should be less
Oops. You are correct given my email. What I meant to say was the spec is +/- 3. And reading further. that's being generous. That's supposed to be the drift over a temperature range of 0 - 50 C. I do
Good point. We expect everything to be instantaneous. FWIW, the TT website doesn't make any statement about frequency accuracy requiring a warm-up period. Mark happens in the first hour after power o
I got my Z3801 yesterday and checked it out. How/where did you install the antenna? I think I need to put the antenna on the roof so that the house doesn't block the sky. For testing purposes I set t
Guy, Here's an alternative you may want to consider if your 740 is still meeting your needs as an amateur transceiver. Take a look at the TenTec RX320. New, they are only around $320 (and TT may even
Eric, Thanks - but does the antenna need a ground plane? I suspect it was designed to mount on a vehicle roof which would act as a GP. On the K8CU website, one person mentioned mounting in a pie plat
Other Eric, Thanks for the tip on the patch antenna. I really don't understand these things yet. That will make the mounting easier. I think a couple of pieces of angle aluminum will do it. BTW, do y
Paul, Try a null modem adapter. For my first attempt, I just connected up the 3 wire cable that I used to control the RX340. It didn't work, but when I put in a null modem adapter (which essentially
Boy, 2 el on 40 at 120 ft and 6 operating positions for a casual opertaion. I'd hate to see what happened if you got serious about things <g>. KLM is gone. M2 antennas makes some replacement parts fo
I received my HP Z3801 last week. To keep things on topic, the intent is to use it as an external reference for my RX340. I mounted the antenna over the edge of my garage roof. That was the easiest p