Hi all, Bob said "Most ham radios are reasonably accurate but resolving less than 100 Hz is based on many variables and assumptions. Even the number of digits in the software calculations are truncat
Lights on? Any sound at all from headphones or speaker when audio gain and RF gain turned up? When PTT pushed or switched to transmit mode by VOX or CW keying do any relays click? (I assume a Corsair
Are you saying it works with external VFO but not internal VFO? I suggest you use a general coverage receiver to listen for the various oscillators, VFO, BFO and band select oscillator and see if the
If you really mean 0.22 Hz you should consider yourself fortunate and not mess with it. If it is 0.22 kHz off you can make it better, but not much. I agree with Bob that you should check it on all ba
I love the Omni VI and have two of them myself. I am a competent troubleshooter of electronics having worked as a technician and engineer on radio communications equipment, radioastronomical instrume
There are two potentiometers that will have an effect on the forward power indicating bar graph calibration. R1 and R4. I recommend that you do not mess with R1 (without some more information) becaus
I'm responding with questions, contrary to your request, but hopefully helpful. Have you unplugged used DeOxit to clean, and replugged all the connectors? Have you tried reflowing any of the solder j
Hi Jim, I don't know how long you have owned and used the Omni VI. If it is new to you, you may not be completely familiar with the interaction of the PBT adjustment and use of narrow filters in both
Would not running the 9420 from 240 VAC eliminate the problem of mains voltage going high in the case of failed neutral wire? I find that mine runs better on 240 VAC than 120 VAC, even though I have
Ken suggested checking receive function in LSB (not USB) because LSB receive is the same as CW receive, using the same BFO frequency, same BFO crystal.
I have a schematic for my 9420. Not sure if I have more than a schematic. It is in the Hercules II manual. That may be the place to look for info on the 9420. I'll take a look at mine and tell you mo
Looked in My Hercules II book and found a complete manual for the 9420 power supply. If you still haven't found the information you need I can probably help you..
Hi Jim, You're right about being able to use the N-1 and N-2 functions when you put optional filters in those two slots on the 9 MHz IF board. One thing to remember is that filters in 9 MHz IF do not
Hi Barry, Unlike many PLL based radios, not all of the oscillators are locked to one common frequency reference in a Ten-Tec Omni VI. The band selecting oscillators and the VFO are locked to the 20 M
Depends on what test equipment is available.I suggest you adjust the filter by itself at low power levels, the kind that come out of a signal generator, not the output of the radio's driver board It
The MAX 7219 chips on the LED DISPLAY DRIVER BOARD appear to be available from Mouser. Please excuse if you have already changed those. Seems like a failure there could be the cause. DE N6KB
I made a fairly comprehensive list of Ten-Tec filter model numbers, stock numbers, bandwidths, etc. It has been posted on a website. Using only my phone it's too hard for me to find. If you don't fin