A correction to my previous post: Once the internal collector current metering and forward power metering is calibrated, you can use the internal metering as a reference to adjust the OVERDRIVE LED t
What do you mean by "300 watts out on SSB"? How are you measuring it? 300 watts indicated by a slow responding D'Arsonval meter movement, could be 500 watts peak. If you can get 450 watts CW from the
It's time for another episode of the ongoing saga of N6KB's Omni VI transmit power output problems and troubleshooting. In the previous episode I had come to the conclusion that the low output power
Hi Jim, That 300 watt mark on the bar-graph indicator means nothing if the circuit is not calibrated to a known standard. On the CONTROL BOARD there are three potentiometers that are fed by the forwa
Hi all, I got the 30 meter XTAL OSC. coil removed, slug unscrewed, coil reinstalled and slug put back in with dental floss to make the fit tight enough to work. I have adjusted all of the XTAL OSCs,
What you need are TWO Birds. Running them cascaded you will discover that the input Z of a Bird feeding a matched load isn't necessarily a matched load. E.g. the Bird changes the impedance seen. To m
Okay Jerry, I'll try it. Since we were talking about a Ten-Tec Hercules II amplifier, what frequency between 1.8 and 29.7 MHz would you suggest I try, in order to see the most significant effect of t
The Bird Thruline RF Directional Wattmeter model 43 accuracy is specified as +/- 5% of full scale reading. That means that if you have a 500 watt element (model 500H) measuring the output Ten-Tec Her
Jim, My data is straight out of the instruction book for the Bird Thruline Wattmenter model 43. The accuracy is stated as +/- 5% of full scale. Pure and simple, with no mention of what part of the sc
Hi Geoffrey, Those who have the initiative to try CW will be able to make plenty of QSOs with a 2.8 kHz filter. Actually they can't. I am a special case, I can't copy cw with a second signal, whether
"I believe the LDG is rated at 1000 watts as per its model number." Be careful! There are many products out there with model numbers which suggest certain power ratings, but the real ratings are much
One thing I have yet to try is running a pair of 75 ohm, with both coaxal shields tied together, with the shields grounded in the shack...in lieu of the 400 ohm feeders...to the outside 600 ohm feede
I have both a model 301 remote knob and computer serial communications connected to the DB-25 connector on my Omni VI, and it works fine. I had to make a 'Y' adapter with three 25 pin D connectors. I
"N" connectors, when properly installed have much less loss than so called "UHF" (PL259/SO239) type connectors. At HF the loss may not be much for a brand new, shiny PL259, and the extra care and exp
I was once bench testing a brand new pair of 2 GHz radios. They were Motorola Starpoint radios, capable of carrying perhaps a couple of dozen 4 kHz mulitplex channels. The transmitters put out about
The bulbs should be 6.3 volt types. Sometimes these get replaced with 12v bulbs by mistake. And sometimes they get replaced with higher voltage bulbs intentionally, to make them last longer. Mouser,
Hi all, I am having some difficulties with my Omni VI. The first noticed problem is low TX power, particularly on 160 meters. The power is near enough to 100 watts on 80, 40, 30, 20 meter bands that
Way back in the earliest days, when Alexanderson Alternators were used to generate 20kW of RF, The one I visited in Grimeton, Sweden put out 250 kW Alexanderson himself often slept regularly in his c
Hi all, I have not carefully read every post in the recent 95% coax shield/TVI discussion, so perhaps someone has already stated the following. Even so, perhaps it bears repeating. TVI causes can be