Jorge, Since you have made adjustments to PA circuitry, I am guessing that you hear this hum on your sidetone during transmit? Maybe it is a power supply problem. Perhaps the filter capacitors are go
Is not the resistance dependant on the wire material (copper or other), cross section (gauge) and length, and not dependant on the core material? How can the core have an effect on resistance, other
Hi all, I have an Omni VI. When first turned on the CW TX RF power output is nearly 100 watts, and then after being on for maybe an hour it is down to about 60 watts. I have not yet got inside to mak
Could someone please tell where to find pictures of this. It had been posted before, but I cannot seem to find it again. Thanks, Ken N6KB _______________________________________________ TenTec mailin
There has been a lot of discussion about Omni's 1st IF filters, and the CW audio note that we hear using them. I want to state the situation in a way that might help understand it. When we have a fil
Hi Chuck, But doesn't the "ST" (sidetone) adjustment on the OMNI VI also adjust the BFO frequency? No. There are only five adjustments to the BFO and they are trimmer capacitors for "alignment" and n
Hi Rick, In many (perhaps most) applications it is desirable to have the non selected coax switch positions grounded. There are also some applications in which you do not want the non selected positi
I'm interested, probably for the 9 MHz IF. DE N6KB The question of this post is to see if other Tentec fans would like to join in a special order from INRAD for a 1000 Hz bandwidth filter in either o
There are a lot of performance reasons to choose the Omni-VI over the TS-2000 which no doubt others have already pointed out. In my opinion cosmetically the Omni-VI has it all over the TS-2000. I'm n
I guess that you can only install either the CW or SSB roofer, but not both. The CW bandwidth seems about right, but I actually wish they would offer a 1000 Hz option, that would be perfect for S&P,
The Inrad web site does not specifically say whether the roofing filter kit puts the new roofing filter in instead of the stock 2 pole 15 kHz, or in addition to it. However one can surmise, based on
Hi Jason, Now that you have had the Inrad roofing filter modification in you Omni VI for a while, I wonder what are your impressions? I don't know what kind of operating you do, so you may not have n
Omitting the resistors and substituting a quarter wave stub is not the same thing. In order for a Vee beam to be unidirectional, you have to terminate the ends in the characteristic impedance of the
Hi Bob, I have an Omni VI, not a Plus version. I'm pretty sure there is very little difference in their respective balanced modulators. The manual for it does not give a procedure for adjusting R3 an
Hi Jason, I have tried to send mail to you directly, off the reflector, and it bounces. I have questions about your experience with the Inrad roofing filter mod. Can you send me a message with an add
Hi all, I used my Hercules II and 9420 power supply in the ARRL DX contest this weekend. The amplifier worked great, never showing any signs of strain or overheating. The 9420 power supply got quite
Hi Phil, Thanks for the suggestion. I see how the currents to the four PA modules is monitored by the voltage drop across the 0.015 ohm resistors on the DC Distribution Board, and then combined toget
Thanks to all for the information. I have decided to open up the Hercules, check the individual power supply voltages (and hopefully not have to get into the 9420 to adjust them), measure the individ
Thanks again Phil. The PA module idling currents were not high. With the amp not keyed they were all zero. And keyed with no drive, they were all around 0.4 to 0.5 Amp. I now have them adjusted to as
I only see a U1, U2 and U3, all LM358N. There is a non-zero DC input on the + input of U3, with the amp on and not keyed. So I think that the DC offset may be coming from U1 or U2. I would replace th