I hardly think so. I do not hear others reporting any Jupiter RF problems. ANY rig interfaced to a computer can have multiple paths of signal return that can present problems with unbalanced, or in t
OK, thanks, then it does have bigger wind load than a conventional Yagi to allow for the hollow element, I would think. Seems like a lot of effort that could have been done by fixed linear decouplers
Joe, Did you have any RF problem with the Jupiter? Your statement that the Icom 746 would be less prone needs explanation/clarification/ back up. Thanks and 73, Stuart K5KVH
Jeff, thanks for the account, however your RF problem sounds like RF got into the active preamp in the base of the D104 mike NOT the radio necessarily. This is a known problem of the amplified microp
Carter, You should not have radiation from the 450 ohm line if the line and antenna are truly balanced. Is your antenna an end fed Zepp? That one can have 10 per cent imbalance in the parallel feeder
Good point about rotation, guess you could get two directions without turning. But, not many do that long path vs. short path all the time?? You still have to have a rotor to do all possible directio
Thanks Dave, a very nice write up, but then as you describe the reeling out of the tape, I could not help but think of the DLT tape drives where a finger hooks onto the end of the tape and pulls it o
You can accept compromise in the element spacing but then you are back to having a less than optimum situation, just as you do if you have traps. Linear decoupling has not lumped elements with loss,
Point well made, and I agree. Just an aside, twisting parallel line exposes both conductors equally to outside influences and will improve the current balance. Surprising that you had so much trouble
Noise in multiconversion rigs--(160M and 80M) It is the width of roofing filters and the overload properties of active mixers in the modern rigs. Plus, probably more strong signals today. 73, Stuart
MOST computer software updates we do on scientific computers tell us to restart the computer after installation. This is a RESET to the system. Glad it got fixed, but always a good thing to try after
John, The 746 may be state of the art as of May, but Orion will be out later, and thus cannot be called that until it runs the lab. I know the guys in the ARRL Lab, and they do NOT scrimp on the test
good point Rick, obviously the review is a team effort. In fact some say they loan the radio around to several staff for home evaluations. 73, Stuart K5KVH
OK, the standard BNC is rated at 500 volts. At 50 ohms, that looks like 5 kW. (P = V squared over Z) But, if you feel concerned, you can get BNC high voltage version with about a one inch ribbed back
Good point Jerry!!! I just looked at the voltage rating which is the dielectric flash over obviously in this case. I have seen them used to 500 watts, but of course the duty cycle is a factor in a la
What size wire did you have between the Astron and the Jupiter? Was it the supplied Ten Tec cable? another failure point is any in line fuses that fail to be making good connection to the clips and t
Not true, the N connector pin is larger, maybe by a factor of 3 plus? Of course this is tricky, because of skin effect it is the area of the outside of the pin that is carrying the most current. Stua
Seems like time to post this to list, I had two queries this week! Please call them and check if they still supply, I have had no contact with them since 1998. 73, Stuart K5KVH -- Original Message --