Joel, Thank you for that explanation. I was puzzled because neither in the text nor in the block diagram of the test setup is there any mention of a tuner at the signal generator end, and I can only
Jim, What "bugs" me most about this issue is that it isn't Rocket Science - simple application of Ohm's Law will give you the answers. Take the figures for Wireman 553 ladderline which has #18 conduc
Joel, Then that puzzles me even more ! If you made a change to the line and then adjusted the single tuner at the load end, the impedance terminating the line changed. If the terminating impedance ch
Joel, With respect, it's not the end of the story - the generator *can't* always have been delivering all it could to an optimum load if that load changed with differing line conditions. Let me take
I wouldn't expect the Accessory connector to need a jumper. From the look of the schematics, the remote VFO system - unlike the Corsair - leaves both PTOs running continuously; they simply switch the
I don't think that indicates a problem. I have two CorsairIIs - one of them "turns off" at 7.5 on the RF Gain, and the other one at 4. 73, Steve G3TXQ _______________________________________________
Rick, Hover your mouse over the top of the photo; you should see a "drop down" with station details. 73, Steve G3TXQ _______________________________________________ TenTec mailing list TenTec@contest
I suggest researching shielded grounds very thoroughly; http://www.w8ji.com/coaxial%20currents/coaxial_line_and_shielded_wires.htm To quote: "It is electrically impossible to shield a ground lead." 7
Yes, vertically polarized signals also undergo ground reflections; however the reflection coefficient magnitude and phase are very different to those of a horizontally polarized signal, which is why
Perhaps I could comment: I can't claim to have made exhaustive measurements. What I _have_ done is fit the DDS to one of my remote VFOs so that I can A/B switch instantly between the original interna
Even measuring the load impedance wont immediately tell you what are the best settings, for a couple of reasons: 1) The HiZ / LoZ labelling is a misnomer for an L-network tuner; for example, for a lo
It might or might not be a high impedance load for the tuner, depending on the length of the ladderline. For example, an 80m half-wave dipole used on 40m will have a feedpoint impedance of 4000 Ohms
Jim, Those are important points of clarification that you raise!! I frequently hear folk commending ladderline-feed for a multiband doublet on the basis that "ladderline handles high SWR much better
Bob, One word of caution - you need to treat N6BV's loss figures for twin-wire lines with a big dose of scepticism; they are often a factor 2 optimistic! It's the case in every ARRL Antenna Book I ha
I hear the 21,320 kHz "birdie" on both of my CorsairIIs at pretty high level. The birdie tunes at 3 times the VFO rate; I believe it is the 9MHz product caused by: 3 x VFO - HFO = 3 x 5,330 - 6,990 =
The exact dial frequency where you hear the tone can vary slightly depending on the frequency of the HFO crystal oscillator. A 500Hz error in the HFO would place the spurious 1kHz from where it was e
Pretty high Q values can be achieved if you choose the toroid mix and the winding spec carefully. For example, according to the Micrometals Q Curve Application Information book a T200-6 core wound wi
I was responding specifically to the comment from K4TAX: "I'll take an air-wound inductor over a toroidal inductor any day, space available. The typical loss in an air-wound inductor is IR loss where
N6KB beat me to it! My schematics show nowhere the 4 supplies are connected together; but you do need a fifth, low current, supply to power the DC distribution board in the amplifier. In the 9420 the
The amplifier in question is probably better known as the "Norton Amplifier" after its inventor Dr David Norton. Steve G3TXQ _______________________________________________ TenTec mailing list TenTec