It looks nice and small, but the 'killer' for me would be that it doesn't measure complex impedance ... unless I missed it in the manual! Steve G3TXQ _______________________________________________ T
Is the problem present on SSB (normal), SSB (reverse), or CW? Or all 3? Steve G3TXQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.c
I wonder if anyone can confirm if the PA assembly used in the CorsairII is the same as that used in the original Corsair. I believe it may be, and that the same one may also have been used in the Par
If the problem is still present when the Offset Tuning is off, it can't be the balance of those pots. With the OT switched off, the *same* pot signal is used both for Tx and for Rx. 73, Steve G3TXQ _
Just follow the schematic! Steve G3TXQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
Barry, When you have OT switched off, the PTO varactor voltage comes from an internal pot on both Tx and Rx. The front panel pot is inoperative! When you have OT switched on, the PTO varactor voltage
Yes, it does - on both Tx and Rx, so it can't cause a shift between Tx and Rx when the RIT switched off. 73, Steve G3TXQ _______________________________________________ TenTec mailing list TenTec@con
Thanks for your help, folks - they do indeed seem to be identical. I had the opportunity to purchase a module out of a Corsair, and wanted to be sure it would make a spare for my CorsairII(s). Thanks
You might try experimenting with the value of R46 - it determines how fast the agc will track a varying signal. If it's a very high value, or is removed entirely, the agc couldn't track a varying sig
Scott, Can you describe in more detail the "popping" you are hearing? At what part of the keying cycle do you hear it? I have a couple of CorsairIIs and I can't say I've noticed that problem on eithe
I've had my 238 for many years and am not about to replace it. In 2009 I bought the balanced Palstar BT1500 to use alongside the 238 on my open-wire fed doublet. After extensive comparison measuremen
In a typical coax line, the dielectric losses don't exceed the copper losses until you get above 1GHz. At HF line losses are overwhelmingly copper losses, and dielectric losses can safely be ignored.
Here's an interesting paper by Wes Stuart N7WS on the topic: http://www.scribd.com/doc/7132619/Ladder-Line If you look at his Equation 2 for the total loss of twin line you can identify the copper lo
If you look at the technical data for a Belden solid dielectric RG58 (say 8259) and compare it with a foam dielectric RG58 (say 7807) you'll see that the centre conductors are significantly different
Here's some calculations to support that last comment: Solid dielectric coax Vf=0.66 and foam dielectric coax Vf=0.85, therefore relative dielectric constants must be 2.29 and 1.38 respectively. So,
When I replaced my CorsairII PTO with a DDS, I measured a *decrease* in close-in phase noise! What increased was the number of "spurs" on the VFO signal. Most of those spurs tune at many times the fu
The article by Wes Stewart that I referenced earlier: http://www.scribd.com/doc/7132619/Ladder-Line was published in the ARRL Antenna Compendium Volume 6. It shows measured losses for various commerc
Rick, When W1ZR's article appeared in the November 2009 QST it was *very* controversial. Here's an example of the typical debate it engendered: http://www.eham.net/ehamforum/smf/index.php?topic=44059
Hi Joel, Nice to hear from you! The ladderline loss figures quoted in the Antenna Book - which I believe are also repeated in TLW - are out by a factor 2. It's very easy to demonstrate that with a si
Joel, I'm giving some thought to how I would replicate your experiment to satisfy my own curiosity, and I have a couple of questions about the technique you used. From your article I gather that when