PIN-diode amp might be OK, but most current QSK amps (mine included) use vacuum relays. I simply don't like the idea of those relays using up their finite number of lifetime cycles every time I send
Hi Jim, for air quality and reduce the noise it makes. That muffler wears out every few years. I have to buy plugs every year or two. Should I switch to a car that doesn't need either? Should I switc
Hi John, which will go in the Orion 2.4 slot, the 2.4 will be moved to the 1.8 slot and the 1.8 will be moved to the 1.0 slot, the 1.0 will be moved to the 500 slot and finally the 500 will be put up
Not important...you still have the QSK cult chant: "QSK...dead relay...QSK...dead relay...QSK...dead relay." If there were only a few more of you folks we could all buy stock in relay companies and
K5MO: a lot of disappointment! John you should have been at that convention in Boston a few weeks ago...they needed to hear that worse than us! What we really need to do is declare a contest where ev
Last week I promised some plots to show the effectiveness of PBT in combination with the Inrad 762. I've included these on my Inrad page here: http://users.vnet.net/btippett/inrad_.htm (scroll down)
in Sevierville, TN on Fri. Sept. 24 and Sat. Sept. 25, 2004. Has anyone seen an agenda for this? I can't seem to find more details on the Ten-Tec website. 73, Bill W4ZV
Hi Bob The other reason for this message is a heads up to all who are contemplating purchase of an Inrad #762 filter. I received mine yesterday and have not installed it in the 1kc position yet. They
Do we have any idea how good the Inrad 762 might be at very close spacings? Let's take another look at the Inrad plot below. I've marked points below which show a total bandwidth of about 1300 Hz at
Hi Mario, Would Orion then have "astonishing" IC-7800 performance? 73, Bill W4ZV BDR @ 5 kHz: Orion 130 dB IC-7800 115 dB IMD @ 2 kHz: Orion 92 dB IC-7800 78 dB
Hi Chuck, based receiver has a dynamic range of 92db. The Orion either has an incredibly low noise floor or, able to handle extremely high strength signals. Its a little of each, I expect. Orion is m
transfer the frequency. A two second press could be used to transfer mode, bandwidth, agc, etc. EXCELLENT suggestion Tom! I hope Gary will consider this. 73, Bill W4ZV
the 1khz filter in the Orion, has anyone looked at modifying the IF board to include all filter position in parallel? could cut a couple of traces, re-route the signal and add a nand gate and a coupl
http://www2.arrl.org/members-only/contests/results/2004/DX-CW/ I believe Scott also has the high-claimed SOABHP score for the 2003 CQ WW CW . Nice job using our favorite radio! 73, Bill W4ZV
Hi Rick, what Bill, W4ZV told us to do. (That's why I said do as Bill says, not as he does. Bill doesn't work much SSB). I still operate too much SSB to eliminate the 1.8 kHz filter. Sometimes here o
Al (W6LX), your comments are right on the mark. There was an interesting discussion recently on eHam on this very topic: http://www.eham.net/articles/8608 Of all the manufacturers, Icom seems to prov
Hi Duane, That "someone" was me! However, since I have the 1800 Hz filter, I'll just set my 1000 aside. For casual use, the 1800 Hz will work fine for DSP>750. The format in the reference below is te
Hi Lee, just put a pad in the signal line with the 500hz filter? In fact I tried putting a 6 dB pad on my 500 Hz filter input. That did compensate the gain correctly, but I really don't know if it co
Now available for ARRL members only at: http://www2.arrl.org/members-only/prodrev/pdf/lab/ic7800.pdf KC1SX added some new 1 kHz data to the QST Product Review: BDR: 95 dB (graph on page 19) IMD: 66 d
Hi Mario, Speaking of cost, for >12 dB less $$$$$, you can buy an Elecraft K2, get identical IMD and ~20 dB better BDR at 1 kHz spacings. But the K2 is not the "astonishing unparalleled ultimate" so