Thanks Jerry. PLL, DSP, and SDR implementation seems much improved over the past ten years for newer radios commonly available to/used by Hams. 73 es DX, Gary - AB9M Most receiver designs use mixers.
During the mid 1970's, U.S. ARMY FIELD MANUAL 24-18, Appendix M and other pubs referenced the Near Vertical Incident System antenna and its development to meet a 0 to 500 mile skip-zone free communic
Jerry, I quoted from a recent revision of FM 24-18 (my hard copy is dated 13 December 1984) but I do recall a TC (training circular) released between December 76 and mid 1980 while I had unit trainin
Gene, I recently asked the same question and found the board at http://home.earthlink.net/~wd7s/hv-2.htm . Its board only with a parts list and instructions but well worth the $45 for the high qualit
During the past weekend I participated in the phone Sweepstakes and observed high VSWR on my OMNI-VII while driving my Titan 425 using the published settings for 75 meters when operating between 3.8
Jim, I believe you have the answer as my TITAN 425, S/N 425-00516 (labeled as an export model) was sent back to TenTec for warranty work and upgrades shortly after I purchased it new from AD0S. The T
I use the recommended (by TenTec) method of tuning the TITAN 425.... alternate TUNE and LOAD for maximum power out for a given drive, increase/decrease drive and adjust TUNE and LOAD for max power ou
There are no individual tuned input matching circuits on a Titan 425. Basically the exciter drives the cathodes of of the two 3CX800A7s. The recommended feedline between the exciter and the amplifier
After careful review you are correct ("a rose by any other name is still a rose"..W.S.). 73 es DX, Gary - AB9M The manual I have shows individual input circuits called low pass filters on the input l
I'm probably missing something but it appears to me the only difference between the 75 and the 80 meter switched components is at bandswitch S1B where C19 (150 mF ) is switched out in the 75m positio
right C 18 not C 19..... using the 75 m switch position the LOAD control is always at 10 or full mesh (not enough total capacitance)... using the 80 m switch position the Load control is at 2.5 or so
My Omni VI+ which I sold last summer apparently had this symptom on one band and was sent to TT by the new owner for repair of the band pass board. 73 es DX, Gary - AB9M My OMNI 6+ has a power issue
Wayne, He didn't say how much to repair but I'd bet by the time you pay to ship it to TT, tech labor, parts, and return shipping, you'll have $150 invested. Here is the relevant part of the message I
In this case (my old OMNI VI+ after I'd sold it and the new owner used it for several months) it was a 20 meter problem. The OMNI VI+ I had was ordered from TenTec in May 2000. The OMNI VI+ was disco
Yes, the OEM ICs being out of production was one of my reasons for selling my OMNI-VI+. But there should be a replacement solution even if its a new small board with several PICs to accomplish the sa
Thanks John, For those needing/wanting a different bandwidth and/or mode in one VFO than in the other, it can be done rather easily. See http://www.tentecwiki.org/doku.php?id=588split 73, Gary - AB9M
Al and all, IF the Eagle is using the same "core" as the OMNI-VII (and it appears to from John Henry's post), bandwidth of each VFO is the same when the Mode is the same on both VFOs. To get around t
John, I think the easiest way is to contact TenTec and ask for the cables for the AUX Receiver modification for the 588. (No soldering or drilling required) Then purchase a FLEX 1500 (or similar mult
You'll need a computer to run the FLEX 1500. See their page http://www.flex-radio.com/Products.aspx?topic=F1.5k_features for details. It could be an older computer. 73, Gary - AB9M
Rob, I had a OMNI-C for about seven years (81-88) and used a solid state electronic keyer with it.... I had to modify the original keyer I bought to accommodate the TenTec standard. Almost any keyer