Merv, My VI/Opt 3 is factory original all the way since 1993. I have only one 20M birdie @ 13.999 - no others noticeable, even without an antenna connected. When it was back to the factory for the Op
Ten-Tec Model #216, stock code 48161, 6-pole RTTY filter for 9 MHz IF (9.002210 CF), 500 Hz 6-dB BW. Postal MO or certified bank draft for $75, shipped Priority Mail CONUS. Please reply direct. 73, D
Model 564 OMNI VI+ in absolute PRISTINE/MINT condition (not even a speck of dust of finger print!), 01/2000 S/N, with factory #81606 TCXO Logic Board and version 1.03 LOGIC and 1.0 DSP ROMs, #257 voi
Ten-Tec Model #216, stock code 48161, 6-pole RTTY filter for 9 MHz IF. 500 Hz 6-dB BW, 9.002210 CF. Postal MO or certified bank draft for $75, shipped Priority Mail CONUS. Reply Direct ... Please NO
Jim, You have correctly assed and describe the relative performance of the Inrad vs. TT filters. My lab. assessment is attached! The attached µSoft Word file compares the TT #217 (9 MHz/500 Hz/750 Hz
Bill, One more file I neglected to attach. This data actually shows that the VI+/Opt-3 with a 2.1 kHz roofing filter mod installed SURPASSES the IP3 IMD performance of the Orion! 73, Dave, K1FK Fort
This is to clarify my rationale for using the PROC switch to activate the Inrad roofing filter modification. For those not familiar with the history of this, I performed this modification to my Omni
Hi Clark, Just to add some credible data to the discussion I have attached data from three measurements I made on Inrad and TT filters. The newer TT filters seem to be quite comparable to the Inrad i
Scott, For a complete technical discussion of the Inrad filter and the reasons and installation instructions, see: http://users.vnet.net/btippett/inrad_.htm 73, Dave, K1FK Fort Kent., ME ARRL Life Me
Crystal filters can and [DO] contribute towards IMD! I is not just the additional amplifier in the Orion that should be questioned in regards to IMD when selecting the 250/500 Hz filters! 73, Dave, K
Kirb, The VI/VI+ T/R relay will easily handle that level and current. The limiting factor in the VI/VI+ T/R circuit are two capacitors (C8/C14) across the NO relay contacts, which are 50 WVDC devices
For the record, I too was apparently a "target" of Mr. John Swisher, KE4CCI in December 2004/January 2005. On 12/15/2004 he responded to my posting to sell a #217 filter. Two days later on 12/17/2004
An Inrad roofing filter mod. installed in the OMNI VI/VI+ renders the NB function inoperative. The reason for this is that the noise pulse is stretched in width by more than 2000 times as it passes t
The recent discussions on the reflector regarding Temperature Compensated Crystal Oscillator (TCXO) versus Oven Controlled Crystal Oscillator (OCXO) in the OMNI-VI (retrofitted) and VI+ (retrofitted
Model #217 9 MHz - 500 Hz BW filter. Factory new 1/4/2005 - never installed. Includes installation instructions for OMNI V/VI/VI+ and Orion transceivers and response curves. $80 shipped Priority Mail
GIGAVAC http://www.gigavac.com/products/relays/ham has introduced a line of "affordable" vacuum relays for amateur radio applications. The G41C HAM is a $75 replacement for the very expensive KiloVac