Several days ago I acquired a beautiful Omni 6+ (564), and love the radio One glitch that I notice is that occasionally the speed of the keyer will vary slightly (speedup by maybe 1-2 wpm). Since the
Thanks to all who responded. I found the fix described in the TT Wiki to be most helpful. I formed a small loop at the end of each lead of a 0.01uF cap, placed the outer pins of the header to the con
While tuning across 20m ssb with my recently acquired Omni VI plus I noticed what first appeared to be S5-6 splatter from a nearby signal. After closer inspection I realized that it was an FM modulat
Paul, Guess I'll let the external LPF do the work and not add an internal LPF on the receive side. Should be very easy mod, but I'll leave the radio as original as possible. Jack K1VT filter in front
In the OmniVI only TX rf is routed through the LPFs on the LP filter board; receive does not see the benefit of these LPFs. However BPFs on the front end board are used for both TX and RX. But in the
The interference not being present on my TS-940S and CorsairII suggests that it is being created within the OmniVI. I will check to see if the diodes are being properly switched and biased, and if ev
I made a similar mod to my 229B tuner. However, instead of using doorknob caps I replaced the originals with 6KV 470pF Y5P ceramics. These capacitors are physically larger than the originals, having
The other day I decided to check for propagation on 15M, and was surprised by how unusually quiet the band sounded; even the infamous 21.333MHz birdie was not to be heard! I then discovered that the
Ken, Do you have any tips for accessing and removing the XTAL OSC/LO Mixer board? I need to reflow solder connections associated with the 15/12M filter, or possibly replace BA482 diodes. Please see m
Author: "Dr Jack A. Mandelman" <modeler@bellsouth.net>
Date: Sun, 10 Aug 2008 00:24:16 +0000
Hi Ken, Thanks for your quick reply. The filter is shared and switched by either of the 15M or 12M enable DC voltages. The 15M and 12M switching voltages are "ORed" by diodes D33 and D34 near connect
The Omni6+ intermittent problem that I posted on Friday Aug 8 appears to be fixed. FWIW, on Monday I removed the plate on which the NB and FM boards are mounted, to access the XTL osc/L.O. board. All
When it is very warm in my shack (~85F) my Omni VI+ has the following problem on 30M only. Every 35 seconds or so the frequency would jump on the order of 10-50Hz for a fraction of a second, and then
Ken, Thanks, I found your earlier post on alignment of the LO coil and made a copy for future reference. Since my problem (so far) happens only under extraordinarily warm temperatures in the shack, I
Steve, Thank you for the info on how you accessed the LO coils. I made a copy for future reference. Since my problem occurs (so far) only when it's extraordinarily warm in the shack, I'm postponing a
Steve, One thing that may be worth trying is disconnecting the cable to connector 84 (LO osc output to PLL and control voltage feedback) and tracking the oscillator frequency vs temperature. With 84
Ron, Please check the output (scope and freq counter) from the 5.0-5.5MHz PLL. Since it's dropping out on all bands while tuning the 5.0-5.5MHz oscillator, I suspect that you are losing output from t
Dan, First off, I want to say that I am not an Omni V guru; however, although I've never owned an Omni V, may I offer a suggestion as a start to diagnosing the problem? When you remove the covers fro
I'm looking for an OmniVII with built-in tuner in pristine condition. Please email me off-list. Thanks. Jack K1VT k1vt@arrl.net _______________________________________________ TenTec mailing list Ten