Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Last revision Both sides next revision | ||
|
563upgrade [2011/07/15 11:01] n1eu |
563upgrade [2015/11/24 12:54] n1eu |
||
|---|---|---|---|
| Line 11: | Line 11: | ||
| ***Option 2:** For $125, you can get factory installation of all the features in Option 1, plus Ten-Tec will replace all nine keypad buttons instead of applying new sticker-type legends. | ***Option 2:** For $125, you can get factory installation of all the features in Option 1, plus Ten-Tec will replace all nine keypad buttons instead of applying new sticker-type legends. | ||
| ***Option 3:** For $275, Ten-Tec will do a “complete factory upgrade” to an OMNI VI Plus. This includes everything in Option 2 plus replacement of the two circuit boards and wiring harness changes needed to add an optional filter position in the 9-MHz IF. Ten-Tec says options 2 and 3 will only be offered for a limited time. Call 800-833-7373 if you’re interested, and you’ll be put on a waiting list. You must pay shipping to Ten-Tec, but there is no charge for return shipping for customers in the continental US. | ***Option 3:** For $275, Ten-Tec will do a “complete factory upgrade” to an OMNI VI Plus. This includes everything in Option 2 plus replacement of the two circuit boards and wiring harness changes needed to add an optional filter position in the 9-MHz IF. Ten-Tec says options 2 and 3 will only be offered for a limited time. Call 800-833-7373 if you’re interested, and you’ll be put on a waiting list. You must pay shipping to Ten-Tec, but there is no charge for return shipping for customers in the continental US. | ||
| - | |||
| - | ---- | ||
| - | |||
| - | **From the Ten-Tec Reflector December 22, 2001** | ||
| - | |||
| - | There were three upgrade paths offered for the original Omni VI: | ||
| - | |||
| - | - Option 1 added the VI+ DSP and firmware, and re-assigned front panel keys were provided with stickers to indicate their new functions | ||
| - | - Option 2 was Option 1 plus new keys, rather than the stickers | ||
| - | - Option 3 was Option 2 plus the VI+'s 9 Mhz filter board that provided two narrow filter positions rather than one as in the original Omni VI. | ||
| - | |||
| - | The factory considers Option 3 to be equivalent to the Omni VI+, and it is with the exception of the front panel labeling. | ||
| - | |||
| - | I have been extremely satisfied with my Omni VI/Opt 1 that I purchased second-hand from another list member. I have filled all of the filter positions with Ten-Tec filters, and the radio performs very well for CW and PSK31. Between it and my Elecraft K2, I don't see the need for another rig and I find myself using the Omni VI most of the time. | ||
| - | |||
| - | John Clifford KD7KGX | ||
| ---- | ---- | ||
| Line 45: | Line 29: | ||
| *The later 564's have certain changes to top and bottom foil grounding on certain boards to improve 10M birdies which are a major problem with this rig. | *The later 564's have certain changes to top and bottom foil grounding on certain boards to improve 10M birdies which are a major problem with this rig. | ||
| *The BPF filter on later 564's has a broadcast band mod to improve intermod in the presence of strong local AM BCB or SW signals. Night and Day difference on my rig. | *The BPF filter on later 564's has a broadcast band mod to improve intermod in the presence of strong local AM BCB or SW signals. Night and Day difference on my rig. | ||
| - | *An aftermarket mod from INRAD is available to improve the SSB audio response involving a swap of two component values. This became a semi-approved factory mod. Stock audio is degraded by passing through the DSP chip when DSP is not engaged | + | *An aftermarket mod from INRAD is available to improve the SSB audio response involving a swap of two component values. This became a semi-approved factory mod. Stock audio is degraded by passing through the DSP chip when DSP is not engaged ///(N1EU note: "high pass filtered" is a more accurate description than "degraded" - see [[http://omni6.wikidot.com/rxaudio|Omni6 rx audio discussion]])/// |
| *Later 564's use significant amounts of SMT construction | *Later 564's use significant amounts of SMT construction | ||
| Line 65: | Line 49: | ||
| **July 2011** //(comment from N1EU)// | **July 2011** //(comment from N1EU)// | ||
| - | In light of the improvements described above by N1LQ, I spent several hours comparing a 1992 vintage Omni 6 with a 2001 vintage Omni 6+ from the very last production batch (serial number 08XXXXX1 purchased in early 2002). My conclusion was that any improvements in rx noise/birdies was subtle, if at all audible. | + | N1LQ does a great job of tracing the 564 evolution, but I'd like to offer up some comments: |
| + | |||
| + | 1. I've spent many hours of A/B comparisons of various vintages of Omni 6/6+ from 1992 to 2001. My conclusion is that any improvements in rx noise/birdies was subtle, if at all audible, and that the earliest units performed just about as well as the latest units. | ||
| + | |||
| + | 2. The Inrad mod audio improvements are slight compared to the real problem, which is the audio dsp. This is [[http://omni6.wikidot.com/rxaudio|discussed elsewhere]]. | ||
| + | |||
| + | 3. In terms of the use of SMT in later units, the logic board, PBT board, Control board and IF/AF board all became SMT. The 9Mhz Xtal Filter board was SMT from the start of production. | ||
| + | |||
| + | 4. Changes were made in components in the product detector circuit on the IF/AF board of the Omni 6+ to improve intermod distortion over the Omni 6. | ||
