Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous 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 63: Line 47:
  
 ---- ----
-**July 2011**+**July 2011** ​//(comment from N1EU)// 
 + 
 +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.
  
-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. 

QR Code
QR Code 563upgrade (generated for current page)