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Message |
    
Ca346
Advanced Member
Username: Ca346
Post Number: 960
Registered: 8-2003
| | Posted on Tuesday, August 17, 2004 - 4:00 pm: | 
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I have been thinking about adding a filter to the SSB side of my radio. I have two choices: 2.8KHz or 1.9KHz. Which one would be better? |
Bruce
Senior Member
Username: Bruce
Post Number: 1479
Registered: 9-2003
| | Posted on Tuesday, August 17, 2004 - 6:58 pm: |
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WOW good question !
My gut feeling is the 1.9 works best for rejection but the 2.8 would SOUND better Try using a audio filter first and if it is too narrow go with the 2.8. |
Ca346
Advanced Member
Username: Ca346
Post Number: 961
Registered: 8-2003
| | Posted on Tuesday, August 17, 2004 - 7:30 pm: |
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I forgot to mention that there is a price difference between the two filters. The 1.9KHz filter goes for about $90 and the 2.8KHz filter goes for about $110. You think they charge more for the more popular filter? |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 257
Registered: 6-2004
| | Posted on Tuesday, August 17, 2004 - 8:49 pm: |
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1.9 KHz is mighty tight. Folks who use them are more concerned with contesting than chatting. I'd suggest you find someone who uses one to see what it sounds like before buying one.
The 2.8KHz is pretty much standard and will give you much increased performance over using the 6KHz AM filter - if that's what it is on a 706. I'd try that one first and then if it's not tight enough you can probably sell it on an auction site for nearly what you paid for it. It's going to be easier to sell a 2.8KHz used than a 1.9KHz.
I'm wondering where you're getting figures of $110 and $90? I did a quick check and found prices of $85 for the 2.8KHz and $75 for the 1.9KHz. And that was from a retailer not known for good prices, it just happened to be the first retail site that came up when I Googled "icom 706 filters." |
Ca346
Advanced Member
Username: Ca346
Post Number: 962
Registered: 8-2003
| | Posted on Tuesday, August 17, 2004 - 9:54 pm: |
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Thanks HollowPoint. I didn't go to the Internet. I went to a catalog I had. popular Ham store in Vegas.
When I jump, I guess it'll be the 2.8KHz wherever the cheapest is... |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 258
Registered: 6-2004
| | Posted on Tuesday, August 17, 2004 - 10:46 pm: |
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Cool deal. Let us know how you like it when you get it.
How do you like the 706 MKIIG? They've been around a while and I hear nothing but good things about them as a mobile. I understand the menu system is a bit cumbersome when using the rig as a base so it's not a contest rig, but otherwise it works pretty well. I don't have a rig that does HF-UHF and the 706 is what I was considering buying as I could use it mobile and as a base. |
Bruce
Senior Member
Username: Bruce
Post Number: 1481
Registered: 9-2003
| | Posted on Wednesday, August 18, 2004 - 8:58 am: |
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346
Try a audio filter first i find they do help pull out stations and reduse noise i have the radioshack DSP one it works well. |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 262
Registered: 6-2004
| | Posted on Wednesday, August 18, 2004 - 12:57 pm: |
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I use a R/S DSP unit too. I mostly use it just for an audio amp with an 8" dual voice coil woofer, but the DSP and bandwidth adjustments do help when there is noise to deal with. It's not the best DSP unit, but it beats nothing at all and it gets rid of heterodynes. Gotta love that for $20 on closeout! |
Bruce
Senior Member
Username: Bruce
Post Number: 1484
Registered: 9-2003
| | Posted on Wednesday, August 18, 2004 - 1:26 pm: |
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DANG ....... Hollow $20 too bad you didn't buy a few extras for BOTH OF US! |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 263
Registered: 6-2004
| | Posted on Wednesday, August 18, 2004 - 1:47 pm: |
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LOL - I thought the same myself. It was one of the last ones in my area, and by the time I used it and decided I liked it they were all gone. I'm glad I got the one I did. I see them on the net from time to time at reasonable prices. |
Ca346
Advanced Member
Username: Ca346
Post Number: 963
Registered: 8-2003
| | Posted on Wednesday, August 18, 2004 - 1:52 pm: |
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My 706MKIIG already has DSP and ANF built in. It is a great radio, but better for a home station than mobile I think. The menu as you say is alot of hands on button pushing and it would be pretty dangerous to try and change bands, etc, while driving. On the other hand, the removable remote face plate is a great feature. I bought the radio new thinking I would upgrade my ticket and have a radio that does it it all. I also like the larger frequency display plate. Another feature is all of the buttons are backlit for my evening pleasure. My wife says I must like all those lights in the dark! She's right.  |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 264
Registered: 6-2004
| | Posted on Wednesday, August 18, 2004 - 2:22 pm: |
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Cool. I would guess you can change the audio bandwidth to something like 1.9 KHz on the radio then. Try it out and see how it sounds. Then try the 2.8KHz bandwidth. IF filters are a bit different in actual performance, but it'll give you a general idea. The main advantage of the IF filter is adjacent channel rejection. The close signals won't even get into the audio chain with it, so you'll have to do less than the DSP. |
