| Author |
Message |
    
Copperfan
| | Posted on Sunday, July 28, 2002 - 11:48 pm: | 
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what kind is that on the right side? 10 meter RS?
hows that thing do?
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bruce
| | Posted on Monday, July 29, 2002 - 7:22 am: |
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That is a titan 485 that is now my moble 10 meter ( fm ) radio.It covers 28-29.7 only but all modes and drives my homemade amp in the car. Now when the photo was taken i had just bought 7 of them i later bought 3 more for our local 10 meter group.The one in the photo was burning in for 72 hours i always do that since most failures happen within the first 24. As for mods none for transmitter it sounds great right out of the box but on recive it has had a 4 pole 10.695 filter followed by a 20 db gain preamp added by removing the stock 2 pole filter which vastly inproved the fm senitiviy ( .15 for 10 db .25 break squelch ) All are gone now except for 3 which i still have 2 are boxed up and except for the 72 hour burn in have never been out of the box. I also have a radio shack htx-10 almost the same radio slighty larger higher power and will not fit under my dash which the 485 does quite well. For the money about 100 dollars one heck of radio. |
Copperfan
| | Posted on Monday, July 29, 2002 - 9:14 pm: |
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you have more detail on the 4 pole filter and pre amp?
Would you consider setting one of the new ones up with that filter conversion and the preamp then selling it to me?  |
bruce
| | Posted on Monday, July 29, 2002 - 11:20 pm: |
|
copper fan im not in radio sales this was a project buy a group of hams but here is what we did and it will work with the 2950 too in short removed the 10.695 filter then using a small 20db gain preamp resoldered ( with small wire exstension ) the input and ground of the filter back on the board and the output of the filter to the preamp the preamp output goes to a CHANNELGUARD filter and the out put of the channelguard back into the output conection on the mother board that you lifted the stock filter from this gives you a 10.695 20 db gain if with filtering in and out.... hey deadbug but works! Now im think down the road of using MAR-6's as the amp and installing everything on the board but im diabetic and my eyesight is limited so it will be when ive got the time to set up to do it
as for the radios several sights sell them on ebay for about 100 bucks!
Bruce |
Jimbob
| | Posted on Tuesday, July 30, 2002 - 2:30 am: |
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There is a crystal filter kit ($35) for that I.F. frequency with business in Arizona. Search some sites, you will find the company! |
bruce
| | Posted on Tuesday, July 30, 2002 - 7:18 am: |
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Jimbob your right and thats the channelguard and yes it works great!Toss 2 back to back and they are VERY sharp however he did not allow for gain now you can modify one to get gain but not anything like 20 db. On FM you need lots of gain 140 db before the detector is not uncommon. On FM you WANT to overload the detector and squash out all AM.... its called LIMITING. The fm detector dosent look at size only change in frequency and how fast it is changing. Now that said i checked the radio on 28.450 and it worked grest on SSB too but you HAD to turn down the rf gain. Do you lose yes it loses dynamic range so overload could be a problem but Im moble. |
Dinker1
| | Posted on Tuesday, July 30, 2002 - 9:06 am: |
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Thge business in Arizona, I think is probably the one of Lou Franklin and has moved his buiness to California.. He has all the goodies...DEAN- |
bruce
| | Posted on Tuesday, July 30, 2002 - 6:29 pm: |
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Dinker he just moved back probley just ahead of a ex wife! HA HA HA |
