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Message |
    
Oldpirate
Junior Member
Username: Oldpirate
Post Number: 40
Registered: 11-2003
| | Posted on Saturday, October 16, 2004 - 10:07 pm: | 
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Hi Guys, I have a friend who has a Realistic HTX 100 it has 11 meters added but the received audio is very low even compared to normal cb sets, anyone else encountered this problem or know what the cause is |
Bruce
Senior Member
Username: Bruce
Post Number: 1687
Registered: 9-2003
| | Posted on Sunday, October 17, 2004 - 2:00 am: |
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check the speaker first then you might have to trace the audio The HTX-100 is a very nice radio i had one back in the 90's its a fine stable SSB set ONLY drawback is NO AM, NO FM the HTX-10 does have them but not near as nice on SSB. You can get the book on that radio on the internet. |
Oldpirate
Junior Member
Username: Oldpirate
Post Number: 41
Registered: 11-2003
| | Posted on Sunday, October 17, 2004 - 2:37 pm: |
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Thanks Bruce will try an external speaker first to see if that makes any difference then try and trace it from there. Guess the worst ae scenario is that the rig may need a service or realignment so thats no big deal. i know a tech that will be able to sort it out.
Thanks
Murray |
Jon666
Intermediate Member
Username: Jon666
Post Number: 281
Registered: 11-2003
| | Posted on Monday, October 18, 2004 - 7:50 pm: |
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is the htx 10 modifyable?
jon |
Bruce
Senior Member
Username: Bruce
Post Number: 1695
Registered: 9-2003
| | Posted on Monday, October 18, 2004 - 9:09 pm: |
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NO IT IS NOT
I still have 3 of them and there great radios 99% the same as a Magumn 257 but diffrent CPU. |
Kilowatt
Member
Username: Kilowatt
Post Number: 63
Registered: 2-2004
| | Posted on Tuesday, October 19, 2004 - 12:45 am: |
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Definitely NOT modifiable.... #$#@$%^!
;-( |
Jon666
Intermediate Member
Username: Jon666
Post Number: 282
Registered: 11-2003
| | Posted on Wednesday, October 20, 2004 - 6:41 pm: |
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ok thanks
i wont bother to buy it
thanks
jon |
Bruce
Senior Member
Username: Bruce
Post Number: 1698
Registered: 9-2003
| | Posted on Wednesday, October 20, 2004 - 7:25 pm: |
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Very nice radios but HAM only! |
Kilowatt
Member
Username: Kilowatt
Post Number: 66
Registered: 2-2004
| | Posted on Wednesday, October 20, 2004 - 11:01 pm: |
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Nice power supply/radio set-up, Bruce! I've never seen an Icom power supply quite like that one. How many amps is it rated for? |
Hyperno_1979
Intermediate Member
Username: Hyperno_1979
Post Number: 412
Registered: 12-2005
| | Posted on Friday, August 31, 2007 - 9:29 am: |
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This is an old thread and i'm no radio genius.....but to me that dear Bruce is an HTX 10.......the HTX 100 was a totally different kettle of fish. More along the lines of the President Licoln. Totally modifiable...at least the ones we got over here.
CEFFFCEF
Bob
CEF703/CVC26
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Bruce
Senior Member
Username: Bruce
Post Number: 4498
Registered: 9-2003
| | Posted on Friday, August 31, 2007 - 10:33 am: |
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CORRECT the HTX-10 and the HTX-100 are not the same but are widely confused here and this is why so many HTX-10 are distroyed but butchers who have tried to mod them.... THINKING they are the same as a 100 or the HTX-10 is the same as a MAG-257 IT IS NOT !!!!!
The power supply went with my ICOM IC-230 I bought in 1976 I still have that 230 works fine but has no tone so i run the htx-10 on the 3 amp ( 5 peak )supply works fine .....
On 6 since 66
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Aztrooper
New member
Username: Aztrooper
Post Number: 1
Registered: 11-2007
| | Posted on Sunday, November 04, 2007 - 4:24 pm: |
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I'm new to the forum and new to Ham. Just picked up a HTX-100 like new at an estate sale. Is it modifiable to go to 11 meter also? If so, how? Bob |
Hotwire
Senior Member
Username: Hotwire
Post Number: 2429
Registered: 1-2005
| | Posted on Monday, November 05, 2007 - 1:34 pm: |
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Aztrooper, Well I must correct my last statement. I stumbled upon an 11 meter freq mod for the HTX-100 and a LSB mod as well! May give it a try on one of mine. Will post the results.
KEEP IT REAL!
Kenny
cef491(27.115lsb)
2sf491(27.555usb)
Indiana
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Hotwire
Senior Member
Username: Hotwire
Post Number: 2430
Registered: 1-2005
| | Posted on Monday, November 05, 2007 - 12:25 pm: |
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Aztrooper, NO,The HTX-100 is not 11 meter modifiable . Even if it was it would be pretty much useless because all they have is USB for voice and CW. Too bad because I have 2 of them myself.
KEEP IT REAL!
Kenny
cef491(27.115lsb)
2sf491(27.555usb)
Indiana
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Bruce
Senior Member
Username: Bruce
Post Number: 4522
Registered: 9-2003
| | Posted on Monday, November 05, 2007 - 10:35 pm: |
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The HTX-100 IS MODIFIABLE the HTX-10 is NOT ....
The HTX-100 is CW/SSB only the HTX-10 is AM/FM/SSB
On 6 since 66
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Hyperno_1979
Intermediate Member
Username: Hyperno_1979
Post Number: 477
Registered: 12-2005
| | Posted on Wednesday, November 07, 2007 - 3:30 pm: |
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I came across this which may also be helpful.
Conversion of the HTX-100 to USB/LSB.
Here is a cheap and easy conversion to selectable sideband operation. With this mod, the CW function is lost, but with a few more parts (1coil can approx 10 mh, 1 22pf cap, 1 470 mh choke) on a small board it could easily be restored if it is wanted. The basic theory of this modification is that the CW portion of the carrier oscillator tuning circuit is padded and rerouted into the USB circuit via a small switch, to provide LSB.
Solder a 27 to 35 pf ceramic capacitor across the pins of C120, the tiny 22 pf ceramic that is next to the cw coil can L13(do this from the bottom of the board) Now lift the switch side ends of r81 and r115, and connect them with some fine wire them to a spdt switch.(I use the rx/tx switch, after jumpering it to the rx position and cutting the traces.), You want the ends of the resistors that connect to the transistors Q14 and Q19, not the ends that connect to the chokes L11 and L9.
Take the center lead from the switch back to the point on the board where the USB resistor R81 was lifted from.
So the rx/tx switch is now your sideband select switch. You must manually offset the reference oscillator (VFO) by the if filter bandwidth (-2.5 khz), so if you want to be on cb channel 38 lsb, then you tune to 27.3825. Tune in a known good signal on the lower sideband, (xx.xx25 not xx.xx50!) and align the rig's LSB carrier oscillator circuit by adjusting L13. Gently! The core is fragile. If you crack it you can save it by removing the can from the board and unscrewing the core from the bottom. Invert and reinstall core, reinstall can. (Try to avoid this)
Revision B: replace L13 with a 10 mh fixed inductor, and C120 with a 35 p or 50 pf variable. Tune using the variable capacitor. This method is better for those of us who crack inductor cores.
Lastly, if operation below 27.5 MHz is desired, some further adjustment is in order, as this rig's power output falls off rapidly below that point. The broadbanding adjustment commonly used on the HR2510 will not work on this radio, but this does. With top cover off, observe the two filters marked DO NOT ADJ. The right hand one controls the input to the final amplifier. Remove the sticker, and adjust the rearmost screw anticlockwise about 1 turn.
Check power output at 26.0 MHz before and after. You will see the power output go up from about 5 watts to 25 or 35 quite quickly. Note that now the rig will now have poor power from 29.00 MHz and up.
Note that this filter adjustment may increase harmonic or out of band emissions; I have not checked this, but have not experienced any TVI or performance problems with the rigs I have converted to date.
In the event of an alignment problem, have it tuned up as if it were an SSB only Uniden HR2510, which is what it basically is. Enjoy, use at own risk.
So there you go guys.
CEFFFCEF
Bob
CEF703/CVC26
269 Hunter Valley
NOT allowed to hold a passport....
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Hyperno_1979
Intermediate Member
Username: Hyperno_1979
Post Number: 478
Registered: 12-2005
| | Posted on Wednesday, November 07, 2007 - 3:16 pm: |
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Frequency expansion For HTX-100.
Use at your own risk!
Remove bottom and top covers.
Remove the PLL board and tray that is held in by 2 screws on each side of the radio.
After you remove the board you will see a 4 sided surface mount chip IC 1208 that has 64 pins.
Look to the right of the chip and locate the 4th and 5th pins from the top right of the chip, pins 28 and 29.
Notice they are soldered together and run to a trace to a surface mount resistor.
Carefully cut the trace next to the 2 pins. Now locate 2 rows of pins to the top of the chip.
The bottom row last pin on the right has 5 volts DC on it.
Solder a 10K resistor to that pin and to the pins 28 and 29.
Now reassemble the radio and your done.
The radio will now tune 26 MHZ thru 30 MHZ.
This is all i have at the moment, i hope this helps.
CEFFFCEF
Bob
CEF703/CVC26
269 Hunter Valley
NOT allowed to hold a passport....
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