The HTX-10 is not a CB radio!
 

 

HTX 10 MOD 25.150-29699mhz

HTX 10 MOD 25.150-29699mhz 1.open radio look up on front face board if you look very carefully you will see 2 solder pads where there could of been 2 pins for a jumper plug (like the 2950's)you will see one side goes to a smd. and the other goes to a ground island solder a resistor 10 ohms across pads (the resistor is brown black black gold 1/4 watt) Now put the radio back together and hold fun' and button 2 in while turning on .the radio will have a 40 channel display on right of freq display 1-40 press 2 to change bands along w/ lower left button' THERE is NO fine mod for radio due to missing components. and you know how to turn up amc and alc in the rear. 88's

CW "MOD"...
Jim, N5IB came up with a CW adapter for the Radio Shack HTX-10 10 meter SSB Transceiver. The unit was featured in the April 2000 QQ.

Well, a vision-impaired ham wanted one of these, and when Jim asked if someone else could build one (Jim was in "non-building mode due to school" at the time), well, I was getting the urge to melt some solder, and this seemed like the right sized project. Here's a link to Jim's web article (not the QQ article).

Construction

  1. The unit is built Manhattan style in the QRP-standard Altoids tin format. Of course, being anxious to melt solder, I didn't lay it out ahead of time but just went to building. As a result, things got a bit tight in spots.

 

 

 

 

 

 

 

But, all the parts made it in the box, and all in all, it doesn't look all that bad
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Frequency Shift

1. Press the fine tune knob for "func" and then the shift button until shift+ or shift- are selected, as desired
2. Press "func" again and HOLD DOWN the shift button, a three digit number representing the shift will appear
3. Change the shift with the tuning knob
4. Key the mic to go back to normal mode

 

Transmit "shift"...

The radio has a transmit offset (they call it shift) for repeater operation and it can also be used to work split frequency. The amount of offset can be changed but what they don't tell you is the offset can only be changed in 10 KHz steps. So what do you do if you are trying to work a station and they are listening 5 KHz up or down (or some other odd split)? Save the receive freq in one memory and the transmit freq in another memory and switch between the two. It takes two hands, one to operate the microphone and one to press the memory buttons. Yeah it's crude but it works. If somebody knows a way to change the offset in something other than 10 KHz steps let me know and I'll put it up here.

Fine tuning control...

 

The Fine Tune control on the front panel not only changes the receive freq but also changes the transmit freq accordingly... a nice feature.
FM receive audio quality (the lack of)...

 

There is a cure for the poor receive audio quality when using the FM mode. It seems that the radio was not tuned properly at the factory and requires a slight adjustment. While receiving an FM signal adjust T3 for the best audio. A quarter turn should be about enough. Use the proper alignment tool and not a screwdriver or you may crack the slug! If you feel unsure about doing this then find someone to help you. Opening up your radio and making adjustments will probably void your warranty. The photos below show the location of T3. Adjust T3 only, nothing else! It's not going to sound as good as a $300 2 meter rig but it is an improvement.

 

 

 

 

The bottom cover has been removed and the front panel is to the left in each photo.
You do this adjustment at your own risk, if you break something I am not responsible, sorry!

 

 

ATTENTION
The KB2LJJ takes no responsibility for any damage during the modification or for any wrong information made on this modification.