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HTX-10 freq expansion with resistor?
- Thread starter towerdog
- Start date
Moding the HTX-10 with a crystal change
Hi,
I put a htx-10 on the 11 meter band by changing the reference crystal like the mod
for the HR2600. The frequency display doesn't change but you just deduct 2 mhz.
I don't have the crystal frequency. I used my signal generator to supply the frequency
and it's been a long time since I did it. As I recall it was around 4.77 mhz.
Have fun
Monk
Hi,
I put a htx-10 on the 11 meter band by changing the reference crystal like the mod
for the HR2600. The frequency display doesn't change but you just deduct 2 mhz.
I don't have the crystal frequency. I used my signal generator to supply the frequency
and it's been a long time since I did it. As I recall it was around 4.77 mhz.
Have fun
Monk
it works just fine i have done it but u can only run it on the low side
Yes, it might be possible to change the mixer crystal in the radio to get it to go up or down.
As already said, the frequency display will not follow the new band and if you want all of 10 and the CB/freeband frequencies you would need to switch crystals in and out.
You will be limited to whatever "range" of frequencies the new crystal gives you.
There is more than one way to skin a cat so to speak, but it is not like the HR series of radios were you can cut a trace and add a jumper and get all of 26/29.999 with full frequency readout.
There were some CB radios that did not allow expansion by playing with the pins on the PLL chip, but you could still change a loop mixing crystal to get where you wanted to go.
And there are other considerations, you will have to do the crystal work properly so you do not introduce stray capacitance from wires and switching that will affect frequency stability.
I do not doubt that Monk was able to get the radio to RX/TX somewhere other than 10 meters, it is just how much work is it, and how practical is in in application.
IMHO this radio is not worth the trouble when there are so many more radios out there now that are much more easily done.
As already said, the frequency display will not follow the new band and if you want all of 10 and the CB/freeband frequencies you would need to switch crystals in and out.
You will be limited to whatever "range" of frequencies the new crystal gives you.
There is more than one way to skin a cat so to speak, but it is not like the HR series of radios were you can cut a trace and add a jumper and get all of 26/29.999 with full frequency readout.
There were some CB radios that did not allow expansion by playing with the pins on the PLL chip, but you could still change a loop mixing crystal to get where you wanted to go.
And there are other considerations, you will have to do the crystal work properly so you do not introduce stray capacitance from wires and switching that will affect frequency stability.
I do not doubt that Monk was able to get the radio to RX/TX somewhere other than 10 meters, it is just how much work is it, and how practical is in in application.
IMHO this radio is not worth the trouble when there are so many more radios out there now that are much more easily done.
No I am not thinking of the HTX-100, I had one, and I do know the difference between the two.
It is possible, If you understand how a radio works, you would know that there is almost some way to get it to work somewhere else....you may have to work like hell to get it to do it, but they are still just radios.
I have seen guys make Cb radios work on 7 MHz before, was it easy, not really, but he did it.
I Know of no mod that you just cut one trace and add a resistor to a HTX 10 that has worked to date.
The HTX-100`s only had USB and CW, you could get them on 27MHz but not worth the trouble.
However, the RX on the HTX-100 is better than any of the HR/Lincoln/2830 radios.
I have used both on 10 meters.
73
Jeff
It is possible, If you understand how a radio works, you would know that there is almost some way to get it to work somewhere else....you may have to work like hell to get it to do it, but they are still just radios.
I have seen guys make Cb radios work on 7 MHz before, was it easy, not really, but he did it.
I Know of no mod that you just cut one trace and add a resistor to a HTX 10 that has worked to date.
The HTX-100`s only had USB and CW, you could get them on 27MHz but not worth the trouble.
However, the RX on the HTX-100 is better than any of the HR/Lincoln/2830 radios.
I have used both on 10 meters.
73
Jeff
The HTX-10 would indeed operate on 11m if you changed out a crystal. The CPU was locked and would not allow operation outside the 10m band with any attempt to reprogram it however by changing the crystal that the CPU had to work with it would indeed work on 11m. It was not a great way to mod it but it would work.
The cpu is the same as the Titan ll rpsy 485. No need to change it because that chip will cover those frequencies. It’s just blocked by a diode etc on the face board somewhere, just need to find where.
If that is the case then many many very smart techs have been searching for this diode for over 20 years now.
Color me skeptical. Is the firmware inside it the same? That's what really counts. If the chips each have identical markings, that would be a good sign.
73