Is there a PL mod to Radio Shack HTX-10

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Is there a PL mod to Radio Shack HTX-10

Postby WB2HTO » Thu Sep 03, 2009 7:39 pm

I have a Radio Shack HTX-10 and it has one built-in PL of 88.5 Hz, and I want to change it to 100Hz. Does anyone know how to do this mod, or if there is a CTCSS outboard solution for the HTX-10?

Thanks

David
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Re: Is there a PL mod to Radio Shack HTX-10

Postby WN4AMO » Fri Sep 04, 2009 10:18 pm

The good news is yes there is. I use a HTX-10 to monitor my 10 meter repeater. I wired in a Communication Specialist TE-32 and that way I was able to access all of the 10 meter repeaters when the band opens. It is in an external box and you can quickly change tones (TX) only. I picked up the 12 vdc from the Radio Shack to power the tone box. Was fairly simple to install, downloaded the manual from the internet to pickup access points. As I recall, all I had to do was solder the leads from the tone box to the mic solder points. Hope this helps Paul WN4AMO
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Re: Is there a PL mod to Radio Shack HTX-10

Postby WB2HTO » Tue Sep 08, 2009 11:29 am

Thank you Paul that looks like a good outboard solution. I am still hoping someone has poked around the HTX-10 and knows where and how to adjust the on-board, existing PL circuit to another frequency.
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Re: Is there a PL mod to Radio Shack HTX-10

Postby wj5o » Mon Sep 14, 2009 4:19 pm

I have the information about adding a Com-Spec CTCSS unit to the HTX-10 rig....... PDF about 125 KB easy attached to an Email.
Seems the 88.5 tone is "locked in" and can not be altered...only turned on and off.
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Re: Is there a PL mod to Radio Shack HTX-10

Postby WB2HTO » Mon Sep 14, 2009 11:25 pm

Thank you for the PDF, Bill. After I got Paul's suggestion about the CTCSS box I had the same thought - use the power from the rig and connect the tone encoder inside. I really appreciate the solution you present. Thing is I have yet to hear any activity on any 10 repeater FM output frequency and I can't key up the 29.620 Boston machine (on 29.520) to see if it's even active. Ditto for 680 which is also listed, or 640.

I was hoping all along that the frequency synthesizer for the tone generator was like a 555 timer - we just needed to change a cap & resister. No such luck, I guess, but I'm gonna keep exploring. This is a great backup solution, though, thanks again.

David


wj5o wrote:I have the information about adding a Com-Spec CTCSS unit to the HTX-10 rig....... PDF about 125 KB easy attached to an Email.
Seems the 88.5 tone is "locked in" and can not be altered...only turned on and off.
wj5o@amsat.org
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