[App_rpt-users] Pingponging of a simplex node

[Phil N6TCT]

Another trick I've done in the past is to glue a phototransistor to
the carrier detect LED on an HT.  You don't have to crack open the HT
and it works pretty well.  (A downside is that on some HTs the carrier
detect LED will turn on even if the correct CTCSS tone isn't present.
alas.)

Phil

On Wed, Jun 1, 2011 at 5:31 PM, Bryan D. Boyle <bdboyle at bdboyle.com> wrote:
> On 6/1/2011 8:15 PM, Jim Duuuude wrote:
>>
>> If you REALLY HAVE to use an HT, use a Motorola, HT-600 or newer.
>> They have a bridged audio out (for the speaker) coming out of the speaker/mic
>> connector/cable and it only has DC bias on it when the radio has something
>> to listen to. Therefore the presence of DC on the speaker lead can be used
>> as a COR/CTCSS indication.
>> [....]