I would note that the DR135 has now been replaced by DR135Mk3 which has some substantial changes to the modulation circuit.

But I am curious if the radio makes the noises when you transmit with no audio?

If you overdrive the URI you will get some nasty noises. One way to do this is putting the PL and voice on the same output channel. In that case the two gain controls (txtone & txvoice) must add up to something less than 1000, as noted in the knowledge base.

Regards

Ken

From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of K7ILO
Sent: Tuesday, January 01, 2013 8:04 PM
To: app_rpt-users@ohnosec.org
Subject: [App_rpt-users] Alinco DR-135

Hello all.

I know I have seen a few threads on using the DR-135 as a node radio so I decided to ask this question.

Has anyone using this radio had problems with a crackling noise or popping noise when the radio transmits?

It doesn’t matter if you are using the data port (for audio) or the mike and speaker jacks.

Its not all the time but happens more than it doesn’t.

Thanks for any input into this matter.

Harold

K7ilo