Re: Struggling with tuning clicks and birdie sounds
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Hi all,
Before, I have the same problem with other transceivers, with various DDS, and with LED/OLED displays. The tuning clicks, are the software problem, connected to refreshing frequency for display, reading frequency for the rotary encoder and other refreshing frequencies in arduino code (update frequency to Si570/Si5351/AD9851 ...). To resolve this problem need to optimize code, and implement some wait()/delay() functions.
(many features - many clicks ..., simple code - no clicks). The QRP transceiver is just QRP transceiver - not need to make coffee , and read news papper ... Good idea is to use separate power source (2 or 3 pcs LM7812 / 7805 / 7806 for DDS, receiver and other ...
(Birdie sounds are harmonics problem with DDS, and it is not resolving problem. Transceivers also have birdies in other frequencies, but Your band plan includes only one/two of them.)
73!
On Thursday, June 8, 2017 12:42 AM, Dr Fred Hambrecht <AAR4MI@...> wrote:
I have braided both the tuning and volume control wires with good results,
plus it looks better.
v/r
Fred W4JLE
-----Original Message-----
Sent: Wednesday, June 7, 2017 07:39
Subject: Re: [BITX20] Struggling with tuning clicks and birdie sounds
It seems there is a huge variability between various BITX40 radios, and
there are various points where improvements may help.
In my particular case, I achieved the greatest tuning click reduction just
by using shielded wires to and from the volume potentiometer.
73 Allard PE1NWL
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