Analogue S-meter using a VU meter and driver module

Jean-Luc F6HOY added an analog s meter to his first BITx40 with a simple circuit on an audio line and a 500 microA vu-meter.  All was fine except that without any AGC it only provided an indication of the signal level.

Jean-Luc added a Chinese Audio Vu-meter that is much better on his µBITx.
For around 15€ he received a circuit module and 2 vu-meters.   Only one vu-meter is used of course.   The circuit board functions as an AGC, and for an extra bit of fun he has a nice warm light in the shack from the yellow light of the VU meter.

You can get this kit from several shops in China (one such  example).

Reference

Leave a Reply

Your email address will not be published. Required fields are marked *