[ARC5] Volume control - ARA receiver

[J Mcvey]

You need to be able to adjust the RF gain because those sets tend to overload easily. There are situations with strong ssb signals where you have to reduce the sensitivity or you wont be able to clarify the audio. Other times , you just dont need all that gain, so turning it down reduces the noise.

You can easily fit a 50K mini pot and and a dpdt  on-off-on toggle ( for cw-off-voice)  in an already hacked box. BTW, if the switch is flipped quickly through off , the dyno hardly ships a beat when changing modes. That's the way the original circuit was too.
 

    On Monday, July 11, 2016 9:33 PM, AKLDGUY . <neilb0627 at gmail.com> wrote:
 

 The ARA receiver (mine is the 3-6 Mc/s model) has no audio gain
control, with the level of audio being set to the pilot's preference
by the RF gain control.

I'm building an LM-380 audio board with a 600 ohm pot to terminate the
600 ohm output from the set and adjust the level into the LM-380.

My question is, should this pot be mounted somewhere accessible so I
can adjust the audio level, or should it be non-accessible and the
level set by varying the RF gain control alone? The set has the usual
ham mod with headphone jack, RF gain, and BFO on/off switch mounted in
the space that was occupied by the little pullout box.

73 de Neil ZL1ANM
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