[ARC5] Volume control - ARA receiver

[AKLDGUY .]

I understand that I need to be able to adjust the RF level, but that
wasn't my question. My question was, do I need a true volume control,
or can I adjust the audio from zero to max with the RF/IF gain control
alone?

73 de Neil ZL1ANM

On 7/12/16, J Mcvey <ac2eu at yahoo.com> wrote:
> 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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