[ARC5] A Couple of Tips ARC R-19 receiver

[AKLDGUY .]

On Wednesday, April 4, 2018, David Stinson <arc5 at ix.netcom.com> wrote:

> This is a photo of the R-11 .....



> When you get the receiver running, you'll think
> the audio stage isn't working, as the noise output
> will be low.  It is working; it's just ingeniously
> engineered to minimize headphone "fatigue" before
> AM Squelch was common.  With a properly-matched
> speaker, strong signals, like those a pilot would
> expect when talking to the Tower and local
> traffic, will be much louder than the background
> noise- easy speaker level.  Weak signals will be
> correspondingly less loud.
> ...

73 Dave S.


I recently got my ARC-5 (ARA CBY-46105) receiver going. I was amazed at how
the band noise came up when a carrier came on. It's so much like a squelch
that I can only assume it's designed like that. The set has plenty of
sensitivity, but the quietness when no carrier is present is not like how I
remember from decades ago. Can anyone explain this? Anyone experiencing the
same?

The receiver has only the usual BFO switch, RF/IF gain pot, and headphone
jack in the front panel, and 12V heater rewire. Using the orig audio output
transformer, terminated in 560 ohm and feeding a high impedance amplified
speaker from an old computer.

Neil ZL1ANM
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