[Milsurplus] LV on ARC RX

[boeing377 at gmail.com]

Add R 392 to that 28VDC B+ list. I found better performance with higher
plate voltage but not enough to justify any permanent mods.

ARN 6 was so much easier to install than SCR 269
or ARN 7 which both required 400 cycle 110 VAC.  ARN 6 needed high
frequency AC for the
selsyns  but it used a 28 VDC vibrator to accomplish this.

Mark
AF6IM


On Sun, Sep 7, 2025 at 2:09 PM Charlie L. <mjcal79 at gmail.com> wrote:

> I have run every ARC 5 receiver I have on only 28VDC B+.  Have to use a
> set of headphones, but with a clean DC supply, feeding 28 to both filament
> and normal dynamotor B+ pin, they work fine.  The ARN6 RDF uses all common
> tubes and runs only 28 on the plates.  I have never analized the ARC 5 on
> 28V B+, checking sensitivity and selectivity, but just for normal
> comparisons, seemingly  very little difference except for audio power out..
>
> Charlie W4MEC in NC
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