[ARC5] Powering an ARC-5 Receiver After Long Storage

[AKLDGUY .]

> In the past, I've powered radios in stages:
>
> First, applying filament only for several hours.
>
> Second, applying B+ only, in slow steps of about 20 V up to rated B+.
>
> Third, applkying both Fil and B+ and checking operation.
>
> In the second stage, there is no current through the tubes. Does anyone
> have the nominal B+ current for the radios in the B+ ONLY states? This is
> basically a bypass cap leakage test.

With only B+ applied, the two 7K divider resistors for the screen grids are
the only load, aren't they?

So the drain = 250/14K = about 18mA.

73 de Neil ZL1ANM


On Wed, May 21, 2014 at 1:37 PM, J. Forster <jfor at quikus.com> wrote:

> I have a couple of ARC-5 receivers that have been in storage for unknown
> years.
>
> In the past, I've powered radios in stages:
>
> First, applying filament only for several hours.
>
> Second, applying B+ only, in slow steps of about 20 V up to rated B+.
>
> Third, applkying both Fil and B+ and checking operation.
>
> In the second stage, there is no current through the tubes. Does anyone
> have the nominal B+ current for the radios in the B+ ONLY states? This is
> basically a bypass cap leakage test.
>
> Thanks,
>
> -John
>
> ====================
>
>
>
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