[ARC5] T-19 first run issues.

[Mark K3MSB]

Ground all your "boxes" together directly;  don't rely on the connectors.

Mark K3MSB

On Sun, Apr 19, 2020 at 1:26 PM J Mcvey via ARC5 <arc5 at mailman.qth.net>
wrote:

> Just got this ARC-5 system wired up and going. Even the rack had
> hacked/dry wires that needed rewiring.
> The T-19 was recapped, cleaned, etc.
>
> I have this strange problem with a hum in the carrier.  It sounds like a
> rig with a bad filter cap. I rechecked my wiring, etc, but everything is OK.
> The only other "symptom" is low output, about 2  Amps in CW mode . ( It's
> not the meter because I use the the same one with the SCR274 which will go
> 3+ amps). I'm using an A-27 dummy load
>
> I'm thinking that it may be an alignment issue where the finals are
> off-resonance and drawing too much current compared to the carrier
> amplitude and inducing a ripple modulation?
> It's real subtle when looking at it on a scope, but obvious on a radio.
> The Dynamotor is almost ripple free , putting out around 590V under load.
>
> Any thoughts?
>
>
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