[ARC5] T-19 first run issues.

[Michael Hanz]

Amen.  It's one of the reasons I use aluminum liberally for the support 
racks in my rig.  Reproduce the environment that they had in the 
aircraft, and you'll head off a lot of strange problems you sometimes 
get with grounding/bonding/shielding inadequacies.

https://aafradio.org/flightdeck/layout.htm has some construction 
thoughts on the bottom half of the page.

- Mike  KC4TOS

On 4/20/2020 12:22 PM, Mark K3MSB wrote:
> 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 
> <mailto: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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