[ARC5] Power supply for chirp-free op. ?

[Unserviceable but Repairable]

Yo Doug

Gyro Gearloose wrote:

>...blah...This is to create a series resonant circuit with the roll-a-ductor
>....

This doean't check out

Doug you need a series capacitor OK, prolly 150pf on 40.  It's to
tune out the link's inductive reactance

The roller inductor has to be twisted back to the left side, i.e.
zero inductance.  Read out of circuit

In gi service, the antenna began at the output lug and, since it's fuselage-
perpendicular component was real short, it looked capacitive & hence the
needed series inductance - like the whip base-loads in HF mobile

Any old way, put a 50 ohm dummy between that 150 pf variable & ground
& twist the variable & the '459 link control 'til you get power
you & the p-s allow

1946-9 handbooks all contained the method & basis since so many link-
coupled OT & surplus tx-s began running w. coax.

Apparrently not covered in Ken Burns' latest though

   Marty

 PS There's whopping 22V across that dummy R @ 50w.  Perhaps scary
    to OSHA & Gyro

PPS: that little relay wasn't meant for keying, rather B+ "bus select"
     so only that TX was getting the juice.  Same went for the "rocker
     arm" antenna relay - antenna "bus select"

     B+ was relay-keyed back in BC-456/MD7 modurator.

     Just hook rig back up & see how she sounds... mebbbe letting
     1626 run continuously & keying the 1625 cathodes

     Let the flames begin