[ARC5] " ARC-5 " Transmitter Antenna Matching.

[Marty Reynolds]

> (per request)
>
> On Loading an Antenna:
>
> The SCR-274N and AN/ARC-5 radios were not designed
> to load a 50 ohm antenna. They were intended for
> antennas of about 5-12 ohms. In order to load
> a 50-ohmer you'll need to do one of two things:
>

Stinson's method is part-complete and unsupported with an explanation

Your problem is to adapt the thing to run into something beside
a short random wire that looks like low-R and big Xc

Scroll the loading coil back to left to discard the Xc compensation (with Xl)

Then connect a broadcast (370pf) variable in series w. 50 ohm resistive
load and spring-terminal on front.  This'll be adjustable Xc to tune out
Xl of swinging link in ARC-5 tank coil. Same boolah-boolah for a T19 or a
T-22.

Connect "command set" to dummy load & muck with broadcast variable
& link adjustment 'til you get, say, 40W into dummy load when 600V
on 1625 plates.

Don't screw tith the Un-Un hooey since it doesen't address the reactance
questions at all.  The Un-Un procedure is as effective as putting
a fotograph of a parakeet in with the 1626

  Marty