[ARC5] "ARC-5" Transmitter Power Distribution

[Mike Everette]

Dave,

One thing missing from your power distribution diagram is the "varistor" across the modulation transformer secondary.  I've always assumed that one of its purposes was probably to minimize inductive kick from the transformer, generated when the radio was keyed on CW.  There is no provision in the original circuit for bypassing the transformer secondary in CW mode.

Is there something in the way of modern components which can be used to perform the same function?

73

Mike
W4DSE


--- On Sat, 11/17/12, David Stinson <arc5 at ix.netcom.com> wrote:

> From: David Stinson <arc5 at ix.netcom.com>
> Subject: [ARC5] "ARC-5" Transmitter Power Distribution
> To: "ARC-5 List" <arc5 at mailman.qth.net>
> Date: Saturday, November 17, 2012, 6:24 PM
> Someone asked, so....
> 
> How A.R.C. distributed voltage to the Command Set
> transmitters
> using the modulator.  It works well.
> You might want to key another way, 
> or add more bypasses.  Some might want to regulate the
> OSC. voltage, although I've never found it necessary in 
> a properly-refurbed transmitter.
> 
> http://home.netcom.com/~arc5/ARC5/ARC5PWR.jpg
> 
> 73 DE Dave AB5S
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