[ARC5] Re: Modulators

[k0ng at inebraska.com]

Bill: I built and used the "Frank Jones Golden Gate Modulator" for years.
It was simple, cheap and worked well. Efficiency was not the best because
this was a screen modulator. Power supplies did not have to be so hefty.
(100 mA dynamotors were easier to find). Dont let anyone tell you that
you are nobody if you dont plate modulate !! Bah Humbug.

73 DE Charlie, K0NG  .. 


Quoting zeno <zeno at sonic.net>:

> I remember one reason hams in the 50s used the ARC 5 type 
> transmitters which they could pick up for $10 at the local ham 
> surplus shack on Beverly Blvd. (man what a place that was!!!!), they 
> could build a simple modulator and be on AM, very economically. What 
> was that modulator circuit? Must have been in the old handbooks. 
> Anyone here built a good home-brew modulator for an "ARC-5" xmtr? 
> Guess I will see these things when I get some of the old books and 
> manuals I have been trying to track down. I am getting ahead of 
> myself since I do not even have one of these units up and running 
> even on CW, but I was curious about this.
> Anyone having fun building a modulator from scratch? What approach 
> would one use these days? Recycling old tube gear and parts from the 
> junkbox? Or is there something else. How common are the original 
> military modulators for these?
> 
> Bill / K6TAJ
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