[R-390] Beaten Horse Graveyard (Goldberg replacement for 3TF7)

[Les Locklear]

Are you taking orders now? How much is shipping? Warranty? We have 
questions, do you have answers?

Les Locklear

My wife has a slight impediment in her speech. Every now and then she stops 
to breathe.

- Jimmy Durante

----- Original Message ----- 
From: "Tom Norris" <r390a at bellsouth.net>
To: <r-390 at mailman.qth.net>
Sent: Thursday, January 05, 2006 1:35 PM
Subject: Re: [R-390] Beaten Horse Graveyard (Goldberg replacement for 3TF7)


> Seriously, that would be a very good regulator box.  Those sort of  things 
> are less noisy than the constant HUMM of a Sola transformer.
>
> Not so seriously, that sort of regulator was what my smart remark was 
> based on. I sampled the current in the PTO-BFP fil circuit so as to  drive 
> such a regulator to keep the PTO-BFO filament current value at  300 ma.
>
> Then there's the mechanical Rube Goldberg sort of  thing, where a  light 
> bulb is used, which changes the resistance of a photocell,  which changes 
> the speed of a motor, which runs a fan, which pushes a  sailboat across a 
> tub of water, (the sailboat is attached to the near- side with a 
> coil-spring), the sailboat has a string which is  connected to a chute 
> which regulates the amount of gerbil chow that  feeds a team of gerbils 
> that are on a gerbil wheel.  [this is where  I've gotten stumped] The 
> gerbil wheel is connected to a small dc  generator.  When the ballast 
> current is low, the light bulb is dim,  the fan turns more slowly, the 
> boat is pulled back by its spring.  When it's pulled back, it operates a 
> mechinism that shifts the gerbil  chow chute out of the way and replaces 
> it with a mixture of gerbil- chow and laxative.  Underneath the gerbil 
> wheel is a "gerbil potty"  and as it fills up, it controls a polarity 
> reversal switch and  changes the output of the DC generator to the 
> opposite polarity.    The plus/minus output of this is used similar to the 
> simple  comparator used in my first example. (or since the gerbils are 
> making  motion, the haywire thing might be able to directly control a 
> phase- shift circuit of some sort)
>
> I suppose if I drew the Rube Goldberg Apparatus it would be easier to 
> modify.  I just came up with it ten minutes ago too, it would have  taken 
> longer than that to draw.
>
> Mad Tom
>
>
> On Jan 5, 2006, at 8:52 AM, Roy Morgan wrote:
>>
>>
>> Tom,
>>
>> I have one of those. It weighs about 90 pounds.
>>
>> It's a General Radio 1592  voltage regulator (servo-driven variac)
>>
>> Good for about 60 amps line current when set for the lower range of 
>> compensation(+/- 10 volts, I think.)
>>
>> I'm going to mount it LOW down in some rack and leave it there.  It'll 
>> run the whole shack and test bench.
>>
>> Roy
>>
>> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
>
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