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Author Topic: Vibroplex: Weights and Speed  (Read 33084 times)
K6DZ
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Posts: 16




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« Reply #15 on: November 02, 2013, 08:05:10 PM »

I would like to add that other brands of bugs have other speed ranges. For instance the modern ViZ Key bugs slowest speed is less than on a Vibroplex. This also true of a Hi-Mound 100. I have an Lafayette (rebranded Hi-mound) which can be slowed to 16 or so with the stock weight. Substituting a square Vibroplex weight onto the arm (if possible, I don't know) it would most likely run even slower.
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K7JBQ
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Posts: 85




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« Reply #16 on: November 02, 2013, 08:24:53 PM »

I've had a Varispeed for my Champion on order from Vibroplex for over two years. Scott has about given up being able to source them. So I stumbled across something dirt cheap and simple:

Binder clips, as sold at Staples and other such places. Even cheaper when liberated from the XYL.

A medium binder clip attached to the shaft cuts the speed down from about 20wpm to 15. I haven't tried it, but I'll bet the large size would get in under 13.

Takes five seconds to switch from 20wpm to 15 this way. If somebody wants to go slower than that, I have the Czech Army Key at the ready as well.

73,
Bill
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K7KBN
Member

Posts: 3479




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« Reply #17 on: November 03, 2013, 09:43:13 AM »

Our little group of guys (and a couple of gals) licensed in the late 1950s/early 1960s used clothespins: cheap, easily obtainable and effective.
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73
Pat K7KBN
CWO4 USNR Ret.
LUCYAJONES
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Posts: 16




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« Reply #18 on: October 10, 2017, 10:03:13 PM »

The Vibroplex Original currently ships with the No. 401 (one ounce) weight.  Does anyone know
the approximate speed ranges of the key with, respectively,

The No. 401 (large) weight?

The No. 402 (4/5 ounce - medium) weight?

The No. 403 (2/5 ounce - small) weight?
Cry :'(Possibly when the pendulum top is moving in an elliptic follow. You can even see if you are in the northern or southern half of the globe when the back move of the pendulum is the upper of or the lower hint of the curved
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AA4OO
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Posts: 108


WWW

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« Reply #19 on: October 16, 2017, 02:21:33 PM »

The Vibroplex Original currently ships with the No. 401 (one ounce) weight.  Does anyone know
the approximate speed ranges of the key with, respectively,

The No. 401 (large) weight?

The No. 402 (4/5 ounce - medium) weight?

The No. 403 (2/5 ounce - small) weight?

My Original Standard Bug (circa 70s) slowest DIT speed with the stock, large weight is 24 wpm.

I purchased an aftermarket ferrous 2 ounce weight and that gets it down to about 19 wpm.
With a Varispeed attachment it will go down to 13 wpm.

The aftermarket ferrous weight allows small magnets to be added which will let it go as low as you're willing to stack the magnets, but the extra mass (like the Vari-Speed) makes it feel very weird. So ~20 wpm is about as low as I like to operate it.  I switch to a straight key below that speed.
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K3STX
Member

Posts: 1589




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« Reply #20 on: October 17, 2017, 05:57:20 AM »

It also depends on the thickness of the mainspring! Old Champions (that were for the novice group) used a thinner mainspring (0.012") whereas Originals and Lightning bugs were thinner (0.014-0.016").

paul
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N9AOP
Member

Posts: 664




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« Reply #21 on: October 17, 2017, 01:11:01 PM »

I remember the old guys wrapping thick solder around the weight to slow it down.  Is the Coriolis effect the reason that the swing is different depending whether you are in northern or southern hemisphere?
Art
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HB9FXW
Member

Posts: 52




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« Reply #22 on: October 24, 2017, 02:23:56 AM »

I put a telescopic antenna from an old fm receiver as an extension for my bug and wrapped some solder at the end of it. I can now quickly adjust my bug for speeds between 15 and way-too-fast-30-something wpm but I usually keep it at about 19 wpm.
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