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Author Topic: What was the use/application of this resistor??  (Read 2270 times)
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wb1ead
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« on: May 01, 2017, 05:25:30 PM »

Hello all..found a puzzling to me resistor at a local flea market (not a hamfest)..it's a rather large pwr resistor of only 1 ohm..is this maybe a "damp chaser" used in some rigs in an always on state to help with stability of vfo/oscillators?

                Here's the specs...made by Clarostat Dover NH..1 ohm..no wattage given..box label says VK-100-N..1 ohm..370-222
physical size 6" long by 3/4" usual hollow ceramic wire wound..solder tabs one on each end
                 Sure if I was a better "looker-upper" on the web I just might get my answer..sadly I'm not able to!..valuable?..does someone here need it?          thx in advance!   73 de DAVE..Nearfest is just around the corner..YEA!!
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KA2DZT
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« Reply #1 on: May 01, 2017, 08:03:33 PM »

No mystery, it's a 100 watt 1 ohm resistor.

Looked it up in the Clarostat catalog (1963).  100 watt 1 ohm.  Nothing special about it, the sizes were from 1 ohm to 200 Kohm.
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WD8BIL
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« Reply #2 on: May 02, 2017, 01:00:05 PM »

They're used a lot in AC and DC load boxes.


* 48VDC 150amp load.jpg (40.8 KB, 453x389 - viewed 215 times.)
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KA2DZT
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« Reply #3 on: May 02, 2017, 02:14:09 PM »

They're used a lot in AC and DC load boxes.


Budly

I built a load box something like the one you pictured.

0.4 ohms at 1800 watts and 0.6 ohms at 1200 watts.  Two sections, using all 300 watt Ohmite resistors.

Fred
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WD8BIL
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« Reply #4 on: May 02, 2017, 05:27:39 PM »

Hi Fred!

Good deal.

We use a multitude of load boxes at work from 100 to 10,000 amps for testing Telecom power systems. I've replaced many of these resistors and load elements in my time!!!

Good to hear from you Fred (no longer 51!)
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