50 OHM Dummy Load:
I will be pulling some posts over here manually from a private forum for a little while.
I built this 50 ohm dummy load with a quart paint can, a small sheet of tin, 20 1K 3watt resistors, a BNC panel mount connector and mineral oil.
Less then $15 in parts. I actually used baby oil for half (had a bit on hand) because the mineral oil at walgreens was $6 and the baby oil at target $2.70. Only difference is the baby oil contains some fragrance. Still non-conductive. Resistors from digikey. Tin and paint can from the hardware store. BNC connector salvaged from dead equipment.
Measured 49.9 ohms on the Fluke 87 with a quick test.
I will test the SWR or how close the impedance is to 50 ohms as frequency increases next week sometime. This will be used with the Kenwood TS-520 I have been working on. Should be able to take 130Watts for at least short durations.
Pictures:
Less then $15 in parts. I actually used baby oil for half (had a bit on hand) because the mineral oil at walgreens was $6 and the baby oil at target $2.70. Only difference is the baby oil contains some fragrance. Still non-conductive. Resistors from digikey. Tin and paint can from the hardware store. BNC connector salvaged from dead equipment.
Measured 49.9 ohms on the Fluke 87 with a quick test.
I will test the SWR or how close the impedance is to 50 ohms as frequency increases next week sometime. This will be used with the Kenwood TS-520 I have been working on. Should be able to take 130Watts for at least short durations.
Pictures:
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