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August 21st 08, 01:25 AM
posted to rec.radio.amateur.boatanchors
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Johnson T-R switch receive port output levels?
On Aug 20, 9:37*am, "Bob Spooner" wrote:
I have acquired a Johnson T-R switch and during testing at 3.5+ MHz. and about 100W into a good dummy load, with the receive port terminated with 51 ohms I'm seeing an initial level on the order of four volts peak before the 6BL7 shuts off and reduces the level. *Is this normal? If not, what is normal? Thanks. 73, Bob *AD3K Bob,I haven`t used one of these in years ,But, I think that 4 volts at rec terminals would be acceptable ..At 4 volts on rec terminals not enough current would flow to do any damage to the input circuit..High voltage to rec terminals ,like lightning surges etc are the ones that do damage.. GL Harold W4PQW |
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