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#6
July 24th 05, 10:29 PM
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artie wrote: In article , Murray Green, K3BEQ wrote: Another ham friend and me both have 100 w slugs for 100-250 Mhz. (100c). Both are bad. Tests were made on three different Bird meters and a 3rd slug known to be good. On all 3 meters inputting 100 w, the good slug showed 100 watts while the two bad ones showed 70 w and 60 w respectively. Pretty high odds that we both would have faulty slugs eh? So the questions a what happened to make them go bad, and can they be reasonably repaired by the Bird Corporation? Although we will be calling Bird personnel next week I thought I would throw out the question here. Last but not least, any good 100w 100-250 Mhz slugs out there for sale? 73 K3BEQ Could have been as simple as dropping them -- which is why I'm hesitant to buy slugs at hamfests if I can't check 'em out. Don't remember what frequency the crossover occurs, but at a fairly low frequency, around 2 meters iirc, coupling in the slug changes from a variable capacitor that's adjusted to making the adjustment by moving the coupling element. The coupling adjustment is underneath the label on the top of the slug. Bird used to offer a recal service that was fairly reasonable. Oh, and you are using a good dummy load for those tests, like a Bird dummy load that's still providing a flat 50 ohm load at your test frequency, right? (I've got a "new" Bird -- it's only about 30 years old.) -- Namaste-- |
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