>> It has been said, "GE Medical cancelled the contract
>> years after Eimac fixed the heat dam problem." This
>> statement is wrong. The amplifiers which replaced the
>> ETO amplifiers have been decommissioned for quite some
>> time, and you can purchase subassemblies at hamfests.
>> I did just that - and the 300 watt solid state driver
>> board which I obtained thusly has a date code on it of
>> early 1988. Eimac has acknowledged that tubes
>> manufactured from June 1986 to August 1988 were
>> defective. So it would seem the replacement amplifier
>> was in production while the cathode dam episode was
>> ensuing and anybody who understands the engineering
>> process will correctly surmise that the amplifier was
>> under development even before the cathode dam episode
>> began. The amplifier was, in fact, a custom, built
>> for GE.
>
>Thanks for helping dispel the false rumors about ETO and 8877's.
>
It might be a good idea to hold off a bit on lighting up the victory
cigar, Tom. ETO's loss of the GE Medical contract apparently had nothing
to do with the timing of Eimac's 14-month 8877-heat dam problem.
>The most unfortunate thing in all of this is the amateur radio fraternity
>has been receiving (and some people actually believe) incorrect technical
>information that is supported by false claims and fabricated stories! All of
>it originated by one person!
Tom's Correct Technical Information:
1. Dipmeter's can't find VHF resonances.
2. Ni-Cr alloys have less RF resistance as frequency decreases.
3. AC circuit analysis doesn't work with parasite suppressors.
4. Feedback C can always be safely ignored in HF amplifiers.
5. Overdriving a 3-500Z can produce 10,000v at the input of a 4k-ohm to
50-ohm Pi-network with a 50-ohm termination. (12.5kW pep)
>
>73 Tom
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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