>
>Henry 4K Ultra (3CX1500A7) vs.
>Henry 3K Classic X MkII (3CX1200A7)
>> I have the opportunity to purchase one of these two amps. Any help with
>> the pros/cons of each would be appreciated. Thanks. Mike-K6QD
>
// The 3CX1200A7 has been obsoleted by the 3CX1200Z7. The ...A7 has
much feedback C. Thus, it can become a VHF oscillator. The Z7 has about
one-tenth as much feedback C, so it tends to be more stable. The
3CX1500A7/8877 also has little feedback C, however, one should probably
use a low VHF-Q/VHF-Rp suppressor to minimize intermittent parasites.
/see Figure 24 on my Web site/
>--
cheers, Mike
- R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.
end
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