To: <amps@contesting.com>
>> Date: Sun, 10 Aug 97 19:41:21 +0000
>
>> - For example: When the second tube is added to a 77dx, and the tubes
>> are driven to 2A of anode current, the stock tank's operating Q on 160m
>> drops to about 5.9. IMO, this is not good engineering practice.
>
>That may be your opinion, but it is most likely not a real
>concern. There is no rule or law that says the Q needs to be
>"twelve". ...snip...
Eimac recommends a Q of 10 to 15.
According to Vince Fedele, a problem with adding the second tube to the
77dx, is low efficiency and reduced output on 160m. A tank that is
designed to work properly with one tube is not going to do so if a second
tube is added. IMO, an efficiency of 45% does not indicate good
engineering practice.
Rich---
R. L. Measures, 805-386-3734, AG6K
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