On Jul 15, 2004, at 7:53 AM, Dino Darling wrote:
I was told, by a wise person, that if you need more than TWO tubes to
get the desired output, GET BIGGER TUBES!
•• It's good advice. Each time, one adds a tube, it increases
feedback-C, which is not a good thing unless one is designing a VHF
oscillator. For example, one 3-500Z amplifiers seemingly toast fewer
bandswitches due to intermittent arcing than two 3-500Z amplifiers.
Another factor is cost. For example, two 8877s cost more than one
8171, and they will deliver only about 1/3 the output of an 8171 .
However, the socket for an 8171 costs more.
- cheers, Dino
I too have been curiuos whay there is a lack of 4CX250Bs in the
Amateur market.
At 06:22 PM 07/14/2004 +1200, you wrote:
Hi all,
Is there some reason why there seems to be very few HF amps built
around the 4cx250b's? They seem to be cheep and very plentiful.
I am thinking of building an HF amp using 3 or 4 4cx250b's. Is there
anything wrong with doing this?
Cheers
Jerry
Dino...k6rix@earthlink.net
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|