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1. [AMPS] 4 off 4CX250BM Designs (score: 1): Author: G3CWI@aol.com (G3CWI@aol.com); Date: Wed, 24 Mar 1999 12:07:38 EST; I pick up 4 new 4CX250BM valves at a hamfest recently. Does anyone know a source of a design using 4 valves for the HF bands? Presumably they can simply be operated in parallel but will I need indepe; /archives//html/Amps/1999-03/msg00596.html (7,056 bytes)
2. [AMPS] 4 off 4CX250BM Designs (score: 1): Author: g.jones@bom.gov.au (Graham Jones); Date: Thu, 25 Mar 1999 10:33:20 +1100; Hello Richard, I have a 1KW PEP output commercial linear using quad 4CX250B PA tubes, built by an Australian company Codan in the mid-1970's. It was originally designed for autotune operation from 2; /archives//html/Amps/1999-03/msg00600.html (10,345 bytes)
3. [AMPS] 4 off 4CX250BM Designs (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 24 Mar 1999 19:14:28 -0800; ? For linear amplifier service, I would put a separate vhf supp. on each anode, use maximal screen and anode potentials, put around 1 ohm in series with each grid, and terminate the grid with 12-ohm; /archives//html/Amps/1999-03/msg00603.html (7,717 bytes)
4. [AMPS] 4 off 4CX250BM Designs (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Fri, 26 Mar 1999 12:42:44 -0500; For reasonable matching you can install individual bias pots and do a simple static adjustment for equal idle currents. Not as good as dynamic balancing but close. The Tokyo High Power HL-1K used a p; /archives//html/Amps/1999-03/msg00625.html (8,480 bytes)

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