[Amps] Tube choice for SB-200 on 6 meters

[Larry]

Re: [Amps] Tube choice for SB-200 on 6 meters
 Yes, I believe that would be a natural color during normal operations for
the 3-500Z and the 572B(which is what I was refering to), but if they turn
cherry red during tune-up, I would think that would tell me that there's a
major problem somewhere, or I'm tuning WAY too long. Again, under normal
operating conditions once tuned, it would be OK .  ...Larry
    -----Original Message-----
    From: Steve Katz [mailto:stevek at jmr.com]
    Sent: Sunday, July 12, 2009 8:45 PM
    To: Roger; n1miw at cox.net
    Cc: Amps at contesting.com
    Subject: RE: [Amps] Tube choice for SB-200 on 6 meters


    What's wrong with running 3-500Zs "cherry red?"  I think that's a fairly
natural color for them; they cool by emission, mostly, and "red" is a pretty
normal color.

    Bright orange/yellow is hotter, and I've run 3-500Zs at that color
temperature lots of times.  My last set lasted 22 years, operated like that
almost every day.

    WB2WIK/6


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