[BC] AM HD power levels

[Powell E. Way III]

On the RCA now retired and sleeping at WKDK, the modulator tubes would last almost a year at first, and then when Eimac got bad, less. The Amperex ones we used would do 9 months and then drop off a cliff. The tubes in the RF part lasted a really long time. At a hamfest Ray the CE some years back got some really REALLY old NOS Eimac tubes. They lasted almost 2 years in modulator service before gettting weak. Now we have a BE AM1a and it just purrs along.  


Powell W4OPW and @ WKDK 


Powell





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POP email is powell at backroads  DOT     net


--- On Tue, 9/2/08, W2XJ <W2XJ at nyc.rr.com> wrote:

> I have always felt that way about 4-400s. An 833 equipped
> transmitter 
> had tube life measured in years. A new 20V3 with 4-400s
> went 6 to 9 
> months on a set of tubes. I have always felt that it was
> just false 
> economy, especially when electricity was dirt cheap. I
> think the 
> argument about fidelity is somewhat misleading.  The Iron
> in a plate mod 
> transmitter is the primary thing that determines fidelity.
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