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Author Topic: Pulse service 4-400 tubes  (Read 4283 times)
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Tom W2ILA
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« on: April 28, 2007, 09:04:56 AM »

I have a pair of 4PR400 Eimacs (8188).
These are the pulsar version of the 4-400 "suited for long pulses".

Are these suitable plug-ins for standard 4-400 equipped transmitters (t-368)?

TM
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W3SLK
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« Reply #1 on: April 28, 2007, 09:23:45 AM »

Tom, as far as I know, yes they are. Eric, WB4VVI (SK) believed that the everything was little more on the 'heavy duty' side since they were rated for pulse service. For years he ran a pair in his Globe King 500 "E" model, (AKA a modified CCA 1000D modulated by 833's), with out any ill effects.
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Mike(y)/W3SLK
Invisible airwaves crackle with life, bright antenna bristle with the energy. Emotional feedback, on timeless wavelength, bearing a gift beyond lights, almost free.... Spirit of Radio/Rush
The Slab Bacon
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« Reply #2 on: April 29, 2007, 08:51:56 AM »

Tom,
        To the best of my knowledge the pulse rated tubes are just a little higher grade of their standard versions. (and acually a litle more desireable). Many people have been using them for replacements for many years without any problems.
                                                                                                 The Slab Bacon
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"No is not an answer and failure is not an option!"
WA1GFZ
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« Reply #3 on: April 29, 2007, 08:55:03 PM »

some PR tubes take more heater amps
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