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Old 28th May 2010, 07:07 PM   #1
el156 is offline el156  Portugal
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Default 4pr60b valve

Hi!
I have a tube 4PR60B new in box, and i have no use for it,since it is an RF tube, and i have no interest in RF ,so if there is someone interested in buy/swap let me know!
Thanks a lot
Silvino
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Old 28th May 2010, 11:38 PM   #2
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there is a forum for buying and selling. this isnt it.
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Old 29th May 2010, 12:37 AM   #3
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Quote:
I have a tube 4PR60B new in box
The 4PR60 isn't actually an RF tube. It is a pulse modulator intended for gating a high voltage in laser or radar service. I have not tested the 4PR60, but I did get several 4PR400's from a laser that was scrapped. They are useful for making a really big audio amplifier, but you would need to find another one since they don't seem to like SE use. I toyed with using a power transformer as an OPT but the frequency response sucked so I made a big RF amp and sold it. That was 30 years ago.
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