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Old 28th May 2010, 08:07 PM   #1
el156 is offline el156  Portugal
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Default 4pr60b valve

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
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Old 29th May 2010, 12:38 AM   #2
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there is a forum for buying and selling. this isnt it.
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Old 29th May 2010, 01:37 AM   #3
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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.
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
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