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Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Tube turned black and rainbow. Cause?
Tube turned black and rainbow. Cause?
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Old 16th February 2020, 05:37 PM   #51
kodabmx is offline kodabmx  Canada
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Tube turned black and rainbow. Cause?
It's hard to tell by the picture, but I thought they were Bakelite.

PL08 Omron Automation and Safety | Relays | DigiKey
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Old 16th February 2020, 06:19 PM   #52
marknoir is offline marknoir  United States
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Quote:
Originally Posted by smoking-amp View Post
Those are -plastic- relay sockets!! They are not rated for the high temps tubes produce. And someone already mentioned that that position gets poor air circulation. You would do well to change all the sockets to ceramic ones. The plastic may be near semi-conducting by now.
I think you are correct. But surprisingly these sockets survive in Jadis amps for 20 ys
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Old 16th February 2020, 07:05 PM   #53
marknoir is offline marknoir  United States
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Default Sockets

Quote:
Originally Posted by kodabmx View Post
It's hard to tell by the picture, but I thought they were Bakelite.

PL08 Omron Automation and Safety | Relays | DigiKey
They are Bakelite. The relays they are designed to work with sometimes carry a lot of current.
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Old 16th February 2020, 08:57 PM   #54
kodabmx is offline kodabmx  Canada
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Tube turned black and rainbow. Cause?
Then they are fine. I have Bakelite sockets that are still fine after 70 years in some equipment.
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Old 16th February 2020, 10:49 PM   #55
TonyTecson is offline TonyTecson  Philippines
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i valued the "cinch" sockets, i get them used, but they are way better than modern ceramic stuffs from china, those ceramic sockets break the center guide pin on octals...
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Old Yesterday, 02:59 PM   #56
kodabmx is offline kodabmx  Canada
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Tube turned black and rainbow. Cause?
Hey Tony. Ever use these? 20pc 8pin Bakelite vacuum tube socket octal for Chassis EL34 KT88 6550 6SN7 amps | eBay

I use these when I build with octal. The ground tabs are very handy Never had any of them loosen up.
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Old Yesterday, 11:29 PM   #57
TonyTecson is offline TonyTecson  Philippines
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Quote:
Originally Posted by kodabmx View Post
Hey Tony. Ever use these? 20pc 8pin Bakelite vacuum tube socket octal for Chassis EL34 KT88 6550 6SN7 amps | eBay

I use these when I build with octal. The ground tabs are very handy Never had any of them loosen up.
i prefer to use those cinch sockets that were pulled out from surplus military gears.....very reliable, with ground tabs too...
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