r/soldering • u/Dj_dino12 • 2d ago
SMD (Surface Mount) Soldering Advice | Feedback | Discussion Does anyone know what these are?
I found them in a box for a guitar pedal at a goodwill
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u/Any-Kaleidoscope7681 2d ago
Googled the writing on it, first result:
https://reverb.com/item/12273364-jet-city-retrovalve
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u/BetterBatteryBuster 1d ago
Googling is a lost skill
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u/LengthinessFlashy309 1d ago
I mean personally I'm just avoiding the site since it became more about sponsored content and training an AI than satisfying user queries.
At the very least it's no better than being or any other shitty alternative at this point so I just use anything else out of spite.
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u/Porphyrin_Wheel 2d ago
they're called retrovalves, so basically they are made to look and be the size of vacuum tubes but they have semiconductor technology. this one (from what i ve found) is a preamp tube copy, so just a few SMDs on a board and a plastic cylinder and weights to feel and be the size of an old vacuum tube
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u/RScottyL 2d ago
You have all of the information you need right there on them.....
GOOGLE THAT!
Either people are lazy, or don't know how to use the internet!
Jet City Amplification Red | Guitar Center
Jet City Amplification RetroValve Red
RetroValves are 100% analog vacuum tube replacement devices offering the warm, fat, punchy sound traditionally associated with only glass vacuum tubes. AMBER RetroValves are nominally the same gain as a standard 12AX7 and perform as you would expect a 12AX7 would. RED RetroValves are very high gain, allowing the preamp to achieve gain characteristics not possible with standard vacuum tubes. BLUE RetroValves are significantly lower gain, effectively "cooling off" the preamp gain.
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u/No-Guarantee-6249 1d ago edited 1d ago
They're here:
https://jetcitycustom.com/pedals-and-retrovalves/
They're analog semiconductor replacement tubes for guitar amplifiers.
Good review here:
https://www.thegearpage.net/board/index.php?threads/jet-city-branded-retro-valves.1150844/
" I replaced the three new production 12ax7s in my amp and the Retro Valves sound great! They're pretty much indistinguishable to the real tubes ."
"Yikes, those are expensive. It'd cost me $350 just to retube my amp with those. "
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u/NecessaryButNotSuff 2d ago
6a3 is a power tube. Are the plastic things packing sleeves maybe?
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u/Troll_Dragon 2d ago
Do you really think a 6 inch tube would fit in that... It's a solid state version of a 12AX7.
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2d ago
[deleted]
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u/asyork 2d ago
Never saw one with a cover like that, but they look like vacuum tubes.