2010年12月23日 · I've often wondered what they'd sound like in a UL push pull amp. I have heard a couple of 47 pentode based SE amplifiers, all triode strapped. All sounded very good.

It's a Single-ended 47 Pentode amp. I chose the copper chassis and mahogany side. panels to make something a little different from my regular amps. I think it looks pretty good. It sounds …

2021年8月29日 · These are the schematics for SE amplifiers with the 47 (= UY274B) in pentode mode that I have in my collection. That second amp might be able to be used without the …

2021年8月29日 · Ideas for a 47 SE amp in pentode mode. Lately I got a bug to build a fleapower amp using the early globe style 5 pin tubes. I picked up a pair of RCA 47 and a pair of 27 …

Vintage47amps 'Classic 47 Series' guitar & harp amplifiers are the most accurate & period correct Valco style reproduction amplifiers being built today. Our amps are 100% hand built following …

The Type 47 is an audio output pentode delivering up to 2.7 Watts. The classic envelope is 49 mm in diameter, and excluding the UX5 base pins is 106 mm tall. The base is 35 mm in …

2020年7月25日 · Taking the 47 (or 46) around 200V and 30mA gets the best out of it. You also need to watch out for some old valves as they may struggle to provide full swing at low …

2020年7月25日 · Interested in seeing who is using any of these three tubes for a line stage, preamp or driver stage. Ale Moglia is a fan of both 46 and 47, see here... I have also used 46 …

2022年12月12日 · GlassWare的SE AMP CAD可以说是已知的同类真空管线路设计软件中的佼佼者，但它并非一个免费软件，软件编写者连功能受限的共享版都懒得发布，可见其层次与清 …

2012年12月7日 · I'm currently testing the tubes 46, 47 and 6A4 in single ended triode and pentode modes. I built a prototype in an aluminum tray. I used a cardboard open baffle with a …