2007年1月7日 · What I'm trying to do, basically, is come up with a low cost, higher-power amp using 1625's, which are basically the equivalent of the 807, except having a 12.6v filament and …

The 1625 is electrically identical to the 807, except for the heater requirements and base cap. At 12.6 Volts the 1625 would have been designed for mobile equipment. The base looks like UX7 …

2017年7月8日 · The original 1625 amp I felt didn't have quite enough gain. The Mk II will deliver full 25 watts output when both channels are driven, and it will do that with only 0.4 volts input, …

2021年10月1日 · The 1625 (VT-136) is an 807 variant with a 12.6 V heater and a 7-pin base. These tubes were used as RF power amplifiers in some of the SCR-274 and AN/ARC-5 …

2012年12月26日 · It's been a long, long time since I've heard a single-ended pentode (SEP) amplifier. The popular thing to do is to use the 300B, but hey, I'm a cheapskate who still likes …

This Push-Pull 1625/807 power amp is a clone of the long-skilled work of several world-class designers. The spatial resolution and the musical credibility are well beyond its appearance. …

anyone else done a 1625 SE amp on the cheap ? Just treat them like an 807 or 6L6. Idle current is quite dependant on both load and B+ ( but more specifically g2 voltage if yer running …

1625 tube provides larger thrust, improved vocal interpretation, and likable sound (HIFI EXQUIS co, limited). Similar to 6P3 in sound, but with highlighted performance, expressing warrior …

MP-402 MK2 is high output power push pull tube amplifier employing eight legendary FU25 (1625) power tubes. It can produce 75W per channel into 8Ω and 4Ω. It sounds very …

2017年4月8日 · SCHEMATIC DIAGRAM 1625 Amp Mk Il For hobby/non-profit use only Gain: 12AX7 (Open loop): 45x 12AX7 (closed loop): 6.6x 6SN7 (each output to ground): 7.5x AC …