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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Can I sub a GZ37 for a 5U4G in a.... posted by Jovy on June 9, 2003 at 02:18:01:
The GZ37 is an excellent rectifier with low voltage drop, high current capability and of course, is indirectly heated. It is equivalent to the CV378 and most data sheets say "identical or close" to the 5U4G. I've use both and will readily fit a GZ37 in place of the directly-heated 5U4G. It draws a touch less filament current (2.8 amps vs 3.0 amps), so it won't stress your transformer. It also has about 10% higher voltage and current rating than the 5U4G - so it is unlikely to do anything in your amp, but give you a slow start-up and that's exactly what you're looking for. However, always make sure that the first filter cap is within the maximum allowable size for any particular rectifier, as this is very important.If you ever want a bit more DC voltage, don't overlook the physically-smaller 5V4G ... provided your voltage and current requirements fall within this tube's ratings (375-0-375V, 175mA). It has among the lowest of all voltage drops so you will get a few more DC volts to liven up your circuit. This will affect all operating points/bias settings, so make sure you really need the extra voltage before you just plug one in.
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Follow Ups
- Re: Can I sub a GZ37 for a 5U4G in a.... - johnny2 06/9/0303:20:47 06/9/03 (5)
- Re: Can I sub a GZ37 for a 5U4G in a.... - mcs 04:34:37 06/9/03 (4)
- Re: Can I sub a GZ37 for a 5U4G in a.... - Maciek P 05:20:19 06/9/03 (3)
- Re: Can I sub a GZ37 for a 5U4G in a.... - mcs 05:35:40 06/9/03 (2)
- Re: Can I sub a GZ37 for a 5U4G in a.... - Maciek P 05:38:57 06/9/03 (1)
- Thanks, all! (nt) - Jovy 03:29:51 06/10/03 (0)
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