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Old 13th June 2006, 06:45 AM   #1
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Default Physically small rectifier tube with 5V heaters

Can anyone suggest one? Thanks.
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Old 13th June 2006, 08:28 AM   #2
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All the ones I know of with 5V heaters are octal
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Old 13th June 2006, 08:38 AM   #3
rpapps is offline rpapps  Antarctica
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Like 5Y3 for example.
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Old 13th June 2006, 08:51 AM   #4
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Default Re: Physically small rectifier tube with 5V heaters

Quote:
Originally posted by dsavitsk
Can anyone suggest one? Thanks.
With what PIV and current ratings?
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Old 13th June 2006, 09:32 AM   #5
SHiFTY is offline SHiFTY  New Zealand
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GZ34 / 5AR4 is the god of all rectifiers. Small, slow starting, high current and low voltage drop. Needs 2.3A for heater.
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Old 13th June 2006, 09:55 AM   #6
arnoldc is offline arnoldc  Philippines
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I searched the TDSL database for FW rectifiers with 5V heaters and nly octal or UX4 came out.

I use 5Y3 when I need to drop lotsa voltage and 5AR4 for efficiency and slow turn on But I guess you know that already.
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Old 13th June 2006, 03:44 PM   #7
Sheldon is offline Sheldon  United States
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Default Re: Physically small rectifier tube with 5V heaters

Quote:
Originally posted by dsavitsk
Can anyone suggest one? Thanks.
If you don't mind breaking "rules", you could use one of the smaller 6.3v jobs that were designed for car radios. They will tolerate a pretty wide range of heater voltages. The 6x4, for instance is rated from 5 to 8 volts, http://www.mif.pg.gda.pl/homepages/f...137/6/6X4.pdf. Should be ok, especially if your 5v winding is rated for higher current and puts out a little more than 5v.

Sheldon
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Old 14th June 2006, 02:47 AM   #8
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Speaking of those.... I like 6X4's (or EZ81 for higher current) and just use a bridge and filter cap, then dropping resistor. Not KISS, but a way to use a little 6V heater from a 5V supply
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