Physically small rectifier tube with 5V heaters

[dsavitsk]

Can anyone suggest one? Thanks.

 

[Geek]

All the ones I know of with 5V heaters are octal 🙁

 

[rpapps]

Like 5Y3 for example.

 

[i_should_coco]

Can anyone suggest one? Thanks.

With what PIV and current ratings?

 

[SHiFTY]

GZ34 / 5AR4 is the god of all rectifiers. Small, slow starting, high current and low voltage drop. Needs 2.3A for heater.

 

[arnoldc]

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.

 

[Sheldon]

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/frank/sheets/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

 

[Geek]

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 🙂