Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => AmpTools/Tech Tips => Topic started by: kagliostro on July 15, 2013, 12:55:49 pm

Title: An interesting regulator to have 5v for relays from 6.3v heater winding
Post by: kagliostro on July 15, 2013, 12:55:49 pm

This regulator has a drop of only 1v

http://docs-europe.electrocomponents.com/webdocs/0098/0900766b80098772.pdf (http://docs-europe.electrocomponents.com/webdocs/0098/0900766b80098772.pdf)

http://it.rs-online.com/web/p/regolatori-di-tensione-low-dropout/5455720/ (http://it.rs-online.com/web/p/regolatori-di-tensione-low-dropout/5455720/)

so it can be used as to obtain the 5v necessary for the relays

starting from the 6.3v heater winding

K

Title: Re: An interesting regulator to have 5v for relays from 6.3v heater winding
Post by: PRR on July 15, 2013, 02:52:19 pm

True; but relays don't need regulated power. Throw a few dozen ohms in series with the 5V coil to get 4.5V-7V, they will be fine.

Title: Re: An interesting regulator to have 5v for relays from 6.3v heater winding
Post by: kagliostro on July 15, 2013, 05:48:55 pm

Quote

Throw a few dozen ohms in series with the 5V coil to get 4.5V-7V, they will be fine.

Touchè

K