Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Captain chunkulus on January 24, 2019, 08:24:05 am

Title: Small transformer for space rack, with heater tap and 12v secondary.
Post by: Captain chunkulus on January 24, 2019, 08:24:05 am

Any of you guys know of a good transformer that the will fit a space rack chassis with a heater tap and a 12v secondary? Thanks.

Title: Re: Small transformer for space rack, with heater tap and 12v secondary.
Post by: 1blueheron on January 24, 2019, 10:06:45 am

By "space rack" I am assuming you mean single U rack space for 19"rack mount?? 

You might want to take a look at toroidal style transformers.  Typically they would have a lower profile than an E&I style.

Something like this maybe?  https://www.toroidal-transformer.com/shop/high-end-audio/power-transformers/730/3n1904--xn1904--voedingstrafo-voor-buizenversterkers-71va.html

Do you just need 6.3V and 12V.  No HT?

Title: Re: Small transformer for space rack, with heater tap and 12v secondary.
Post by: Captain chunkulus on January 24, 2019, 10:28:26 am

2 space rack sorry. I need a primary for power and 2 secondaries. Both could be 6.3 volts. One for heaters and one for relays.

Title: Re: Small transformer for space rack, with heater tap and 12v secondary.
Post by: 1blueheron on January 24, 2019, 11:35:55 am

Could you use dual primary dual secondary and just feed both primaries from the same AC power source?

These look like they fit your requirements.

https://www.mouser.com/datasheet/2/177/266-948812.pdf

Title: Re: Small transformer for space rack, with heater tap and 12v secondary.
Post by: dunner84 on January 24, 2019, 01:28:55 pm

2 Hammond 229 series transformers