04-14-2020, 10:30 AM
Have you tried the PSU-PRE Power Supply Kit for Preamps? Post your comments or questions here!
![[Image: psu-pre-new-1-297x300.jpg]](https://londonpower.com/wp-content/uploads/psu-pre-new-1-297x300.jpg)
The PSU-PRE power supply kit for preamps is low-profile and will fit inside a 1U rack chassis. It uses a pair of DC, well-filtered, standard Hammond 229-series transformers to create the heater and plate supplies. The plate supply has two nodes that can be individually tapped with paired wiring. The heater supply can be wired for either 6V or 12V; 12Vr is preferred for use with London Power preamp kits and for using the ERK Electronic Relay Kit for channel switching. The heater supply also supports the switching circuits.
The regulated heater output can support up to two/four 300mA heaters at 6Vac or up to two/four 150mA heaters at 12Vac. There are three Links on-board that set the heater transformer wiring and regulator output to "6V" or "12V". The regulator keeps the heater voltage hum free.
There are two basic versions:
PSU-PRE-12 can support up to two 12A_7 tubes - enough for a 2-channel preamp
PSU-PRE-24 can support up to four 12A_7 tubes - enough for a 3-channel preamp
Read more about the PSU-PRE at https://londonpower.com/electronics/tube-preamp-power-supply/ .
If you're interested in London Power's tube preamp kits, see this page: https://londonpower.com/preamp-kit-selection/ .
![[Image: psu-pre-new-1-297x300.jpg]](https://londonpower.com/wp-content/uploads/psu-pre-new-1-297x300.jpg)
The PSU-PRE power supply kit for preamps is low-profile and will fit inside a 1U rack chassis. It uses a pair of DC, well-filtered, standard Hammond 229-series transformers to create the heater and plate supplies. The plate supply has two nodes that can be individually tapped with paired wiring. The heater supply can be wired for either 6V or 12V; 12Vr is preferred for use with London Power preamp kits and for using the ERK Electronic Relay Kit for channel switching. The heater supply also supports the switching circuits.
The regulated heater output can support up to two/four 300mA heaters at 6Vac or up to two/four 150mA heaters at 12Vac. There are three Links on-board that set the heater transformer wiring and regulator output to "6V" or "12V". The regulator keeps the heater voltage hum free.
There are two basic versions:
PSU-PRE-12 can support up to two 12A_7 tubes - enough for a 2-channel preamp
PSU-PRE-24 can support up to four 12A_7 tubes - enough for a 3-channel preamp
Read more about the PSU-PRE at https://londonpower.com/electronics/tube-preamp-power-supply/ .
If you're interested in London Power's tube preamp kits, see this page: https://londonpower.com/preamp-kit-selection/ .