The SR4T Power Supply
The SR4T is now available.
The “T” designation has been nicknamed Turbo as it provides a performance boost over the standard SR4.
The SR4 configuration uses two rectified and smoothed supply rails prior to the regulator circuitry, one for the output stage and one for the error amplifier and output stage driver stage. Both of these pre-regulator rails are configured in balanced rectification mode.
The SR4T adds an additional low power voltage regulator powering the error amplifier/output stage driver resulting in better overall regulation, better transient response/settling time and lower dynamic and static noise.
The SR4T is not the same as the DR configuration used in Paul’s SR5 and SR7 custom-build designs, as the DR configuration uses two high power voltage regulators in series. However, the SR4T version moves the performance closer to the performance of the standard SR5 and SR7 PHD Ltd products.
The SR4T has the same power rating as the standard SR4 and is also in the same chassis. For those looking for higher performance without a large cost penalty the SR4T is an excellent solution for power ratings up to 2.5A continuous (SR4T-12) or 2A continuous (SR4T-19).
SR4 dimensions – W = 110mm, H = 50mm, D = 230mm
The SR4ST-05 in the silver anodised extrusion currently costs £400.
The SR4BT-05 in the black anodised extrusion currently costs £412.
The SR4ST-12 in the silver anodised extrusion currently costs £400.
The SR4BT-12 in the black anodised extrusion currently costs £412.
The SR4ST-19 in the silver anodised extrusion currently costs £420.
The SR4BT-19 in the black anodised extrusion currently costs £432.
0.2 metre DC3CXLR annealed Copper with Teflon insulation costs £31.
0.5 metre DC3CXLR annealed Copper with Teflon insulation costs £43.
1 metre DC3CXLR annealed Copper with Teflon insulation costs £55.
0.2 metre DC3FSXLR annealed Fine Silver with Teflon insulation costs £44.
0.5 metre DC3FSXLR annealed Fine Silver with Teflon insulation costs £65.
1 metre DC3FSXLR annealed Fine Silver with Teflon insulation costs £90
*Prices subject to VAT for UK and European customers
How to order
We produce units in monthly batches, when you enquire about your order you are given what monthly batch your order would be part of. You have the option of a PayPal invoice or a direct bank transfer. If you decide on a direct bank transfer you must provide a postal address for the product to be sent to. Both payment options will incur additional charges. Currently PayPal charges between 2.9% and 5.5%, with Bank Charges ranging from £6 to £15.
If you decide to purchase a DC lead with your power supply please add in your order what size you need the connector to be, we offer 2.1mm, 2.5mm or a micro USB adapter, all of these options do not incur any further charge.
Shipping costs for the SR4 power supply including insurance for loss or damage in transit :-
Rest of the world £28
There is also the option to have your order shipped with FedEx which may speed up the delivery process, this will however come with extra costs which can be quoted to you upon enquiry.
After you have decided what unit you wish to purchase, how many and whether you would like a DC lead or not, please use the form below.