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View Full Version : PT values for 5E3, 5E9A and 5F11


tubeswell
03-12-2008, 10:22 PM
Hi there

I am mulling over which one to build next.

Since I am in the amp modding backwater of the planet I have to get the PTs and OTs made up especially.

I was wondering if there was much difference in the PT volts/amps values for the above

My guess is that the 5E3 is something like:
320-0-320 1A (With a 5Y3GT, or is that too high?)
5 - 5 2A
6.3-0-6.3 3A

(Hope I've got enough buffer in those current values)

I can't see there would be any difference for the 5F11 (same number and type of valves)

But does this change much if you go to a 5U4GA and add a 12AX7 (for 5E9A)?

Cheers

sportster4eva
03-14-2008, 06:54 PM
A 5u4 draws 3 amps from the 5volt winding, so a higher capacity transformer would be needed, to use that rectifier. 1000ma of B+ :eek:.... was that a typo?
320-0-320 is fine. If you have the room on your chassis, the Vibrolux tranny is the ticket.

TRANSFORMER, POWER, FENDER REPLACEMENT, 325-0-325 V, 180 mA

P-TF22723

Replacement for Fender Vibrolux. Equivalent to #125P26A & # 036483. 35 Watts.

Primary: 117 volt, 60 Hz
Secondary: 325-0-325 V, 365VDC@180 mA(DC) with 50 V bias tap
Filament winding 1: 6.3 V, 4 A
Rectifier Filament: 5 V, 3 A
Mounting centers: 2.5" x 3.125"
Weight: 6.5 lbs.

sportster4eva
03-14-2008, 07:00 PM
Ooops,, didn't see the part about where you're from.. Sorry.. Anyway those specs I posted are good for the circuits you mentioned.

Bruce / Mission Amps
03-14-2008, 08:02 PM
A 5u4 draws 3 amps from the 5volt winding, so a higher capacity transformer would be needed, to use that rectifier. 1000ma of B+ :eek:.... was that a typo?
320-0-320 is fine. If you have the room on your chassis, the Vibrolux tranny is the ticket.

TRANSFORMER, POWER, FENDER REPLACEMENT, 325-0-325 V, 180 mA

P-TF22723

Replacement for Fender Vibrolux. Equivalent to #125P26A & # 036483. 35 Watts.

Primary: 117 volt, 60 Hz
Secondary: 325-0-325 V, 365VDC@180 mA(DC) with 50 V bias tap
Filament winding 1: 6.3 V, 4 A
Rectifier Filament: 5 V, 3 A
Mounting centers: 2.5" x 3.125"
Weight: 6.5 lbs.

The amp he is talking about is a little thing making less then 10-12 watts.
You are thinking brown or black face amps. Totally wrong transformer for his projects.

sportster4eva
03-14-2008, 08:22 PM
True, it would be overkill for sure, but a 5u4 rectifier was mentioned. If that weren't the case then something like a deluxe trans. would do it.