The Psu PCB is available in my shop:
I reworked a PSU design, because the most bipolar psu pcbs doesn't match with my requirements.
This Psu is great in combination with an Yamaha PA-30, perfect for the TTSH - no EMV problems or hum from the switching DC solution and no hum on the reverb.
The Yamaha PA-30 gives you around 700mA on 15V and 700mA on -15V.
Inputs and Outputs are mechanical very stable and the pcb can be attached by 6 Screws.
The Voltage regulators can be mount directly (with isolation/glimmer pads) on a metal case like the TTSH or with cooling frames.
you can use MTA100 headers instead of the LEDs - to connect 1 or 2 external Led holder in your device.
Its important to double check every rectifier/diode and capacitor and your wiring before you test the circuit.
for SW1: don't use the MTA header- connect the cable directly.
the 3pole PSU Connector for the Yamaha PA30 is available on TME. FC684203
just install all parts from the BOM. use Glimmer(isolation) in case you attach both regulators to the same metal/cooler
for the switch SW1 - don't use a header - connect directly cables to SW1.
use the trimmer to get the correct voltage
wiring for Sw1:
use at the input fuses (F1/F2) the value which your AC-AC transformer offer - for the Yamaha PA.30 its max. 750mA - you need for F1 and F2 750-800mA fuses,
normally FAST blow fuses are not good in this circuit, please use medium or slow blow fuse types !!
for the secondary fuse use a value which is 10-20% bigger than what your device ask (for example a TTSH works great with 2x 500mA fuses and should be work with a 320mA too (depends on the additional mods)
Example for TTSH installation:
the case of the TTSH is used as a cooling block
Heres´an example of an isolated Installation with Glimmer and plastic rings - its important that both voltage regulators are isolated - there's also a plastic inlet on bottom of the nut which isolated the screw from the voltage regulator body.
If using a 15-0 15-0 toroidal transformer , does the two 0v go to the middle two connections , the two 15vAC wires go to AC and AC1 , or shall I wire the transformer as a centre tap 15-0-15 , and take the 0v two one of the middle terminals
Thank you , two PCB`s purchased
Just to make sure , you said yes to
1: If using a 15-0 15-0 toroidal transformer , does the two 0v go to the middle two connections , the two 15vAC wires go to AC and AC1
2: Or shall I wire the transformer as a centre tap 15-0-15 , and take the 0v to one of the middle terminals
It’s the same .
OK , thanks
one more question , the PSU works great , but if I need to get it to +- 12 volts , ( the minimum I can get is 14.45v) what would I have to do
you have to change the resistors, which select the voltage of the regulators.
same for Lm337
Hi, TTSH V4 front panel uses SPDT rocker switch CWT12AAS1. Do you know of a suitable DPDT / DPST switch with similar dimensions (no front panel modification needed), that could be used with BIPO? / have you used switch with different dimensions?