Trident failures
I have just had my second 1.2v Vdd Trident failure. The first time I was mucking about occasionally, and thought it could have been something I did. This time it happened out of the blue after the DAC had been running for months without change. I have my Placid set at 5.05v, but have noticed that the new recommended input voltage is 5.25v. Could this be it, or is it a design flaw possibly? I took this as a hint that it was past time I upgraded to version 3, but still I would like to know if I should be doing something differently.
TIA!
I have just had my second 1.2v Vdd Trident failure. The first time I was mucking about occasionally, and thought it could have been something I did. This time it happened out of the blue after the DAC had been running for months without change. I have my Placid set at 5.05v, but have noticed that the new recommended input voltage is 5.25v. Could this be it, or is it a design flaw possibly? I took this as a hint that it was past time I upgraded to version 3, but still I would like to know if I should be doing something differently.
TIA!
No Worries...
4est. If you replace with the newer version you will have no more failures. I experienced a couple of trnasistor failures on the old Trident 1.2 V version as well. It is a heat issue due to the voltage drop this reg has to deal with. When I repaired mine I actually made two tiny heat sinks out of some copper sheet, and glued them to the transistors, everything ran smooth then for a long time.
But the new Tridents have beefier transistors and exhibit no such problems. Upgrade the AVCC as well, you will not be sorry.
4est. If you replace with the newer version you will have no more failures. I experienced a couple of trnasistor failures on the old Trident 1.2 V version as well. It is a heat issue due to the voltage drop this reg has to deal with. When I repaired mine I actually made two tiny heat sinks out of some copper sheet, and glued them to the transistors, everything ran smooth then for a long time.
But the new Tridents have beefier transistors and exhibit no such problems. Upgrade the AVCC as well, you will not be sorry.
Honestly I have not attempted to repair the Tridents as I had a replacement on hand last time, and want the new version this time.
Thank you Barrows, that was what I was looking to know! They were mounted vertically ala the original BII style.
I replaced the AVCC straight away when they came out and loved the change- better PRaT, more organic.
I replaced the AVCC straight away when they came out and loved the change- better PRaT, more organic.
Trident 1,2 V Q1/Q2 replacement?
Hi,
one of my 1.1 version of 1.2 V trident stopped working. So I would like to replace the transistors Q1/Q2. I have some bc860C type. would this be ok?
thx
branko
Hi,
one of my 1.1 version of 1.2 V trident stopped working. So I would like to replace the transistors Q1/Q2. I have some bc860C type. would this be ok?
thx
branko
I have a spare unused V3 Trident configured for 1.2V, which I can make use of if I can reconfigure it for 3.3V. I've done some research and believe I can do that by setting R3 = 100K and R8 = 1K47
Will be grateful if this could be confirmed.
Many thanks
Will be grateful if this could be confirmed.
Many thanks
And.... Since i have my dac quite "hot" placed, i started to thinking about replacing only the 1.2V reg with a series instead of a shunt... would i need to update firmware - or would it work as is with only that reg as Trident-SR?
They have lower noise and run much cooler. Output impedance is very close. PSRR is better.
I very much have appreciated the change in my DAC since I introduced them. Everything is happier. 🙂
All around they are an improvement and don't waste any juice from your main power supply.
The have a slower start up time because of the big filter caps - so it is suggested you update your firmware on the B3/B3SE if you plan to use them.
You would still want to update the firmware. The 1.2V reg is critical. We have a bundle where the firmware is given at cost if you get the set. That is the best course.
With shunt regs, current consumption is around 440mA - approx how much is it with trident-sr's? (of course there is variation with sample rate etc...)
It totally depends on the scenario - but I am measuring 325ma at 192Khz playing music from one Placid HD which is also powering a Cronus/Hermes (which takes about ~70ma). So something like 250ma. 🙂
Because of the higher cost of the components and assembly (which is being done here in the U.S. in house) . It has a lot more large caps than the older trident.