Besides the cap testing, i had ordered 4 Mundorf Supreme 1µF,
i made some unexpected experiances with tube rectifier rolling.
More in my blog.
i made some unexpected experiances with tube rectifier rolling.
An externally hosted image should be here but it was not working when we last tested it.
More in my blog.
No, only the 3 i have here. In the meantime i have listen to some tracks like:
Santana - Milagro
Kenny Loggins - Outside: From the Redwoods (live)
Oscar Peterson Trio - We get requests
Peter Gabriel - So (Remastered)
Sara K. - Water Falls
Simple Minds - Street Fighting Years
I really don´t know what happened... Whatever i play,
I never ever heard my rig sound that good !
Not with the Discrete Diamond Non-Feetback I/V stage from Pedja Rogic nor with -ecdesigns- MK7 I/V stage.
I only change that damn tube rectifier for the HV of the Tube-I-zator. I am absolute speachless.
Unbeleavable
Santana - Milagro
Kenny Loggins - Outside: From the Redwoods (live)
Oscar Peterson Trio - We get requests
Peter Gabriel - So (Remastered)
Sara K. - Water Falls
Simple Minds - Street Fighting Years
I really don´t know what happened... Whatever i play,
I never ever heard my rig sound that good !
Not with the Discrete Diamond Non-Feetback I/V stage from Pedja Rogic nor with -ecdesigns- MK7 I/V stage.
I only change that damn tube rectifier for the HV of the Tube-I-zator. I am absolute speachless.
Unbeleavable
I only change that damn tube rectifier for the HV of the Tube-I-zator. I am absolute speachless.
Unbeleavable
Do you mean in concert with the SSHV? I am surprised the rectifier tube choice has much influence?
Yes it still has big influence, whysoever. I much prefer tube rectification over SS, and from the tube rectifiers the best I tried was the venerable old AZ1, as I don't need more than 80ma current. But the AZ1 has 4V filament supply, which can be a problem with existing transformers. And it has funny sockets, too.
The RCA 5AR4GY Salas mentioned is the best from the bigger rectifiers to my ears.
And film caps in the power supply do noticable better than electrolytics, and the quality of the choke, if used, is clearly audible. All this with the shunt...
Its fun to try all these different choices..
cheers,
Juergen
The RCA 5AR4GY Salas mentioned is the best from the bigger rectifiers to my ears.
And film caps in the power supply do noticable better than electrolytics, and the quality of the choke, if used, is clearly audible. All this with the shunt...
Its fun to try all these different choices..
cheers,
Juergen
I understand, but my prefilter CLCRC has a huge R value simply because I needed to a lot of drop voltage to use the transformers I had on hand, obviously this made the prefilter "output impedance" quite large and I thought you said earlier this wouldn't hurt as the SSHV ultimately gives a the very low output impedance regardless of its feed. That is why I am surprised that the rectifier is influencing the sound.
As you perhaps see in my blog, i use only Mundorf film caps in my psu.
3,9uF Supreme silver/oil - 10H amorph choke - 47uF TubeCap - 100R - 100uF TubeCap
Perhaps that part choice is is able to show the sound differences between the tube rectifier better than electrolytics.
One thing is clear, that 5UC3 Black Plate stays
This rectifier was the biggest SQ step i've ever made !
Last edited:
It does not have to do with the impedance of the output loop, and won't hurt that aspect. Each rectifier type along with the filtering scheme chosen will deliver the current asked by the CCS in different efficiency and high order byproducts. They had been much less obvious than in fully passive, still they could be picked in my initial tests. More so if with Maida series reg. Soft recovery diode bridges were less differentiating subjectively by type, and had better bass. The tube rectifiers could be more pleasant, maybe less honest though.
Maybe you could try to get your voltage down by lowering the first filter cap to something around or below 1µF. This drops the voltage significantly, and gets more of a choke input characteristic. And simultaniously to put in a second choke after the second cap instead of the big resistor; perhaps you can lower the value of the caps then and use good PIO or film caps instead. The "last" cap of the supply is the most important sonically.
This should give a significant improvement in dynamics and "flow", as you don't burn energy in the resistor anymore and the whole supply becomes faster.
I always use cheap inductors from old radios for testing, they can be quite goo as they knew how to wind these properly back in the 40ies/50ies.
And for the WE274A: Sadly I am not a German dentist
Last edited:
One thing is clear, that 5UC3 Black Plate stays
This rectifier was the biggest SQ step i've ever made !
It looks like the bigger plates you use the better it goes for you subjectively. There is much difference between 5Y3WGT and 5U4GB in current spec. Tubes were not made with CCS draw in mind, they will behave and get old in a different manner than usual.
And for the WE274A: Sadly I am not a German dentist
That's a lampizator's punch line?
The Shuguang ain't a bad copy for the money BTW.
Something must be wrong...
Thatas exactly what I'm doing; although to my surprise I prefer the solid plate, better bass and more coherent, less treble extension though. But the meshies are so nice to look at, piece of art: Jimmy’s Junkyard 2011 February
Maybe you could try to get your voltage down by lowering the first filter cap to something around or below 1µF. This drops the voltage significantly, and gets more of a choke input characteristic. And simultaniously to put in a second choke after the second cap instead of the big resistor; perhaps you can lower the value of the caps then and use good PIO or film caps instead. The "last" cap of the supply is the most important sonically.
This should give a significant improvement in dynamics and "flow", as you don't burn energy in the resistor anymore and the whole supply becomes faster.
I always use cheap inductors from old radios for testing, they can be quite goo as they knew how to wind these properly back in the 40ies/50ies.
And for the WE274A: Sadly I am not a German dentist
For the last cap (zobel) I did swap to the russian K75 bypased with the russian teflon, big improvement.
Haven't given the prefilter much thought, butI do still measure a bump at 120hz (also 60, 180 and 300), all under -100db. I assumed grounding causing this, but maybe your suggestions would improve this. Thanks
When you mean the different versions of the SSHV reg I pretty much answered that in post 1951. Although
the improvement to my ears is more due to the better parts quality, esp. the caps as discussed in this thread before.
I did not compare both versions with the exact same parts so its hard to say.
When I was you I would play with the Vref cap and the Zobel cap... a very worthwhile field for experiments.